Chromatography Forum

Hi, I'm helping out a university dust off their old Thermo classic MS. I have taken the system apart, gotten everything cleaned up, pressure appears to be fine. However, I have a few items that are failing. I have yet to do any calibrations/tuning on the system. And, I know sometimes, failures occur because the piece aren't turned on yet or pressure isn't where it should be. I am hoping this is the case. But, I can't seem to find any notes in the manual about this for these failures. Everything on the system appears to be passing but these:

Failures:
Multipole Det RF: -2.84 Fail
Multipole RF Mod: +0.02 Fail
Multipole RF Amp: +29.32 Fail

Looking at the Ion Optics on the status screen, it says "Multipole Frequency On- No"

On Diagnostics Screen, Tuning Multipole Frequency, I'm seeing a flat line instead of a V

I am hoping there is something obvious that I need to do first. Like turn on the multipole frequency.. but I can't seem to find anything that does that.

Thanks

First question: Was it working when it was put away? Often instruments are but in the basement due malfunctions that are too expensive to repair at the time.

Second question: Did you connect every thing back the right way? Both inside the manifold and all the cables on the top cover?

Third question: When reassembling the optics did you reassemble it in reverse order from when you took it apart? If so you are most likely shorting a multipole against the chassis. MP0 is mounted first and push as far to the rear as possible before mounting MP1..

Fourth question: Running power supplies diagnostics are there any power supplies that fail?

If all else fails.. Call a Service provider for the MS.. I would suggest Thermo but there are several providers for these older instuments.

Good luck!