Waters GCT Premier Operator's Manual page 300

The EI Tune tab
EI Tune tab:
EI Tune tab parameters:
Parameter
Detector Voltage
B-22 The MassLynx Tune window
Description
Sets the voltage across the detector. The default
value is 2700 V, which provides a beam. However,
for accurate mass this value must be set correctly.
Setting the optimum gain for the
See also:
detector on page 10-52.