IP Test Method: Appendix I. Barometric pressure corrections for mercury barometers

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  • Method adopted/last revised:
  • Method reapproved:
  • REF/ISBN: App-I-2934869
  • Status: Current
  • First printed in STM books: January 1996

The preferred unit of barometric pressure, agreed at the eigth Congress of the World Meteorological Organization, is the heptopascal (hPa), also barometers of the Fortin type are usually calibrated in either these units or millibars. For these reasons the tables of corrections I1 and I2 are given in these units.

Tables are also given for correcting observed barometric pressure for barometers calibrated in millimetres of mercury (mmHg) these tables are 1a and 2a.

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