Sierra Monitor Corporation 5100-06-IT User Manual
Page 33
Model 5100-XX-IT Toxic Gas Sensor Module
Page: 29
7.5.4 MOISTURE TRAPS AND RAINSHIELDS
• Conduit seals and drains installed to avoid moisture build up in electronics enclosure. Water accumulation
in sensor module enclosures is a major cause of damage and system failures - take precautions to seal
electrical conduits and provide moisture traps and drains to avoid water damage.
• Rain-shields installed where applicable.
7.5.5 STANDARD
VOLTAGES
• Regulated DC voltage to be applied to the sensor module must be between 10 VDC and 30 VDC.
7.6 INSPECTION AND TROUBLESHOOTING GUIDE
The inspection and troubleshooting guide can be used to step through the system start-up and to determine
the corrective action if a fault occurs.
7.6.1 IF IR MODULE DOES NOT RESPOND TO GAS
1. Repeat calibration procedure.
2. Remove the gas and wait for the timer to completely count down.
3. Apply calibration gas and verify that the sensor sees calibration gas after calibration.
4. If the sensor still does not see gas, power cycle the unit and repeat calibration.
7.6.2 IF THE MODULE DISPLAYS “STARTING” FOR MORE THAN 1 HOUR
1. Make sure the sensor is placed in an ambient room temperature environment.
2. Power cycle the sensor.
3. Ensure that the sensor is not exposed to gas of interest during warm-up.
7.6.3 IF THE MODULE DOES NOT DISPLAY THE CORRECT %PPM
1. Power cycle the unit.
2. Recalibrate the sensor.
7.6.4 IF THE DISPLAY SHOWS ‘F’ – SENSOR MISSING OR BAD SENSOR
1. Power down the unit.
2. Open the enclosure and unplug the sensor assembly from the transmitter board.
3. Plug the sensor back into the transmitter board carefully and ensure a secure fit.
4. Check all other connections.
5. Power up the unit.
7.6.5 IF THE MODULE SHOWS “***CALIBRATION REQUIRED***”
1. Calibrate the module.
7.6.6 IF THE DISPLAY SHOWS ‘H’ (OR L) THEN THE LOCAL HIGH OR LOW ALARM IS ACTIVE
7.6.7 IF THE DISPLAY SHOWS “M” – NOT CALIBRATED
1. Calibrate the module.
7.6.8 IF THE DISPLAY SHOWS “C” – CALIBRATION MODE
1. Complete calibration and exit to operating mode.
7.6.9 IF THE DISPLAY SHOWS “S” – SENTRY CONNECTION
1. Check connections with Sentry Controller
7.6.10 DIAGNOSTIC LEDS
LED 1 = 1 Hz Heartbeat normal, 2 Hz Panic Error
2 = Computation process
3 = 1 Hz Heartbeat normal
4 = HART or Sentry comms activity