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User name silwal
Log entry time 06:15:06 on August27,2009
Entry number 286207
keyword=Switching between Integrating and Counting DAQ (on happex det)
Counting House to Right Arm MAP on the patch panel
Integrating DAQ: #12
Counting DAQ: #16
Counting House to Left Arm MAP on the patch panel
Integrating DAQ: #10
Counting DAQ: #11
The HAPPEX detectors, in each arm, go through a switch that can relay signals
between Integrating and Counting DAQ.
To switch between the Integrating and Counting DAQ, apply about +12.5V on the
patch panel input # that corresponds to the mode we want to switch to. For
instance, if we want to run in Counting mode in the right arm, then apply about
+12.5 V on patch panel #16 on the counting house to Right arm patch panel.
There is a power source by the patch panel, with voltages appropriately set,
and cabled for this purpose. We should ensure that the voltage setting is
NOTE: Dont apply the voltage into the patch panel for much longer than a couple
of seconds. The switch filps instantly with voltage application and stays in
that state unless flipped again. If you leave the voltage on for much longer,
then there is a possibility of switch failure due to thermal exhaustion!