From time to time you may wish to check the Calibration
Values of the standard Isotope Selection keys. With Appendix
D before you, press SETUP and then press the standard
Isotope Selection keys, comparing the settings on the
Electronic Thumbwheel Display with values in the appendix.
Pressing SETUP again takes you out of Setup mode.
CONTAMINATION CHECKS
To ensure that your Sample Holder is not contaminated,
perform the following steps.
1) Remove the Sample Holder from the Detector.
2) Ensure that the Activity Display reads less than ±0.05
µCi or (MBq). If not, use the BKGND key to correct for
the change in background radiation.
3) Place the Sample Holder into the Chamber Well.
4) Press the Mo-99 key. If, after the 30-second countdown
on the Electronic Thumbwheel Display, the activity is
>2µCi, set the sample holder aside. Repeat the test
{steps 1) through 3)} the next day or after a weekend. If,
after the repeat test, the activity is still >2µCi or greater,
you need to order a replacement Sample Holder
because of contamination.
5) If the activity is < 2µCi, place the Sample Holder back in
the Chamber Well and, if the activity value now reads
greater than 0.05 µCi, again press the BKGND key.
Repeat the above procedure, but only remove and replace
the Well Liner.
ATOMLAB Dose Calibrator Operation Manual Chapter 5
Biodex Medical Systems 5-9 Release 2.0
Checking the
Standard Keys
Sample Holder
Check
Detector Liner
Check
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