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Message ID: 646     Entry time: Tue Jul 8 10:20:10 2008
Author: steve 
Type: Update 
Category: PEM 
Subject: HEPA turned on 
It is specially important to run the PSL-HEPA filters when inside counts is peaking at 30,000 counts

There is a small label at the hepa on/off switch:
enclosure open 100%,
low noise off,
normal 60% of Variac voltage setting on the top of the enclosure

Not running the HEPAs will lower the temp fluctuations from 1.5 to o.5 degree C
at the cost of particle counts from 0 to immidiate room counts.
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hepa.jpg
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