Hardy 1734-WS Installation & Operation Manual
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Ref Weight
The Ref Weight is a Calibration low or C2 Cal reference point derived from an actual measured weight, normally
zero.
Gravity Correction
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 a few cities around the world.
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.
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%.
Gravity Correction compensates for an object weighing less at the equator than at the North or South Pole. This
allows the user to enter the correction factory for their location and apply it for their C2 calibration. This is not
used for the hard calibration.
