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Scale parameters and functions
8.5 Calibration procedure
Load cell characteristic value
1 mV/V
2 mV/V
4 mV/V
This defines the characteristic curve and the scale can now calculate weights for the full
measuring range.
The diagram below illustrates the relationship between calibration digits and the calibration
weight.
Figure 8-3
Load
L=0
Lo
L1
L
max
L
max
You do not need to perform calibration if the calibration digits and the calibration weights are
known to the weighing module described here. They are simply sent to SIWAREX by data
record DR 3 and the scale is ready for use immediately.
The SIWATOOL program facilitates rapid calibration.
Following commissioning and calibration, all data records must be read from the weighing
module and saved as a scale file.
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
68
Calibration digits and calibration weight
Comment
Load cells empty
Calibration weight 0 "Zero
point"
Calibration weight 1
Rated load of the load cell(s)
+10 %
Rated weight + approximately
10%
Calibration digit 1 (ca.) when rated load is
500 000
1 000 000
2 000 000
Load
0 kg
e.g. 60 kg
e.g. 100 kg
e.g. approximately
110 kg
Operating Instructions, 08/2019, A5E33715669A-AD
Digits
Approx. 0
e.g. 70 682 for calibration
point 0
e.g. 308 452 for calibration
digits 1
1 000 000
1 090 000
SIWAREX WP321
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