Instruction manual

12.0 TROUBLESHOOTING SM425 INSTRUCTION MANUAL

12.1.2.2 Error-2: Heater Temperature Failure

This error occurs if the detector heater temperature does not rise during warm-up or if the temperature

falls below 730°C or exceeds 780°C after warm-up is completed. Alarm 10 (cold junction temperature

alarm) or alarm 11 (thermocouple voltage alarm) may be generated during an Error-2 condition. Press

the error indication to get a description of the error and confirm whether or not these alarms are being

generated simultaneously.

If Alarm 10 is generated, a failure in the cold junction system is suspected. In this case, follow the

procedure for troubleshooting alarm 10 in Section 1.63.2.5.

If Alarm 11 is generated, a failure in the thermocouple system located in the detector heater is suspected.

In this case, follow the procedure for troubleshooting Alarm 11 in Section 1.63.2.6

42500001 REV A 189