Det-Tronics R8471A, Instructions Manual

Page 1: ...Instructions 95 8398 02 Combustible Gas Controller R8471A Detector Electronics Corporation 6901 West 110th Street Minneapolis Minnesota 55438 USA Tel 612 941 5665 or 800 765 3473 Fax 612 829 8750 2 95...

Page 2: ...E 23 Manual Check of Output Devices 23 Checkout in Normal Mode 23 Sensor Replacement 23 Controller Calibration 24 Transmitter Calibration 24 TROUBLESHOOTING 24 LOSS OF SENSOR SENSITIVITY 24 REPLACEMEN...

Page 3: ...atible with Det Tronics R7400 series flame controllers Variety of racks available in 4U or 3U height config uration SPECIFICATIONS CONTROLLER OPERATING VOLTAGE 24 vdc Can operate in the range of 18 to...

Page 4: ...regarding use of the sensor in oxy gen deficient atmospheres HUMIDITY RANGE 0 to 99 RH non condensing HUMIDITY EFFECT Less than 5 percent full scale deviation at 10 to 90 RH SYSTEM APPROVAL The R8471A...

Page 5: ...formation section for more informa tion CONTROLLER Faceplate Description The faceplate of the controller provides LEDs for iden tifying status conditions a digital display and bar graph display for in...

Page 6: ...l is furnished with a set of four relays in place of the four solid state outputs The relays have SPST contacts rated 5 amperes at 30 vdc or 250 vac This model also includes a selectable isolated non...

Page 7: ...is on and indicates the sensor input in LFL Bar graph display reads the same as the digital display All LEDs are off Alarm outputs are in their normal state energized or de energized as programmed DC...

Page 8: ...by pressing the Reset button located on the front panel of the controller See Figure 3 When the Reset but ton is momentarily depressed all LEDs turn off and all outputs return to their normal conditio...

Page 9: ...ibration informa tion is lost Sensor calibration must be per formed even if the sensor was not replaced To enter the Sensor Replacement mode first enter the Calibrate mode as described above then pres...

Page 10: ...G REQUlREMENTS NOTE The wiring procedures in this manual are intend ed to ensure proper functioning of the device under normal conditions However because of the many variations in wiring codes and reg...

Page 11: ...ances and wire gauge will be different in each case Refer to the transmitter manual for information specific to that model Kit Description The sensor separation kit consists of the following Junction...

Page 12: ...onnected to earth ground at the transmitter junction box The shield of the cable connecting the transmitter and controller should be open at the transmitter junction box and connected to earth ground...

Page 13: ...n de classified 2 Remove the cover from the transmitter junction box NOTE The transmitter and controller contain semicon ductor devices that are susceptible to damage by electrostatic discharge An ele...

Page 14: ...BLK Power supply negative RED CTR Signal WHT Power supply positive 7 Check all field wiring to ensure that the proper connections have been made then pour the con duit seals and allow them to dry if...

Page 15: ...N LINE WITH THE CLIP IN THE BOTTOM BRACKET 3 GAS CONTROLLERS ARE APPROX ONE INCH WIDE AND REQUIRE ONE RAIL FOR INSERTION PLACE CLIPS IN LINE WITH GUIDE RAILS CAGES WILL ACCEPT AS MANY GAS CONTROLLERS...

Page 16: ...s 15 and 16 Fault Output 14 Figure 10 A Typical System with Relay Outputs and Non Isolated Current Output CURRENT OUTPUT CHASSIS GROUND POWER SENSOR EXTERNAL RESET HIGH ALARM HIGH ALARM OC AUX ALARM A...

Page 17: ...uctive load with a diode used for transient suppression CONTROLLER PROGRAMMING Refer to Figure 13 to determine the location of pro gramming jumpers and switches Table 1 shows the selectable options fo...

Page 18: ...uble checking the system to be sure that all phases of system installation are complete and have been performed correctly 1 Sensors are pointing down and junction boxes are securely mounted 2 Optional...

Page 19: ...ation gas 50 LFL To check the present levels use the Setpoint Display Mode described below To change the values use the Setpoint Adjustment Procedure SETPOINT DISPLAY MODE 1 To enter the Setpoint Disp...

Page 20: ...bility The sensor must be calibrated Before a new system is initially put into service If the sensor is replaced If the transmitter is replaced If the controller is replaced If the sensor is exposed t...

Page 21: ...s requires removing the enclosure cover therefore the hazardous area must be de classified When transmitter calibration is performed an ini tial calibration of the controller must be completed in addi...

Page 22: ...to ensure that the area is clear of any combustible gases If there is any indication of the presence of com bustible gas at the sensor calibration or mainte nance should not be performed The location...

Page 23: ...d holding the RESET button on the controller faceplate for approximately 9 seconds until the digital display begins flashing and the CAL LED is illuminated Release the RESET button 3 Press the SET but...

Page 24: ...pro cedure is not recommended 3 Depress and hold the Reset button until the CAL LED is illuminated and the digital display starts to flash approximately 9 seconds 4 When the Zero calculations are com...

Page 25: ...CHECK OF OUTPUT DEVICES Fault detection circuitry continuously monitors for an open sensing element excessive negative zero drift open sensor wiring and various other problems that could prevent prope...

Page 26: ...com bustible gas sensors Interfering or contaminating substances that can adversely affect the response of the sensor to combustible gases are as follows A Materials that can clog the pores of the si...

Page 27: ...button If RESET is pressed recalibrate and check setpoints F96 Status 1 Input power problem should be18 to 32 volts Check operation of power source and power wiring F97 Status 1 Controller type inval...

Page 28: ...re removing the device from the mounting cage or plugging in the replacement unit The sensing element is mounted in a sealed housing and is not intended to be repaired When calibration can no longer b...

Page 29: ...ngineers Pvt Ltd Veers Desai Road Andheri West Bombay 400 053 INDIA Telephone 91 22 632 2374 Facsimile 91 22 632 2374 Dial Detector Electronics Southern Europe Ciodue FSI Via Stephenson 43 A 20157 Mil...

Page 30: ...nal relay contacts SENSORS Specify standard poison resistant or high tempera ture sensor in aluminum or stainless steel housing SENSOR SEPARATION KITS Specify whether used with K Series Model 400 405...

Page 31: ...29...

Page 32: ...Recommended Test Form Detector Detector Date Date Date Number Location Installed Checked Calibrated Remarks 30...

Page 33: ...95 8398 Fault Record Sheet Date Time Detector System Status Operator Comments Affected 31...

Page 34: ...Printed in USA Detector Electronics Corporation 6901 West 110th Street Minneapolis Minnesota 55438 USA Tel 612 941 5665 or 800 765 3473 Fax 612 829 8750...