Granville-Phillips Series 330, Instruction Manual, Page: 34 / 76

4 Electrometer Module
34
Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
4.2.2 Display Update Rate Switch
Locate the Slow Update Switch See Figure 4-1. Set the switch to the ON position to enable pressure
averaging. The display will update about every 3 seconds rather than the normal 0.5 second typical
period.
4.3 Operation
4.3.1 Displaying Sensitivity, Pressure, and Emission with the Calibration Switch
The Calibration Switch (Figure 4-2) is a 3-position switch that is used to display gauge sensitivity,
pressure, or emission current. To display the sensitivity, set the switch to the left or to the right with
the ion gauge OFF. To display the emission, set the switch to the left or to the right with the ion
gauge ON. The center position displays pressure. The function of the switch depends on the state of
the ion gauge.
NOTE: If the CAL switch is not in the center position, the display will blink at
a two second rate in this mode to warn the user that pressure is not being
displayed.
Figure 4-1 Ion Gauge Electrometer Module Top View
Figure 4-2 Electrometer Module Front Panel