biodex ATOMLAB 500, Operation And Service Manual, Page: 100 / 212

Figure 6.45. The Manual Decay Test Parameters Screen.
2.
Select the variance calculation method, either <Use a Normalized Reading> or
<Averaging Method>.
If the user selects <Use a Normalized Reading>, the normalized reading is selected
at the end of the test. However, if the user selects <Averaging Method>, the system
performs the averaging calculation once the test is ended.
3.
Touch <Accept> to go to the Manual Decay Test screen.
4.
The Test Ends Below field defaults to 30 µCi. This can be changed by touching the
<
▲
> and <
▼
> keys to enter the activity at which the test should end. This number
can be between 10 and 50 µCi.
5. Touch <Accept> to return to the Manual Decay Test screen with the new variance
calculation method selected, or <Cancel> to return to the Manual Decay Test screen
without selecting a new calculation method.
To Perform A Manual Decay Test:
1.
From the Linearity Testing Menu, touch <Manual Decay Test>. The Manual
Decay Test screen is displayed.
Figure 6.46. The Manual Decay Test Screen.
•
Touch <Back> to return to the Linearity Testing screen.
•
Touch <Select Isotope> to select the isotope to be used in the decay test. The
test will default to the isotope Tc-99m.