VS Series Helium Mass Spectrometer Leak Detectors
2-12
DRAFT 4/
23/15
2.2.3 Control Panel Screen
❑ Press Control Panel on the Home screen. The Control Panel screen appears
(
Figure 2-4).
Figure 2-4 Control Panel
Std Leak Opens the standard leak valve so the leak can be seen by the
system.
The Std Leak button is only functional while the leak detector is in
fine test and activates the internal calibrated leak, allowing verifica
-
tion of the system calibration. When the system is in Std Leak
mode, Std Leak appears on the Home screen.
The Std Leak button isolates the test port from the system and
exposes the leak to the spectrometer. This allows you to compare
the displayed leak rate value to the calibrated leak value on the
System Information screen to verify proper system operation.
Because the test port is isolated from the fore pump in this mode,
a
slight increase in test port pressure may be indicated on the test
port pressure display.
Zero Enable Turns on or o f f the zeroed o u t backgroun d . T his feature e x c l u d es
the background leak from the leak rate signal.
Helium background represents helium that is in the system but
does not come from the part under test. If the background is zeroed
out, a more accurate measurement of the leak rate of the part is
determined. If Zero Enable is turned ON, the background is
excluded; if it is turned OFF, the system displays the full helium sig
-
nal, including total background.
C
CONTROL PANEL
STD LEAK
✔
✕
EXTERNAL LEAK
ZERO ENABLE
✔
✕
DONE
+-
HOLD
CALIBRATE
012345678910
Press the [+]
or [-] buttons to
adjust intensity.
Displays the
configured
leak type.
To ggl es t hese
options on/off.
Engages/disengages
Hold
Runs the selected
calibration type
To ggl es vol um e
on/off.
Press to
open the
Graphical
Display
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