Univex 5100-02-IT User Manual
Page 30
Model 5100-02-IT Combustible Gas Sensor Module
Page: 28
7.5.3 IF 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 50%LEL and verify that the sensor sees 50% LEL gas after calibration.
4. If the sensor still does not see gas, power cycle the unit and repeat calibration.
7.5.4 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 methane during warm-up.
7.5.4.1 IF THE MODULE DOES NOT DISPLAY THE CORRECT %LEL
1. Power cycle the unit.
2. Recalibrate the sensor.
7.5.4.2 IF THE DISPLAY SHOWS ‘F’ – SENSOR FAILURE OR SENSOR MISSING
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.
7.5.4.3 IF THE MODULE SHOWS “***CALIBRATION REQUIRED***”
1. Calibrate the module.
7.5.4.4 IF THE DISPLAY SHOWS ‘H’ (OR L) THEN THE LOCAL HIGH OR LOW ALARM IS ACTIVE
7.5.4.5 IF THE DISPLAY SHOWS “M” – NOT CALIBRATED
1. Calibrate the module.
7.5.4.6 IF THE DISPLAY SHOWS “C” – CALIBRATION MODE
1. Complete calibration and exit to operating mode.
7.5.4.7 IF THE DISPLAY SHOWS “S” – SENTRY CONNECTION
1. Check connections with Sentry Controller
7.5.4.8 IF THE DISPLAY SHOWS “SENSOR FAIL”
1. The sensor assembly is defective, contact technical support
7.5.5 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
If the display shows “▼” Down Arrow: Sensor signal too low - Recalibrate