Problem 9479: Velo Error banks in HLt1 went up (from Presenter page /Shift/HLT: 1a- Error Banks in HLT1)

System
HLT
Severity
Report
Start date
2016-11-27 04:17
End date
2017-06-22 13:26
Runs affected
Reported by
Wojciech Krzemien on 2016-11-27 04:17

Comments

#1 by Wojciech Krzemien on 2016-11-27 04:17

Starting from the run 187015 the rate of the Velo Error banks in HLt1 went up to about 20Hz.
It might be correlated with the Veloc cooling pressure alarm that appeared more or less at the same time (issue #107977)

Logbook link

#2 by Vladimir Macko on 2017-06-03 08:21

Rate of Velo Error banks in HLT1 Increase to 100Hz followed by a sudden drop to ~30Hz, fluctuations observed also in the runs from past.

Logbook link

#3 by Alessio Piucci on 2017-06-17 02:57

VELO error bank rate up to 120 Hz.
See the logbook link for the picture from the presenter.
Email sent to the VELO piquet.

Logbook link

#4 by Niels Tuning on 2017-06-22 13:27

Error rate is still very low compared to L0 rate of ~900kHz.
Closed the problem with end date: 2017-06-22 13:26:00

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