john.worden@LIGO.ORG - posted 05:18, Friday 23 October 2015 - last comment - 06:09, Friday 23 October 2015(22772)
LVEA temperature
In response to Corey's alog I have turned on an additional heater in the LVEA.
HC2B has been set to 9ma or one stage of heat. The discharge air is responding so I know the heater is working.
The power outage earlier this week has messed up our FMCS trending capability and Bubba and I have been trying to sort this out. There are a few bad data samples which mess up the plotting routine and apparently no way to delete these data points according to our vendor!. For the interim we can use data viewer while at LIGO but from home it is difficult to see trends.
I noticed that the end stations were running out of control range so I have incremented the heat there as well. Both end stations' heaters are now set to 9ma on the control signal. These are variac fed units so there should be no significant current spikes as in the corner where the heaters are either off or on.