[dsg-halla_moller] [New Logentry] TM3 to full nominal current of 3370 A

[beng at jlab.org]

Logentry Text:
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Pablo and I verifed that all channels of the voltage comparators were wired and worked as expected. Namely that when a + voltage was on the upper channel it tripped the upper and a - votlage on the upper it tripped the lower. Similarly a + voltage on the lower would trip the lower and a - voltage on the lower would trip the upper.

All seven channels (one for each coil) on the VCs were verified good. We found 2 cables that needed to be swapped between +/- connections.

We then adjusted the balance on channels 1, 6, and 7 since those still tripped at 1200 A. After doing so we were able to reach nominal current, albeit briefly. When running at 3370A the voltage is just under the MPS software limit of 35 V so eventually the MPS tripped itself due to an overvoltage fault.

We tried several places to change this limit but couldn't get anything to work, we've already reached out to OCEM for support.

The balance for the remaining 4 channels will be done once this issue is worked around. We also need to set the gain for all channels to lower values as well.

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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/4458343
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