
LS 6000 Scintillation System User’s Manual
PN 247971-F
5-9
Data Calculation
DPM
5
Single Label DPM uses either IC# or H# Plus (if installed) as the quench monitor. AQC must
be off. Color Quench Correction (if installed) automatically corrects for single label, colored
samples when H# is selected and one of the five factory stored Isotopes is chosen as Isotope 1.
Refer to The DPM Library Section 6 for more information on Color Quench Correction. Dual
and Triple Label DPM always uses H# Plus as the quench monitor. AQC is On. Color Quench
Correction is not used for Dual or Triple Label DPM.
The DPM Library stores quench curves for the Isotopes used to determine dpm results. A
single label
3
H quench curve, a single label
3
H quench curve, and a dual label
3
H/
14
C quench
curve are stored in the DPM Library at the factory. Refer to Section 6.2 for more information
on the DPM Library and setting up other quench curves.
Once the quench curves are stored in the DPM Library, they are accessed by any User
Program and used to calculate the dpm. When selecting a DPM program, a quench curve
must be stored in the DPM Library for the selected isotope. If using Dual or Triple Label
DPM, the quench curves stored must have been set up as dual or triple label curves.
Setting Up DPM
When editing a User Program, from the Data Calculation Menu (Figure 5.1), choose SL DPM,
DL DPM or TL DPM. The menu displayed for DL DPM is shown in Figure 5.7. The prompts
for Units and Isotope Ratio (for Dual or Triple Label DPM) are discussed below. The other
prompts are the same prompts described for the CPM program. Refer to Setting Up CPM/Xtal
CPM Section 5 for information on setting these prompts.
If a quench curve for the selected isotope(s) is not stored, an error message is displayed when
the User Program is stored. Return to the Data Calculation Menu and choose CPM. Press
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