CALIBRATION AND NORMALIZATION
PerkinElmer Life and Analytical Sciences 125
Do Chi-Square Test for Carbon-14?
Mark this box to enable a test that measures the degree of reproducibility for
sample counting for Carbon-14. If the Chi-Square value for a Carbon-14 standard
counted 20 times falls within an acceptable range of values, the variation in
individual sample counts is a result of the count statistics of the sample, as
opposed to an instrument problem.
Note: The range of acceptable values for the Chi-Square test is
based on a 95% confidence level. Therefore, statistically, one out
of every twenty Chi-Square tests could fail.
RS-232 Transmit IPA Data?
Mark this box if you would like to transmit the IPA data to an external device, via
the RS-232 communications port.
Save IPA Data to Text file
Check this box and then enter a filename in the box below to save Instrument
Performance Data to a file.
# of Datapoints to Establish Baselines
Enter the number of IPA runs you would like to use to generate baselines for
Tritium and Carbon-14 background and efficiency. The range for this value is
between five and 99. The default setting is five.
Tritium Background Mean and Limit
The instrument calculates the mean value for Tritium background from the
number of IPA runs (datapoints) specified. The limit is calculated as the baseline
+ 4 standard deviations. When the limit is reached, a message is displayed in the
main window.
Carbon-14 Background Mean and Limit
The instrument calculates the mean value for Carbon-14 background from the
number of IPA runs (datapoints) specified. The limit is calculated as the baseline
+ 4 standard deviations. When the limit is reached, a message is displayed in the
main window.
Tritium Efficiency Mean and Limit
The instrument calculates the mean value for Tritium efficiency from the number
of IPA runs (datapoints) specified. The limit is calculated as 3% below the
baseline, or less than 58% efficiency. When this limit is exceeded, a message is
displayed in the main window.
To Next Page
Loading...
