CHAPTER 9
176 PerkinElmer Life and Analytical Sciences
Normalization error-both tubes SIS.
The count rate in both photomultiplier tubes is too low.
Check that the unquenched Carbon-14 source is in sample position 1 in the
cassette. Call PerkinElmer Technical Service.
Normalization error-EXT STD.
The external standard is not loading properly.
Call PerkinElmer Technical Service.
Normalization error-left PMT LCR.
The count rate in the left photomultiplier tube is too low.
Check that the unquenched Carbon-14 source is in sample position 1 in the
cassette. Call PerkinElmer Technical Service.
Normalization error-left PMT SIS.
The left photomultiplier tube detected inappropriate beta energy.
Check that the unquenched Carbon-14 source is in sample position 1 in the
cassette. Call PerkinElmer Technical Service.
Normalization error-right PMT LCR.
The right photomultiplier tube detected inappropriate beta energy.
Check the unquenched Carbon-14 source is in sample position 1 in the cassette.
Call PerkinElmer Technical Service.
Normalization error-right PMT SIS.
The right photomultiplier tube detected inappropriate beta energy.
Check the unquenched Carbon-14 source is in sample position 1 in the cassette.
Call PerkinElmer Technical Service.
Not normalized.
The instrument has not been normalized.
Perform the calibration procedure before counting any samples.
Power fail.
The system has recovered from a power failure.
Check your sample results for missing data.
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