Gravity Zones

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One of the largest problems confronting a portable high resolution scale such as a Gemscale is the changing force of Gravity over the earth.  For example, here are some values for Gravity in northern Europe alone. 

In Japan, the country has been divided into official Gravity Zones, within which the force will be relatively constant.

The variation between these Northern European locations of 0.21% would affect the reading of a 50.000 carat mass by 0.105 carats.  Our Gemscales have used the method of Initial or Turn-On calibrations to align the readings with an absolute or known mass (the 10g or 100g Calibration Weight).

 

Location Gravity in m/s2
   
Luxembourg 9.809 60
Belgium 9.810 60
Ireland 9.814 00
Denmark 9.815 84
Sweden 9.816 66
Norway 9.818 00
Sweden 9.818 40
Sweden 9.820 08
Faeroe Islands 9.820 77
Greenland south of 680 9.821 11
Sweden 9.821 81
Sweden 9.822 79
Iceland 9.823 00
Sweden 9.824 32
Greenland 680-760 9.825 87
Norway 9.826 00
Greenland North of 760 9.830 36
 
 
Max Variation 0.21%

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