, I have problem with FID signal after ignition
The signal out put value still for a bout one hour
On a bout 500 pf then drop to about 60 pf
Hi dheyaaldeen ,
Please let us know the model number of the GC. I have not seen a FID as bad as this one in awhile. I would rule out all the typical maintenance items first such as jet and collector. It looks like a gas quality issue to me at the moment, but more information would be appreciated.
thanks for your reply, GC (6890N) –Dual Detector (FID) and (TCD). yesterday we Condition a PONA capillary column for several hours .today FID signal stable with value 13.6 pf and TCD 53.1 uv.
Is the value of TCD signal good?
I would say its usable signal on the TCD, but a little high. I like to see 30 or below.You could try and raise the TCD temp higher for a couple of hours. General advice since I dont know your method specifics.
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