cheryl.vorvick@LIGO.ORG - posted 11:27, Monday 12 March 2018 - last comment - 11:41, Monday 12 March 2018(40965)
TCSY glitching signals - an update to previous alog 40843
- In my alog 40843, the drawing I included shows the laser thermistor being read into box D1300649, which is incorrect. The laser temperature is an un-labled connection further down the drawing that shows the signal going into the control box, D1200745.
- That said, both boxes have signals that either glitch or drop in DC level at the time that the flow rate glitches.
- The instant recovery of the flow rate doesn't match an actual recovery due to a temporary reduction in flow due to debris in the chiller lines.
- With Fil's help, I can confirm that the D1300649 box, and the D1200745 box, and the flow meter have all been swapped out, and the glitches persist.
- Attached files show the glitching signals and the where they're read.
Images attached to this report
Comments related to this report
- lasertempvbridgeIN, which looks very flat for a real signal
- lasertempvbridgeOUT, which looks real, and drops in DC level at the same time the chiller flow glitches (see above plot)
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