OPERATING INSTRUCTIONS FOR Model 3300TB Trace Oxygen Analyzer DANGER HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM. PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM. HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED. ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING.
Copyright © 1999 Teledyne Analytical Instruments All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language or computer language in whole or in part, in any form or by any means, whether it be electronic, mechanical, magnetic, optical, manual, or otherwise, without the prior written consent of Teledyne Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-1580.
Contents Introduction 1.1 1.2 1.3 1.4 Overview ........................................................................ Main Features of the Analyzer ....................................... Front Panel Description .................................................. Rear Panel Description .................................................. 1-1 1-1 1-2 1-3 Operational Theory 2.1 Introduction .................................................................... 2-1 2.2 Micro-Fuel Cell Sensor ..................
.4.1 Alarm 1 .................................................................. 4-3 4.4.2 Alarm 2 .................................................................. 4-3 4.4.3 Sensor Fail Alarm .................................................. 4-4 4.5 Selecting a Fixed Range or Autoranging ....................... 4-4 4.6 Calibration ..................................................................... 4-4 Maintenance 5.1 Replacing the Fuse ........................................................ 5-1 5.
Model 3300TB complies with all of the requirements of the Commonwealth of Europe (CE) for Radio Frequency Interference, Electromagnetic Interference (RFI/EMI), and Low Voltage Directive (LVD).
DANGER COMBUSTIBLE GAS USAGE WARNING This is a general purpose instrument, the Control Unit is designed for usage in a nonhazardous area. It is the customer's responsibility to ensure safety especially when combustible gases are being analyzed since the potential of gas leaks always exist. The customer should ensure that the principles of operating of this equipment is well understood by the user.
Trace Oxygen Analyzer Introduction 1 Introduction 1.1 Overview The Teledyne Electronic Technologies Analytical Instruments (TET/AI) Model 3300TB is a microprocessor-based trace oxygen analyzer for real-time measurement of the parts per million of oxygen in inert gases, or in a wide variety of gas mixtures. It features simple operation, fast response, and a compact, rugged construction. Typical applications of the Model 3300TB are monitoring nitrogen generators and inert gas blanketing applications. 1.
1 Introduction • • • • Model 3300TB Three analog outputs: two for measurement (0–10 V dc, and negative ground 4–20 mA dc) and one for range identification (0-10 V dc). Compact and rugged Control Unit, wall mounted NEMA-4 rated enclosure. RS-232 Serial Digital port for output of concentration and data to a computer terminals, or other digital devices. A Sample flow control valve. 1.3 Front Panel Description All controls except the power switch are accessible from the door and gas panel.
Trace Oxygen Analyzer • Introduction 1 Set HI Range Set the high analysis range for the instrument (up to 0-9999ppm). • Set LO Range Set the low analysis range for the instrument (down to 0-10ppm). • Span Span calibrate the analyzer. Data Entry Keys: Two pushbutton membrane switches are used to manually change measurement parameters of the instrument as they are displayed on the LED meter readout: • Up Arrow Increment values of parameters upwards as they are displayed on the LED readout.
1 Introduction 1-4 Model 3300TB • Power Connection • Analog Outputs • Alarm Connections • Sensor Connector • RS-232 Port AC version: 100–240 VAC, at 50/60Hz. The connector housing includes the fuse holder and the power switch. Fuse Holder: Replacing the fuse is described in Chapter 5, Maintenance. I/O Power Switch: Turns the instrument power ON (1) or OFF (0). 0–10 V dc concentration output. 0–10 V dc range ID (or optional overrange) output. 4–20 mA dc concentration output, negative ground.
Trace Oxygen Analyzer Operational Theory 2 Operational Theory 2.1 Introduction The analyzer is composed of two subsystems: 1. Analysis Unit with Micro-Fuel Cell Sensor 2. Control Unit with Signal Processing, Display and Controls The Analysis Unit is designed to accept the sample gas and direct it to the sensitive surface of the Micro-Fuel Cell sensor. The Micro-Fuel Cell is an electrochemical galvanic device that translates the amount of oxygen present in the sample into an electrical current.
2 Operational Theory Model 3300TB Micro-Fuel Cell is therefore a hybrid between a battery and a true fuel cell. (All of the reactants are stored externally in a true fuel cell.) 2.2.2 Anatomy of a Micro-Fuel Cell The Micro-Fuel Cell is made of extremely inert plastic (which can be placed confidently in practically any environment or sample stream). It is effectively sealed, though one end is permeable to oxygen in the sample gas.
Trace Oxygen Analyzer Operational Theory 2 conductor connecting them, through some electrical circuitry, to one of the external contacts in the connector receptacle, which is on the top of the cell. 2.2.3 Electrochemical Reactions The sample gas diffuses through the Teflon membrane.
2 Operational Theory Model 3300TB external current, will increase, even though the proportion of oxygen has not changed. Fortunately, Dalton's Law confirms that every gas in a mixture contributes the same pressure to the mixture that it would exert if it were alone in the same amount in that same volume. This means that as long as the total pressure of the sample remains constant, the mixture can change, but the diffusion of the oxygen will be affected only by the concentration of the oxygen.
Trace Oxygen Analyzer 2.3 Operational Theory 2 Electronics 2.3.1 General The signal processing uses an Intel microcontroller with on-board RAM and ROM to control all signal processing, input/output, and display functions for the analyzer. System power is supplied from a universal power supply module designed to be compatible with most international power sources. The power supply circuitry is on the Power Supply PCB, which is mounted vertically, just behind the rear panel of the Control Unit.
2 Operational Theory Model 3300TB In the presence of oxygen the cell generates a current. The sensor has an internal thermistor compensation network. The output of the sensor is converted to voltage millivolt range. This output is fed to a voltage amplifier. The internal thermistor network provides temperature compensation of the sensor output. The resistance of the network changes with temperature, compensating for the changes of the microfuel cell output to temperature.
Trace Oxygen Analyzer Installation 3 Installation Installation of the analyzer includes: 1. Unpacking the system. 2. Mounting the Control Unit to a wall 3. Installing the Micro-Fuel Cell 4. Making the electrical connections. 5. Making the gas connections. 6. Testing the installation. CAUTIONS: Read this chapter in its entirety before installing the units. The Sample must be free of entrained solids or water.
3 Installation 3.2 Model 3300TB Location and Mounting 3.2.1 Control Unit Installation The 3300TB Control Unit is designed to be wall-mounted, in a general purpose, area. The unit should be installed at viewing level in a sheltered area. Refer to the Outline diagram D-70361 for the physical dimensions of the analyzer. 3.2.2 Installing the Micro-Fuel Cell / Cell Block Orientation A Micro-Fuel Cell is included as a separate item. It must be installed prior to instrument use.
Trace Oxygen Analyzer 3.3 Installation 3 Electrical Connections Figure 3-1 shows the Model 3300TB rear panel of the control unit. For detailed pinouts, see the wiring/interconnection drawings in the Drawings section at the rear of this manual. To gain access to the terminal blocks, the analyzer door screws must be lossened, and the door opened. Figure 3-1 Electrical Connectors for AC Control Unit Primary Input Power: The power strip supplied inside the analyzer.
3 Installation Model 3300TB Analog Outputs: There are three DC output signal connectors with screw terminals on the panel. There are two wires per output with the polarity noted. See Figure 3-3. The outputs are: 0–10 V % Range: Voltage rises with increasing oxygen concentration, from 0 V at 0 percent oxygen to 10 V at full scale percent oxygen. (Full scale = 100% of programmed range.) 0–10 V Range ID: 03.33 V = Low Range, 06.66 V = High Range, 10 V = Air Cal Range.
Trace Oxygen Analyzer Installation 3 The specific descriptions for each type of alarm are as follows: Alarm #1 Programmable as high or low alarm (actuates when concentration is above threshold). Can be set anywhere between 0 and 9999ppm, but must be set ABOVE the threshold set for the LO Alarm. Alarm #2 Programmable as high or low alarm (actuates when concentration is below threshold). Can be set anywhere from 0 to 9999ppm.
3 Installation Model 3300TB 3.4.1 Vacuum Service Option For vacuum service pluming reference figure 3-4. The vacuum service option is recommended for applications in which the sample source is not pressurized. The customer must supply a pump and by-pass system to complete the sample system. The sample inlet and outlet pressure must be maintained at a constant pressure for proper performance.
Trace Oxygen Analyzer 3.5 Installation 3 Installation Checklist Before connecting the instrument to the power source and turning it on, make sure you have: • Correctly installed the Sample and Exhaust gas lines • Checked for leaks • Set the sample pressure to 5–10 psig (34.5 - 68.9 kPa), nominal (for non-vacuum service units) • Set the flow Once the above checks have been made, you can connect to the power source. The instrument is now ready for operation.
3 Installation 3-8 Model 3300TB Teledyne Analytical Instruments
Trace Oxygen Analyzer Operation 4 Operation 4.1 Introduction Once the analyzer has been mounted, the gas lines connected and the electrical connections made, the Analyzer can be configured for your application. This involves setting the system parameters: • Defining the user selectable analysis ranges. • Setting alarm setpoints. • Calibrating the instrument. All of these functions are performed via the front panel controls, shown in Figure 4-1.
4 Operation 4.2 Model 3300TB Using the Function and Data Entry Buttons When no buttons on the Analyzer are being pressed, the instrument is in the Analyze mode. It is monitoring the anount of oxygen in the sample gas that is flowing through the sampling system. When one of the Function Buttons is being pressed, the Analyzer is in the Setup mode or the Calibration mode.
Trace Oxygen Analyzer Operation 4 4.3.1 HI Range Setting the HI Range fullscale value defines the LEAST sensitive analysis range to be used. To set the HI Range: 1. Press the SET HI RANGE Function button once. 2. Immediately (within 5 seconds) press either the ∆ or ∇ button to raise or lower the displayed value, as required, until the display reads the desired fullscale percent concentration. 4.3.2 LO Range Setting the LO Range fullscale value defines the MOST sensitive range to be used.
4 Operation Model 3300TB until the display reads the desired percent concentration. (if within 5 seconds no key is pressed, the instrument will return to the sample mode and display oxygen concentration). After setting the value wait for the unit to time out of this mode (approximately 5 seconds) and return to displaying oxygen concentration. 4.4.2 Set Alarm 2 Alarm 2 can be set either as a high or low alarm. To configure this alarm to your preferences: 1. Press the SET ALARM 2 function button once. 2.
Trace Oxygen Analyzer 4.5 Operation 4 Selecting a Fixed Range or Autoranging The Model 3300TB can operate in fixed high, fixed low, or autoranging mode. To change modes: 1. Press and then release the SET HI RANGE and the SET LO RANGE buttons simultaneously. 2. Within 5 seconds, press either the ∆ or ∇ button until Auto, Lo, or Hi displays on the LCD, as desired. After about three seconds, the analyzer resumes monitoring in the selected range mode.
4 Operation 4.7 Model 3300TB Displaying Percent & PPM on the LED Display The analyzer displays the concentration in percent whenever the reading is over 9999 ppm. When the reading changes to percent, the LED display will alternate between flashing “PC” and the oxygen concentration. On the other hand, if the instrument is displaying ppm, only the concentration reading will be shown.
Trace Oxygen Analyzer Maintenance 5 Maintenance Aside from normal cleaning and checking for leaks at the gas connections, the Model 3300TB should not require any maintenance beyond replacement of expended Micro-Fuel Cells, and perhaps a blown fuse. Routine maintenance includes occasional recalibration, as described in chapter 4, Operation. 5.1 Replacing the Fuse Remove Power to Unit before replacing the fuse.
5 Maintenance Model 3300TB fuse holder will slide out. There are two fuses in use and are visible in the clip. 4. Remove the bad fuse and replace it with a 5x20mm 0.5 A, 250 VAC, IEC time lag (T) fuse (P/N F1128). 5. Replace the fuse holder into its receptacle, pushing in firmly until it clicks. 5.2 Sensor Installation or Replacement 5.2.1 When to Replace a Sensor On the trace analyzers, the Micro-fuel Cell will typically fail due to excessive zero offset caused by loss of water.
Trace Oxygen Analyzer Maintenance 5 WARNING: THE SENSOR USED IN THE MODEL 3300TB CONTAINS AN ELECTROLYTE WHICH INCLUDES SUBSTANCES THAT ARE EXTREMELY HARMFUL IF TOUCHED, SWALLOWED, OR INHALED. AVOID CONTACT WITH ANY FLUID OR POWDER IN OR AROUND THE UNIT. WHAT MAY APPEAR TO BE PLAIN WATER COULD CONTAIN ONE OF THESE TOXIC SUBSTANCES. IN CASE OF EYE CONTACT, IMMEDIATELY FLUSH EYES WITH WATER FOR AT LEAST 15 MINUTES. CALL A PHYSICIAN. (SEE APPENDIX, Material Safety Data Sheet—MSDS). 5.2.
5 Maintenance Model 3300TB 4. Slowly withdraw the cap from the block. The cell should come out with the cap. 5. Carefully pull the cell off of the cap. DO NOT TOUCH THE SCREENED END OF THE CELL OR ANY FLUID THAT MAY BE LEAKING FROM IT. 6. Dispose of the cell in a safe manner, in accordance with all applicable ENVIRONMENTAL AND SAFETY laws. 5.2.4 Installing a Micro-Fuel Cell To install a new Micro-Fuel Cell: CAUTION: Do not scratch, puncture, or otherwise damage the sensing membrane of the Micro-Fuel Cell.
Trace Oxygen Analyzer Maintenance 5 If you have a warranty claim, you must return the cell in question to the factory for evaluation. If it is determined that failure is due to faulty workmanship or material, the cell will be replaced at no cost to you. Note: Evidence of damage due to tampering or mishandling will render the cell warranty null and void.
5 Maintenance 5-6 Model 3300TB Teledyne Analytical Instruments
Trace Oxygen Analyzer Appendix Appendix A.1 Specifications Ranges: Signal Output: Range ID: Display: Alarms: System Operating Temp: Accuracy: Response Time: System Power Requirement: System Enclosure: Two user selectable ranges can be set between 0-10 ppm and 0-9999 ppm oxygen, and a 0-25 % (nominal) Air Calibration Range. Voltage: 0–10 V dc, negative ground Current: 4-20 mA, negative ground 0-10 V dc. Light emitting diode (LED) display.
Appendix Model 3300TB A.2 Spare Parts List QTY 1 1 1 2 P/N DESCRIPTION C-65220-A PC Board, Main C-64586 PC Board, Power Supply C-6689-B-2C Micro-Fuel Cell, class B-2C F-1130 Fuse (AC), ½A, 250 VAC Type "T" (IEC), 5 x 20mm IMPORTANT: Orders for replacement parts should include the part number and the model and serial number of the system for which the parts are intended.
Trace Oxygen Analyzer Appendix A.3 Reference Drawing D-70361 Outline Diagram D-70362 Final Assembly A.4 Miscellaneous The symbol: ~ is used on the rear panel of the model 3300TB to signify volts alternating current (VAC). NOTE: The MSDS on this material is available upon request through the Teledyne Environmental, Health and Safety Coordinator.
Appendix A-4 Model 3300TB Teledyne Analytical Instruments
Trace Oxygen Analyzer A.5 Appendix Material Safety Data Sheet Section I – Product Identification Product Name: Manufacturer: Address: Phone: Technical Support: Environment, Health and Safety: Date Prepared : Micro-Fuel Cells Mini-Micro-Fuel Cells, all classes Super Cells, all classes except T–5F Electrochemical Oxygen Sensors, all classes.
Appendix Model 3300TB Section III – Physical Hazards Potential for fire and explosion: The electrolyte in the Micro-Fuel Cells is not flammable. There are no fire or explosion hazards associated with Micro-Fuel Cells. Potential for reactivity: The sensors are stable under normal conditions of use. Avoid contact between the sensor electrolyte and strong acids.
Trace Oxygen Analyzer Appendix Section V – Emergency and First Aid Procedures Eye Contact: Skin Contact: Ingestion: Inhalation: Flush eyes with water for at least 15 minutes and get immediate medical attention. Wash affected area with plenty of water and remove contaminated clothing. If burning persists, seek medical attention. Give plenty of cold water. Do not induce vomiting. Seek medical attention. Do not administer liquids to an unconscious person. Liquid inhalation is unlikely.
