Product specifications

Page 20 AD-4402
5.
5.5.
5. Calibration
CalibrationCalibration
Calibration
The indicator, which is connected to a loadcell unit, can weigh the "weight" value on
the loadcell pan and display its "mass" value. The calibration function is used to
adjust the displayed value so that the weighing system can weigh correctly.
There are two ways of 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 another place.
The 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 (lb: USA only).
Decimal point The decimal point can be selected from "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 the zero point output of the
loadcell unit.
Rated capacity The rated capacity of the loadcell is input.
Sensitivity The sensitivity of the loadcell is input.
Caution
When the CAL switch on the A/D board is "DISABLE", no calibration can be
performed.
Do not perform any calibration during a weighing sequence operation.
Entering calibration mode during a weighing sequence operation, the weighing
sequence operation is terminated. Calibrate the weighing system only when
the weighing sequence operation has stopped
The accuracy of the "Digital Span (Calibration without Mass)" is 1/1000.
Do not use a "loadcell summing box", when the "digital span" is performed.
It is necessary that the loadcell sensitivity is exactly known, if the "digital
span" is used.