Ametek Dycor CG1000-RTP User Manual page 68

Temp Rise Failure
T/C (Thermocouple)
Circuit Failure
If this message is soon followed by a "Thermocouple Failure" message, see that message for troubleshooting instruc-
tions.
Thermocouple
Failure
Verify Failure
Zero Gas Range Error
6-4 | Dycor CG1000-RTP Oxygen Analyzer
Sensor has failed to increase a minimum of 10°C in a 60-second time
frame during start-up. Once the system reaches the operating tem-
perature set point, this message will appear only if the sensor falls
below the set point by 15°C and fails to recover within 60 seconds.
Problems that can cause this error are:
- AC line power problem at the sensor
- Open furnace
- Backplane board failure
- Loss of furnace drive signal
- Thermocouple failed (shorted or opened)
- Polarity of thermocouple is incorrect
Analyzer recognizes a sudden drop in temperature (greater than
100°C).
Problems that can cause this error are:
- Shorted thermocouple
- Polarity of thermocouple wires is incorrect
- Display module failure
- Backplane board failure
Indicated sensor temperature falls below -70°C.
Problems that can cause this error are:
- Open thermocouple
- Faulty interconnecting wiring
- Display module failure
Verify gas does not read within the range you defined. If you receive
this message, calibrate the analyzer.
Calibration zero gas does not read within the software's allowable
limits. Once this error occurs, calibration of the system is aborted.
Problems that can cause this error are:
- Calibration gas setup problem
- Incorrect flow rates between the span gas and calibration gases
- Calibration gas value incorrectly entered
- Failed cell (thermal calibration should be run at this time)
- Leak or plug in plumbing