Log entry time 17:24:36 on February 15, 2011

Entry number 347052

I tracked down a bug in the halla_scaler_process.tcl that obtains and 
displays the scaler summary for the end of run file.  The deadtime has been
100%.  I found this was due to the ability to disable a trigger with the
prescale factor of '0'.  The way the deadtime is calculated is the script
uses the ts-accept scaler and sums the triggers from the scalers weighted
by the prescale factor.  When the prescale factor is set to '0', the code
unforatunately inflated the expected events for that trigger causing the
deadtime to become infinite.

I added an "if" statement to check for prescales of '0'.  If the trigger is
disabled, then it is ignored in the deadtime calculation now.  I tested 
this for the last run 1389 and got the expected deadtime based on the 
number of accepted events and T7 scalers, since only T7 was active.