Minebea Intec Weighbridge PR 6021/68S, Руководство по установке

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5.5 Electronic corner correction
5.5.1 General information
Minebea Intec load cells are produced according to high quality standards and have
precisely adjusted output values.
Nonetheless, mechanical imbalances can cause impermissible corner load errors to arise,
which will need to be offset by soldering in resistors.
The correct installation and accurate alignment of load cells are imperative for good
measurement results and significantly affect the behavior with corner loads. Therefore,
the installation and alignment of the load cell should always be checked first if a corner
error is identified.
If necessary, carry out mechanical height adjustment (see Installation manual of the load
cell).
NOTICE
Loss of calibration accuracy
An unstable signal can arise due to contact problems. This results in fluctuating zero
points, which lead to the loss of calibration accuracy.
Do not use a potentiometer.
Only use resistors of 0–5.62
Ω
(1%, P70 = 0.6 W) of size MBB0207
(approx. 2.5 × 6.5 mm) or CECC B.
5.5.2 Procedure
Electronic corner correction allows the sensitivity of each individual load cell to be
reduced separately.
The resistor required here can be calculated using the following formula:
R Resistor integrated in the input circuit of the load
cell (the resistance value is normally <7
Ω
).
Weight
actual
Weight value on the display
Weight
set point
Weight of the placed load
R
LC
Input resistance of the load cell
Example:
placed load 12,000 kg
Display 12,052 kg
R
LC
1080
Ω
(see Installation manual of the load cell)
Calculated resistance
4.68 Ω
Weighbridge Cable Junction Box PR 6021/68S 5 Cable connections
EN-18 Minebea Intec