
LS 6000 Scintillation System User’s Manual
PN 247971-F
3-9
Counting Samples
Multi-Task
3
NOTE The Calibrate Rack must contain the unquenched l4~ standard in position #1 and the unquenched ~
standard in position #2. Standard DPM and the date of standardization of the unquenched standard used for
Auto DPM Calibration must be stored under System Setup.
Counting With Auto DPM
Counting in Auto DPM is similar to Automatic Count. Refer to Section 3.2 if you are not
familiar with counting in the automatic mode. Place your samples to count in the Auto DPM
Rack. Refer to Setting Up the Racks Section 2 for information on setting up the Auto DPM
Rack. Place remaining samples in Sample Racks that do not have a User Number Card
installed on them.
For Auto DPM Calibration, place the Calibrate Rack set up as described in Auto DPM
Calibration Section 3 in the instrument so it is the first rack to be counted. Place the Auto
DPM Rack after the Calibrate Rack. Place the remaining Sample Racks into the instrument.
Place a Halt Rack after the last sample and initiate Automatic Count. A typical printout of the
results is shown in Figure 5.6.
3.5 Multi-Task
Multi-Task allows you to obtain an immediate count of a small number of samples (a
maximum of one full rack) using Count Single Rack mode, to edit a User Program, or to
manually set up a new isotope or quench curve (if DPM is installed). The counting process is
terminated only when you initiate counting samples in Interrupt Count.
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