Log entry time 06:15:06 on August27,2009

Entry number 286207

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 
correct anyways.
 
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!