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Mon Nov 24 19:15:16 2008, rana, alberto, john, Configuration, Environment, temperature
Tue Nov 25 19:29:15 2008, rana, alberto, john, Configuration, Environment, temperature
Thu Nov 27 22:56:42 2008, rana, Configuration, Environment, temperature
Tue Nov 25 19:29:15 2008
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rana, alberto, john
The PSL Room Temperature was alarming because it had gone above 23 C. This set off an unfortunate chain of events:
We found that the PSL HEPA was set low (20%). This is a fine setting for when no one is working in there but it
does raise the temperature since there are heat sources inside the blue box.
We tried to change the office area temperature to compensate and also the westmost sensor inside the lab area by 2 deg F.
The office area one was problematic - there was so much dust in it that the gas valve nipple was clogged. So we've
now blown it all clean with a compressed air can. We're now tuning the calibration screw to make our new
digital sensor agree with the setpoint on the controller.
Expect wild temperature swings of the office area for a couple days while Alberto and I tune the servo.
This morning Bob found 92F in the office area and in the control room of the lab. He turned down the thermostat and when I got in at about 9 I found 65. After a few hours of adjustment of the thermostat's calibration, I could stabilize the room temperature to about 72F. I also turned down the thermostats inside the lab of a couple of degrees F.