Filiberto, Patrick, Richard

WP 5784

The major issue encountered was that the X4 PT525 and X5 PT526 BPG402 EtherCAT gauges reported 0 torr after being connected to the end X vacuum chassis. I have not yet been able to figure out why. These gauges have been moved back to h1ecatx1 for now. All of the status information that I could find for them seemed to indicate that they were fine, and that the hot cathode ion gauge was in use (active sensor: 2). Richard measured the voltage directly from the pins on one of the gauges and it reported around 1.72 V, which would have been in the right range. I tried a factory reset by writing to CoE index FBF0 0x01, but it is unclear if a reset occurred. If one did, it did not help. I tried changing the units readback to counts and got a large changing number, but strangely the linked variable still read 0. I will connect a spare BPG402 gauge to the end Y chassis in the EE lab and do some more testing.

In regards to the other changes, I trended the pressure and high voltage for IP 12 and it is back to around what it was before the change to Beckhoff. It is hard to tell at this point if the smoothing for the CP8 pump level is noticeable or improving the PID control.