Hardy Process Solutions HI 6110, User Manual

Page: 43 / 137

HI 6600 Series Modular Sensor System User Guide
Page | 43
Cal Tolerance Parameter
Sometimes, the contents of the vessel you are weighing are in motion. Cal Tolerance allows you to set a value that
determines the amount of motion that the system can tolerate and still calibrate. In other words, the value you enter for
Calibration Tolerance sets the amount of deviation to allow during the calibration process. This value must be greater
than or equal to the base motion value and/or the Graduation Sizes.
The base motion value can be calculated by using the following formula:
Base Motion value = (Total Load Cell Capacity x 0.0003)
RANGE: .000001 - 999999 (default 10)
Another way to determine what this value should be is to multiply the fluctuation from peak to peak and multiply this
amount by two.
Gravitation 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%.