Thermo Scientific SAM12, Manual

Page: 26 / 176

Description Issue: 1.0
2-4 SAM12 User Manual Thermo Fisher Scientific
and five associated counters, all controlled by the
microprocessor on the main board.
The cards are interrogated via the X-channel bus to retrieve
counter values generated every 100ms from a 5 second buffer.
A digital output from each channel is fed to the CCM card, type
42543-0224, such that coincidence on any two detectors can be
registered. This allows measurements on Cobalt 60.
FHT681 Coincidence Detector Card Type
42543-0224
The card can support coincidence from 6 detectors via the
digital outputs of the HV Amps. By setting relevant summing
thresholds on the card, coincidence from two detectors only can
be supported.
The cards are set up and interrogated via the X-channel bus.
Visual Indicator LED PCB Type 5672A
This assembly provides the rear (and front optional) visual
display necessary to inform the user of progress through the
instrument.