debora.ferreira wrote:
Hello everybody,
work with an Agilent 7010B MS GC-MS. Yesterday I cleaned the ion source (HES) and when the vacuum was restored, I tried to do an autotune and an error message appeared, saying that I didn't have enough points to obtain a gain. I opened it and cleaned it again, now I try to autotune, with the filament energy at 100 uA, but the filament energy doesn't stop rising, it's already at 170 uA. I changed the settings and filament 1 and 2 have the same behavior. Has anyone ever experienced this?
Thanks!
My 7000C often has a problem that it reads a current even when the filament is turned off. It reads higher as the source temperature increases.
That it keeps increasing over time seems it could either be a firmware problem or a problem with the control board. I think that may be the main board on these instruments. I once had an Agilent ICP/MS where the EMV would drift higher several hundred volts during a run, then reset when the instrument plasma was turned off then on again. It was a problem with the board that controlled the voltage, so maybe it is the same with the filament.
What temperature is the source in your instrument? If you leave the heater off does it do the same thing?