turbo pump vs diffusion pump

[Sallybeetle]

I have an Agilent 5973N MSD and am new to GC/MS. How can I tell if it is fitted with a turbo pump or diffusion pump?

[Steve Reimer]

If you can't hear the high pitched whine and can't get behind the MS to see, press the menu button on the front panel of the mass spec 3 times. It should say MS parameters, press the item button and the turbo pump speed will be displayed if there is one. If you have a diff pump turbo speed will not appear as a selection.

[MSCHemist]

Just take off the bottom cover (3 screws on the side). If it is a diff pump below the fan should be a window so you can see the sight glass on the diff pump for oil level. Otherwise it is a turbo.

[Sallybeetle]

Thank you all for advising me on how to tell if I have a Diffusion versus Turbo pump!

I opened the bottom cover and found the oil level window.

This is what happens when a person is teaching themselves how to refurb and run a GC/MS. :/

[James_Ball]

Thank you all for advising me on how to tell if I have a Diffusion versus Turbo pump!

I opened the bottom cover and found the oil level window.

This is what happens when a person is teaching themselves how to refurb and run a GC/MS. :/

At least you have the initiative to teach yourself such things, that is very good indeed