Siemens SIWAREX WP321 Operating Instructions Manual page 69

calibration weights and calibration digits, and the characteristic curve is determined
immediately. The same applies when you change a weighing module.
Note
Two working points are usually sufficient for determining the scale's characteristic curve. An
additional working point is only required for non-linear systems.
Specification of negative calibration points is not possible. However, the characteristic can also
be used in the negative range down to -2 000 000 digits. To achieve this, the characteristic
curve generated in the positive range is extended into the negative range.
Figure 8-4
Load
L=0
Lo
L1
L2
L
max
L
max
SIWAREX WP321
Operating Instructions, 08/2019, A5E33715669A-AD
Linearizing the scale's characteristic curve
Comment
Load cells empty
Calibration weight 0 "Zero
point"
Calibration weight 1
Calibration weight 2
Rated load of the load cell(s)
+10 % Rated weight + approximately
10%
Scale parameters and functions
8.5 Calibration procedure
Load
0 kg
e.g. 60 kg
e.g. 80 kg
e.g. 100 kg
e.g. approximately 110
kg
Digits
Approx. 0
e.g. 76 082 for calibra‐
tion point 0
e.g. 386 452 for calibra‐
tion digits 1
e.g. 451 367 for calibra‐
tion digits 2
1 000 000
1 090 000
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