ASTM D3631 - 99(2017) - Standard Test Methods for Measuring Surface Atmospheric Pressure

ASTM D3631 - 99(2017)

Standard Test Methods for Measuring Surface Atmospheric Pressure

Status : Current   Published : March 2017

Format
PDF

Format
HARDCOPY



1.1 These test 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 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.

1.3 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:

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

1.3.2 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.



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

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

1.6  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.




Standard NumberASTM D3631 - 99(2017)
TitleStandard Test Methods for Measuring Surface Atmospheric Pressure
StatusCurrent
Publication Date01 March 2017
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Aneroid barometer, Atmospheric pressure, Barometer, Barometry, Fortin-type mercurial barometer, Mercurial barometer, Pressure
ICS07.060
PublisherASTM
FormatA4
DeliveryYes
Pages5
File Size92 KB
Price£40.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version


Worldwide Standards
We can source any standard from anywhere in the world


Develop a PAS

Develop a fast-track standardization document in 9-12 months