GC-MS 5973 won't pump down. Foreline pump turns off after ~10min

Hello,

I am having a problem pumping down GC-MSD 5973.

The GC-MSD was turned off over the weekend and on Monday when I tried to pump down, the foreline pump automatically turns off after about ~10 minutes.

From the pump down status, I can see that the turbo pump in fact reaches 100%.

Any help on the situation is appreciated.

Top Replies

finakoff over 4 years ago in reply to chemist23 +1

It looks like foreline pump is not working corectly and ptotection trips (overheat sensor for example).
tryan over 4 years ago +1

Did you check to make sure the side plate is still sealed?
trifecta over 4 years ago +1

We have experienced this but on a 5975. The cooling fan for the turbo pump failed to restart after maintenance. The error message however did not refer to the fan at all. The easiest way to check if the…

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0 chemist23 over 4 years ago

Even though the turbo pump speed reaches 100%, the status indicates it's "not up to speed"

from the software.

However, when I select 'pump down' from the software, the turbo pump speed only reaches 70%, then the foreline pump turns off.
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0 finakoff over 4 years ago in reply to chemist23

It looks like foreline pump is not working corectly and ptotection trips (overheat sensor for example).
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0 finakoff over 4 years ago in reply to chemist23

It looks like foreline pump is not working corectly and ptotection trips (overheat sensor for example).
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