Hi, I'm using a GC FPD 6890N. The signal output went to negative after the sample peak.
I try to re-ignite, the signal output went down to negative.
I saw that there are some hot vapor from the exhaust, so I was expected it was ignited.
I checked all the gases (Helium, Hydrogen, Air and Nitrogen) are OK and the pressure of gases were maintained as per setting
May I know what caused this phenomena ?
Thank you very much.
