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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