PerkinElmer QuantaSmart 1694267

CALIBRATION AND NORMALIZATION
PerkinElmer Life and Analytical Sciences 129
Tritium Background Baseline
This chart displays the Tritium background data based on a fixed baseline value.
The number of values used to generate the baseline is defined in the IPA
Definition window. The default for this setting is five.
Tritium Chi-Square
This chart displays the results of the IPA test that measures the reproducibility of
sample counting for Tritium. The test is performed by counting a single sample in
the detector 20 consecutive times with a count time of 30 seconds for each repeat
measurement. The normal range for this value is 7.63 to 36.19. with 95%
confidence. A properly performing instrument may generate Chi-Square values
outside this range 2% of the time, due to the statistical nature of the test. The
mean and standard deviation for this parameter are recalculated as new IPA data
are generated.
Tritium Efficiency
This chart displays the results of repeated Tritium efficiency determinations. The
mean and standard deviation for this parameter are recalculated as new IPA data
are generated. The limit for this parameter is < baseline minus 3%.
Tritium Efficiency Baseline
This chart displays the Tritium efficiency data based on a fixed baseline value. The
number of values used to generate the baseline is defined in the IPA Definition
window. The default for this setting is five.
Tritium Figure of Merit
Figure of Merit (FOM) is a measure of the sensitivity of the instrument for Tritium
based on the Tritium background and the instrument’s counting efficiency. The
mean and standard deviation for this parameter are recalculated as new IPA data
is generated.
Tritium Background
This chart displays the results of the IPA test for Tritium background counts. This
test checks for detector contamination or light leaks. The limit for this parameter
is > baseline + 4 standard deviations. The mean and SD for this parameter are
recalculated as new IPA data are generated.
Total # of Points
This field indicates the total number of data points available for the selected IPA
parameter.
Mean
This field displays the Mean value of the selected IPA parameter as calculated
from all the included data points. A deleted data point is not used to determine
the mean value of the IPA parameter.