INSTRUCTION 2772-0803 REMOTE INTELLIGENT SENSOR AREA MONITOR Installation/Operation/Maintenance Rev. 14 – February 2004 (CN #3252) ® 251 Welsh Pool Road Exton, PA 19341 Ph: 610-363-5450 • Fax: 610-363-0167 Website: www.scottinstruments.com • www.bacharach-inc.com Printed in U.S.A.
Declaration of Conformity Manufacturer's Name: SCOTT INSTRUMENTS Manufacturer's Address: 251 Welsh Pool Road Exton, PA 19341 USA Product Name: Remote Intelligent Sensor Conforms to the following product specifications EMC: A European Directive 89/336/EEC EN 500081-1 (Emissions) EN 500082-1 (Immunity)
REMOTE INTELLIGENT SENSOR - AREA MONITOR CONTENTS Page # FEATURES .................................................................................................................................... v PRODUCT SPECIFICATION ........................................................................................................... vi RIS CATALOG NUMBERS & DATA ............................................................................................. viii 1 INTRODUCTION ...................................
REMOTE INTELLIGENT SENSOR - AREA MONITOR CONTENTS (continued) 2.8 SYSTEM CHECK ....................................................................................................................... 2-4 2.8.1 TAPE CASSETTE LOADING ..................................................................................... 2-4 2.8.2 CHECK AND ADJUST SYSTEM PARAMETERS .................................................... 2-5 2.8.2.1 V, System Voltage ..................................................................
REMOTE INTELLIGENT SENSOR - AREA MONITOR CONTENTS (continued) 3.13 OPTIONAL FEATURES ......................................................................................................... 3-4 3.13.1 RELAY ALARM OPTION ............................................................................................ 3-4 3.13.2 PRINTER INTERFACE OPTION .............................................................................. 3-4 3.13.3 TEST CARD .............................................................
REMOTE INTELLIGENT SENSOR - AREA MONITOR CONTENTS (continued) 4.12 4.13 4.14 4.15 4.16 4.17 4.18 4.19 4.20 4.21 4.22 4.23 4.24 5 EXTERIOR CLEANING ................................................................................................. 4-6 KEY PARAMETER CHECKS ......................................................................................... 4-6 MECHANICAL TIGHTNESS ......................................................................................... 4-7 4.14.1 CABLE GLANDS .........
REMOTE INTELLIGENT SENSOR - AREA MONITOR FEATURES • TRUE CONTINUOUS MONITORING WITH RELIABLE PAPER TAPE DETECTION Using GMD developed, optimized and proven tape technology. • MICROPROCESSOR CONTROLLED AND SOLID STATE LOGIC For reliability, flexibility and calibration stability. • QUICK RESPONSE & AUTORANGING Sophisticated, dynamic control of the sampling sequence provides a response time as low as 15 seconds, excellent resolution of short term peaks and economic use of tape.
REMOTE INTELLIGENT SENSOR - AREA MONITOR PRODUCT SPECIFICATION ACCURACY PHYSICAL Dimensions: Weight: Enclosure: Cable Glands: ppb Ranges: ppm Ranges: 2772-0020: 2772-0035: ± ± ± ± 15 15 20 20 % % % % of reading ± 1 ppb. of reading ± 0.01 ppm. of reading ± 0.01 ppm. of reading ± 0.02 ppm. 7" Depth x 11.75" Width x 7.875" Height (178mm D x 298mm W x 200mm H) 11.5 lbs. (5.2 Kg.). IP-55 with sealed glands (NEMA 4). 3 x for input/output cables. Pre-wired connector for Optional Printer.
REMOTE INTELLIGENT SENSOR - AREA MONITOR PRODUCT SPECIFICATION (continued) DISPLAY Custom LCD Display: Displayed parameters include: Area measures 5.7" (145mm) x 3.2" (81 mm). System Readiness status, Measured Concentration (3 decades of ppb or ppm), Tape Remaining, and Icons for Gas & Fault alarms.
REMOTE INTELLIGENT SENSOR - AREA MONITOR TABLE #1 RIS CATALOG NUMBERS & DATA CATALOG NUMBER GAS TYPE GAS CODE 2772-0010 TDI 2772-0015 TDI HIGH RANGE 2772-0020 HYDRAZINES 2772-0030 PHOSGENE (A ) 2772-0035 V ELCORIN® 2772-0040 CHLORINE 2772-0060 ARS INE 2772-0090 ACID GASES 2772-0095 HCl HIGH RESOLUTION 2772-0100 HDI 2772-0110 PHOSGENE (B ) 2772-0120* MDI 2772-0150 IPDI 0 5 1 3 35 7 8 9 10 2 4 6 12 2772-0160* MDI, TDI, IPDI 97 2772-0175* TDI HIGH FLOW * 14 RANGE UNITS FLOW RATE ALARM A LA RM AN
REMOTE INTELLIGENT SENSOR - AREA MONITOR 1 INTRODUCTION 1.1 SYSTEM DESCRIPTION A range of Remote Intelligent Sensors (RIS) are available. Each is designed to measure low concentrations of a specific gas. Multiple RIS systems can be connected into a control network to provide an area monitoring capability with central supervision. The RIS is a single point, microprocessor controlled, instrument for use in a fixed location.
REMOTE INTELLIGENT SENSOR - AREA MONITOR DIP SWITCH 2 ON/OFF SWITCH SW1 DIP SWITCH 1 DO NOT TOUCH !! VOLTAGE REGULATOR VR1 BATTERY PLUG OPTION BOARD LCD ADJUST POT. RIBBON CABLE B A EPROMS PRINTER SOCKET INTERFACE CABLE BATTERY J5 PNEUMATIC HOSES AND CONNECTOR FILTER J1 DOOR SWITCH MAGNET ADJUSTMENT CASSETTE MAIN BOARD DOOR PROMIXITY SWITCH FLOW ADJUST POT. RED TEST BUTTON CABLE GLANDS TAPE GATE LEVER TAPE RESET BUTTON LIGHT LEVEL ADJUST MECHNICAL CHASSIS Figure 1-2.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 1.3.8 SAMPLE INLET. The sample is brought into the RIS through the short length of black FEP tube and into the optic block. There are two types of input tube; one has a single 0.25 inch (6 mm) diameter tube, the other is a double tube arrangement used for systems that monitor aerosols. NOTE: It is essential that the input tube is correctly fitted, if incorrectly fitted, the measurement will be inaccurate (Figures 2-4 & 2-5).
REMOTE INTELLIGENT SENSOR - AREA MONITOR NOTES Page 1-4 Instruction 2772-0803
REMOTE INTELLIGENT SENSOR - AREA MONITOR 2 INSTALLATION AND SYSTEM CHECK The RIS may be installed inside or out. It should be mounted and connected according to the instructions provided below, and in an environment that is within the specified limits detailed in the Product Specification. WARNING Failure to comply with these recommendations may void the warranty. 2.1 UNPACKING Carefully check for shipping damage by examination inside and out.
REMOTE INTELLIGENT SENSOR - AREA MONITOR When input connections have been made, and 12 volts DC is available at J1 terminals #1 & 2, leave the system connected overnight with system switch, SW1, off during the recharge. WARNING Each RIS power supply must be connected to line voltage by a separate circuit back to a main distribution point. The connection should not be to a circuit that is liable to be switched off at, say, the end of a shift.
REMOTE INTELLIGENT SENSOR - AREA MONITOR RIS TYPE Standard and Alarm Module Acceptable Combinations 4 + 0 3 or + 2 2 or + 4 1 or + 8 3 + 0 2 or + 4 1 or + 7 High Flow and Alarm Module Alarm Module 2.5.2.4 Alarm Module. With both horn and flasher alarms operating and a well charged battery, the input current is typically 100 mA.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 2.6.3 REACTIVE GASES. Many gases are extremely liable to attenuation and no extension of input tube should be attempted. These gases include ISOCYANATES, HYDRAZINES and ACID GASES such as HF and HCI. 4 -2 0 M A 0 -1 V J 4 2.6.4 SYSTEM PERFORMANCE WITH EXTENDED SAMPLE LINES. Bacharach will not guarantee system performance and accuracy if extended sample lines are fitted, except where the company has expressly given written approval.
REMOTE INTELLIGENT SENSOR - AREA MONITOR If the ‘O’ ring is left on the purge spigot the new cassette will not seat fully and faulty tape handling will occur. Push the new cassette firmly into position. When doing so make sure that the tape enters the open gate and does not catch on the side and break. If the tape is not tight and in the correct position to enter the gate, carefully tighten it by turning the take up spool. It is not necessary to touch the tape directly.
REMOTE INTELLIGENT SENSOR - AREA MONITOR Alarm Level 1 is displayed first and is identified by the number 1 which is shown in addition to the numerical set point value. Similarly, the Alarm level 2 set point which follows, is identified by a 2. IMPORTANT: Be aware that if the RIS is switched off at SW1, the alarm set point(s) will be return to their default at system switch on. It will therefore be necessary to reestablish set points if they differ from the default values. 2.8.2.5 Gas Curve.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 2.9 OPTION PCB INSTALLATION Under the cover on the main board are three slots for mounting option boards. An option board can be inserted in any available slot. The two option cards available are the Serial Printer Interface PCB, and the Alarm Relay PCB (See Section 5.5 for order numbers). 2.9.1 PRINTER (OPTION) INTERFACE INSTALLATION. A suitable external printer can be connected when the printer option is fitted.
REMOTE INTELLIGENT SENSOR - AREA MONITOR TERMINAL USE AND SILKSCREEN IDENTS 12 VDC INPUT (Connected internally to #1) ANALOG OUTPUT NETWORK COMMS INTERFACE SERIAL PRINTER INTERFACE COMBINED GAS & FAULT ALARM NOT ACTIVE NOT ACTIVE RLA1 GAS ALARM 1 RLF FAULT ALARM RLA2 GAS ALARM s RELAY ACTION WITHOUT 2701-1761 OPTION CARD INSTALLED s RELAY ACTION WITH 2701-1761 OPTION CARD INSTALLED TERMINAL – + – A 0V + A OP A IN A OUT B S PI PO PRDY PPRS 0V + – + – + – 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
REMOTE INTELLIGENT SENSOR - AREA MONITOR Figure 2-3.
Figure 2-4. Figure 2-5.
Figure 2-6.
Figure 2-7 Figure 2-8 REMOTE INTELLIGENT SENSOR - AREA MONITOR Page 2-12 Instruction 2772-0803
REMOTE INTELLIGENT SENSOR - AREA MONITOR 3 SYSTEM OPERATION AND FEATURES 3.1 COMPLETE SAMPLING SEQUENCE The sequence starts with system and cassette being purged before gas sampling starts. In addition, a reference light level reading is taken from the fresh tape spot under the optics block. INCOMING SAMPLE PHOTO DIODE LIGHT EMITTING DIODE LIGHT REFLECTED OFF TAPE SURFACE OPTIC BLOCK TAPE Figure 3-1. Sampling Sequence During the sampling period the tape spot is scanned every two seconds.
REMOTE INTELLIGENT SENSOR - AREA MONITOR This method eliminates the ‘zero drift’ that could otherwise occur with slight variation in the reflective value of the tape. It also ensures that system accuracy is not compromised when reusing the same tape spot. System accuracy is not compromised when reusing the same tape spot. 3.4 3.2 3.5 DENSITY & TIME OPERATING MODES Actual sampling takes place under control of one of two operating modes.
REMOTE INTELLIGENT SENSOR - AREA MONITOR SYSTEM OK icon confirms the system is operating normally. Flashing This symbol shows that sampling vacuum has dropped. The cause could be a pump failure or an air leak. NUMERICAL VALUE (in ppb or ppm) alternates with % value of remaining cassette life. When cassette is new the display reads 99%. As the tape is used, the numerical value reduces in proportion. Optics Icon warns that the light level is not acceptable.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 3.8.3 FAULT RELAY. With the basic system the single (combined) gas alarm/fault relay is operated to provide external warning of any of the monitored ‘fault’ conditions. In a fault condition, the relay output ‘toggles’ open and closed at 1 Hz. When the Relay alarm Option is fitted, a separate relay output is provided which opens and remains open when a fault is detected. The fault icon and the relay output remain active until the fault condition is cleared. 3.
REMOTE INTELLIGENT SENSOR - AREA MONITOR IMPORTANT: Please note that this method is not suitable for, and is not intended to be used for, checking or verifying the system’s calibration, but only for alarm simulation and checks. Test Preparation. Warn that tests are to be carried out and that external alarm systems may be activated. Check that the RIS is powered up and working. Open the door and disable the door open switch with a magnet. (A suitable magnet is available, see Chapter 5).
REMOTE INTELLIGENT SENSOR - AREA MONITOR In addition to that supplied by GMD, printers meeting the specification detailed below may be used. Those intending to use an alternative printer should check the specification carefully. 3.14.2 PRINTER SPECIFICATION. The printer must be capable of receiving serial data and meet the following requirements: Baud Rate: 600, 1200, 2400, or 9600 bits/sec. Stop Bits: 2 bits Word length: 8 bits Parity: Even Signal Level: TTL Logic Type: Positive 3.14.3 PRINTOUT MODES.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 3.14.3.4 Printed Date Format. A choice of month/ day or day/month format is available: For the US month/day/year format, set SW2 switches 1 and 2 ‘ON’. For the European day/month/year format, set SW2 switches 1 and 2 ‘OFF’. 3.14.3.5 Data Storage Up To 7 Days. In any of the selected modes, data can be stored for later printout (up to 7 days of data). This is simply achieved by unplugging the printer connector at the RIS printer socket.
REMOTE INTELLIGENT SENSOR - AREA MONITOR After the cable has been connected and checked, switch the system back on and test the printer operation. This is most conveniently done by setting the # 1 switch on SW1 of the printer option board to ‘OFF’. This will cause each data point to be printed as it is stored. 3.14.5.2 Connecting a Non-GMD Printer. First verify that the printer meets the specification detailed in Section 3.14.2.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 4 MAINTENANCE AND TROUBLESHOOTING 4.1 MAINTENANCE GENERAL Under normal circumstances, recommended routine maintenance consists of cleaning the exterior of the enclosure, carrying out a check of key parameters, and checking certain parts for mechanical tightness. In addition, occasional cleaning of the input path and optics block may be required under adverse sampling conditions. Each of these procedures is dealt with below.
REMOTE INTELLIGENT SENSOR - AREA MONITOR With the tape in place, adjust the track 1 potentiometer until the reading is 220. Clockwise rotation of potentiometers increases the level. When track 1 has been adjusted, press the HOLD/RELEASE button to allow track 2 to be displayed. HOLD this display as before and adjust track 2 in the same manor as track 1. After adjustments exit the TEST Mode by pressing the red button on the rear of the door again, unless other tests have to be done.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 4.8 MEASURING PUMP CURRENT To establish the pump run current, first check the system current in the TEST Mode. Then the total current is measured as detailed below and the TEST Mode current deducted from total current to give pump current. If the printer option is fitted, the total current is shown on the printout header. If it is not, total current can be measured with a suitable multimeter in series with the RIS 12 VDC input at J1 terminal #2.
REMOTE INTELLIGENT SENSOR - AREA MONITOR Repeat several times, also with the gate open. If a can of pressurized air is available, carefully position tube at the tape side of the gate and blow again several times. Suitable cans of air are usually available from photographic suppliers. A mechanical pump or bellows can be used but it may not be possible to blow from the tape side. NOTE: Take care to ensure that any dirt, not trapped by the tape in the open gate, is removed.
REMOTE INTELLIGENT SENSOR - AREA MONITOR NOTE: If it is not possible to achieve a satisfactory average tape step length, please refer to additional information in Section 4.21.2. Figure 4-6. Stepping Clamp Vertical With the stepping cam vertical, and gate opening lever in the gate closed position, the optics block can be replaced and the two screws put in loosely. Position the optics block so that there is a gap of 0.020" to 0.040" (0.5mm to 1.0mm) between the two halves of the gate.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 4.11.2 REMOVAL OF THE MECHANICAL CHASSIS. Remove the cassette, undo the two ribbon cable connectors and the two hose couplings in the tubes that connect the chassis to the body of the instrument. Undo the three (captive) cap head screws that secure the chassis (see Figure 4-8). A 2.5 mm hex key is required for this. The mechanical chassis can now be lifted out. Figure 4-10. Pump Types Figure 4-8. Mechanical Chassis 4.11.3 PUMP REMOVAL.
REMOTE INTELLIGENT SENSOR - AREA MONITOR entered. These practices, if regularly carried out, will build up an informative system history. This will show trends and prove a useful diagnostic aid should this be required. The time taken to check and record parameters for each cassette change is normally only a few minutes. 4.14 MECHANICAL TIGHTNESS It is good practice to carry out an annual check of mechanical security. The check should include: 4.14.1 CABLE GLANDS. Check that cable glands are tight. 4.14.
REMOTE INTELLIGENT SENSOR - AREA MONITOR NOTE: The sections below do not refer to the modest changes in flow that occur over a period of time and are quickly adjusted for with the appropriate potentiometer. 4.20.1 A FAULTY PUMP. If this is the case, change the pump. Note that there are two pump types, which are fitted depending upon the RIS model. Refer to Sections 4.8 & 4.11 for guidance including typical pump running current. Check Section 5 for the correct catalog number. 4.20.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 5 SYSTEM SPARE PARTS 5.1 MODEL DEPENDENT PARTS 5.1.4 RIS CAT.# Some parts are model dependent (see the tables below). The other parts are common to all models. 5.1.1 CASSETTE INSTRUMENT CAT.# GAS TYPE CASSETTE CAT.
REMOTE INTELLIGENT SENSOR - AREA MONITOR 5.4 COMMON PARTS CAT. # DESCRIPTION 5.5 OPTIONS AND SUPPLIES CAT. # DESCRIPTION 2701-1072 Polycarbonate Window ** 2772-0251 Serial Printer Interface PCB 2701-1638 Door Keypad ** order these tw items together. Not supplied separately 2772-2079 Portable Prnter 110/120 VAC 2772-2078 Portable Printer 220 VAC 2772-2077 Portable Printer 240 VAC 2772-2083 Portable Printer Cable 2701-1089 Trumpet Cable Gland PG-9 2701-1489 Polyglass Enclosure Assy.
REMOTE INTELLIGENT SENSOR - AREA MONITOR SUPPLEMENT A A1 EARLIER RIS BASE BOARDS A1.1 ADJUSTING LIGHT LEVELS ON PHASE 1 RIS UNITS Several references to RlS’s manufactured before April 1992 with phase 1 base boards have been given in the main manual (Sections 1.1, 1.3.7, 2.8.2.1, & 4.4) Any references to Figure 2-3 should be refered to Figure S-3.
REMOTE INTELLIGENT SENSOR - AREA MONITOR Adjustment method ‘b’. Remove the cassette and pull out a loop of several inches of tape. Insert a portion in the gate while the cassette is held in one hand; or placed on the top of the RIS. Do not touch tape with bare fingers to avoid contact with the chemicals on the tape. With the tape in the gate and the cassette supported in one hand, adjust the potentiometer with the other hand until the reading is 220.
REMOTE INTELLIGENT SENSOR - AREA MONITOR Figure S-3.
REMOTE INTELLIGENT SENSOR - AREA MONITOR Figure S-4.
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