4. Calculate the compensating resistance:
Use the following formula:
R
c
om
p
Determined compensation resistance, to be connected in the signal cable SIG+
R
o
Output resistance of the load cells; can also be measured under load
L
er
r
Weight error: Differential value from the lowest weight value
L
te
st
Test load; placed on all four corners
N
LC
Number of load cells in the scale
Figure 6-3
Formula for corner load adjustment
Example calculation:
Load cells
Example values
Calculation
Results for R
comp
LC 1:
R
comp
= R1 = 1004.52 Ω x 12 kg /
150 kg
approx. 80 Ω
LC 2:
-
1)
-
1)
LC 3:
R
comp
= R3 = 1010.70 Ω x 7 kg / 150 kg approx. 47 Ω
LC 4:
R
comp
= R4 = 1028.12 Ω x 4 kg / 150 kg approx. 27 Ω
1)
Smallest value: No resistance necessary
5. Install the calculated resistances:
(;&'&9
(;&'&9
/&
(;&
/&
(;&
/&
(;&
/&
(;&
(;&
(;&
(;&
(;&
6,*
6,*
6,*
6,*
6,*
6,*
6,*
6,*
6,*
6,*
5
˖
5
˖
5
˖
Figure 6-4
Circuit diagram for corner load adjustment
6. Repeat the test.
Commissioning
6.3 Adjustment and initial commissioning
SIWAREX WL200
Operating Instructions, 12/2021, A5E02199611B-13
41
