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Page 20 AD-4402
5.
5.5.
5. Calibration
CalibrationCalibration
Calibration
The indicator, which is connected loadcell unit, can weigh the "weight" value on the
loadcell pan and display its "mass" value. The calibration function is used to adjust
the weighing value (displaying value) so that the weighing system can weigh
correctly.
There are two way of the calibration. The "actual load calibration" uses a rated
mass and zero output from the loadcell. The "digital span" inputs arbitrary values
(calculated by hand). These methods are selected in the calibration procedure.
There is a compensation function of the "gravity acceleration correction".
This function is used, when a calibrated weighing system is moved to other place.
These calibration parameters are stored in the indicator without any power supply.
Common Calibration Items
Unit The "g", "kg" and "t" or "lb" can be selected.
Decimal point The decimal point can be selected form "not used" to "four
decimal places".
Minimum division The minimum division of the weighing display.
Weighing capacity The maximum display of the weighing display.
Items for the "Actual Load Calibration"
Common items Unit, decimal point, minimum division and weighing capacity
Zero point adjustment A zero point output is used from the loadcell unit.
Span adjustment Rated mass is place on the weighing pan and is weighed.
The sensitivity is adjusted. This sensitivity is the same as "
sensitivity " of digital span.
Items for "Digital Span"
Common items Unit, decimal point, minimum division and weighing capacity
Zero point output The numerical data is input as zero point output of loadcell
unit.
Rated capacity The rated capacity of the loadcell is input.
The sensitivity of the loadcell is input.
Caution
When the CAL switch on the A/D board is "DISABLE", any calibration can not
perform.
Do not perform any calibration during a weighing sequnce operation.
Entering calibration mode during a weighing sequnce operation, the weighing
sequnce operation is terminated. Calibrate the weighing system, when a
weighing sequnce operation does not work
The accuracy of the "Digital Span (Calibration without Mass)" is 1/1000.
Do not use a "loadcell summing box", the "digital span" is performed.
It is necessary that the loadcell sensitivity is exactly known, if the "digital
span" is used.