Detcon 1000_CO2 - Manual (Page 26)

Model 1000 CO2
Model 1000 CO2 Instruction Manual Rev. 2.2 Page 22 of 28
2 - Remove gas inlet adapter and tubing connections to expose sensor housing (see illustration page 35).
3 - Remove lower half of sensor housing using an Allen wrench (3 screws).
4 - Remove existing optical sensor and replace with new optical sensor.
5 - Re-install lower half of sensor housing.
6 - Restore system power (if classified) or plug in transmitter module and replace enclosure cover (if
unclassified).
7 - As the unit reports “WARMING UP” message, use the magnetic programming tool and swipe across
PGM1 or
PGM2. This will take the unit into a one-time gain setting mode which takes 1 minute to complete.
8 - Perform a new zero calibration followed by a new span calibration.
12.0 Troubleshooting
Reading higher or lower than anticipated
Probable Cause: No sample flow or bad Span or Zero Calibration
1. Check for adequate sample and air f lows (per range table)
2. Check span gas is same as programmed Autospan value
3. Check Span Calibration for valid concentration
4. Re-calibrate with known good span gas
5. Re-zero calibrate with CO
2
free gas
“Span Fault” Error
1. Check for adequate sample flow and airflow (per range table)
2. Check span gas is same as programmed Autospan value
3. Check Span Calibration for valid concentration
4. Re-calibrate with known good span gas this should clear error.
“Memory Fault” or “Error @ XXXXXX” Message
Probable Cause: Microprocessor error that must be cleared
1. Unplug transmitter module and re-plug transmitter, this may clear the fault. If not…..
2. Un-plug/Re-plug transmitter module and swipe magnet over PGM1 in the first 3 seconds
3. This re-initializes the sensor in a process that takes 1-2 minutes
4. Re-set programmed values for cal gas and alarms, as these are lost in re-initializing
5. Re-Zero and Re-span to restore normal operation
6. This should clear any Memory or “Error @ XXXXXX” conditions
“Signal Fault .XX” Message
Probable Cause: Problematic IR sensor housing assembly or Faulty IR Sensor
1. Unplug transmitter module and re-plug transmitter, this may clear the fault.
If not:
2. Un-plug/Re-plug transmitter module and swipe magnet over PGM1 in the first 3 seconds
3. This re-initializes the sensor in a process that takes 1-2 minutes
4. Re-set programmed values for cal gas and alarms, as these are lost in re-initializing
5. Re-Zero and Re-span to restore normal operation
6. This may clear any “Signal Fault @ XXXXXX” conditions
7. Replace IR sensor and/or IR sensor housing assembly if necessary.
“Lamp Fault”
Probable Cause: IR Sensor in need of Replacement
1. Unplug transmitter module and re-plug transmitter, this may clear the fault.
2. Remove lower section of IR Sensor housing and determine if IR light source is on and blinking
3. If light source is not blinking, replace the IR sensor.