Fluke Biomedical 956A-201-M2 - Manual (Page 38)

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The unit will only read jumper selection on power-up; therefore,
the unit must be turned off when changing jumpers.
Microprocessor Reset
Jumper JP1 permits local reset of the microprocessor without cycling AC power.
PROM Type
Jumper JP2 must be installed in position 2-3 for use with the 27256 PROM installed.
Count Time Selection (Statistical Accuracy)
The statistical accuracy jumpers JP3-1 & JP3-2, are not implemented. This statistical accuracy, count
time and consequently, the update time of the display are fixed. The unit is shipped from the factory with
both JP3-1 and JP3-2 installed, resulting in a displayed value that is the sum of 60, one second values,
updated once per second.
Alarm Reset (Acknowledge)
1. JP3-3 OUT - The unit resets alarm indicators and alarm relays after the radiation value falls below the
setpoint without regard to the alarm acknowledge pushbutton.
2. JP3-3 IN - The unit maintains the alarm indicators and alarm relays in the alarm state until the alarm
acknowledge pushbutton has been pressed and the radiation value falls below the setpoint. If the
alarm acknowledge pushbutton is pressed while the radiation value is still above the setpoint, the
flashing indicator will go to a steady state ON condition.
The UDR is normally shipped from the factory with JP3-3 installed.
No Counts FAIL Alarm
JP3-4 IN - The unit will go into a FAIL mode after five minutes with no counts from the detector.
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 installed.
Inhibit Alarms (Check Source Operation)
1. P3-5 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
Jumper JP4 is set to position 2-3 for G-M detector inputs. Position 1-2 is provided for use with other
detectors.
Input Shield Polarity
Jumper JP5 is set to position 2-3 for G-M detector inputs. Position 1-2 is provided for use with other
detectors.
NOTE