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ASTM D3631

Standard Test Methods for Measuring Surface Atmospheric Pressure

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Organization: ASTM
Publication Date: 10 September 1999
Status: active
Page Count: 5
ICS Code (Geology. Meteorology. Hydrology): 07.060
scope:

These test methods cover the measurement of atmospheric pressure with two types of barometers: the Fortin-type mercurial barometer and the aneroid barometer.

In the absence of abnormal perturbations, atmospheric pressure measured by these test methods at a point is valid everywhere within a horizontal distance of 100 m and a vertical distance of 0.5 m of the point.

Atmospheric pressure decreases with increasing height and varies with horizontal distance by 1 Pa/100 m or less except in the event of catastrophic phenomena (for example, tornadoes). Therefore, extension of a known barometric pressure to another site beyond the spatial limits stated in 1.2 can be accomplished by correction for height difference if the following criteria are met:

The new site is within 2000 m laterally and 500 m vertically.

The change of pressure during the previous 10 min has been less than 20 Pa. The pressure, P2 at Site 2 is a function of the known pressure P1 at Site 1, the algebraic difference in height above sea level, h1 − h2, and the average absolute temperature in the space between. The functional relationship between P1 and P2 is shown in 10.2. The difference between P1 and P2 for each 1 m of difference between h1 and h2 is given in Table 1 and 10.4 for selected values of P1 and average temperature.

Atmospheric pressure varies with time. These test methods provide instantaneous values only.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific safety precautionary statements are given in Section 7.

Document History

ASTM D3631
September 10, 1999
Standard Test Methods for Measuring Surface Atmospheric Pressure
These test methods cover the measurement of atmospheric pressure with two types of barometers: the Fortin-type mercurial barometer and the aneroid barometer. In the absence of abnormal...
September 10, 1999
Standard Test Methods for Measuring Surface Atmospheric Pressure
These methods cover the measurement of atmospheric pressure with two types of barometers: the Fortin-type mercurial barometer and the aneroid barometer. In the absence of abnormal perturbations,...
September 10, 1999
Standard Test Methods for Measuring Surface Atmospheric Pressure
These methods cover the measurement of atmospheric pressure with two types of barometers: the Fortin-type mercurial barometer and the aneroid barometer. In the absence of abnormal perturbations,...
September 10, 1999
Standard Test Methods for Measuring Surface Atmospheric Pressure
1. Scope 1.1 These methods cover the measurement of atmospheric pressure with two types of barometers: the Fortin-type mercurial barometer and the aneroid barometer. 1.2 In the absence of abnormal...
September 10, 1999
Standard Test Methods for Measuring Surface Atmospheric Pressure
These methods cover the measurement of atmospheric pressure with two types of barometers: the Fortin-type mercurial barometer and the aneroid barometer. In the absence of abnormal perturbations,...
January 1, 1995
Standard Test Methods for Measuring Surface Atmospheric Pressure
A description is not available for this item.
February 24, 1984
STANDARD TEST METHODS FOR MEASURING SURFACE ATMOSPHERIC PRESSURE (R 1990)
A description is not available for this item.

References

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