Reports until 08:43, Tuesday 26 September 2023
H1 CDS
david.barker@LIGO.ORG - posted 08:43, Tuesday 26 September 2023 - last comment - 09:41, Tuesday 26 September 2023(73104)
h1sush7 and h1seih7 powered down for DC-PS swap

WP11438 HAM7 +24V IO Chassis Power Supply Swap

h1sush7 and h1seih7 are powered down, Fil is heading out to the mech room mezzanine to swap the power supply.

Comments related to this report
rahul.kumar@LIGO.ORG - 09:41, Tuesday 26 September 2023 (73106)SUS
Link

Fil and I went to the MER and replaced the DC power supply, the s/n are given below,

New s/n - S2001609

OLD s/n - S2001613

After replacing the power supply Dave restarted the models following which I restored the ISI and suspensions to their nominal state.

WP11438 is now closed.

david.barker@LIGO.ORG - 09:36, Tuesday 26 September 2023 (73108)
Link

Power supply replacement is complete. IO Chassis and front end computers are back online. All cards can be seen and the models are running correctly.

I untripped HAM7 SWWD and handed it over to the control room for recovery.

david.barker@LIGO.ORG - 09:39, Tuesday 26 September 2023 (73110)
Link

Broken Kepco power supply (removed) S2001613
New Kepco power supply (installed) S2001609