Fluke Biomedical 945A - Manual (Page 40)

Digital Ratemeter Configuration Options
The UDR contains a series of five hardware jumpers and up to seven user specified set points which
affect operation of the unit.
The jumpers are designated as JP3-1 through JP3-5. Refer to the main circuit board assembly drawing
located in Appendix B of this manual for JP3 locations. The functions affected by JP3 are described in
the following paragraphs.
UDR Switch & Table Settings
Jumper and switch settings for setpoint selection for the UDR are summarized in Tables 4-6 and 4-7,
while error codes are listed in Table 4-8.
Jumper Selectable Options
NOTE
The unit must be turned off when changing jumpers.
Refer to Table 4-6 for a list of option jumpers and their functions.
With jumper JP3-3 (Alarm Automatic Acknowledge) installed, the operator is required to acknowledge the
HIGH and WARN dose rate alarms. With the jumper removed, the HIGH and WARN alarm will be
automatically acknowledged and will be cleared when the dose rate falls below the setpoint.
With jumper LP3-4 (Enable Fail Alarm) installed, the 5-minute low signal Fail Alarm is enabled. With the
jumper removed, the 5-minute low signal Fail Alarm is disabled. Note that other conditions which cause a
Fail Alarm are not affected by this jumper setting.
Table 4-6. Model 946A-200 Option Jumpers
Jumper Function Norm Position Operation
JP3-1, Not Defined in Not Applicable
JP3-2 Not Defined in Not Applicable
JP3-3 Alarm Reset Select in Manual reset with jumper installed
Auto reset with jumper removed
JP3-4 Fail Alarm Enable in Fail alarm enabled with jumper in
Fail alarm disabled with jumper out
JP3-5 Check Source Alarm Mute in Alarms disabled during C/S with
jumper in
Alarms enabled during C/S with
jumper out
4-16