Fluke Biomedical 943-27 Detector - Manual (Page 17)

Maintenance, Calibration and Troubleshooting
Calibration
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Source: The activity is deposited on a 40 mm diameter Whatman #1 qualitative filter paper that is
bonded to a 0.51 mm thick stainless steel disc. The disc is sealed with a 2-mil Kapton window and
sealed into an aluminum mount. The overall dimensions on the source disc are 3.2 mm in height
and 47 mm in diameter
.
Calibration: To calibrate the detector, the small end cap on the source holder is removed,
exposing the internal radioactive source.
WARNING
”HIGH BETA RADIATION FIELDS”
Handle the sources with caution.
Direct the open end of the source holder away from personnel.
DO NOT Look at the Open Source.
Wear safety glasses.
DO NOT touch the source window.
Follow the following precautions when handling the source holder:
1. Remember that high Beta radiation fields exist when the end cap is
removed
2. Direct the open end of the source holder away from people.
3. Do not look directly into the end of the open source holder.
4. Wear safety glasses when using the source.
5. Do Not Touch the source window. The thin window is easily
punctured, directly exposing the source material.
6. The U.S. Nuclear Regulatory Commission requires a leak test of the
source every six (6) months.
7. The large end cap of the holder contains the radioactive source
capsule. DO NOT REMOVE.