Temperature and humidity swings also play havoc with analytical balances. The effect is hard to see (usually there is no alarm) but the weights may be subtly off.

 

Some scales can be set to autocalibrate when the temperature varies by more than a set limit (usually 1 K). I have not seen any scales with humidity driven autocalibration.

 

Slawomir Janicki

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From: "Lee Latimer" <lhlatimer**At_Symbol_Here**MINDSPRING.COM>
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Sent: Thursday, March 28, 2013 8:07:18 PM
Subject: Re: [DCHAS-L] Temperature Setbacks in Labs

Setbacks for synthesis labs are a bad idea as the reactions often are run at "room temperature" and dependent on a consistent temperature sue to changes in kinetics if it varies.  Analytical labs often have queues of experiments set up for overnight, and cell experiments/fermentations can have the same issues on open shakers, etc.

Tough to do with labs.  One energy control can be closing hoods or having them set with variable speed settings based on open or closed.

Lee Latimer


On 3/28/13 12:19 PM, "Brennan, Catherine (Environment Health & Safety)" <CRBRENNAN**At_Symbol_Here**EHS.UNC.EDU> wrote:

Does anybody do temperature setbacks in research labs when unoccupied - specifically with the use of occupancy sensors?  I know our research labs are occupied at all times and days of the week but curious if anybody has done this with occupancy sensors and how it has worked out.  Thanks!
-Cathy
 
Catherine R. Brennan
Chemical Hygiene Officer
Environment, Health and Safety
University of North Carolina at Chapel Hill
1120 Estes Drive Extension, CB#1650
Chapel Hill, NC  27599-1650
(919) 843-5331
(919) 962-0227 FAX