Fluke Biomedical 956A-201-M2 - Manual (Page 75)

4-3
4.4 955A SYSTEM FIELD CALIBRATION
A field test source is available to verify the response of the detector to a known radioactive field in a fixed
geometry. The following test sources are available:
Model Activity
848-8 100
mCi Cs-137
848-8A 10 mCi Cs-137
848-8B 20 mCi Cs-137
848-8 Test Source provides tree data points when used with the 897A-22X or 897A-23X detector. Two
points are available when used with the 897A-21X, low range detector. Should a third data point be
required for the 897A-21 X detector, use of the 848-8A Test Source is required.
The following adapters are required to use the above test sources:
Detector Adapter
897A-210 848-8-105
897A-220 848-8-105
897A-230 848-8-105
897A-211
848-8-105 & 848-8-400
897A-221 848-8-105 & 848-8-400
897A-231 848-8-105 & 848-8-400
Extreme care must be used when testing a system that has
power applied. A 600 Vdc potential exists on terminal P1-E of the
detector and P4 of the 956 UDR. This potential will exist for one
minute after power is removed.
For WARNINGS and CAUTIONS pertaining to the use of the
Model 848-8 field calibrator, refer to the applicable field calibrator
instruction manual.
Voltages can be measured as soon as power is turned on, but
further alignment should not be attempted until the instrument
has had at least one hour to stabilize after startup.
The following procedure applies only to an 897A series detector
that has been previously calibrated and is functioning normally.
WARNING
CAUTION
NOTE
NOTE