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LS 6000 Scintillation System User’s Manual

PN 247971-F

3-3

Counting Samples

Conducting Count Single Rack

NOTE If your samples have already been placed in the sample changer, you may simply press START after

selecting Automatic Counting on the Main Menu.

During Automatic Count, pressing the two RESET keys simultaneously terminates the

counting process and returns the LS to Standby. The STOP COUNT key is used to terminate

the counting of the current sample. The system prints the data accumulated up to the time of

termination and advances to the next sample. Counting continues. The Halt Rack

automatically terminates counting after all the samples are counted.

Data is printed and/or transmitted to the RS232 port depending on the User Program setup

for Output Formats. Typical print-outs for each data calculation program are shown in

Section 5. For more information on the printout parameters, refer to Output Formats Section

To temporarily use the instrument during Automatic Count, press SELECT. The system is in

the Multi-Task mode. You may count a small batch of samples, edit or review a User Program,

or manually set up a new isotope or quench curve. Refer to Section 3.5 for more information

on Multi-Task. You may also count samples during Automatic Counting using the

INTERRUPT key. Pressing the INTERRUPT key presents the Count Single Rack Menu shown

in Figure 3.9. Refer to the instructions in Interrupt Count in Multi-Task Section 3 for

conducting an Interrupt Count.

3.3 Conducting Count Single Rack

Count Single Rack is especially useful for counting a single sample such as a blank standard

or a reference standard, or a few experimental samples (up to one rack). A count of the

sample can be obtained using a default program or a User Program.

Figure 3.2 Screen Displayed During Automatic Count

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 179 180

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Motorola LS6000B-U Betriebsanweisung Seite 41