[Hallb-engineering] [New Logentry] Solenoid Magnet Reservoir Pressure Control

kashy at jlab.org kashy at jlab.org
Wed Dec 13 11:30:02 EST 2017

Logentry Text:
The solenoid fast dumped while we were looking at the helium level control. the magnet reservoir went to 1.74atm and the relief setpoint is 2.0 so this was close. If we were at higher current we would have poped the PPRV (parallel plate relief valve). We changed the PID settings of EV8670BY and BY_Min to make the valve open faster and make the minimum position higher so it can't fully close. This will have two effects. During steady running the shields will likely run a bit warmer, so we turned on HIHI alarms for TR8672and 73 at 60K just to be sure we notice and if needed we can change the min lower than 25. 


This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3503700
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