Gravitational zone

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A gravitational zone is a geographically defined region with a specified gravitational acceleration value according to the European gravitational zone concept according to WELMEC for legal-for-trade scales . The gravitation zone concept offers manufacturers of scales the possibility of adjusting scales at the place of manufacture for any location in Europe.

National regulations for gravitational zones

Germany, Belgium, Italy, Lithuania, Austria, Switzerland and Sweden have nationally defined gravitational zones with average gravitational acceleration values ​​depending on the scale accuracy.

Gravitational zones in Germany

The zones of gravity for Germany are defined in the "Guideline for the verification of non-automatic weighing instruments -EA 9-". There are 4 zones in total.

Zone region Gravitational acceleration g z
1 Bavaria-South (Lower and Upper Bavaria, Swabia) 9.8070 m / s 2
2 Baden-Württemberg, Bavaria-North (Franconia, Upper Palatinate) 9.8081 m / s 2
3 Hesse, North Rhine-Westphalia, Rhineland-Palatinate, Saarland, Saxony, Thuringia 9.8107 m / s 2
4th Berlin, Brandenburg, Bremen, Hamburg, Mecklenburg-Western Pomerania, Lower Saxony, Saxony-Anhalt, Schleswig-Holstein 9.8130 m / s 2

example

Calibration of a commercial scale dependent on the acceleration of gravity with a maximum load of 10 kg and a calibration value e = 1 g. The location of the calibration is Athens, the intended installation location Berlin (zone 4). The acceleration due to gravity at the test site in Athens is 9,800336 m / s 2 .

(rounded to the division value).

With a load of 10 kg in Athens, the scales must therefore show 9.987 kg with correct adjustment .

Individual evidence

  1. The European gravitational zone concept according to WELMEC for legal for trade scales
  2. Guideline for the verification of non-automatic weighing instruments -EA 9- of July 15, 1999
  3. ^ Gravity zones in Belgium for non-automatic weighing instruments
  4. Director of the State Metrology Service Order No. V-127 on 11 October 2012
  5. Gravity Zones in Austria
  6. Swiss gravity zones
  7. STAFS 1998: 7 The Swedish Board for Accreditation and Conformity Assessment's regulations for non-automatic weighing instruments