biodex ATOMLAB 500 - Linearity Automated Decay Test

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160 ATOMLAB 500 DOSE CALIBRATOR
14. Touch <End Test> once enough decay points have been recorded to end the test. The
system automatically takes a final reading and ends the test when the activity is below
10 µCi. Once the test has ended, the system allows you to <Select Normalized Reading> and
change which reading is selected as the normalized value. The Count time measured closest to
the normalized reading time will be highlighted to be used as the normalized reading.
You can highlight to change what will be used for the normalized reading by touching to
highlight a different reading.
15. Touch <OK> to accept the reading and return to the Automated Decay Test screen. The
screen now shows that the test has ended. If you touch <Back>, a prompt is displayed noting
that recorded data will be lost. Touch <Yes> to discard the data. Touch <No> to return to the
test ended screen.
16. Touch <Save Data> to save the data.
17. If the appropriate technologist is not displayed, touch <Technologist>. The Technologist List
is displayed. Touch to highlight any listed technologist. (If you have previously selected a
technologist, the system will default to that technologist on the Automated Decay Test
screen.) Then touch <Save Data> again to save the data in memory.
18. Touch <Print> to print the data from your linearity test.
19. Touch <View Data>, then touch <view decay plots> to plot your linearity results. Now touch
<Print> to print the decay plot with the data.
20. Touch <Back> four times to return to the Linearity Testing screen.
Linearity Automated Decay Test
WARNING: There are several important items to know when using the
Automated Decay Test.
1. There are a maximum of 24 readings for the Automated Decay Test. The test will stop after
the 24th reading, regardless of the activity reading. It will also stop when the reading drops
below 10 µCi’s.
WARNING: NORMALIZED READING is traditionally set to the middle linearity measurement.
This is the measurement that pre-calibration and post-calibration factors are applied to for
determining the calculated activity. Some users set the 1st reading as the normalized
reading.
2. The Automated Linearity Test will end automatically when the activity reading falls below 10
µCi’s.
3. If you choose a normalized reading that occurs after the 10 µCi reading, the system will
automatically select the middle reading as the normalized value.