
LS 6000 Scintillation System User’s Manual
PN 247971-F
5-1
Data Calculation
Introduction
5
5
Data Calculation
5.1 Introduction
The Data Calculation programs are divided into two groups depending on the type of
scintillator selected in the User Pro-gram. When Xtal is selected as the scintillator, Xtal
precedes the Data Calculation program. The following Data Calculation programs are
provided.
CPM/Xtal CPM
For each sample count, divides total counts by counting time and records the resulting
counts per minute
Single Label CPM % of Reference/Xtal SL % of Reference
Divides the result of each sample count by the count obtained from a reference sample, and
records the cpm results as well as the percentage of the reference
Single, Dual or Triple Label DPM/Xtal SL DPM
If installed, corrects for counting efficiency to produce results that represent the actual
number of disintegrations per minute in the sample
Single or Dual Label DPM % of Reference/Xtal SL DPM % of Reference
If installed, corrects for counting efficiency to produce results that represent the actual
number of disintegrations per minute in the sample and records the dpm results as well as the
percentage of the reference
Auto DPM
Corrects for counting efficiency to produce results that represent the actual number of
disintegrations per minute in single label samples of a pure beta emitting isotope without the
need for quench curves
Single Photon Monitor
If installed, provides counting of single-photon events, such as occur in chemilumlnescence
or bioluminescence studies
In addition to calculation program, Data Calculation provides the following capabilities:
r Half-life correction of the samples to any date
r Repeated counts of each sample to minimize statistical variation
r The use of replicates to minimize experimental variation
r Number of times to count the sample set to minimize statistical variation
r The use of a multiplying factor to normalize results for each Isotope
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