Minebea Intec MP 90/04, 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 ofset by soldering in resistors.
The correct installation and accurate alignment of load cells are imperative for good
measurement results and signiicantly afect the behavior with corner loads. Therefore,
the installation and alignment of the load cell should always be checked irst if a corner
error is identiied.
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 luctuating 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 output 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
O
Output resistance of the load cell
Example:
placed load 12,000 kg
Display 12,052 kg
R
O
1010
Ω
(see Installation manual of the load cell)
Calculated resistance
4.38
Ω
5 Cable connections Cable Junction Box MP 90/04
Minebea Intec EN-17