FID fault

Hi all,

The 7890B GC shows Back detector fault. The FID is reading 5.6 E06 pA.

The GC is installed within a glove box and access is limited and maintenance cannot be performed.

Any ideas? I had recently also a failure on a trace heating controller (trace heating installed on a custom made FID chimney) and i think it might be electrical issue.

Thank you,

Giannis

Top Replies

Lance Nelson over 2 years ago in reply to ISH +3

One common cause of this is the electrometer is grounding somewhere. Often it is due to the spring at the end of the interconnect assembly is not resting correctly inside the groove on the collector itself…

0 NB-SSS over 2 years ago in reply to Giannis

tbh, if your signal is consistently as bad as above I'd say you won't be able to use the GC at present so the requirement for operation is mute, but that's just me. If you can get to the right side panel where the main board is located via the glove box then you can disconnect the FID electrometer from the main board whilst the GC is on but I wouldn't recommend it!
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