biodex ATOMLAB 500, Operation And Service Manual, Page: 103 / 212

12. Touch <Measure>to advance to the Dose Calibrator Measure screen.
13. Touch <Back> to return to the Manual Decay Test screen.
14. Touch <Back> a second time to return to the Linearity Testing screen.
Semi-Automated Manual Decay Test
Figure 6.51. The Semi-Automated Decay Test Screen.
The Semi-Automated Decay Test allows the user to begin a linearity test using the
automated test method while the activity level is high and switch to the manual test method
to complete the test. This method prevents changing background levels from greatly
affecting the reading at low activity values. The switchover to manual mode defaults to 100
µCi. The switch from auto to manual can be set from 50 µCi to 500 µCi.
To Perform A Semi-Automated Decay Test:
1.
From the Linearity Testing menu, select <Semi-Automated Decay Test>. The Semi-
Automated Decay Test screen is displayed (see Figure 6.51).
2.
Touch <Select Isotope> to select the isotope to be used in the decay test. The test will
default to the isotope Tc-99m.
3. Select <Set Test Parameters>. The Semi-Automated Decay Test Set Test Parameters
screen is displayed. From this screen the user can set the reading interval and set the
time until normalized reading. Touch to highlight the desired setting and use the <
▲
>
and <
▼
> keys to adjust the value.
Figure 6.52. Semi-Automated Decay Test Parameters Screen.