MODEL GFC 7000TA CARBON DIOXIDE ANALYZER Operation Manual Also supports operation of: GFC 7000T CO2 Analyzer (when used in conjunction with GFC 7000T Addendum, PN 07273) P/N M07272 DATE 06/04/13 TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 16830 Chestnut Street City of Industry, CA 91748 Telephone: (626) 934-1500 Fax: (626) 961-2538 Web: www.teledyne-ai.
Model GFC7000TA Carbon Dioxide Analyzer Copyright © 2013 Teledyne Analytical Instruments All Rights Reserved.
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Safety Messages Model GFC7000TA Carbon Dioxide Analyzer SAFETY MESSAGES Important safety messages are provided throughout this manual for the purpose of avoiding personal injury or instrument damage. Please read these messages carefully. Each safety message is associated with a safety alert symbol, and are placed throughout this manual; the safety symbols are also located inside the instrument.
Safety Messages Model GFC7000TA Carbon Dioxide Analyzer CONSIGNES DE SÉCURITÉ Des consignes de sécurité importantes sont fournies tout au long du présent manuel dans le but d’éviter des blessures corporelles ou d’endommager les instruments. Veuillez lire attentivement ces consignes. Chaque consigne de sécurité est représentée par un pictogramme d’alerte de sécurité; ces pictogrammes se retrouvent dans ce manuel et à l’intérieur des instruments.
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Manual Information Model GFC7000TA Carbon Dioxide Analyzer ABOUT THIS MANUAL This manual, PN 07272, provides operation instructions for the GFC 7000TA Analyzer, and supports operation of the Model GFC 7000T (when used in conjunction with the GFC 7000T Addendum, PN 07273). This manual is comprised of multiple documents as listed below. Part No.
Manual Information Model GFC7000TA Carbon Dioxide Analyzer 2010, T360 Manual, PN0 Rev A, DCN Document PN Rev 0xxxx X DCN Change Summary Initial Release For the purpose of capturing this manual’s construct at its initial release, the following list documents the current Rev of each part comprising Rev A of this manual. Any future changes to this manual will be recorded in this Revision History section, most recent changes at the top.
Table of Contents Model GFC7000TA Carbon Dioxide Analyzer TABLE OF CONTENTS SAFETY MESSAGES ............................................................................................................................................... v CONSIGNES DE SÉCURITÉ ................................................................................................................................... vi ABOUT this MANUAL .................................................................................................
Table of Contents Model GFC7000TA Carbon Dioxide Analyzer 6.2.1. Test Functions .......................................................................................................................................... 65 6.2.2. Warning Messages ................................................................................................................................... 67 6.3. Calibration Mode ...........................................................................................................
Table of Contents Model GFC7000TA Carbon Dioxide Analyzer 8. MAINTENANCE SCHEDULE & PROCEDURES .................................................................................................. 179 8.1. Maintenance Schedule ................................................................................................................................... 179 8.2. Predicting Failures Using the Test Functions .................................................................................................
Table of Contents Model GFC7000TA Carbon Dioxide Analyzer 10.5.4. Touchscreen Interface .......................................................................................................................... 242 10.5.5. LCD Display Module ............................................................................................................................. 242 10.5.6. Relay Board ......................................................................................................................
Table of Contents Model GFC7000TA Carbon Dioxide Analyzer LIST OF FIGURES Figure 3-1: Figure 3-2: Figure 3-3: Figure 3-4: Figure 3-5: Figure 3-6: Figure 3-7: Figure 3-8: Figure 3-9: Figure 3-10: Figure 3-11: Figure 3-12: Figure 3-13: Figure 3-14: Figure 3-15: Figure 3-16: Figure 5-1: Figure 5-2: Figure 5-3: Figure 5-4: Figure 5-5: Figure 5-6: Figure 6-1: Figure 6-2: Figure 6-3: Figure 6-4: Figure 6-5: Figure 6-6: Figure 6-7: Figure 6-8: Figure 6-9: Figure 6-10: Figure 6-11: Figure 6-12: Figure 6-13: Figur
Table of Contents Figure 9-6: Figure 9-7: Figure 9-8: Figure 9-9: Figure 9-10: Figure 9-11: Figure 9-12: Figure 9-13: Figure 9-14: Figure 9-15: Figure 9-16: Figure 9-17: Figure 9-18: Figure 10-1: Figure 10-2: Figure 10-3: Figure 10-4: Figure 10-5: Figure 10-6: Figure 10-7: Figure 10-8: Figure 10-9: Figure 10-10: Figure 10-11: Figure 10-12: Figure 11-1: Figure 11-2: Model GFC7000TA Carbon Dioxide Analyzer Chopped IR Signal ....................................................................................
Table of Contents Model GFC7000TA Carbon Dioxide Analyzer Table 6-14: Variable Names (VARS) Revision B.3 .............................................................................................. 118 Table 6-15: GFC 7000TA Diagnostic (DIAG) Functions ...................................................................................... 120 Table 6-16: DIAG - Analog I/O Functions ............................................................................................................
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Introduction Model GFC7000TA Carbon Dioxide Analyzer 1. INTRODUCTION The Models GFC 7000TA and GFC 7000TM differ only in specifications; unless clearly differentiated, both models in this manual are referred to as the GFC 7000TA for simplification. The GFC 7000TA measures carbon dioxide CO2 by comparing infrared energy absorbed by a sample to that absorbed by a reference according to the Beer-Lambert law.
Introduction Model GFC7000TA Carbon Dioxide Analyzer 3 GETTING STARTED: Instructions for setting up, installing, and performing a functional check and initial calibration. 4 FAQ Answers to the most frequently asked questions about operating the analyzer. 5 OPTIONAL HARDWARE & SOFTWARE A description of optional equipment to add functionality to your analyzer. 6 OPERATION INSTRUCTIONS This section includes step-by-step instructions for operating the analyzer and using its various features and functions.
Introduction Model GFC7000TA Carbon Dioxide Analyzer Teledyne Analytical Instruments 3
Specifications Model GFC7000TA Carbon Dioxide Analyzer 2. SPECIFICATIONS AND APPROVALS 2.1. Specifications Table 2-1: Model GFC 7000TA Basic Unit Specifications GFC 7000TA Parameter GFC 7000TA Specification Ranges Min: 0-2 ppm Full scale (Physical Analog Output) Max: 0-2,000 ppm Full scale Selectable, dual ranges and auto ranging supported Measurement Units ppb, ppm, µg/m3, mg/m3, % (user selectable) Zero Noise < 0.1 ppm (RMS) Span Noise < 1% of reading (RMS) Lower Detectable Limit < 0.
Specifications Model GFC7000TA Carbon Dioxide Analyzer GFC 7000TA Parameter GFC 7000TA Specification Weight 40 lbs. (18.1 kg) Certifications CE: EN61010-1:90 + A1:92 + A2:95, EN61326 - Class A 1 At constant temperature and voltage.
Specifications Model GFC7000TA Carbon Dioxide Analyzer GFC 7000TM Parameter GFC 7000TM Specification Certifications CE: EN61010-1:90 + A1:92 + A2:95, EN61326 - Class A 1 At constant temperature and voltage. 2.2. CE Mark Compliance Emissions Compliance The Teledyne Instruments Model GFC 7000TA Gas Filter Correlation CO2 Analyzer was tested and found to be fully compliant with: EN61326 (1997 w/A1: 98) Class A, FCC Part 15 Subpart B section 15.107 Class A, ICES-003 Class A (ANSI C63.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3. GETTING STARTED 3.1. Unpacking and Initial Set Up CAUTION To avoid personal injury, always use two persons to lift and carry the Model GFC 7000TA. WARNING Never disconnect PCAs, wiring harnesses or electronic subassemblies while the instrument is under power. CAUTION – Avoid Warranty Invalidation Printed circuit assemblies (PCAs) are sensitive to electro-static discharges too small to be felt by the human nervous system.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 4. Inspect the interior of the instrument to make sure all circuit boards and other components are in good shape and properly seated. 5. Check the connectors of the various internal wiring harnesses and pneumatic hoses to make sure they are firmly and properly seated. 6. Verify that all of the optional hardware ordered with the unit has been installed. These are listed on the paperwork accompanying the analyzer.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.2. Front Panel Figure 3-1 shows the analyzer’s front panel layout, followed by a close-up of the display screen in Figure 3-2, which is described in Table 3-1.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Figure 3-2: Display Screen and Touch Control CAUTION – Avoid Damaging Touchscreen Do not use hard-surfaced instruments such as pens to operate the touchscreen. The front panel liquid crystal display includes touch control. Upon analyzer start-up, the display shows a splash screen and other initialization indicators before the main display appears, similar to Figure 3-2 above (may or may not display a Fault alarm).
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Table 3-1: Display and Touchscreen Control Description Field Status Description/Function LEDs indicating the states of Sample, Calibration and Fault, as follows: Name Color SAMPLE Green CAL FAULT Yellow Red State Off Definition Unit is not operating in sample mode, DAS is disabled. On Sample Mode active; Front Panel Display being updated; DAS data being stored.
Getting Started Figure 3-3: Model GFC7000TA Carbon Dioxide Analyzer Display/Touch Control Screen Mapped to Menu Charts Teledyne Analytical Instruments 14
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.3.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Table 3-2: Component cooling fan AC power connector Model/specs label Rear Panel Description Function Pulls ambient air into chassis through side vents and exhausts through rear Connector for three-prong cord to apply AC power to the analyzer CAUTION! The cord’s power specifications (specs) MUST comply with the power specs on the analyzer’s rear panel Model number label Identifies the analyzer model number and provides power specs PURGE IN SAMPLE
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.4. Internal Layout Figure 3-3 shows a top-down view of the analyzer. The shown configuration includes the Ethernet board, IZS option, zero-air scrubber and an additional sample dryer. See Section 5 for optional equipment.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Sample Gas Outlet fitting Sample Gas Flow Sensor Sample Chamber Sync/Demod PCA Housing Pressure Sensor(s) Bench Temperature Thermistor Shock Absorbing Mounting Bracket Opto-Pickup PCA Purge Gas Pressure Regulator IR Source GFC Wheel Heat Sync GFC Wheel Motor GFC Temperature Sensor Purge Gas Inlet GFC Heater Figure 3-6: Optical Bench Layout Teledyne Analytical Instruments 18
Model GFC7000TA Carbon Dioxide Analyzer Purge Gas Flow Control Getting Started Figure 3-7: GFC 7000TA Internal Gas Flow 3.5. Electrical Connections WARNING Never disconnect PCAs, wiring harnesses or electronic subassemblies while the instrument is under power. NOTE To maintain compliance with EMC standards, it is required that the cable length be no greater than 3 meters for all I/O connections, which include Analog In, Analog Out, Status Out, Control In, Ethernet/LAN, USB, RS-232, and RS-485.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.5.1. Power Connection WARNING Power connection must have functioning ground connection. Do not defeat the ground wire on power plug. Turn off analyzer power before disconnecting or connecting electrical subassemblies. Do not operate with cover off. CAUTION Check the voltage and frequency specifications on the rear panel Model Label for compatibility with the local power before plugging the analyzer into line power.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Pin assignments for the Analog In connector are presented in Table 3-3. Table 3-3: Analog Input Pin Assignments PIN DAS PARAMETER1 DESCRIPTION 1 Analog input # 1 AIN 1 2 Analog input # 2 AIN 2 3 Analog input # 3 AIN 3 4 Analog input # 4 AIN 4 5 Analog input # 5 AIN 5 6 Analog input # 6 AIN 6 7 Analog input # 7 AIN 7 8 Analog input # 8 AIN 8 GND Analog input Ground N/A 1 See Section 6.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Table 3-4: PIN 1 2 3 4 GFC 7000TA Analog Output Pin Outs ANALOG OUTPUT A1 A2 VDC SIGNAL MADC SIGNAL V Out I Out + Ground I Out - V Out I Out + Ground I Out - A3 V Out I Out + 6 (Only used if O2 sensor is installed) Ground I Out - 7 A4 5 8 V Out Not used Ground Not used The default analog output voltage setting of the GFC 7000TA CO2 Analyzer is 0 – 5 VDC with a range of 0 – 500 ppm.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.5.4. Connecting the Status Outputs If you wish utilize the analyzer’s status outputs to interface with a device that accepts logic-level digital inputs, such as programmable logic controllers (PLC’s) they are accessed via a 12-pin connector on the analyzer’s rear panel labeled STATUS. STATUS 1 2 3 4 5 6 7 8 D + NOTE Most PLC’s have internal provisions for limiting the current the input will draw.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.5.5. Connecting the Control Inputs If you wish to use the analyzer to remotely activate the zero and span calibration modes, several digital control inputs are provided through a 10-pin connector labeled CONTROL IN on the analyzer’s rear panel. There are two methods for energizing the control inputs. The internal +5V available from the pin labeled “+” is the most convenient method.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.5.6. Connecting the Communications Interfaces For RS-232 or RS-485 communications through the analyzer’s serial interface com ports, refer to Section 6.11 of this manual for instructions on their configuration and usage. 3.5.6.1. Connecting to a LAN or the Internet For network or Internet communication with the analyzer, connect an Ethernet cable from the analyzer’s rear panel Ethernet interface connector to an Ethernet access port.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.6.1. Basic Pneumatic Connections NOTE In order to prevent dust from getting into the gas flow channels of your analyzer, it was shipped with small plugs inserted into each of the pneumatic fittings on the back panel. Remove these plugs before operating the analyzer. It is recommended that they be stored for future use (moving, storing or shipping the analyzer).
Getting Started Figure 3-9: Figure 3-10: Model GFC7000TA Carbon Dioxide Analyzer Pneumatic Connections–Basic Configuration–Using Bottled Span Gas Pneumatic Connections–Basic Configuration–Using Gas Dilution Calibrator Teledyne Analytical Instruments 27
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 7. Attach a sample inlet line to the sample inlet port. The SAMPLE input line should not be more than 2 meters long. NOTE Ideally, the pressure of the sample gas should be at ambient pressure (0 psig). Maximum pressure of sample gas should not exceed 1.5 in-Hg over ambient.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 10. Attach a source of dried air scrubbed of CO2 to the purge inlet port. NOTE The minimum gas pressure of the source of purge air should be 7.5 psig. If the source of the purge air is shared by a Teledyne Instruments T700 (as shown in figure 3-7) the minimum gas pressure should be 25 psig and should not exceed 35 psig. 11.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.6.2. Connections with Internal Valve Options Installed Figure 3-11 and Figure 3-12 show the pneumatic connections for the ambient zero and ambient span valve option (Option 50A).
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Figure 3-13 and Figure 3-14 show the pneumatic connections for the ambient zero and ambient span valve option (Option 50B).
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.6.3. Pneumatic Connections in Multipoint Calibration Applications Some applications may require multipoint calibration checks where span gas of several different concentrations is needed. We recommend using high-concentration, certified, calibration gas supplied to the analyzer through a Gas Dilution Calibrator such as a Teledyne Instruments Model T700.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 6. Turn the instrument on. 7. Make sure the zero air supply to the analyzer’s purge line inlet is supplying gas at a stable pressure above 7.5 psig. 8. Adjust the GFC 7000TA’s pressure regulator until the attached gauge reads 7.5 psig. 9. Turn off the instrument. 10. Remove the source of zero air attached to the purge line inlet port at the back of the analyzer. 11. Remove the pressure gauge and reattach the end cap removed in step 4 above. 12.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.7.2. Warm Up During the warm-up period various portions of the instrument’s front panel may behave as indicated in Table 3-8. Table 3-8: NAME COLOR Front Panel Display During System Warm-Up BEHAVIOR SIGNIFICANCE Conc field N/A Displays current, compensated CO2 Concentration This is normal operation, but deemed inaccurate during the warm-up period. Mode field N/A Displays current mode, e.g.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer Table 3-9: Possible Warning Messages at Start-Up MESSAGE MEANING ANALOG CAL WARNING The instrument’s A/D circuitry or one of its analog outputs is not calibrated. BENCH TEMP WARNING The optical bench Temperature is outside the specified limits. BOX TEMP WARNING Remote span calibration failed while the dynamic span feature was set to turned on.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.7.4. Functional Check 1. After the analyzer’s components has warmed up for at least 30 minutes, verify that the software properly supports any hardware options that were installed. 2. Check to make sure that the analyzer is functioning within allowable operating parameters. Appendix C includes a list of test functions viewable from the analyzer’s front panel as well as their expected values.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.8. Initial Calibration Procedure The next task is to calibrate the analyzer. To perform the following calibration you must have sources for zero air and span gas available for input into the sample port on the back of the analyzer. See Section 3.1.3 for instructions for connecting these gas sources. While it is possible to perform this procedure with any range setting we recommend that you perform this initial checkout using the 500 ppm range.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 2. Set the expected CO2 span gas concentration SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL The CO2 span concentration values automatically default to 400.0 Conc. To change this value to the actual concentration of the span gas, enter the number by pressing the button under each digit until the expected value appears. SETUP M-P CAL RANGE = 500.000 PPM < TST TST > ZERO CO2 =X.XXX EXIT CONC M-P CAL CO2 SPAN CONC: 400.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3. Perform the Zero/Span Calibration Procedure SAMPLE* RANGE = 500.000 PPM < TST TST > CAL SAMPLE CO2 =XXX.X SETUP STABIL=XXX.X PPM < TST TST > CAL Set the Display to show the STABIL test function. This function calculates the stability of the COx measurement CO2 =XXX.X SETUP ACTION: Allow zero gas to enter the sample port at the rear of the instrument. Wait until STABIL falls below 1.0 ppm. M-P CAL STABIL=XXX.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer 3.8.1. Initial O2 Sensor Calibration Procedure If your instrument has an O2 sensor option installed that should be calibrated as well. 3.8.1.1. O2 Calibration Setup at 20.
Getting Started SAMPLE RANGE = 500.000 PPM < TST TST > SAMPLE CO2 CAL Model GFC7000TA Carbon Dioxide Analyzer CO2 =XXX.X SETUP GAS TO CAL:CO2 ENTR EXIT O2 M-P CAL A1:NXCNC1 =100PPM NOX=X.XXX ZERO SPAN CONC SAMPLE NOX EXIT GAS TO CAL:O2 O2 ENTR EXIT M-P CAL 0 O2 SPAN CONC:20.8% 2 0 .8 0 ENTR EXIT The O2 span concentration value automatically defaults to 20.8 %.
Getting Started SAMPLE Model GFC7000TA Carbon Dioxide Analyzer RANGE = 500.000 PPM < TST TST > SETUP X.X CO2 =XXX.X SETUP X.X CAL SETUP JUMP EXIT Continue pressing NEXT until ... SECONDARY SETUP MENU COMM VARS DIAG ALRM EXIT SETUP X.X 2) STABIL_GAS=CO2 JUMP SETUP X.X 8 1 EDIT PRNT EXIT PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X 0) DAS_HOLD_OFF=15.0 Minutes ENTER PASSWORD:818 8 ENTR EXIT SETUP X.X CO2 STABIL_GAS:CO2 O2 SETUP X.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer STEP 4 – O2 Zero/Span Calibration perform by pressing: The Model GFC 7000TA Analyzer is now ready for operation.
Getting Started Model GFC7000TA Carbon Dioxide Analyzer NOTE Once you have completed the above set-up procedures, please fill out the Quality Questionnaire that was shipped with your unit and return it to Teledyne Instruments. This information is vital to our efforts in continuously improving our service and our products. THANK YOU.
FAQ Model GFC7000TA Carbon Dioxide Analyzer 4. FREQUENTLY ASKED QUESTIONS 4.1. FAQ’s The following is a list from the Teledyne Instruments’ Customer Service Department of the most commonly asked questions relating to the Model CO2 Analyzer. Q: How do I get the instrument to zero / Why is the zero key not displayed? A: See Section 11.3.4 Inability to zero. Q: How do I get the instrument to span / Why is the span key not displayed? A: See Section 11.3.3 Inability to span.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Q: Where is the sintered filter/sample flow control orifice? A: These components are located inside the flow control assembly that is attached to the inlet side of the sample pump, see Figure 3-3. See Section 11.6.1 for instructions on disassembly and replacement. Q: How do I set up a SEQUENCE to run a nightly calibration check? A: The setup of this option is located in Section 7.6.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Term Description/Definition HNO3 nitric acid H2S hydrogen sulfide NO nitric oxide NO2 nitrogen dioxide NOX nitrogen oxides, here defined as the sum of NO and NO2 NOy nitrogen oxides, often called odd nitrogen: the sum of NOX plus other compounds such as HNO3 (definitions vary widely and may include nitrate (NO3), PAN, N2O and other compounds as well) NH3 ammonia O2 molecular oxygen O3 ozone SO2 sulfur dioxide 3 cm metric abbreviation for
FAQ Model GFC7000TA Carbon Dioxide Analyzer Term GFC 2 Description/Definition Gas Filter Correlation I C bus a clocked, bi-directional, serial bus for communication between individual analyzer components IC Integrated Circuit, a modern, semi-conductor circuit that can contain many basic components such as resistors, transistors, capacitors etc in a miniaturized package used in electronic assemblies IP Internet Protocol IZS Internal Zero Span LAN Local Area Network LCD Liquid Crystal Display
FAQ Model GFC7000TA Carbon Dioxide Analyzer Term Description/Definition Rdg Reading RS-232 specification and standard describing a serial communication method between DTE (Data Terminal Equipment) and DCE (Data Circuit-terminating Equipment) devices, using a maximum cable-length of 50 feet RS-485 specification and standard describing a binary serial communication method among multiple devices at a data rate faster than RS-232 with a much longer distance between the host and the furthest device SAR
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FAQ Model GFC7000TA Carbon Dioxide Analyzer 5. OPTIONAL HARDWARE AND SOFTWARE This includes a brief description of the hardware and software options available for the Model GFC 7000TA Gas Filter Correlation Carbon Dioxide Analyzer.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Figure 5-1: Current Loop Option Installed on the Motherboard 5.2.1. Converting Current Loop Analog Outputs to Standard Voltage Outputs NOTE Servicing or handling of circuit components requires electrostatic discharge protection, i.e. ESD grounding straps, mats and containers. Failure to use ESD protection when working with electronic assemblies will void the instrument warranty. See Section 12 for more information on preventing ESD damage.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Remove the set screw located in the top, center of the rear panel Remove the screws fastening the top cover to the unit (four per side). Slide the cover back and lift straight up . 4. Disconnect the current loop option PCA from the appropriate connector on the motherboard (see Figure 5-1). 5. Place a shunt between the leftmost two pins of the connector (see Figure 5-1). 6. Reattach the top case to the analyzer. 7.
FAQ Model GFC7000TA Carbon Dioxide Analyzer 5.4. Calibration Valves Options There are four available options involving Zero/span valves. From an operational and software standpoint, all of the options are the same, only the source of the span and zero gases are different. 5.4.1. Ambient Zero/Pressurized Span Valve This option requires that both zero air and span gas be supplied from external sources.
External CO2 Scrubber (Option 51 only) GFC Motor Heat Sync Purge Gas Flow Control GFC Wheel Housing Model GFC7000TA Carbon Dioxide Analyzer SAMPLE CHAMBER FAQ Figure 5-2: Internal Pneumatic Flow – Ambient Zero/Pressurized Span Valves 5.4.2. Ambient Zero/Ambient Span Valve This valve option is intended for applications where zero air is supplied by a zero air generator like a bottle of N2 and span gas are being supplied by Gas Dilution Calibrator like the Teledyne Instruments Model 700 or 702.
FAQ Model GFC7000TA Carbon Dioxide Analyzer The minimum span gas flow rate required for this option is 800 cm3/min. By activating the instrument’s AutoCal feature (Section 7.6), Remotely by using the external digital control inputs (Sections 6.15.1.2 and 7.5.2), or Remotely through the RS-232/485 serial I/O ports (see Appendix A-6).
FAQ Model GFC7000TA Carbon Dioxide Analyzer 5.5. Communication Options 5.5.1. Communications Cables Type Description 60A RS-232 Shielded, straight-through DB-9F to DB-25M cable, about 1.8 m long. Used to interface with older computers or code activated switches with DB-25 serial connectors. 60B RS-232 Shielded, straight-through DB-9F to DB-9F cable of about 1.8 m length. 60C Ethernet Patch cable, 2 meters long, used for Internet and LAN communications.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Figure 5-4: Multi-drop/LVDS PCA Seated on CPU 5.6. Oxygen Sensor (OPT 65) 5.6.1. Theory of Operation 5.6.1.1. Paramagnetic measurement of O2 The oxygen sensor used in the GFC 7000TA analyzer utilizes the fact that oxygen is attracted into strong magnetic field; most other gases are not, to obtain fast, accurate oxygen measurements.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Figure 5-5: Oxygen Sensor - Principle of Operation 5.6.1.2. Operation within the GFC 7000TA Analyzer The oxygen sensor option is transparently integrated into the core analyzer operation. All functions can be viewed or accessed through the front panel, just like the functions for CO2 The O2 concentration is displayed in the upper right-hand corner, alternating with CO2 concentration.
FAQ Model GFC7000TA Carbon Dioxide Analyzer Figure 5-6: GFC 7000TA – Internal Pneumatics with O2 Sensor Option 65 Teledyne Analytical Instruments 60
FAQ Model GFC7000TA Carbon Dioxide Analyzer 5.7. Special Features 5.7.1. Dilution Ratio Option The Dilution Ration Option is a software option that is designed for applications where the Sample gas is diluted before being analyzed by the Model GFC 7000TA. Typically this occurs in Continuous Emission Monitoring (CEM) applications where the quality of gas in a smoke stack is being tested and the sampling method used to remove the gas from the stack dilutes the gas.
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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6. OPERATING INSTRUCTIONS To assist in navigating the analyzer’s software, a series of menu trees can be found in Appendix A-1 of this manual. NOTES The flow charts appearing in this contain typical representations of the analyzer’s display during the various operations being described. These representations may differ slightly from the actual display of your instrument.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Besides SAMPLE and SETUP, other modes the analyzer can be operated in are: Table 6-1: Analyzer Operating modes MODE DIAG One of the analyzer’s diagnostic modes is being utilized (See Section 6.13). M-P CAL This is the basic, multi-point calibration mode of the instrument and is activated by pressing the CAL key. SAMPLE Sampling normally, flashing indicates adaptive filter is on.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.2.1. Test Functions Test functions are shown on the front panel display while the analyzer is in SAMPLE mode. They provide information about the present operating status of the instrument and can be used troubleshooting and can be recorded in one of the DAS channels (Section 6.7) for data analysis. To view, press the buttons.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To view the TEST Functions press: SAMPLE RANGE = 500.000 PPM CO2 = XXX.X < TST TST > CAL SETUP RANGE 1 RANGE1 1 RANGE2 O 2 RANGE STABIL MEAS REF MR RATIO Refer to PRES Table 6-2 for SAMP FL definitions of SAMP TEMP these test BENCH TEMP functions. WHEEL TEMP BOX TEMP PHT DRIVE SLOPE OFFSET TEST TIME Toggle buttons to scroll through list of 1 Only appears instrument is set for DUAL or AUTO reporting range modes.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.2.2. Warning Messages The most common instrument failures will be reported as a warning on the analyzer’s front panel and through the COM ports. Section 11.1.1 explains how to use these messages to troubleshoot problems. Section 3.2.3 shows how to view and clear warning messages. Table 6-3 lists all warning messages for the current version of software.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To view and clear warning messages: SAMPLE TEST deactivates warning messages TEST SYSTEM RESET CAL SAMPLE CO2 = 0.00 MSG CLR SETUP CO2 = 0.00 RANGE=500.000 PPM MSG displays warning messages. < TST TST > CAL SAMPLE NOTE: If the warning message persists after several attempts to clear it, the message may indicate a real problem and not an artifact of the warm-up period Figure 6-3: TEST MSG CLR CO2 = 0.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.4. SETUP MODE The SETUP mode contains a variety of choices that are used to configure the analyzer’s hardware and software features, perform diagnostic procedures, gather information on the instruments performance and configure or access data from the internal data acquisition system (DAS). For a visual representation of the software menu trees, refer to Appendix A.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.5. SETUP CFG: Viewing the Analyzer’s Configuration Information Pressing the CFG button displays the instrument configuration information. This display lists the analyzer model, serial number, firmware revision, software library revision, CPU type and other information. Use this information to identify the software and hardware when contacting customer service.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7. SETUP DAS: Using the Data Acquisition System (DAS) The GFC 7000TA analyzer contains a flexible and powerful, internal data acquisition system (DAS) that enables the analyzer to store concentration and calibration data as well as a host of diagnostic parameters. The DAS of the GFC 7000TA can store up to about one million data points, which can, depending on individual configurations, cover days, weeks or months of valuable measurements.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.1. DAS Structure The DAS is designed around the feature of a “record”. A record is a single data point of one parameter, stored in one (or more) data channels and generated by one of several triggering event. The entire DAS configuration is stored in a script, which can be edited from the front panel or downloaded, edited and uploaded to the instrument in form of a string of plain-text lines through the communication ports.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.1.2. DAS Parameters Data parameters are types of data that may be measured and stored by the DAS. For each Teledyne Instruments analyzer model, the list of available data parameters is different, fully defined and not customizable. Appendix A-5 lists firmware specific data parameters for the analyzer.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.1.3. DAS Triggering Events Triggering events define when and how the DAS records a measurement of any given data channel. Triggering events are firmware-specific and a complete list of Triggers for this model analyzer can be found in Appendix A-5. The most commonly used triggering events are: ATIMER: Sampling at regular intervals specified by an automatic timer.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer TEMP: Samples the analyzer’s bench temperature, box temperature and PHT cooler drive voltage every five minutes and records an average once every six hours. Data from the last 400 averaging periods is recorded. A time and date stamp is recorded for every data point logged. This information is useful for performing predictive diagnostics as part of a regular maintenance schedule (See Section 9.1).
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer These default Data Channels can be used as they are, or they can be customized from the front panel to fit a specific application. They can also be deleted to make room for custom user-programmed Data Channels. Appendix A-5 lists the firmware-specific DAS configuration in plain-text format.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.2. Viewing DAS Data and Settings DAS data and settings can be viewed on the front panel through the following touchscreen buttons sequence. TOUCHSCREEN BUTTON FUNCTIONS SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.3. Editing DAS Data Channels DAS configuration is most conveniently done through the APICOM remote control program. The following list of key strokes shows how to edit using the front panel. SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL EXIT will return to the previous SAMPLE display. SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE EXIT Main Data Acquisition Menu SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To edit the name of a data channel, follow the above touchscreen button sequence and then press: From the end of the previous button sequence … SETUP X.X EDIT SETUP X.X C NAME:CONC PRINT EXIT NAME:CONC O N C - - ENTR EXIT ENTR accepts the new string and returns to the previous menu. EXIT ignores the new string and returns to the previous menu.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.5. Editing DAS Parameters Data channels can be edited individually from the front panel without affecting other data channels. However, when editing a data channel, such as during adding, deleting or editing parameters, all data for that particular channel will be lost, because the DAS can store only data of one format (number of parameter columns etc.) for any given channel.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To configure a specific data parameter, press: FROM THE EDIT DATA PARAMETER MENU (see previous section) SETUP X.X 0) PARAM=CONC1, MODE=AVG PREV NEXT SETUP X.X INS DEL EDIT EXIT PARAMETERS:CONC1 EXIT SET> EDIT SETUP X.X PARAMETERS: 1 PREV NEXT ENTR EXIT If more than on parameter is active for this channel, these cycle through list of existing Parameters. SETUP X.X SAMPLE MODE:AVG EXIT EDIT SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.6. Sample Period and Report Period The DAS defines two principal time periods by which sample readings are taken and permanently recorded: SAMPLE PERIOD: Determines how often DAS temporarily records a sample reading of the parameter in volatile memory.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To define the REPORT PERIOD, follow the instruction shown in Section 6.7.2.2 then press: From the DATA ACQUISITION menu (see Section 6.7.2.2) Use the PREV and NEXT buttons to scroll to the data channel to be edited. Edit Data Channel Menu SETUP X.X 0) CONC: PREV NEXT SETUP X.X
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.7. Number of Records The number of data records in the GFC 7000TA is limited to about a cumulative one million data points in all channels (one megabyte of space on the disk-on-chip). However, the actual number of records is also limited by the total number of parameters and channels and other settings in the DAS configuration. Every additional data channel, parameter, number of samples setting etc.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.8. RS-232 Report Function The GFC 7000TA DAS can automatically report data to the communications ports, where they can be captured with a terminal emulation program or simply viewed by the user. To enable automatic COM port reporting, follow the instruction shown in Section 6.7.2.2 then press: From the DATA ACQUISITION menu (see Section 6.7.2.2) Edit Data Channel Menu SETUP X.X PREV NEXT SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.11. Disabling/Enabling Data Channels Data channels can be temporarily disabled, which can reduce the read/write wear on the disk-on-chip. The ALL_01 channel of the GFC 7000TA, for example, is disabled by default. To disable a data channel, follow the instruction shown in Section 6.7.2.2 then press: From the DATA ACQUISITION menu (see Section 6.7.2.2) Edit Data Channel Menu SETUP X.X PREV NEXT SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.2.12. HOLDOFF Feature The DAS HOLDOFF feature allows to prevent data collection during calibrations and during the DAS_HOLDOFF period enabled and specified in the VARS (Section 6.12). To enable or disable the HOLDOFF, follow the instruction shown in Section 6.7.2.2 then press: From the DATA ACQUISITION menu (see Section 6.7.2.2) Edit Data Channel Menu SETUP X.X 0) CONC: PREV NEXT SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.7.3. Remote DAS Configuration Editing channels, parameters and triggering events as described in this can be performed via the APICOM remote control program using the graphic interface shown in Figure 6-5. Refer to Section 6.15 for details on remote access to the GFC 7000TA analyzer.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8. SETUP RNGE: Analog Output Reporting Range Configuration The analyzer has three active analog output signals, accessible through a connector on the rear panel.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8.1. Physical Range versus Analog Output Reporting Ranges Functionally, the Gas Filter Correlation CO2 Analyzer has one hardware Physical Range that is capable of determining CO2 concentrations between 50 ppm and 2,000 ppm. This architecture improves reliability and accuracy by avoiding the need for extra, switchable, gain-amplification circuitry.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To select the Analog Output Range Type press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SAMPLE 8 SETUP ENTER SETUP PASS : 818 1 ENTR EXIT 8 SETUP X.X CFG DAS RNGE PASS CLK MORE SETUP X.X EXIT RANGE CONTROL MENU MODE SET UNIT SETUP X.X EXIT RANGE MODE: SNGL ENTR EXIT SNGL DUAL AUTO Only one of the range modes may be active at any time. Go To Section 6.7.3 Go To Section 6.7.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8.3. Single Range Mode (SNGL) This is the default reporting range mode for the analyzer. In single range mode both A1 and A2 are set to the same reporting range. This reporting range can be any value between 50 ppm and 2 000 ppm. While the two outputs always have the same reporting range, the span, signal offset and scaling of their electronic signals may be configured for differently (e.g., A1 = 0-10 V; A2 = 0-0.1 V). See Section 6.13.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8.4. Dual Range Mode (DUAL) Selecting Dual Range mode allows the A1 and A2 outputs to be configured with different reporting ranges. The analyzer software calls these two ranges low and high. The low range setting corresponds with the analog output labeled A1 on the Rear Panel of the instrument. The high Range Setting corresponds with the A2 output.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8.5. Auto Range Mode (AUTO) In AUTO range mode, the analyzer automatically switches the reporting range between two user-defined ranges (low and high). The unit will switch from low range to high range when the CO2 concentration exceeds 98% of the low range span. The unit will return from high range back to low range once both the CO2 concentration falls below 75% of the low range span.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8.6. Range Units The GFC 7000TA can display concentrations in parts per billion (109 mols per mol, PPB), parts per million (106 mols per mol, PPM), micrograms per cubic meter (µg/m3, UG), milligrams per cubic meter (mg/m3, MG) or percent (volume CO2/volume sample gas, %). Changing units affects all of the display, analog outputs, COM port and DAS values for all reporting ranges regardless of the analyzer’s range mode.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.8.7. Dilution Ratio The dilution ratio is a software option that allows the user to compensate for any dilution of the sample gas before it enters the sample inlet. Using the dilution ratio option is a 4-step process: 1. Select reporting range units: Follow the procedure in Section 6.8.6. 2. Select the range: Use the procedures in Sections 6.8.2 – 6.8.5.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.9. SETUP PASS: Password Feature The GFC 7000TA provides password protection of the calibration and setup functions to prevent unauthorized adjustments. When the passwords have been enabled in the PASS menu item, the system will prompt the user for a password anytime a password-protected function is requested. There are three levels of password protection, which correspond to operator, maintenance, and configuration functions.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Example: If all passwords are enabled, the following keypad sequence would be required to enter the SETUP menu: SAMPLE RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL prompts for password number See Table 6-8 for Passwords and Levels Press individual buttons to set numbers SAMPLE 0 0 ENTER SETUP PASS: 0 1 SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.10. SETUP CLK: Setting the Internal Time-of-Day Clock The GFC 7000TA has a time of day clock that supports the AutoCal timer, time of day TEST function, and time stamps on most COM port messages. To set the time-of-day, press: SAMPLE RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X Enter Current Time-of-Day TIME-OF-DAY CLOCK EXIT TIME DATE SETUP X.X SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer In order to compensate for CPU clocks which run faster or slower, you can adjust a variable called CLOCK_ADJ to speed up or slow down the clock by a fixed amount every day. To change this variable, press: SAMPLE RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP Continue to press NEXT until … SETUP X.X EXIT PREV 4) CLOCK_ADJ=0 Sec/Day JUMP SETUP X.X SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11. SETUP MORE COMM: Using the Analyzer’s Communication Ports The GFC 7000TA is equipped with an Ethernet port, a USB port and two serial communication (COMM) ports located on the rear panel (Figure 3-2). Both com ports operate similarly and give the user the ability to communicate with, issue commands to, and receive data from the analyzer through an external computer system or terminal.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer The ID can also be used for to identify any one of several analyzers attached to the same network but situated in different physical locations. 6.11.2. COM Port Default Settings Received from the factory, the analyzer is set up to emulate a DCE or modem, with pin 3 of the DB-9 connector designated for receiving data and pin 2 designated for sending data. COM1: RS-232 (fixed) DB-9 male connector. o Baud rate: 19200 bits per second (baud).
Operating Instructions Figure 6-7: Model GFC7000TA Carbon Dioxide Analyzer Rear Panel Connector Pin-Outs for COM1 & COM2 in RS-232 Mode The signals from these two connectors are routed from the motherboard via a wiring harness to two 10pin connectors on the CPU card, J11 and J12.
Operating Instructions Figure 6-8: Model GFC7000TA Carbon Dioxide Analyzer CPU Connector Pin-Outs for COM1 & COM2 in RS-232 Mode Teledyne Instruments offers two mating cables, one of which should be applicable for your use. Part number WR000077, a DB-9 female to DB-9 female cable, 6 feet long. Allows connection of COM1 with the serial port of most personal computers. Also available as Option 60 (See Section 5.5.1). Part number WR000024, a DB-9 female to DB-25 male cable.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.3. RS-485 Configuration of COM2 As delivered from the factory, COM2 is configured for RS-232 communications. To configure this port for RS-485 communication, please contact the factory. If COM2 is configured for RS-485, the USB com port is no longer enabled. 6.11.4. DTE and DCE Communication RS-232 was developed for allowing communications between data terminal equipment (DTE) and data communication equipment (DCE).
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.5. COM Port Communication Modes Each of the analyzer’s serial ports can be configured to operate in a number of different modes, listed in Table 6-10 which can be combined by adding the mode ID numbers. For example, quiet mode, computer mode and internet-enabled mode would carry a combined mode ID of 11, the standard configuration on the GFC 7000TA COM2 port. Note that each COM port needs to be configured independently.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Press the following touchscreen buttons to select a communication mode for one of the com Ports, such as the following example where HESSEN PROTOCOL mode is enabled: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X SETUP X.X ID The sum of the mode IDs of the selected modes is displayed here INET ALRM EXIT COMMUNICATIONS MENU COM2 COM1 SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.6. Remote Access via the Ethernet When using the Ethernet interface, the analyzer can be connected to any standard 10BaseT or 100Base T Ethernet network via low-cost network hubs, switches or routers. The interface operates as a standard TCP/IP device on a user selectable port, which otherwise defaults to port 3000.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Table 6-12: LAN/Internet Configuration Properties PROPERTY DHCP DEFAULT STATE ON DESCRIPTION This displays whether the DHCP is turned ON or OFF. Press EDIT and toggle ON for automatic configuration after first consulting network administrator. ( This string of four packets of 1 to 3 numbers each (e.g. 192.168.76.55.) is the address of the analyzer itself. INSTRUMENT IP ADDRESS Can only be edited when DHCP is set to OFF.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To view the above properties, press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP EXIT ID INET SAMPLE 8 EXIT COM1 EXIT 8 EXIT From this point on, EXIT returns to COMMUNICATIONS MENU EXIT GATEWAY IP: 0.0.0.0 SETUP X.X EXIT INST IP: 0.0.0.0 SETUP X.X ENTR EDIT SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.6.2. Manually Configuring the Ethernet (Static IP Address) To configure Ethernet communication manually: 1. Connect a cable from the analyzer’s Ethernet port to a Local Area Network (LAN) or Internet port. 2. From the analyzer’s front panel touchscreen, access the Communications Menu as shown below, turning DHCP mode to OFF.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Next, refer to Table 6-12 for the default Ethernet configuration settings and configure the INSTRUMENT IP addresses by pressing: Teledyne Analytical Instruments 112
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.6.3. Changing the Analyzer’s HOSTNAME The HOSTNAME is the name by which the analyzer appears on your network. The default name for all Teledyne Instruments Model GFC 7000TA analyzers is GFC 7000TA. To change this name (particularly if you have more than one Model GFC 7000TA analyzer on your network), press. SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.7. Multidrop RS-232 Set Up The RS-232 multidrop consists of a printed circuit assembly that is seated on the analyzer’s CPU card (see Figures 6-10 and 6-13) and is connected to the CPU and the motherboard. This PCA includes all circuitry required to enable your analyzer for multidrop operation.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 4. Connect a cable between the Multidrop/LVDS card J4 and the motherboard P12. 5. Connect a cable between the Multidrop/LVDS card J3 and the CPU COM1 connector. 6. Close the instrument. 7. Using straight-through, DB9 male DB9 Female cable, interconnect the host and the analyzers as shown in Figure 6-14. 8.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.8. COM Port Baud Rate To select the baud rate of one of the COM Ports, press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X EXIT COMM VARS DIAG ALRM SETUP X.X Select which COM port to configure. ID EXIT COMMUNICATIONS MENU INET COM1 SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.11.9. COM Port Testing The serial ports can be tested for correct connection and output in the com menu. This test sends a string of 256 ‘w’ characters to the selected COM port. While the test is running, the red LED on the rear panel of the analyzer should flicker. To initiate the test press the following touchscreen button sequence. SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.12. SETUP MORE VARS: Internal Variables (VARS) The GFC 7000TA has several-user adjustable software variables, which define certain operational parameters. Usually, these variables are automatically set by the instrument’s firmware, but can be manually re-defined using the VARS menu. Table 6-14 lists all variables that are available within the 818 password protected level. Table 6-14: Variable Names (VARS) Revision B.3 NO.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To access and navigate the VARS menu, use the following touchscreen button sequence. SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X EXIT SECONDARY SETUP MENU COMM VARS DIAG ALRM SAMPLE EXIT EXIT ignores the new setting. ENTER SETUP PASS : 818 8 1 SETUP X.X ENTR accepts the new setting. ENTR EXIT 8 0 ) DAS_HOLD_OFF=15.0 Minutes SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13. SETUP MORE DIAG: Using the Diagnostics Functions A series of diagnostic tools is grouped together under the SETUPMOREDIAG menu. As these parameters are dependent on firmware revision (see Menu Tree A-6 in Appendix A). The individual parameters, however, are explained in more detail in the indicated in 6-15.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.1. Accessing the Diagnostic Features To access the DIAG functions press the following buttons: SAMPLE* RANGE = 500.00 PPM CO2 =X.XXX DIAG < TST TST > CAL PREV EXIT returns to the main SAMPLE display EXIT returns to the PRIMARY SETUP MENU SETUP X.X ANALOG I / O CONFIGURATION SETUP PRIMARY SETUP MENU DIAG CFG DAS RNGE PASS CLK MORE ELECTRICAL TEST EXIT PREV SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To enter the signal I/O test mode, press: SAMPLE RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP DIAG SIGNAL I / O PREV NEXT JUMP DIAG I / O PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE EXIT EXIT returns to the main SAMPLE display ENTR EXIT Test Signals Displayed Here PREV NEXT JUMP PRNT EXIT EXAMPLE SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To begin the Analog Output Step Test press: SAMPLE RANGE = 500.000 PPM CO2 =X.XXX DIAG SETUP NEXT < TST TST > CAL SETUP X.X SETUP X.X 1 EXIT NEXT ENTR DIAG AOUT ENTR EXIT EXIT ANALOG OUTPUT EXIT 0% ENTER DIAG PASS: 818 8 ANALOG OUTPUT DIAG AOUT SECONDARY SETUP MENU SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To configure the analyzer’s three analog outputs, set the electronic signal type of each channel and calibrate the outputs. This consists of: Selecting an output type (voltage or current, if an optional current output driver has been installed) and the signal level that matches the input requirements of the recording device attached to the channel, See Section 6.13.4.1. Calibrating the output channel.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer The following DC current output limits apply to the current loop modules: Table 6-18: Analog Output Current Loop Range RANGE MINIMUM OUTPUT MAXIMUM OUTPUT 0-20 mA 0 mA 20 mA These are the physical limits of the current loop modules, typical applications use 2-20 or 4-20 mA for the lower and upper limits. Please specify desired range when ordering this option. The default offset for all ranges is 0 mA.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.4.1. Analog Output Signal Type and Range Span Selection To select an output signal type (DC Voltage or current) and level for one output channel, activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.1) then press: FROM ANALOG I/O CONFIGURATION MENU DIAG PREV ANALOG I / O CONFIGURATION NEXT DIAG AIO AOUTS CALIBRATED: NO < SET SET> DIAG AIO CAL EXIT Press SET> to select the analog output channel to be configured.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To calibrate the outputs as a group, activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.1), then press: STARTING FROM DIAGNOSTIC MENU (see Section 6.13.
Operating Instructions DIAG PREV ANALOG I / O CONFIGURATION NEXT DIAG AIO < Model GFC7000TA Carbon Dioxide Analyzer SET> DIAG AIO < SET SET> DIAG AIO ENTR EXIT EXIT to Return to the main Sample Display AOUTS CALIBRATED: NO CAL EXIT Press SET> to select the Analog Output channel to be configured.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To select manual output calibration for a particular channel, activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer See Table 3-1 for pin assignments of Analog Out connector on the rear panel V +DC Gnd V OUT + V IN + V OUT - V IN - ANALYZER Figure 6-11: Recording Device Setup for Calibrating Analog Voltage Outputs To make these adjustments, the AOUT auto-calibration feature must be turned off (Section 6.13.4.2). Activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer FROM ANALOG I/O CONFIGURATION MENU DIAG AIO DIAG CONC_OUT_1 RANGE: 5V ANALOG I / O CONFIGURATION EDIT SET> PREV NEXT DIAG AIO DIAG AIO EXIT ENTR EXIT CONC_OUT_1 REC OFS: 0 mV AOUTS CALIBRATED: NO < SET SET> CAL < SET SET> EXIT DIAG AIO Press SET> to select the analog output channel to be configured: DISPLAYED AS= CONC_OUT_1 = CONC_OUT_2 = TEST OUTPUT = DIAG AIO < SET SET> EXIT If AutoCal is ON, go to Section 6.7.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer See Table 3-1 for pin assignments of the Analog Out connector on the rear panel. mA IN OUT V OUT + I IN + V OUT - I IN - Recording Device Analyzer Figure 6-12: Setup for Calibrating Current Outputs NOTE Do not exceed 60 V between current loop outputs and instrument ground. To adjust the zero and span values of the current outputs, activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer FROM ANALOG I/O CONFIGURATION MENU DIAG PREV The instrument attempt to automatically calibrate the channel … then beep. ANALOG I / O CONFIGURATION NEXT ENTR DIAG AIO EXIT DIAG AIO CONC_OUT_2 D/A/ CAL ERROR EXIT AIN CALIBRATED: NO SET> EDIT EXIT DIAG AIO CONC_OUT_2 CURR-Z: 0 mV U100 UP10 UP DOWN DN10 D100 ENTR EXIT Press SET> to select the analog output channel to be configured:.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.4.5. AIN Calibration This is the sub-menu to conduct the analog input calibration. This calibration should only be necessary after major repair such as a replacement of CPU, motherboard or power supplies. Activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.
Operating Instructions DIAG PREV Model GFC7000TA Carbon Dioxide Analyzer ANALOG I / O CONFIGURATION NEXT DIAG AIO < SET SET> DIAG AIO < SET SET> ENTR AOUTS CALIBRATED: NO CAL Press SET> to scroll to the first channel. Continue pressing SET> to view each of 8 channels. EXIT XIN1:1.00,0.00,V,OFF EDIT Press EDIT at any channel to to change Gain, Offset, Units and whether to display the channel in the Test functions (OFF/ON). EXIT DIAG AIO SET> DIAG AIO EXIT XIN1 GAIN:1.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.5. Electric Test The electric test function substitutes simulated signals for CO2 MEAS and CO2 REF, generated by circuitry on the sync/demod board, for the output of the IR photo-detector. While in this mode the user can also view the same test functions viewable from the main SAMPLE display. When the test is running, the concentration reported on the front panel display should be 40.0 ppm. SAMPLE RANGE = 500.000 PPM CO2 =X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.6. Dark Calibration Test The dark calibration test interrupts the signal path between the IR photo-detector and the remainder of the sync/demod board circuitry. This allows the instrument to compensate for any voltage levels inherent in the sync/demod circuitry that might effect the calculation of CO2 concentration.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.7. Pressure Calibration A sensor at the exit of the sample chamber continuously measures the pressure of the sample gas. This data is used to compensate the final CO2 concentration calculation for changes in atmospheric pressure and is stored in the CPU’s memory as the test function PRES (also viewable via the front panel).
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.8. Flow Calibration The flow calibration allows the user to adjust the values of the sample flow rates as they are displayed on the front panel and reported through COM ports to match the actual flow rate measured at the sample inlet. This does not change the hardware measurement of the flow sensors, only the software calculated values.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.13.9. Test Channel Output When activated, output channel A4 can be used to report one of the test functions viewable from the SAMPLE mode display. To activate the A4 channel and select a test function, follow this button sequence: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU Continue to press NEXT until … CFG DAS RNGE PASS CLK MORE SETUP X.X SECONDARY SETUP MENU COMM VARS DIAG SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer * This refers to the internal voltage level of the function NOT the output signal level of the Test channel itself. 6.14. SETUP MORE ALRM: Using the Gas Concentration Alarms The Model GFC 7000TA includes two CO2 concentration alarms. Each alarm has a user settable limit, and is associated with an opto-isolated TTL relay accessible via the status output connector on the instrument’s back panel (See Section 6.15.1.1).
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.14.1. Setting the Concentration Alarm Limits To enable either of the CO2 concentration alarms and set the Limit points, press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP SETUP X.X SETUP X.X ALARM MENU PRIMARY SETUP MENU ALM1 CFG DAS RNGE PASS CLK MORE SETUP X. SETUP X.X EXIT ALM2 EXIT ALARM 1 LIMIT: OFF SECONDARY SETUP MENU OFF COMM VARS DIAG ALRM ENTR EXIT EXIT SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer STATUS Figure 6-13: D + Connect to Internal Ground of Monitoring Device 8 ALARM 2 7 ALARM 1 6 DIAGNOSTIC MODE 5 SPAN CAL 4 ZERO CAL 3 HIGH RANGE 2 CONC VALID SYSTEM OK 1 Status Output Connector Teledyne Analytical Instruments 143
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer The pin assignments for the Status Outputs are: Table 6-24: Status Output Pin Assignments OUTPUT # 1 2 Status Definition SYSTEM OK CONC VALID Condition On if no faults are present. On if CO2 concentration measurement is valid. If the CO2 concentration measurement is invalid, this bit is OFF. 3 HIGH RANGE On if unit is in high range of DUAL or AUTO range modes. 4 ZERO CAL On whenever the instruments zero point is being calibrated.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.1.2. Control Inputs These inputs allow the user to remotely initiate Zero and Span calibrations. Two methods for energizing the inputs is provided below; the first using the internal +5V available on the CONTROL IN connector and the second, if an external, isolated supply is employed. Table 6-25: Control Input Pin Assignments INPUT STATUS A EXTERNAL ZERO CAL Zero calibration mode is activated.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.2. Remote Operation Using the External Serial I/O 6.15.2.1. Terminal Operating Modes The Model GFC 7000TA can be remotely configured, calibrated or queried for stored data through the serial ports. As terminals and computers use different communication schemes, the analyzer supports two communicate modes specifically designed to interface with these two types of devices.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.2.3. Command Syntax Commands are not case-sensitive and all arguments within one command (i.e. ID numbers, keywords, data values, etc.) must be separated with a space character. All Commands follow the syntax: X [ID] COMMAND Where X is the command type (one letter) that defines the type of command. Allowed designators are listed in Table 6-27 and Appendix A-6. [ID] is the analyzer identification number (Section 6.11.1.).
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer followed by zero or more digits, an optional decimal point, and zero or more digits. (At least one digit must appear before or after the decimal point.) Scientific notation is not permitted. For example, +1.0, 1234.5678, -0.1, 1 are all valid floating-point numbers. Boolean expressions are used to specify the value of variables or I/O signals that may assume only two values. They are denoted by the keywords ON and OFF.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Terminal emulation programs such as HyperTerminal can capture these messages to text files for later review.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.2.6. Remote Access by Modem The GFC 7000TA can be connected to a modem for remote access. This requires a cable between the analyzer’s COM port and the modem, typically a DB-9F to DB-25M cable (available from Teledyne Instruments with part number WR0000024). Once the cable has been connected, check to make sure the DTE-DCE is in the correct position.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To initialize the modem press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP SETUP X.X SET> SETUP X.X COM1 MODE:0 EDIT CFG DAS RNGE PASS CLK MORE EXIT SETUP X.X EXIT returns to the previous menu SETUP X.X COM1 BAUD RATE:19200 EDIT EXIT SECONDARY SETUP MENU COMM VARS DIAG ALRM EXIT COM1 MODEM INIT:AT Y &D &H SETUP X.X SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer Where N is any numeral between 0 and 9. 6.15.2.8. APICOM Remote Control Program APICOM is an easy-to-use, yet powerful interface program that allows accessing and controlling any of Teledyne Instruments’ main line of ambient and stack-gas instruments from a remote connection through direct cable, modem or Ethernet.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer APICOM is included free of cost with the analyzer and the latest versions can also be downloaded for free at http://www.teledyne-api.com/software/apicom/. 6.15.3. Additional Communications Documentation Table 6-28: Serial Interface Documents INTERFACE / TOOL APICOM DAS Manual PART NUMBER DOCUMENT TITLE AVAILABLE ONLINE* APICOM User Manual 039450000 YES Detailed description of the DAS.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.4.2. Hessen com Port Configuration Hessen protocol requires the communication parameters of the GFC 7000TA’s com ports to be set differently than the standard configuration as shown in the table below. Table 6-29: RS-232 Communication Parameters for Hessen Protocol Parameter Standard Hessen Data Bits 8 7 Stop Bits 1 2 Parity None Even Duplex Full Half To change the rest of the com port parameters. See Section 6.11.5.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.4.3. Activating Hessen Protocol The first step in configuring the GFC 7000TA to operate over a Hessen protocol network is to activate the Hessen mode for com ports and configure the communication parameters for the port(s) appropriately. Press: SAMPLE* Repeat the entire process to set up the COM2 port RANGE = 500.000 PPM < TST TST > CAL SETUP X.X CO2 =X.XXX SETUP SETUP X.
Operating Instructions SAMPLE* RANGE = 500.000 PPM < TST TST > CAL Model GFC7000TA Carbon Dioxide Analyzer CO2 =X.XXX SETUP SETUP X.X SETUP X.X PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE ID INET COMMUNICATIONS MENU HESN COM2 EXIT EXIT SETUP X. SETUP X.X COM1 HESSEN VARIATION: TYPE 1 SECONDARY SETUP MENU SET> COMM VARS DIAG ALRM EXIT EDIT EXIT ENTR accepts the new settings SETUP X.X HESSEN VARIATION: TYPE 1 ENTR EXIT TYE1 TYPE 2 SETUP X.X Press to change protocol type.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To Select a Hessen response mode, press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP ID INET PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X EXIT ALRM EXIT Press to change response mode. COMMUNICATIONS MENU HESN SETUP X.X SET> SECONDARY SETUP MENU COMM VARS DIAG SETUP X.X COM1 COM2 EXIT HESSEN VARIATION: TYPE 1 EDIT EXIT ENTR accepts the new settings SETUP X.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer 6.15.4.7. Setting Hessen Protocol Status Flags Teledyne Instruments’ implementation of Hessen protocols includes a set of status bits that the instrument includes in responses to inform the host computer of its condition. Each bit can be assigned to one operational and warning message flag.
Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer To assign or reset the status flag bit assignments, press: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.X SECONDARY SETUP MENU COMM VARS DIAG SETUP X.X ID INET EXIT ALRM EXIT COMMUNICATIONS MENU HESN COM1 COM2 EXIT Repeat pressing SET> until … SETUP X. SETUP X.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7. CALIBRATION PROCEDURES This contains a variety of information regarding the various methods for calibrating a Model GFC 7000TA CO2 Analyzer as well as other supporting information. NOTE The procedures in this assume that the calibration password feature is disabled (the instruments default state). If it is enabled a password prompt screen (See Section 6.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.1.2. Calibration Gas Traceability All equipment used to produce calibration gases should be verified against standards of the National Institute for Standards and Technology (NIST). To ensure NIST traceability, we recommend acquiring cylinders of working gas that are certified to be traceable to NIST Standard Reference Materials (SRM). These are available from a variety of commercial sources. 7.1.3.
Calibration Procedures Figure 7-2: Model GFC7000TA Carbon Dioxide Analyzer Pneumatic Connections–Basic Configuration–Using Gas Dilution Calibrator STEP TWO: Set the expected CO2 Span Gas concentration: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL The CO2 span concentration values automatically default to 400.0 Conc. To change this value to the actual concentration of the span gas, enter the number by pressing the button under each digit until the expected value appears.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer STEP THREE: Perform the Zero/Span Calibration Procedure: SAMPLE* RANGE = 500.000 PPM < TST TST > CAL SAMPLE CO2 =XXX.X SETUP STABIL=XXX.X PPM < TST TST > CAL Set the Display to show the STABIL test function. This function calculates the stability of the CO2 measurement CO2 =XXX.X SETUP ACTION: Allow zero gas to enter the sample port at the rear of the instrument. Wait until STABIL falls below 1.0 ppm. M-P CAL STABIL=XXX.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.3. Manual Calibration Checks Informal calibration checks, which only evaluate but do not alter the analyzer’s response curve, are recommended as a regular maintenance item and in order to monitor the analyzer’s performance. To carry out a calibration check rather than a full calibration, follow these steps. STEP ONE: Connect the sources of zero air and span gas as shown in Figures 7.1 or 7.2.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.4. Manual Calibration with Zero/Span Valves There are four different zero/span valve option configurations (See Section 5.4). They all operate identically, differing only in the method used to supply calibration gas to the Analyzer. STEP ONE: Connect the sources of Zero Air and Span Gas as shown below. Figures 7-3 through 7-6 show the proper pneumatic connections for GFC 7000TAs with various optional internal valve sets installed.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer VENT here if input Source of is pressurized SAMPLE GAS Removed during calibration SAMPLE Calibrated CO2 Gas EXHAUST at span gas concentration VENT VENT SPAN Chassis PRESSURE SPAN N2 Figure 7-4: External Zero Air Scrubber IZS PURGE LINE Pneumatic Connections – Ambient Zero/Pressurized Span Valves and External Zero Air Scrubber Figure 7-5: Pneumatic Connections – Ambient Zero/Ambient Span Valves Teledyne Analytical Instruments
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer Source of SAMPLE GAS VENT here if input is pressurized Removed during calibration Calibrated CO2 Gas at 100x span gas concentration Model T700 gas Dilution Calibrator SAMPLE EXHAUST VENT SPAN Chassis PRESSURE SPAN External Zero Air Scrubber IZS PURGE LINE N2 Figure 7-6: Pneumatic Connections – Ambient Zero/Ambient Span Valves with External Zero Air Scrubber Teledyne Analytical Instruments 168
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer STEP TWO: Set the expected CO2 Span Gas concentration: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL CALZ CALS The CO2 span concentration values automatically default to 400.0 Conc . To change this value to the actual concentration of the span gas, enter the number by pressing the button under each digit until the expected value appears. SETUP M-P CAL RANGE = 500.000 PPM < TST TST > ZERO CO2 =X.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer SAMPLE* SAMPLE RANGE = 500.000 PPM CAL CALZ CALS SETUP STABIL=XXX.X PPM < TST TST > CAL CALZ CALS CO2 =XXX.X Set the Display to show the STABIL test function. This function calculates the stability of the COx measurement CO2 =XXX.X SETUP ACTION: Allow zero gas to enter the sample port at the rear of the instrument. Wait until STABIL falls below1.0 ppm. M-P CAL STABIL=XXX.X PPM < TST TST > CAL CALZ M-P CAL STABIL=XXX.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.5. Manual Calibration Checks with Zero/Span Valves Zero and span checks using the VARIOUS zero/span valve options available for the GFC 7000TA are similar to that described in Section 7.3, except that the zero and calibration operations are initiated directly and independently with dedicated buttons CALZ and CALS. To perform a manual calibration check of an analyzer with a valve option installed, use the following method.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.5.1. Zero/Span Calibration on Auto Range or Dual Ranges If the analyzer is being operated in dual range mode or auto range mode, then the high and low ranges must be independently calibrated. When the analyzer is in either dual or auto range modes the user must run a separate calibration procedure for each range.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.5.2. Use of Zero/Span Valves with Remote Contact Closure Contact closures for controlling calibration are located on the rear panel CONTROL IN connector. Instructions for setup and use of these contacts are found in Section 6.15.1.2. When the contacts are closed for at least 5 seconds, the instrument switches into zero or span mode. The remote calibration contact closures may be activated in any order.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer The following example sets Sequence #2 to do a Zero-Span Calibration every other day starting at 1 am on September 4, 2001, lasting 15 minutes, without calibration. This will start ½ hour later each iteration. MODE AND ATTRIBUTE VALUE Sequence 2 COMMENT Define Sequence #2 Mode ZERO-SPAN Timer Enable ON Starting Date Sept.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer To program the Sequence: SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL CALZ CALS SETUP SETUP X.X STARTING TIME:14:15 EDIT SETUP X.X EXIT PRIMARY SETUP MENU CFG ACAL DAS RNGE PASS CLK MORE EXIT SETUP X.X DELTA DAYS: 1 EDIT SETUP X.X EXIT SEQ 1) DISABLED NEXT MODE EXIT SETUP X.X 0 SETUP X.X 0 DELTA DAYS: 1 ENTR EXIT 2 SEQ 2) DISABLED PREV NEXT MODE EXIT SETUP X.
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer 7.6.1. AutoCal with Auto or Dual Reporting Ranges Modes Selected SETUP C.4
Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer The default DAS configuration records all calibration values in channel CALDAT as well as all calibration check (zero and span) values in its internal memory. Up to 200 data points are stored for up 4 years of data (on weekly calibration checks) and a lifetime history of monthly calibrations. Review these data to see if the zero and span responses change over time.
8. MAINTENANCE SCHEDULE & PROCEDURES Predictive diagnostic functions, including data acquisition records, failure warnings and test functions built into the analyzer, allow the user to determine when repairs are necessary without performing painstaking preventative maintenance procedures. There are, however, a minimal number of simple procedures that when performed regularly will ensure that the analyzer continues to operate accurately and reliably over its lifetime.
Maintenance Table 8-1: Model GFC7000TA Carbon Dioxide Analyzer GFC 7000TA Maintenance Schedule ITEM ACTION FREQ CAL CHECK REQ’D.
Maintenance Table 8-2: Model GFC7000TA Carbon Dioxide Analyzer GFC 7000TA Test Function Record FUNCTION STABILITY CO2 MEAS DATE RECORDED OPERATING MODE* ZERO CAL ZERO CAL Zero CAL MR RATIO SPAN CAL PRES SAMPLE SAMPLE After PHT DRIVE SLOPE OFFSET Warm-up SPAN CAL ZERO CAL Teledyne Analytical Instruments 182
Maintenance Model GFC7000TA Carbon Dioxide Analyzer 8.2. Predicting Failures Using the Test Functions The Test Functions can be used to predict failures by looking at how their values change over time. Initially it may be useful to compare the state of these Test Functions to the values recorded on the printed record of the final calibration performed on your instrument at the factory, p/n 04307. Table 9-3 can be used as a basis for taking action as these values change with time.
Maintenance Model GFC7000TA Carbon Dioxide Analyzer 8.3. Maintenance Procedures The following procedures are to be performed periodically as part of the standard maintenance of the Model GFC 7000TA. 8.3.1. Replacing the Sample Particulate Filter The particulate filter should be inspected often for signs of plugging or contamination. We recommend that when you change the filter, handle it and the wetted surfaces of the filter housing as little as possible.
Maintenance Model GFC7000TA Carbon Dioxide Analyzer 8.3.2. Rebuilding the Sample Pump The diaphragm in the sample pump periodically wears out and must be replaced. A sample rebuild kit is available – see Appendix B of this manual for the part number of the pump rebuild kit. Instructions and diagrams are included with the kit. Always perform a Flow and Leak Check after rebuilding the Sample Pump. 8.3.3. Performing Leak Checks Leaks are the most common cause of analyzer malfunction; Section 8.3.3.
Maintenance Model GFC7000TA Carbon Dioxide Analyzer 4. Pressurize the instrument with the leak checker, allowing enough time to fully pressurize the instrument through the critical flow orifice. Check each fitting with soap bubble solution, looking for bubbles. Once the fittings have been wetted with soap solution, do not re-apply vacuum, as it will suck soap solution into the instrument and contaminate it. Do not exceed 15 psi pressure. 5.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9. THEORY OF OPERATION The Model GFC 7000TA Gas Filter Correlation Carbon Dioxide Analyzer is a microprocessor-controlled analyzer that determines the concentration of carbon dioxide (CO2) in a sample gas drawn through the instrument.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer directed through multi-pass cell filled with sample gas. The sample cell uses mirrors at each end to reflect the IR beam back and forth through the sample gas to generate a 2.5 meter absorption path (see Figure 10–1). This length was chosen to give the analyzer maximum sensitivity to fluctuations in CO2 density.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer IR unaffected by N2 in Measurement Cell ΔH IR IS affected by CO2 in Reference Cell IR Source M Photo-Detector R GFC Wheel Figure 9-3: Measurement Fundamentals with GFC Wheel As the GFC wheel spins, the IR light alternately passes through the two cavities. When the beam is exposed to the reference cell, the CO2 in the gas filter wheel strips the beam of most of the IR at 4.3μm.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer IR unaffected by N2 in Measurement Cell of the GFC Wheel and no additional CO 2 in the Sample Chamber CO2 MEAS CO2 REF IR affected by CO2 in Reference Cell with no interfering gas in the Sample Chamber IR shinning through Measurement Cell of the GFC Wheel is reduced by additional CO 2 in the Sample Chamber M/R is reduced IR shining through Reference Cell is also reduced by additional CO 2 in the Sample Chamber, but to a lesser extent Figure
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer M/R is Shifted IR shining through both cells is effected equally by interfering gas in the Sample Chamber Figure 9-5: Effects of Interfering Gas on CO2 MEAS & CO2 REF Thus, the difference in the peak heights and the resulting M/R ratio is only due to CO2 and not to interfering gases. In this way, Gas filter correlation rejects the effects of interfering gases and so that the analyzer responds only to the presence of CO2.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.1.4.1. Ambient CO2 Interference Rejection CO2 absorbs IR light very well. So well that even the narrow volume of ambient air between the IR source and the sample chamber is enough to alter the analyzer’s measured concentration of CO2. Also, ambient air, which averages around 350 ppm to 400 ppm, will vary significantly over the course of the day.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.2. Pneumatic Operation CAUTION It is important that the sample airflow system is both leak tight and not pressurized over ambient pressure. Regular leak checks should be performed on the analyzer as described in the maintenance schedule, Table 9-1. Procedures for correctly performing leak checks can be found in Section 9.3.3. An internal pump evacuates the sample chamber creating a small vacuum that draws sample gas into the analyzer.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer Sample Gas Flow Control SAMPLE PRESSURE SENSOR CO2 FLOW SENSOR Purge Gas Flow Control 9.2.1. Sample Gas Flow Purge Gas Pressure Control Figure 9-7: Internal Pneumatic Flow – Basic Configuration 9.2.2.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer pressure is greater than 2:1, the velocity of the gas through the orifice reaches the speed of sound. As long as that ratio stays at least 2:1 the gas flow rate is unaffected by any fluctuations, surges, or changes in downstream pressure because such variations only travel at the speed of sound themselves and are therefore cancelled out by the sonic shockwave at the downstream exit of the critical flow orifice.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.2.3. Purge Gas Pressure Control In order to ensure that all of the ambient CO2 is purged from the GFC Wheel housing an adequate supply of dried air, scrubbed of CO2 must be supplied to the PURGE AIR inlet at the back of the instrument. The minimum gas pressure of the source of purge air should be 7.5 psig.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3. Electronic Operation 9.3.1. Overview Figure 10-9 shows a block diagram of the major electronic components of the Model GFC 7000TA. The core of the analyzer is a microcomputer/central processing unit (CPU) that controls various internal processes, interprets data, makes calculations, and reports results using specialized firmware developed by Teledyne Instruments.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer Analog Outputs A1 RS232 Male Analog In COM2 Female USB COM port Ethernet Optional 4-20 mA Status Outputs: 1–6 (I2C Bus) Analog Outputs (D/A) USB) Touchscreen Display LVDS transmitter board External Digital I/O) PC 104 CPU Card A/D Converter (V/F) Power-Up Circuit Disk On Module MOTHER BOARD Box Temp Internal Digital I/O Sensor Status & Control BENCH TEMP Flash Chip PC 104 Bus Thermistor Interface SAMPLE TEMP Optional O
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.2. CPU The unit’s CPU card, installed on the motherboard inside the rear panel, is a low power (5 VDC, 720mA max), high performance, Vortex 86SX-based microcomputer running Windows CE. Its operation and assembly conform to the PC/104 specification. Figure 9-10: CPU Board The CPU includes two types of non-volatile data storage: a Disk on Module (DOM) and an embedded flash chip. 9.3.2.1.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.3. Optical Bench & GFC Wheel Electronically, the Model GFC 7000TA’s optical bench, GFC wheel and associated components do more than simply measure the amount of CO2 present in the sample chamber. A variety of other critical functions are performed here as well. 9.3.3.1.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.3.3. GFC Wheel A synchronous AC motor turns the GFC wheel motor. For analyzers operating on 60Hz line power this motor turns at 1800 rpm. For those operating on 50Hz line power the spin rate is 1500 rpm. The actual spin rate is unimportant within a large rate since a phase lock loop circuit is used to generate timing pulses for signal processing.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer Reference Pulses Measurement Pulses IR Beam Pulses Segment Sensor Pulses MR Sensor Pulses Figure 9-12: Segment Sensor and M/R Sensor Output Schmidt Triggers To ensure that the waveforms produced by the Segment Sensor and the M/R Sensor are properly shaped and clean, these signals are passed through a set of Schmidt Triggers circuits. 9.3.3.4.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 56V Bias CO2 MEAS Photodetector Variable Gain Amp Dark Switch Pre Amp Sample & Hold Circuits Signal Conditioner TEC Control PHT DRIVE E-Test Generator CO2 Reference (x4) Signal Amplifiers Conditioner Thermo-Electric Cooler Control Circuit E Test A Gate E Test B Gate Dark Test Gate Compact Programmable Logic Device Measure Gate Measure Dark Gate Reference Gate Reference Dark Gate Phase Lock Warning M/R Sensor Segment Sensor From GF
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer The four sample and hold circuits are: DESIGNATION ACTIVE WHEN: IR BEAM PASSING THROUGH SEGMENT SENSOR PULSE IS: Measure Gate MEASUREMENT cell of GFC Wheel HIGH Measure Dark Gate MEASUREMENT cell of GFC Wheel LOW Reference Gate REFERENCE cell of GFC Wheel HIGH Reference Dark Gate REFERENCE cell of GFC Wheel LOW Timing for activating the Sample and Hold circuits is provided by a phase lock loop circuit (PLL).
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.4.4. Photo-Detector Temperature Control The synch/demod board also contains circuitry that controls the IR photo-detector’s thermoelectric coolers. A drive voltage, PHT DRIVE, is supplied to the coolers by the synch/demod board which is adjusted by the synch/demod board based on a return signal called TEC control which alerts informs the synch/demod board of the detector’s temperature.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.5.3. Zero/Span Valve Options Any zero/span valve options installed in the analyzer are controlled by a set of electronic switches located on the relay board. These switches, under CPU control, supply the +12VDC needed to activate each valve’s solenoid. 9.3.5.4. IR Source The Relay board supplies a constant 11.5VDC to the IR Source. Under normal operation the IR source is always on. 9.3.5.5.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer DC VOLTAGE TEST POINTS STATUS LED’s RELAY PCA Figure 9-15: Location of relay board Status LED’s 9.3.5.6. I2C Watch Dog Circuitry Special circuitry on the relay board monitors the activity on the I2C bus and drives LED D1. Should this LED ever stay ON or OFF for 30 seconds, the watchdog circuit will automatically shut of all valves as well as turn off the IR Source and all heaters.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer The A/D can be configured for several different input modes and ranges but in the GFC 7000TA is used in uni-polar mode with a +5 V full scale. The converter includes a 1% over and under-range. This allows signals from –0.05 V to +5.05 V to be fully converted. For calibration purposes, two reference voltages are supplied to the A/D converter: Reference Ground and +4.096 VDC.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer Box Temperature Sensor A thermistor is attached to the motherboard. It measures the analyzer’s inside temperature. This information is stored by the CPU and can be viewed by the user for troubleshooting purposes via the front panel display (See Section 11.1.2). 9.3.6.4. Analog Outputs The analyzer comes equipped with four analog outputs: A1, A2, A3 and A4. .
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.6.6. External Digital I/O This External Digital I/O performs two functions: status outputs and control inputs. Status Outputs Logic-Level voltages are output through an optically isolated 8-pin connector located on the rear panel of the analyzer. These outputs convey good/bad and on/off information about certain analyzer conditions. They can be used to interface with certain types of programmable devices (See Section 6.13.1.1).
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.3.8. Power Supply/ Circuit Breaker The analyzer operates on 100 VAC, 115 VAC or 230 VAC power at either 50Hz or 60Hz. Individual units are set up at the factory to accept any combination of these five attributes. As illustrated in Figure 10-15, power enters the analyzer through a standard IEC 320 power receptacle located on the rear panel of the instrument.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.4. Front Panel Touchscreen/Display Interface Users can input data and receive information directly through the front panel touchscreen display. The LCD display is controlled directly by the CPU board. The touchscreen is interfaced to the CPU by means of a touchscreen controller that connects to the CPU via the internal USB bus and emulates a computer mouse. Figure 9-17: Front Panel and Display Interface Block Diagram 9.4.1.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.5. Software Operation The Model GFC 7000TA Gas Filter Correlation Carbon Dioxide Analyzer has a high performance, VortexX86-based microcomputer running Windows CE. Inside Windows CE, special software developed by Teledyne Instruments interprets user commands via the various interfaces, performs procedures and tasks, stores data in the CPU’s various memory devices and calculates the concentration of the sample gas.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer includes, by default, the last 48 samples, approximately 10 seconds of data, to allow the analyzer to more quickly respond. If necessary, these boxcar lengths can be changed between 1 and 1000 samples but with corresponding tradeoffs in rise time and signal-to-noise ratio (contact customer service for more information). Two conditions must be simultaneously met to switch to the short filter.
Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer 9.5.4. Temperature and Pressure Compensation Changes in pressure can have a noticeable, effect on the CO2 concentration calculation. To account for this, the Model GFC 7000TA software includes a feature which allows the instrument to compensation of the CO2 calculations based on changes in ambient pressure.
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Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10. TROUBLESHOOTING & REPAIR PROCEDURES This contains a variety of methods for identifying the source of performance problems with the analyzer. Also included in this are procedures that are used in repairing the instrument. CAUTION The operations outlined in this section are to be performed by qualified maintenance personnel only. CAUTION Risk of electrical shock. Disconnect power before performing the following operations. 10.1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.1.1. Interpreting WARNING Messages The most common and/or serious instrument failures will result in a warning message being displayed on the front panel. Table 11-1 lists warning messages, along with their meaning and recommended corrective action.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer To view or clear the various warning messages press: TEST deactivates Warning Messages until New warning(s) are activated SAMPLE TEST SAMPLE WHEEL TEMP WARNING CAL RANGE=500.00 PPM < TST TST > CAL SAMPLE MSG MSG WHEEL TEMP WARNING < TST TST > CAL MSG CO2 = XX.XX CLR SETUP CO2 = XX.XX CLR SETUP CO2 = XX.XX CLR SETUP Make sure warning messages are not due to legitimate problems.. Figure 10-1: MSG activates Warning Messages.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer Table 10-1: Warning Messages - Indicated Failures WARNING MESSAGE FAULT CONDITION BENCH TEMP WARNING The optical bench temp is ° controlled at 48 2 C. BOX TEMP WARNING Box Temp is ° ° < 5 C or > 48 C. CANNOT DYN SPAN CANNOT DYN ZERO CONFIG INITIALIZED Dynamic Span operation failed Dynamic Zero operation failed CONC ALRM2 WARNING Configuration and Calibration data reset to original Factory state.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer Table 11-1: Warning Messages – Indicated Failures (cont.) WARNING MESSAGE SAMPLE TEMP WARN SOURCE WARNING FAULT CONDITION POSSIBLE CAUSES o Sample temperature is < 10 C or > o 100 C.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer Table 10-2: Test Functions - Indicated Failures TEST FUNCTIONS TIME RANGE STABIL CO2 MEAS & CO2 REF MR RATIO PRES SAMPLE FL SAMPLE TEMP BENCH TEMP WHEEL TEMP BOX TEMP PHT DRIVE INDICATED FAILURE(S) Time of day clock is too fast or slow: To adjust See Section 6.6. Battery in clock chip on CPU board may be dead.
Troubleshooting TEST FUNCTIONS SLOPE OFFSET Model GFC7000TA Carbon Dioxide Analyzer INDICATED FAILURE(S) Values outside range indicate Contamination of the zero air or span gas supply Instrument is miss-calibrated Blocked gas flow Contaminated or leaking GFC wheel (either chamber) Faulty IR photo-detector Faulty sample faulty IR photo-detector pressure sensor (P1) or circuitry Invalid M/R ratio (see above) Bad/incorrect span gas concentration due.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX < TST TST > CAL SETUP X.X SETUP PRIMARY SETUP MENU CFG DAS RNGE PASS CLK MORE SETUP X.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer seconds, DS5 should flash on and off. If characters are written to the front panel display but DS5 does not flash then the program files have become corrupted. If after 30 – 60 seconds neither the DS5 is flashing or no characters have been written to the front panel display then the CPU is bad and must be replaced. Motherboard CPU Status LED Figure 10-3: CPU Status Indicator 10.1.4.2.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer D1 – M/R Sensor Status JP4 Connector to Opto-Pickup Board D2 – Segment Sensor Status Figure 10-4: Sync/Demod Board Status LED Locations 10.1.4.3. Relay Board Status LEDs There are eight LEDs located on the Relay Board. The most important of which is D1 is the most important LED, which indicates the health of the I2C bus.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer Table 10-5: Relay Board Status LED Failure Indications LED FUNCTION SIGNAL I/O PARAMETER ACTIVATED BY DIAGNOSTIC TECHNIQUE VIEW RESULT D2 Yellow WHEEL HEATER WHEEL_HEATER WHEEL_TEMP D3 Yellow BENCH HEATER BENCH_HEATER BENCH_TEMP D4 Yellow SPARE N/A N/A D5 Green SAMPLE/CAL GAS VALVE OPTION CAL_VALVE N/A D6 Green ZERO/SPAN GAS VALVE OPTION SPAN_VALVE N/A D7 Green SHUTOFF VALVE OPTION SHUTOFF_VALVE N/A D8 Green IR SOURCE I
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.2. Gas Flow Problems The GFC 7000TA has two main gas flow path, the sample gas flow path and the GFC purge gas flow path. Both are controlled by a critical flow orifice. Only the sample gas path is measured and reported. When the IZS or zero/span valve options are installed, there are several subsidiary paths but none of those are displayed on the front panel or stored by the DAS.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer GFC Motor Heat Sync GFC Wheel Housing Purge Gas Flow Control SAMPLE CHAMBER 10.2.1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer SAMPLE GAS INLET Shutoff Valve Sample / Cal Valve IZS INLET EXHAUST GAS OUTLET PUMP External CO2 Scrubber Sample Gas Flow Control Flow / Pressure Sensor PCA SAMPLE PRESSURE SENSOR GFC Motor Heat Sync Zero / Span Valve Purge Gas Flow Control SAMPLE CHAMBER VENT SPAN OUTLET GFC Wheel Housing PRESSURE SPAN INLET CO2 FLOW SENSOR PURGE GAS INLET Purge Gas Pressure Control Figure 10-7: Internal Pneumatic Flow – Ambient Zero/Pressurized
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer SAMPLE GAS INLET Sample / Cal Valve IZS INLET EXHAUST GAS OUTLET PUMP External CO2 Scrubber Sample Gas Flow Control Flow / Pressure Sensor PCA SAMPLE PRESSURE SENSOR GFC Motor Heat Sync Zero / Span Valve Purge Gas Flow Control SAMPLE CHAMBER VENT SPAN OUTLET GFC Wheel Housing PRESSURE SPAN INLET NO2 FLOW SENSOR PURGE GAS INLET Purge Gas Pressure Control Figure 10-8: Internal Pneumatic Flow – Ambient Zero/Ambient Span Teledyne Ana
Troubleshooting Figure 10-9: Model GFC7000TA Carbon Dioxide Analyzer GFC 7000TA – Internal Pneumatics with O2 Sensor Option 65A 10.2.2. Typical Sample Gas Flow Problems 10.2.2.1. Flow is Zero The unit displays a SAMPLE FLOW warning message on the front panel display or the SAMPLE FLOW test function reports a zero or very low flow rate. Confirm that the sample pump is operating (turning). If not, use an AC voltmeter to make sure that power is being supplied to the pump.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer Place a finger over an Exhaust outlet on the rear panel of the instrument. If gas is flowing through the analyzer, you will feel pulses of air being expelled from the Exhaust outlet. 4. If gas flows through the instrument when it is disconnected from its sources of zero air, span gas or sample gas, the flow problem is most likely not internal to the analyzer.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer If the sample pressure is reading normal but the sample flow is reading low then it is likely that the pump diaphragm is worn or there is an obstruction downstream of the flow sensor. 10.2.2.5. Actual Flow Does Not Match Displayed Flow If the actual flow measured does not match the displayed flow, but is within the limits of 720-880 cc/min, adjust the calibration of the flow measurement as described in Section 6.9.8. 10.2.2.6.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.3. Calibration Problems 10.3.1. Miscalibrated There are several symptoms that can be caused by the analyzer being miss-calibrated. This condition is indicated by out of range Slopes and Offsets as displayed through the test functions and is frequently caused by the following: 1. BAD SPAN GAS. This can cause a large error in the slope and a small error in the offset. Delivered from the factory, the GFC 7000TA’s slope is within ±15% of nominal.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.3.2. Non-Repeatable Zero and Span As stated earlier, leaks both in the GFC 7000TA and in the external system are a common source of unstable and non-repeatable readings. 1. Check for leaks in the pneumatic systems as described in Section 9.3.3. Don’t forget to consider pneumatic components in the gas delivery system outside the GFC 7000TA.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.3.4. Inability to Zero – Touchscreen ZERO Button Not Visible 1. Confirm that there is a good source of zero air. Dilute a tank of span gas with the same amount of zero air from two different sources. If the CO2 Concentration of the two measurements is different, there is a problem with one of the sources of zero air. 2. Check for leaks in the pneumatic systems as described in Section 9.3.3. 3.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.4. Other Performance Problems Dynamic problems (i.e. problems which only manifest themselves when the analyzer is monitoring sample gas) can be the most difficult and time consuming to isolate and resolve. The following provides an itemized list of the most common dynamic problems with recommended troubleshooting checks and corrective actions. 10.4.1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 3. If the relay has failed there should be no change in the voltage across pins 2 and 4 or 3 and 4. NOTE: K2 is in a socket for easy replacement. 4. If K2 checks out OK, the thermistor temperature sensor located on the optical bench near the front of the instrument could be at fault. Unplug the connector labeled “Bench”, and measure the resistance of the thermistor.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.4.2. Excessive Noise Noise is continuously monitored in the TEST functions as the STABIL reading and only becomes meaningful after sampling a constant gas concentration for at least 10 minutes. Compare the current STABIL reading with that recorded at the time of manufacture (included in the GFC 7000TA Final Test and Validation Data Sheet-p/n 04271 shipped with the unit from Teledyne Instruments). 1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.5. Subsystem Checkout The preceding s of this manual discussed a variety of methods for identifying possible sources of failures or performance problems within the analyzer. In most cases this included a list of possible causes. This describes how to determine individually determine if a certain component or subsystem is actually the cause of the problem being investigated. 10.5.1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer A voltmeter should be used to verify that the DC voltages are correct per the values in the table below, and an oscilloscope, in AC mode, with band limiting turned on, can be used to evaluate if the supplies are producing excessive noise (> 100 mV p-p). Table 10-7: DC Power Supply Acceptable Levels CHECK RELAY BOARD TEST POINTS POWER SUPPLY ASSY VOLTAG E PS1 MIN V MAX V 2 4.8 5.25 +15 4 13.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.5.6. Relay Board The relay board PCA (04135) can be most easily checked by observing the condition of the its status LEDs on the relay board, as described in Section 10.1.4.3, and the associated output when toggled on and off through signal I/O function in the diagnostic menu, See Section 10.1.3. 1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer If they are not then either the sync demodulator board or the IR-photodetector are bad. See Section 10.4.1.4 for problems with the IR-photodetector TEC drive. 10.5.7.2. Opto Pickup Assembly Operation of the opto pickup PCA (04088) can be verified with a voltmeter. Measure the AC and DC voltage between digital ground on the relay board, or touchscreen and TP1 and TP2 on the sync pickup PCA.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 3. If the drive voltage is correct in step 2, then remove the source from the heat sink assembly (2 screws on top) and connect to its mating connector. Observe the light being emitted from the source. It should be centered at the bottom of the U-shaped element. If there is either no emission or a badly centered emission then the source is bad. 10.5.7.5.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.5.8.2. Analog Outputs: Voltage To verify that the analog outputs are working properly, connect a voltmeter to the output in question and perform an analog output step test as described in Section 6.9.3. For each of the steps, taking into account any offset that may have been programmed into channel (See Section 6.9.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer Table 10-10: Analog Output Test Function - Nominal Values Voltage Outputs FULL SCALE OUTPUT VOLTAGE 100MV 1V 5V 10V STEP % 1 0 0 NOMINAL OUTPUT VOLTAGE 0 0 0 2 20 20 mV 0.2 1 2 3 40 40 mV 0.4 2 4 4 60 60 mV 0.6 3 6 5 80 80 mV 0.8 4 8 6 100 100 mV 1.0 5 10 10.5.8.3.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.5.8.4. Status Outputs The procedure below can be used to test the Status outputs: 1. Connect a jumper between the “D“ pin and the “” pin on the status output connector. 2. Connect a 1000 ohm resistor between the “+” pin and the pin for the status output that is being tested. 3. Connect a voltmeter between the “” pin and the pin of the output being tested (see table below). Under the DIAG SIGNAL I/O menu (See Section 10.1.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.5.9. CPU There are two major types of failures associated with the CPU board: complete failure and a failure associated with the Disk on Module (DOM). If either of these failures occur, contact the factory. For complete failures, assuming that the power supplies are operating properly and the wiring is intact, the CPU is faulty if on power-on, the watchdog LED on the motherboard is not flashing.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.5.10.2. Troubleshooting Analyzer/Modem or Terminal Operation These are the general steps for troubleshooting problems with a modem connected to a Teledyne Instruments analyzer. 1. Check cables for proper connection to the modem, terminal or computer. 2. Check to make sure the DTE-DCE is in the correct position as described in Section 6.10.5. 3. Check to make sure the set up command is correct (See Section 6.13.2.7) 4.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.6. Repair Procedures This contains procedures that might need to be performed on rare occasions when a major component of the analyzer requires repair or replacement. 10.6.1. Repairing Sample Flow Control Assembly The critical flow orifice is housed in the flow control assembly (Teledyne Instruments part number: 001760400) located on the top of the optical bench.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 10.6.2. Removing/Replacing the GFC Wheel When removing or replacing the GFC Wheel it is important to perform the disassembly in the following order to avoid damaging the components: 1. Turn off the analyzer. 2. Remove the top cover as described in “Getting Started” Section 3.1. 3. Open the instrument’s hinged front panel. 4. Locate the GFC wheel/motor assembly (see Figure 3-3). 5.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 11. Remove the one (1) screw fastening the GFC wheel/mask assembly to the GFC motor hub. 11 12 Figure 10-12: Removing the GFC Wheel 12. Remove the GFC wheel/mask assembly. 13. Follow the previous steps in reverse order to put the GFC wheel/motor assembly back together. 10.6.3. Disk-On-Module Replacement Procedure NOTE Servicing of circuit components requires electrostatic discharge protection, i.e. ESD grounding straps, mats and containers.
Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer 6. Install the new Disk-on-Module, making sure the notch at the end of the chip matches the notch in the socket. 7. It may be necessary to straighten the pins somewhat to fit them into the socket. Press the chip all the way in. 8. Close the rear panel and turn on power to the machine. 9. If the replacement DOM carries a firmware revision, re-enter all of the setup information.
ESD Model GFC7000TA Carbon Dioxide Analyzer 11. A PRIMER ON ELECTRO-STATIC DISCHARGE Teledyne Instruments considers the prevention of damage caused by the discharge of static electricity to be extremely important part of making sure that your analyzer continues to provide reliable service for a long time. This section describes how static electricity occurs, why it is so dangerous to electronic components and assemblies as well as how to prevent that damage from occurring. 11.1.
ESD Model GFC7000TA Carbon Dioxide Analyzer Poly bag picked up from bench 1,200V 20,000V Moving around in a chair padded with urethane foam 1,500V 18,000V 11.2. How Electro-Static Charges Cause Damage Damage to components occurs when these static charges come into contact with an electronic device.
ESD Model GFC7000TA Carbon Dioxide Analyzer Whenever a sensitive device is moved into the field of an existing electro-static field, a charge may be induced on the device in effect discharging the field onto the device. If the device is then momentarily grounded while within the electrostatic field or removed from the region of the electrostatic field and grounded somewhere else, a second discharge will occur as the charge is transferred from the device to ground. 11.3.
ESD Model GFC7000TA Carbon Dioxide Analyzer P r o t e c t iv e M a t W r is t S t r a p G r o u n d P o in t Figure 11-2: Basic anti-ESD Work Station For technicians that work in the field, special lightweight and portable anti-ESD kits are available from most suppliers of ESD protection gear. These include everything needed to create a temporary anti-ESD work area anywhere. Always wear an Anti-ESD wrist strap when working on the electronic assemblies of your analyzer.
ESD Model GFC7000TA Carbon Dioxide Analyzer 11.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance 11.4.2.1. Working at the Instrument Rack When working on the analyzer while it is in the instrument rack and plugged into a properly grounded power supply. 1. Attach your anti-ESD wrist strap to ground before doing anything else. Use a wrist strap terminated with an alligator clip and attach it to a bare metal portion of the instrument chassis.
ESD Model GFC7000TA Carbon Dioxide Analyzer 11.4.2.3. Transferring Components from Rack to Bench and Back When transferring a sensitive device from an installed Teledyne Instruments analyzer to an Anti-ESD workbench or back: 1. Follow the instructions listed above for working at the instrument rack and workstation. 2. Never carry the component or assembly without placing it in an anti-ESD bag or bin. 3.
ESD Model GFC7000TA Carbon Dioxide Analyzer 11.4.2.5. Packing Components for Return to Teledyne Instruments Customer Service. Always pack electronic components and assemblies to be sent to Teledyne Instruments Customer Service in anti-ESD bins, tubes or bags. WARNING DO NOT use pink-poly bags.
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