PerkinElmer QuantaSmart 1694267, Reference Manual

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CALIBRATION AND NORMALIZATION
PerkinElmer Life and Analytical Sciences 133
SNC for Super Low Level Counting (with BGO detector guard)
This procedure is intended for those systems that are equipped with the BGO
detector guard (Tri-Carb
R
3170TR/SL). After defining the IPA parameters:
1. The SNC/IPA protocol will run every time that the protocol plug is recognized,
regardless of the state of the protocol flag or how long it has been since it was
last run.
Note: The cassette must be loaded in the following order:
Figure 7-5 Super Low Level SNC/IPA Cassette Loading.
2. 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 the
Super Low Level count mode.
3. Load an empty vial into the second cassette position. This is used to establish
the normalization spectrum for the BGO detector guard.
Note:The empty vial must be of the same type and material that
will used to count low level samples.