Waters Autospec Premier Operator's Manual page 250

No peaks in the Tune window (no ion beam) (Continued)
Possible cause
The source components are dirty.
The source components are
incorrectly assembled.
Unsteady or low intensity peaks in the Tune window
Possible cause
Problem with the sample delivery
(autosampler, GC system).
The Tune window parameters are
improperly set.
The source components are dirty.
Insufficient vacuum
Possible cause
Fore pumps not operating.
8-4 Troubleshooting
Corrective action
Clean the source components.
See "Inner source chamber assembly
maintenance" on page
Ensure that the source voltage
readbacks vary with the Tune
Window setting. If any of these
voltages are absent, disassemble
and correctly reassemble the source
assembly.
See "Inner source chamber assembly
maintenance" on page
Corrective action
Look for pressure variation on
injection.
Optimize the parameters.
Once you obtain a beam, ensure that
all lenses affect the beam as
expected.
Clean the source components.
See "Inner source chamber assembly
maintenance" on page
Corrective action
Ensure that the rotary pumps'
MCBs are switched on.
See "A.C. distribution panel" on
page 1-6.
7-6.
7-6.
7-6.