Gravity Correction in Weighing Instruments

Objects weigh about 0.5% less at the equator than they weigh at each pole because the force of gravity is less at the equator than at the poles. For example, an object weighing 100 pounds at the North Pole on a spring scale would weigh 99.65 pounds at the equator. 

Depending on the latitude of your location, your scales would measure somewhere in between. The table below shows the gravitation correction factor for various cities around the world. 

In general, if your location is between the 45th parallel and the equator, gravity correction is greater than 1.0. For example, at these latitudes, because the gravity is less, you are adding, 1.0006 for an error that is .06%). For locations between the 45th parallel and the North or South Pole your correction factor will be less than 1.0. For example .9994 for an error that is -.06%.

NOTE: Ensure that the scale system is clean and ready to receive product. This step establishes the gross zero reference. You must perform a C2 Calibration after setting the Gravity Correction or the correction factor won’t work.

Gravity Correction Table