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Author
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Topic: Barometers: Fischer Precision Aneroid set screw
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David Burch
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posted June 09, 2009 09:49 PM
The bottom of the instrument has a large plug. Use a large screwdriver to remove this plug and you will see inside the small screw that sets the instrument as needed.
You will find it has a very smooth, uniform motion, so you can easily set the instrument to within a fraction of a mb.
NOTICE! These precision instruments are intended to read accurate station pressure at the site of the barometer. This pressure will always be lower than the sea level pressure that is reported in media and official sources. The offset is a fixed value depending on the elevation. It can be determined for your location at www.starpath.com/barometers.
* * * The adjustment screw on the device is for correcting minor station-pressure drifts of a mb or so over periods of many months. It should not be used to attempt to set the device to match sea level pressure.
From: Starpath, Seattle, WA
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