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176 ATOMLAB 500 DOSE CALIBRATOR
Lineator Initial Test
(See Figure 6.47.)
Figure 6.47. The Lineator Initial Test screen.
The first time the Lineator is used with this dose calibrator, initial factors for the Lineator
function must be set and the Atomlab 500 must be calibrated for the specific Lineator package
using the initial procedure described below. The Atomlab 500 will store the initial factors and
print them in the initial factor column of the results table.
The initial Lineator Test needs to be performed only once unless the Lineator is replaced or
damaged, in which case the initial factors will need to be redone. The Atomlab 500 procedure
allows recording of two initial linearity tests - one less than 55 mCi and one greater than 55
mCi. The Lineator does not have a wide enough range using the tube combinations to obtain a
minimum reading of less than 10 µCi when starting with an activity greater than 55 mCi. Using
two linearity ranges allows the user to obtain a maximum reading in excess of 500 mCi to less
than 10 µCi.
NOTE: Your initial test and future tests should all start with similar starting activities. Variation
in starting activities can cause variance in results.
NOTE: Some state regulations allow linearity tests to end at activities greater than 10 µCi. You
may discontinue the linearity test at the activity which your state regulations or license permit.
NOTE: You must perform a traditional linearity test at the time you are doing your initial
Lineator Test to prove the calibration is linear. If you perform the Lineator Test first and then the
traditional test, you can perform both tests with one source.
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