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- Posts: 1
- Joined: Thu Dec 14, 2017 10:46 am
It is the first time I use this kind of forum, so excuse me if it is not appropriate or if my english is not so good.
I'm using a Agilent GC 7890B with a purge and trap system and a capillary column. Recently, the GC do not turn in "ready" and remains on "not ready" state. When I check the status, the Aux EPC1 pressure is not ready. It is the pressure into the column that is too high. And it trends to rise with time.
But, even if it is not ready, if I launch a run, the pressure goes down to the value expected.
I already cut off like 1m of my column in case of there is a plug (blockage) into it but it doesn't seem to change anything. I rise the oven temperature till 275°C to eliminate what it may be inside. And it seems that there is a blockage because when I launch the purge, the pressure doest not go down when I stop it.
Of course, I cleaned everything that I could before doing all this.
If you have any ideas or solutions or whatever, it could be well appropriate !
Thank you,
Colin