CAPINTEC, INC. CAPRAC
®
-t
8-2 ACCEPTANCE & QUALITY ASSURANCE TESTS April 2021
Contamination Test
This test is normally performed at the end of each workday. At the very least, it should be
performed once per week. To test for contamination of the Well Counter liner:
1. Make sure that the liner is in the Well Counter and there is no source in the liner.
2. Perform a Background measurement.
3. When counting is completed, record the displayed reading.
4. Remove the liner from the Well Counter
5. Perform another Background measurement.
6. When counting is completed, record the displayed reading.
7. Subtract the activity in step 6 from the activity in step 3. This is the amount of
contamination of the liner.
8. Should the liner exhibit contamination greater than 25% of the normal Background
measurement, the liner should be decontaminated or replaced.
CAUTION: Never use the Well Counter without the liner being in place. Liners are
inexpensive and easy to replace. A contaminated Well Counter is a very