peter.king@LIGO.ORG - posted 10:30, Sunday 09 October 2016 - last comment - 10:36, Sunday 09 October 2016(30350)
laser restart
Restarted the laser a few minutes ago. No configuration changes per se. This time the crystal chiller was
explicitly power cycled, ie turned off and then back on again.
Next attempt will include installation of the "electronic" flow sensor unless something more obvious
comes to the fore.
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Attached is what I could glean from the Beckhoff terminal that monitors the flow rates. The error bit
was not set in either case. Unfortunately I do not recall if this terminal latches when an error condition
is detected.
The Beckhoff terminal concerned is a EL3054 4 channel analogue input, 4 - 20 mA.
Checked, the EL3054 does latch if an error condition presents itself.
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