CAPINTEC, INC. CAPRAC
®
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April 2021 TESTS 9-17
Count Time
The default counting time is 60 seconds. If it is desired to use a different counting
time, touch the COUNT TIME button. Figure 9-14 Numeric Keypad Screen will
appear.
Figure 9-14 Numeric Keypad Screen
Input the desired counting time (in seconds) by touching the appropriate numbers on
the keypad. Touch the ACCEPT button to accept the entered time. Touch the
CANCEL button to abort any changes.
Counting the MDA Background for 60 seconds or longer is recommended.
Note: The minimum count time that can be input is 2 seconds. The maximum count
time that can be input is 30,000 seconds.
Verify that there are no sources in the area and begin the MDA Background
measurement by touching the MEASURE button. The system will begin measuring
the Background and a live spectrum of the acquired Background, the Real time, Live
time and the counting rate (total cpm) will be displayed and updated. Also, the
MEASURE button will be replaced with a STOP button. At any time during the
measurement, touch the STOP button to stop the measurement. To re-start the
process, touch the MEASURE button.
When the measurement is finished, the background counting rate is displayed and
the message “FINISHED” will appear on the screen below the MEASURE button as
shown in Figure 9-13 Background Measurement Screen.
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