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Article #1263

Re: Status #7 Cell 4A3

#1263
From: Stephen Behling
Date: Fri, 08 Jan 1993 21:06
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In article <930106131352.20c082a7@FNALD.FNAL.GOV>, DROEGE@fnald.fnal.gov writes:
> Status #7 Cell 4A3
[...]
> We are presently operating at 800 ma which results in a cell voltage of 4.5 
> volts.  Present calorimeter balance is at 7.300 watts.  Peak to peak changes 
> over the last several hundred hours are consistent with the 0.035 mw one sigma 
> calibration.  But there is an offset from the December calibration with only 
> probable cause due to high temperature TED creep.  Remember to get the 
> temperature range we are operating with the shell servo off and floating.  A 
> curious observation is that we are more sensitive to the outside air 
> temperature than to the room temperature.  So while the room temperature is 
> relatively constant, the calorimeter "sees" the outside through the dewar, 1 
> 1/2" of foam, a (now) floating aluminum radiation shield, 1 1/2" foam, 10' of 
> air, and an R19 house wall or R30 roof.  
> 
   Especially in winter, inside air humidity is strongly correlated
with outside air temperature.  Perhaps??

    -steve behling
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Message-ID: <1993Jan8.150648.365@walter.cray.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!timbuk.cray.com!walter.cray.com!sxb
References: <930106131352.20c082a7@FNALD.FNAL.GOV>

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Path: arc1-ca.pugleaf.net!sparky!uunet!timbuk.cray.com!walter.cray.com!sxb
From: sxb@fermi.cray.com (Stephen Behling)
Subject: Re: Status #7 Cell 4A3
Message-ID: <1993Jan8.150648.365@walter.cray.com>
Originator: sxb@fermi
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Organization: Cray Research, Inc.
References: <930106131352.20c082a7@FNALD.FNAL.GOV>
Date: 8 Jan 93 15:06:48 CST