peter.king@LIGO.ORG - posted 12:15, Sunday 09 October 2016 - last comment - 14:51, Sunday 09 October 2016(30353)
"electronic" flow sensors installed
Installed the "electronic", ie dummy, flow sensors into both the power meter and front end circuits.
So the two readouts of those flow rates will be bogus for a while. Currently the front end circuit
reads 4.5 lpm and the power meter circuit reads 0.5 lpm. Even though the current sources were set
to mimic the real flow rate.
The Martel calibrator always complains that it is "OPEN LOOP". The other source didn't have
any error messages.
The minimum flow rate trip point was increased from 0.2 lpm to 0.4 lpm.
The Beckhoff terminal for the flow rates reports the following: - an under-range and error flag for the power meter circuit - an over-range and error flag for the front end circuit The laser was still running under these conditions. I decided to try force writing these variables in TwinCAT to match the previous values. The "electronic" flow sensors are still attached however.