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Thermo Fisher Scientific

Detector Temperature Out of Range

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Issue

The Detector temperature indicates that it is out of range which prohibits a LabBook from running

Environment

iCAP PRO

Resolution

Upgrade Qtegra to 2.18 SR1, current version at time this KB article has been edited

Review service alert P056 Rev 1 for other potential causes.

If necessary, decrease the chiller temperature. Chiller temperature can be set to  5 degrees C below ambient temperature. Don't exceed this temperature in order to avoid condensation of the air humidity at the cold water lines inside the instrument. As a result, water can drop inside instrument and cause issues.

Analysis

Detector temperature interlock is set at -44 degrees C. As a test you can set the chiller lower than 5 degrees C below ambient temperature and see if CID is able to maintain the set temperature. If it is, this would indicate a bad/aged peltier.

To give an idea on how chiller can impact the cooling of detector, experienced an issue where temperature was hovierng between -43.7 to -44.1. Set chiller temperature  to 17 degrees C and detector temperature was now at ~-45.2.