CHAPTER 9
180 PerkinElmer Life and Analytical Sciences
Warning: questionable C-14 chi-square value-please view historic
data.
The Chi-Square result is outside the range of 7.63 to 36.19.
Verify the integrity of the Carbon-14 spectrum via the SpectraView window.
Repeat the Chi-Square test. If the result falls outside the range on the repeat test,
call PerkinElmer Technical Service.
Warning: questionable C-14 figure of merit value-please view historic
data.
Check the Figure-of-Merit threshold value. Clean the Carbon-14 and background
sources and repeat the test. Check the efficiency and background values for
Carbon-14. If these values are within specifications, call PerkinElmer Technical
Service.
Warning: questionable H-3 background value-please view historic
data.
Check that the correct background sample is in cassette position number 3. The
detector may be contaminated, or light is leaking into the detector. Review the
historic IPA data. Call PerkinElmer Technical Service.
Warning: questionable H-3 chi-square value-please view historic data.
The Chi-Square result is outside the range of 7.63 to 36.19.
Verify the integrity of the Carbon-14 spectrum via the SpectraView window.
Repeat the Chi-Square test. If the result falls outside the range on the repeat test,
call PerkinElmer Technical Service.
Warning: questionable H-3 efficiency value-please rerun quench
curves and view historic data.
The Tritium source failed the IPA check and the tSIE value for the source is less
than 950.
Check that the correct source is being used in sample position 2 of the SNC/IPA
cassette. Check for dirt on the Tritium standard. Check the DPM value entered in
the IPA Definitions window. Review the historic IPA data. Rerun the quench curve.
Call PerkinElmer Technical Service.
Warning: questionable H-3 efficiency value-please view historic data.
The Tritium source failed the IPA check.
Check that the correct source is being used in sample position 2 of the SNC/IPA
cassette. Check for dirt on the Tritium standard. Check the DPM value entered in
the IPA Definitions window. Review the historic IPA data. Call PerkinElmer
Technical Service.