CALIBRATION AND NORMALIZATION
PerkinElmer Life and Analytical Sciences 131
SNC for an Instrument without Super Low Level Counting
This procedure is intended for those systems that DO NOT have the BGO detector
guard. After defining the IPA parameters:
To run the SNC/IPA protocol, regardless of how long it has been since it last ran,
reset the SNC protocol flag to the “reset position (the flag is all the way to the left
when the flag is on the left end of the cassette). If the protocol flag is not “reset”,
the SNC/IPA protocol will only run if 23 hours have elapsed since the last time
that the protocol was run.
Note: The cassette must be loaded in the following order:
Figure 7-4 Standard SNC/IPA Cassette Loading.
8. Load the purged, unquenched Carbon-14 standard (supplied) into the first
position of the cassette (this is at the same end as the protocol flag).
Caution: Do not use the unpurged, Low Level standards to
calibrate the instrument, even if the instrument is to be used in
Low Level, High Sensitivity or Super Low Level count mode.
9. Load the purged, unquenched Tritium standard (supplied) into the second
cassette position.
10. Load the purged background standard (supplied) into the third cassette
position.
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