negative FPD output signal
Posted: Sat Feb 26, 2011 6:08 pm
I have developed a method for H2S detection using a FPD. The method was running without any problems until the flame went off. The system wouldnt ignite again despite my best efforts. I checked for leaks both internal and external to the GC, also made sure that I had enough pressure and that all the flows were running normally. A GC technician suggested lowering the lit offset (previously set at 2.0 pA) and that helped to get the flame back on. However, now the FPD output signal is negative?
Does any one know how to resolve this issue?
Does any one know how to resolve this issue?