Fluke Biomedical 942A-200L-M4 - Manual (Page 53)

Operation
Configuration Functions
3
3-13
No Counts Fail Alarm (JP3-4)
1. JP3-4 IN - The unit will go into a FAIL mode after five minutes with no counts from the detector.
2. JP3-4 OUT - The unit will not go into a FAIL mode when there are no counts from the detector.
The UDR is normally shipped from the factory with JP3-4 in. Note that other conditions which
cause a Fail Alarm are not affected by this jumper setting.
Inhibit Alarms (Check Source Operation JP3-5)
1. JP3-5 OUT - The alarms will become active during check source operation if alarm limits are
exceeded.
2. JP3-5 IN - Alarms are inhibited during check source operation, but if the unit is in an alarm condition
when the check source is activated, it will remain in the alarm condition.
The UDR is normally shipped from the factory with JP3-5 in.
Input Pulse Selection (JP4)
Jumper JP4 is set to position 2-3 for GM detector inputs. Position 1-3 is provided for use with other
detectors.
Input Shield Polarity (JP5)
Jumper JP5 is set to position 2-3 for GM detector inputs. Position 1-2 is provided for use with other
detectors.
Anti-Jam Selection (JP6)
Jumper JP6 is normally installed in position 1-2. Position 2-3 bypasses the anti-jam fuse for test
purposes. Removing the Jumper disables the anti-jam circuit for test purposes.
Detector Type (JP7)
Jumper JP7 is set to position 2-3 for a GM detector input. Position 1-2 provided for use with a scintillation
detector.