Minebea CSD-401, Instruction Manual, Page: 28 / 150

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4. Calibration
To be able to display the output count from the measuring section (digital load cell) as an accurate
weight, the operation to match the display of the instrument with the weight loaded on the measuring
section is called a calibration.
For example to adjust the display of this instrument to 100.00 accurately when the weight of 100 kg is
loaded on the measuring section is said.
4-1. Set items required before the calibration
Register the S/N (serial No.) of digital load cell for effect the digital load cell connected with the instrument.
If there are several digital load cells, register all S/N of digital load cell.

This instrument is not able to recognize the digital load cell without register S/N.
Execute corner adjustment for correcting output balance of each digital load cell in the case of need high
precision measurement with using several digital load cells.

Balance adjustment is unnecessary in case of difficulty because tank, hopper, etc., is too big or too heavy to
move.
4-2. Set items required in the calibration
(1) Scale interval ( , , , , , )
It is the minimum unit of the measuring value The value to be set is [1], [2], [5], [10], [20] or [50].
The value of [Weighting value/Scale interval] is the display resolution.
(2) Weighting value ( )
It is the maximum weight to be able to measure by the measuring section (digital load cell).
(3) Mass of weight used at the span calibration ( )
The span calibration can be executed with the arbitrary weight. The same setting as the weighting
value is executed when there is a weight for weighting.
Please give setting here as 2/3 or more of weighting to reduce the calibration error.
(4) Calibration at zero ( )
It is a procedure of the calibration to become the zero point of the measurement when nothing is
put on the measuring section (status of an initial load). There are [Method by the weighing data
(status of an initial load)] and [Method by a numeric input of the digital load cell output count] as a
calibration method.
(5) Calibration at span ( )
It is a procedure by which execute the calibration of the change in the digital load cell output count
when the weight is put on the measuring section to become the display of a correct weighing value.
There are [Method with weight] and [Method by a numeric input of the digital load cell output count]
as a calibration method.