jeffrey.bartlett@LIGO.ORG - posted 12:04, Tuesday 16 October 2018 (44586)
Replace TCS-X Chiller Flow Meter
Replaced the TCS-X paddle-wheel flow meter, due to glitches and trips attributed to the original sensor. Followed the procedures outlined in aLOG #32776. The old flow meter came out very hard. These flow meters are assembled without Vaseline or a similar lube/sealant on the two O-Rings on the sensor shaft. This makes moving the flow meter very difficult and has the potential to drag the O-Ring(s) out of their groves. Will look into a suitable lube/sealant for future installations.
Reprogrammed the flow meter with the following values, taken from original flow meter.
FLO Unit = G/m
FActor (K-Factor) = 385
Average = 5
SEnSit = 0
4 Set = 0 G/m
20 Set = 10 G/m
ContrAST = 3
The TCS-X chiller restarted, with no replacement water needed. The Laser restarted with no issues. The flow is being reported at 3.1 G/m. No leaks were observes around the flow meter plumbing or body.
I have rebuilt both old flow meters. They are ready for installation at anytime.