Agilent Technologies 7250 Troubleshooting And Maintenance Manual page 37

2 General Troubleshooting
Foreline pressure is too low
If the foreline pressures you observe are below 20 mTorr, check for the following:
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Quad pressure is too low
If the quad pressure you observe is below 1 × 10
on or off, check for the following:
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High vacuum pressure is too high
If the high vacuum pressure you observe is above 2 × 10
following:
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7250 Accurate-Mass Q-TOF Troubleshooting and Maintenance Manual
Column (carrier gas) flow is too low
Column plugged or crushed by an overtightened nut
Collision gas flows are too low
Empty or insufficient carrier gas supply*
Bent or pinched carrier gas tubing*
Foreline gauge is not working correctly
* This could create a fault condition in the GC that would prevent the GC
from operating.
Column (carrier gas) flow is too low
Collision gas flows are too low
Column plugged or crushed by overtightened nut
Empty or insufficient carrier gas supply*
Bent or pinched carrier gas tubing*
* This could create a fault condition in the GC that would prevent the GC
from operating.
Turbos are not up to speed
Too much water is in the system
Did not wait long enough for system to pump down
Poor carrier gas quality
System is not leak tight, check fittings
-6
Torr with the collision cell gas
-6
Torr, check for the
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