Re: correct air pressure

[Chris Alston <alstonc@odrge.odr.georgetown.edu>]

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>Date:         Thu, 26 Mar 1998 08:33:38 -0600
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>From: "Virgil M. Willcut" <Virgil.Willcut@SIH.NET>
>Organization: Southern Illinois Healthcare
>Subject:      Re: correct air pressure
>To: Multiple recipients of list MEDPHYS <MEDPHYS@LISTS.WAYNE.EDU>
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>     The National Weather Service (NWS) deals in sea level pressure.  They
>     are the ones that calibrate all the barometers used by airports and
>     weather stations, so their barometers always read sea level pressure.
>     Call the local branch of the NWS and find out what they have for your
>     pressure (their tied in to all the airports and can give you the
>     pressure of the nearest one).  Then correct that reading for your
>     altitude (not the altitude of the airport).  The info about your
>     altitude can usually be obtained from a county extension service or
>     some such local entity (you might have to make a few calls to find out
>     what your altitude is, but your physical plant staff may know).
>     Compare this number with your Hg barometer's reading after the
>     appropriate corrections for temperature and latitude have been made.
>     All aneroid barometers should be forced to agree with the Hg corrected
>     and verified readings.  This is just my opinion.
>
>     Virgil Willcut, MS
>     virgil,willcut@sih.net
>