WP11438 Replace HAM7 IO Chassis +24V DC power supply

Fil, Rahul, Ryan, Dave:

This morning Fil replace the Kepco dual-channel DC power supply which is powering h1sush7 and h1seih7 IO Chassis. At a rate of roughly once per year the channel which powers h1sush7's chassis has tripped.

The procedure was:

Put HAM7 SUS and SEI into a safe state.

On h1[sus,sei]h7: stop the models, fence from Dolphin fabric, power computers down.

On the mezzanine, power down the IO Chassis, replace the power supply, power everything back up.

In the MSR, power h1[sus,sei]h7 back up. Verify all the IO Chassis cards can be seen (they can)

After the models had restarted, untrip the HAM7 SWWD. Clear IPC and CRC errors. Recover HAM7 to an operational state.

WP11443 Reroute LVEA Comtrol wiring

Fil, Patrick, Dave:

Fil powered down the Comtrol (ethernet to serial converter) which is used to read the LVEA Dust Monitors and the 2IFO dew-point sensors.

The system was down between 09:40 and 09:54.

I restarted the LVEA dust monitor IOC, it had lost connection with its dust monitors.

The 3IFO-DEWPOINT IOC did not need a restart.

No DAQ Restart Today