Waters GCT Premier Operator's Manual page 265

Insufficient vacuum: (Continued)
Possible cause
Scroll pump not operating correctly.
Leak in a vacuum backing line.
Restriction in the vacuum pump
exhaust tubing.
Turbomolecular pump not operating
correctly.
Penning gauge is dirty.
Pneumatic gas pressure too low and
valves not opening.
Leak in the vacuum housing.
CI gas is switched on
Corrective action
Contact Waters for advice.
See also: Contacting Waters on
page 11-14.
Inspect the vacuum hoses for cracks
or vacuum leaks.
Inspect the exhaust lines for
restrictions.
Contact Waters for advice.
See also: Contacting Waters on
page 11-14.
Clean or replace the gauge.
Contact Waters for advice.
See also: Contacting Waters on
page 11-14.
Check the pneumatic gas connec-
tion and ensure the pressure setting
is correct.
See also: Table titled "Gas pres-
sures:" on page 3-2.
Ensure the O-rings are correctly
positioned in the groove, that they
are in good condition, and clean and
free from dust.
See also: Changing the EI/CI inner
source assembly on page
Switch off the CI gas in the Tune
window CI Tune tab CI pane, set the
CI Gas Flow (%) to 0.
See also: Turning off CI gas on
page 3-30.
Component hardware troubleshooting
2-2.
11-7