biodex ATOMLAB 500, Руководство по эксплуатации и обслуживанию, Страница: 105 / 212

10. Place the Tc-99m, or another short half-life isotope, into the dipper and place the dipper
with the source into the detector to perform the linearity test.
11.
Touch <Start Test> to record the first reading.
Figure 6.54.
The Semi-Automated Switchover to Manual Mode Screen.
The system will automatically show the isotope activity as it is decaying and the clock
time increasing from when the test began. The system will automatically take the
next reading, and the ones after that at the proper elapsed time, until the activity
set for automated Ends Below is reached.
12.
When the activity level set for automated Ends Below is reached, the system will
display a message that it is changing to manual readings. From that point, any
readings require the user to touch <Record Reading> to take the reading.
NOTE: Once the system switches to manual mode, remove the source and dipper from
the detector and perform a Zero Background before putting the source and dipper
back into the detector and recording a reading.
13.
Once the reading has stabilized after the source has been returned to the detector,
touch <Record Reading>. The reading is recorded and the next line for the manual
Semi-Auto- mated Decay Test is displayed. The system will continue to display a live
reading until <Record Reading> is selected.
Figure 6.55. Semi-Automated Decay Test Displaying Readings.
14. Continue taking readings at the appropriate time intervals by touching <Record
Reading>.