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Reports until 17:36, Wednesday 01 July 2026
H1 CDS
david.barker@LIGO.ORG - posted 17:36, Wednesday 01 July 2026 - last comment - 08:34, Thursday 02 July 2026(90866)
Restored EY CP7 PID controls following computer reboot

Following the reboot of h0vacey at 15:37 this afternoon the CP7 PID fill parameters needed to be reset. Using the values in h1vacuumsdf's safe.snap file, I ran the following caput commands as user vacuum on zotvac0

caput H0:VAC-EY_CP7_400_LLCV_CTRL PID
caput H0:VAC-EY_CP7_400_LLCV_MAN_POS_PCT 8.80000000000000000000e+01
caput H0:VAC-EY_CP7_400_LLCV_PID_CYCLE_TIME 1.00000000000000000000e+04
caput H0:VAC-EY_CP7_400_LLCV_PID_ITERM_MAX_LIM 2.00000000000000000000e+01
caput H0:VAC-EY_CP7_400_LLCV_PID_ITERM_MIN_LIM -2.00000000000000000000e+01
caput H0:VAC-EY_CP7_400_LLCV_PID_KI 1.00000000000000008180e-05
caput H0:VAC-EY_CP7_400_LLCV_PID_KP 6.00000000000000000000e+00
caput H0:VAC-EY_CP7_400_LLCV_PID_OFFSET 8.00000000000000000000e+01
caput H0:VAC-EY_CP7_400_LLCV_PID_OUT_DEAD_BAND 0.00000000000000000000e+00
caput H0:VAC-EY_CP7_400_LLCV_PID_OUT_MAX_LIM 1.00000000000000000000e+02
caput H0:VAC-EY_CP7_400_LLCV_PID_OUT_MIN_LIM 2.50000000000000000000e+01
caput H0:VAC-EY_CP7_400_LLCV_PID_SETPT_PCT 9.20000000000000000000e+01
caput H0:VAC-EY_CP7_XV400_LLCV_ENABLE_CTRL Enable
caput H0:VAC-EY_CP7_LT400_PUMP_LEVEL_MA_SMOO 9.98999999999999999112e-01
 

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david.barker@LIGO.ORG - 07:08, Thursday 02 July 2026 (90869)

1 day trend of CP7 LN2 level drop and recovery

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david.barker@LIGO.ORG - 08:34, Thursday 02 July 2026 (90871)

I've added a RESTORE SETTINGS button to the Vacuum Overview which gives instructions on how to restore CP PID settings per vacuum control system.

This can only be done by the vacuum account on zotvac0. All other workstations have read-only access to VAC EPICS channels.

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