SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
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Volume 3 Menu Structure
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5 HV Mode The HV-mode (high-voltage control) provides the following options:
• AUTO
Automatic HV control Select this mode in normal measurement
mode. It enables a temperature-stable operation of the detec-
tor.
• MANUAL
Manual HV control This setting is used for testing purposes; you
can also provisionally set the operating point of the detector.
The specified voltage must, however, lie in the plateau.
If you select Manual, the automatic HV control is switched off.
The HV is then set to the value that was set in the menu item
HV Manual (8).
• PLATEAU
Starts the plateau measurement. If you select PLATEAU, the
measurement mode is exited and the plateau of the multiplier
measured, which is used in the detector. The plateau is mea-
sured using the settings in the menu Device Config Setup
Service Plateau.
At the end of the plateau measurement the detector automati-
cally switches back to HV Mode: AUTO or MANUAL, depend-
ing on which mode was last set.
6 HV Live Displays the current HV (high voltage) at the photomultiplier. If HV
Mode is set to AUTO (normal operation), the values in HV Live
must change, viewed over several seconds.
7 HV Average Shows the average HV (high voltage) of the last 10 days.
Significant deviations from HV Live to HV Average are considered
and reported as errors.
If you change HV Default, HV Average automatically takes over
the value from HV Default.
8 HV Manual You can enter a fixed HV value. The value becomes active when you
select MANUAL at HV-Mode.
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