Jonathan, Patrick, Janos, Ryan, Dave:

The HAM1 pressure gauge PT100 is temporarily only available as a raw voltage signal (H0:VAC-LY_X0_PT100B_PRESS_VOLTS).

I wrote an EPICS IOC which reads this voltage signal, converts it to a pressure (Torr) and exports it as a "H1" version of the PT100B cold cathode signal. The new EPICS channel is:

H1:VAC-LY_X0_PT100B_PRESS_TORR

The new IOC is currently running in a tmux session on opslogin0. It was started at 11:31 Tue20may2025, at which time HAM1 was still at atmospheric pressure (10.0V, 750Torr)

WP12558 was opened to add this new channel to the DAQ so that this week's HAM1 pump down could be trended.

We restarted the DAQ 0-leg at 12:16, the EDC at 12:17 and the 1-leg at 12:22

I took the opportunity to complete WP12523 and add the new CDS rack power strip EPICS channels to the EDC.

EDC details:

Addition of H1EPICS_VACHAM1.ini (3 channels) and H1EPICS_PWRSTRIP.ini (36 channels) for a total additon of 39 channels, which give a new total of 59,311 chans in the EDC.

I added the new HAM1 pressure channel to the vacuum overview (see attached).

The pump down was already on its way when we added it to the DAQ, attached trend shows data is available from 12:22 onwards, at which time the pressure was at 200Torr