LB 9507 Chapter 6: CUT-OFF-Measurements
6-7
option you want. Press <enter> to use the response displayed in
the upper-right corner of the LCD. The following display is shown:
C9
07: DELAY TIME INJ 1/INJ 2 1.2
(0.7 - 300.0) LAST DISPLAY
Enter the desired delay in seconds between both injections and
confirm with <enter>.
C10
07: MEASURE BACKGROUND NO
YES NO LAST DISPLAY
Select here whether the background rate is to be measured prior
to the injections.
If you select <NO>, display C14 appears.
<YES> takes you to the next display:
C11
07: MEASURING TIME BKG [s] 0.5
(0.1 - 200.0) LAST DISPLAY
Enter between 0.1 and 200.0 seconds for the background
measurement and press <enter>. Reasonable times start at half
a second, allowing statistical variations to be compensated for.
Otherwise, the background values may be too high or too low
which either distorts the result of the measurement or leads to an
exceeding of the threshold. Remember that the background effect
is measured in order to obtain an alarm threshold for background
rates that are too high, as with phosphorescence for example.
C12
07: AUTOMATIC BKG SUBTRACTION NO
YES NO LAST DISPLAY
Here you can select whether the background effect is to be
subtracted automatically from the measured results.
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