Scale parameters and functions
8.4 Calibration procedure
SIWAREX WP321
56 Manual, 07/2014, A5E33715669A-02
Identical scales can be put into operation immediately. Connect the PC to the new scale and
enable the "Send all data records" function in service mode. This transfers the parameters
for calibration weights and calibration digits, and the characteristic curve is determined
immediately. The same applies when you change a weighing module.
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 Linearizing the scale's characteristic curve
L=0 Load cells empty Approx. 0
Lo Calibration weight 0 "Zero
point"
0 kg e.g. 76 082 for calibra-
tion point 0
L1 Calibration weight 1 e.g. 60 kg e.g. 386 452 for calibra-
tion digits 1
L2 Calibration weight 2 e.g. 80 kg e.g. 451 367 for calibra-
tion digits 2
L
max
Rated load of the load cell(s) e.g. 100 kg 1 000 000
L
max
+10 % Rated weight + approximately
10%
e.g. approximately 110
kg
1 090 000