AND Check Weighing Indicator AD-4404, Инструкция по эксплуатации

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5.
5. 5.
5. Calibration
Calibration Calibration
Calibration
The indicator, which is connected to a loadcell unit, can weigh the "weight" value on
the weighing conveyor 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 unit. 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 indicator maintains the calibration parameters without any power supplied.
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 mass that can be displayed.
Items for the "Actual Load Calibration"
Common items Unit, decimal point, minimum division and weighing capacity
Zero point adjustment A zero point output, from the loadcell unit, is used.
(Zero calibration)
Span adjustment A rated mass is placed on the weighing conveyor and is
weighed. The sensitivity is adjusted. This sensitivity is the
same as "sensitivity" of digital span. (Span calibration)
Items for "D
igital
S
pan
"
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 unit is input.
Sensitivity The sensitivity of the loadcell unit 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 or less.
Do not use a "loadcell summing box", when the "digital span" is performed.
It is necessary that the loadcell sensitivity is known exactly, if the "digital
span" is to be used.