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User name fansler
Log entry time 11:23:27 on December 19, 2007
Entry number 222126
keyword=Left Q1 Trips on He level
The left Q1 tripped on low He level. This is the same problem we've been
having for the last few days. We had to power cycle both the power supply
and the Saclay rack to clear all faults. We notified cryo prior to power
cycling the Saclay rack, as this sends their liquid level readback signal
to zero, and can cause an ESR crash if they are not ready for this
interuption. Repairs for this circuit are scheduled for tomorrow
morning. Cryo is adjusting our PID loop to increase the liquid level and
compensate for the readback problems.
A copy of this log entry has been emailed to: fansler@jlab.org