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The corner load errors can be electrically compensated. This is done by matching the individual
measured values to the smallest measured value by connecting additional resistors. For details
of how to do this see section Example for corner load adjustment (Page 39)
The resistors are connected in series with the load cell measuring signal. The appropriate resistor
will reduce the measuring voltage until it is equal to the smallest voltage. The temperature
coefficient must be suitably small, due to connection of the resistors in the measuring circuit:
0.25 ppm/K to 10 ppm/K.
6.3.3.3
Example for corner load adjustment
Example data for corner load adjustment
The corner load adjustment described below as an example is based on the following data:
Scale
LC 1 ... LC4
Test weight
Figure 6-2
SIWAREX WL200
Operating Instructions, 04/2021, A5E02199611B-12
Version
Platform scale with 4 load cells
Rated load
500 kg
E
max
Rated char‐
2.0 mV/V
acteristic
value C
Rated
Load cells
150 kg
Test process / scale
6.3 Adjustment and initial commissioning
Commissioning
39
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