Model 4525 Gate Monitor
Operator’s Manual
Ludlum Measurements, Inc.
Page 46
May 2018
Threshold:
Sets the lower threshold set point for each panel. Refer to the RPM
calibration procedure for information on how to set these values properly. After
changing the lower threshold, the RPM should be rebooted.
Window:
Sets the upper threshold set point for each panel. Refer to the RPM
calibration procedure for information on how to set these values properly. After
changing the upper threshold, the RPM should be rebooted.
System Size:
Sets the detector configuration. Typically this parameter will
never have to be changed. The system size is determined by the total cubic
inches of the detector panels. Refer to the RPM calibration procedure for
information on how to set these values properly. After changing the high
voltage,
the
RPM
should
be
rebooted.
2-Channel energy discrimination:
Enables the configuration of a gamma
high and gamma low channel and allows alarms to be set based on a net ratio.
Enable Neutron:
When checked, detectors 3, 6, 9, and 12 are designated as
neutron detectors.
Detector Panels:
Sets which detector panels are enabled. A failed detector
panel can be disabled, allowing the RPM to continue functioning until the panel
can be repaired. After changing the number of enabled detector panels, the
RPM should be rebooted.
Application:
When set to security, the percent alarm is disabled automatically.
