12
VKK14 / VKK1
R
4
A23261.0 en/de/fr
H
BM
5
C
o
r
ne
r
load balancing
With
w
eighing machines, mechanical imbalance may lead to corner load
errors. According to the E
N
45501 3.6.2 standard for nonautomatic
w
eighing
machines, specific
v
alues are to be maintained for eccentric loading. The
terminal boxes pro
v
ide an easy
w
ay to compensate for these errors
electrically. A binarystepped net
w
ork of 4 resistors is a
v
ailable for each load
cell, that is
sho
r
ted
at the factory
v
ia 0
Ω
resistors (see Fig.5.1). Opening the
v
ertical 0
Ω
resistors acti
v
ates the rele
v
ant resistances and thus reduces the
load cell signal.
Sense (+)
Sense (−)
Excitation (+)
Excitation (−)
Signal (−)
Signal (+)
0.39
Ω
0.82
Ω
1.50
Ω
3.00
Ω
0.39
Ω
0.82
Ω
1.50
Ω
3.00
Ω
0.39
Ω
0.82
Ω
1.50
Ω
3.00
Ω
0.39
Ω
0.82
Ω
1.50
Ω
3.00
Ω
4
3
2
1
Output: Amplifie
r
Input: Load cells 1 ... 4
Fig.5.1:
R
esisto
r
netwo
r
k fo
r
co
r
ne
r
load balancing of 4 load cells
