Fluke Biomedical 956A-201-S1 - Manual (Page 11)

Operation
Operation
4
4-1
Section 4
Operation
4.1 Operation
The UDR Simulator displays an mR/h value based on input voltage. Alarms and analog outputs operate
as they would in a normal, area radiation-monitoring channel. High and Alert alarms are factory
configured to require manual, or operator, reset. If automatic reset of the High and Alert alarms is desired,
configuration jumper JP3-3 must be removed. The Table below shows the expected UDR Simulator
radiation display values for input voltages based on a conversion constant of 6.25-1.
Signal Converter
Input
Signal Converter Output/ UDR Input UDR Simulator Display
-10 VDC 0 VDC 0.01 mR/h nominal
- 6 VDC 2 VDC 0.10 mR/h
- 2 VDC 4 VDC 1.0 mR/h
+2 VDC 6 VDC 10 mR/h
+6 VDC 8 VDC 0.10 R/h
+10 VDC 10 VDC 1.0R/hr to EEEEE *
* Over range is 1.00E3 mR/h
Fine span adjustment of the UDR Simulator display is accomplished through potentiometer R1 on the
942-200-75 Analog Input Option circuit card. The Signal Isolator is also provided with zero and span
adjustment potentiometers.
Refer to the 955A Standard Manual for UDR display features, alarm function/logic and operator
interfaces.