Hi,
I have in the lab a TSQ Quantumm access Max triplequad mass spec. since last year it was not opened. Had a problem regarding the ion gauge. exchanged it. more, now, I have a problem with forepump pressure, does not reach 1 mTorr. Want to ask if the vacuum gauge starts of the minimum forepump pressure is reached or if the turbomolecullar pump shoud start in the meantime with forepump vacuum. a technician told me that there is a leak. verified the vacuum vent valve and its fine but I can not figure what could be the problem. I'm afraid it's not an electronic problem, faulty electronical board or something.
thanks in advance!