by
ianhb » Sat Nov 04, 2017 9:53 pm
I was facing this issue intermittantly, while resurrecting a used unit i aquired.
I would recommend venting the machine as per the manual, and performing a cleaning on the source, changing the filament if needed.
Start by blanking off the column and isolating the ms, and pump down, set the source temp for 250 and leave overnight. This temp is recommended in the manual.
Perform an autotune then a full calibration the next day, verifying your vial has enough PFTBA in it for the reference gas.
Turbomass will reset the parameters on a full autotune and work from there.
Also, verify the 0.8mm set screws on the filament connectors are tight, and your filament is properly positioned while cleaning or reassembling the source. Be careful with the screw on the filament, it can break easily.