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Reports until 09:33, Wednesday 11 February 2015
H1 SEI
hugh.radkins@LIGO.ORG - posted 09:33, Wednesday 11 February 2015 - last comment - 10:30, Wednesday 11 February 2015(16643)
All HEPI Pump Servos restarted--to adjust database for medm display purposes

Just getting ranges correct and consistent for display of reds & greens.  All pressure lights are now Green and OK.  The SERVO database is set up so restart does not affect the HEPI platforms too much.  I of course would not do this if anyone was running any tests.  The times are: EY 1603, EX 1619, CS 1638utc.  Attached is 40 minutes of second trends with these times annotated.  The corner station pressure glitch was non existent, the ends had glitches of a few PSI.

When I look at the HEPI L4Cs during this pressure glitch, it looks like it is absorbed into the normal background glitching.  See the latter two attachments.

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hugh.radkins@LIGO.ORG - 10:30, Wednesday 11 February 2015 (16648)

The database still has the old PID parameters.  We will update these once we finish the plant analysis.  Anyway, we have been running different parmeters for the LVEA Pumps and I forgot to change these (with the medm) when I restarted it.  I've just now corrected this--again this should only make things better (reduce sensor noise coupling) and the transition should have been transparent.

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