e
e
N
N
o
o
d
d
3
3
-
-
D
D
D
D
i
i
g
g
i
i
t
t
a
a
l
l
d
d
o
o
s
s
i
i
n
n
g
g
c
c
o
o
n
n
t
t
r
r
o
o
l
l
l
l
e
e
r
r
e
Nod3-
D
: User’s instructions
165 752-A
10/23
5
CALIBRATION :
5.1 Calibration types :
There are different possible calibration types (see examples in the documents : communication
SCMBus Réf. 165 756’ Appendix A and communication ModBus RTU Réf. 165 754 Appendix A) :
Physical calibration using known references on the load cell. This type of calibration can be done
with 1, 2 or 3 known loads.
Theoretical adjustment by setting the load cell sensitivity and a corresponding capacity.
Correction of the initial calibration value with a coefficient.
5.2 Non-linearity correction
For an installation with a non-linearity :
The linearization formula is as follows
The three A, B and C coefficients can be determined using
e
Nod
View
software.
Corrected measurement = Meas – A (Meas)
2
– B(Meas) – C
where Meas = current measurement
Fig. 1
