Fluke Biomedical 956A-201-M2 - Manual (Page 84)

5-6
Counter Test
1. Set-up signal generator as follows:
1. Square Wave pulse
2. Volt peak positive pulse
3. DC offset: at ground reference
4. 10 Hz
2. Connect the signal generator to connector J5 on the 956A readout.
3. Set the conversion constant on the readout, function switch position 5, to 1.00EO
4. Adjust the signal generator to the following frequencies and verify the 956A readout display.
Signal Generator Output 956A Readout Display Value
0.01 Hz .600 mR/h ± 5%
0.10 Hz 6.00 mR/h ± 5%
1.00 Hz 60.0 mR/h ± 5%
10.0 Hz .600 R/h ± 5%
100.0 Hz 6.00 R/h ± 5%
1000.0 Hz 60.0 R/h ± 5%
897A-2XX G-M Detector Test
The only field test to verify G-M Detector and preamplifier operation is the check source test described
earlier for the 955A-XXYYZ system.
Detector Troubleshooting
The following section describes the internal adjustments and troubleshooting information for the 897A
Detector. Since internal adjustments or component replacement will usually require detector calibration on
a NIST range, field disassembly and troubleshooting is not recommended.
Detector Disassembly (Factory only)
An
8 µCi chlorine CI-36 radioactive check source is mounted
inside of the check source housing. Safety glasses must be
worn to protect the eyes when close visual contact with the
preamplifier circuit board is necessary. Consult the facility
radiation safety officer prior to disassembly of the detector to
ensure the appropriate radiation safety procedures are
observed.
Ensure that the detector power has been removed prior to
disassembly.
WARNING
WARNING