Kabelanschlusskasten Typ KPK-4/L6 Technisches Handbuch, Rev. 1.03 April 2017
Junction Box Type KPK-4/L6 Technical Manual
Seite / Page 12/12
Corner Correction at Scales with Flintec Load Cells
Flintec load cells are manufactured with rather tight tolerances, so in most cases an additional corner
correction is not required. The best conditions are achieved if you use load cells of the same class
(Designation is done with capital letters A to I on the load cell package besides the type label).
Hint: Corner errors can have a mechanical background, e.g. sloped mounting surface of the load cell.
Procedure:
1. The 0 Ohm jumpers instead of the correction resistors must be in place (shipment status).
2. Get the display value for each corner. Use the highest possible display resolution (e.g. factor 10 or higher)
or, if this is not possible, measure the digital weight increment using corresponding weights.
3. The corner with the lowest display value is the starting point for the corner correction. The differences of
the other corners are calculated with reference to this “basic corner”.
4. Calculate the correction resistance as follows:
Correction resistance [
Ω] =
Deviation in [kg]
X Output resistance of the load cell [
Ω] *
Test load in [kg]
* 1000
Ω input resistance for:
BK2, SB4, SB5, SB6, SB14, SLB, ZLB, UB1, UB5, UB6, PB, RC3
350
Ω input resistance for:
RC1, SB2
Example 1:
1100
Ω load cell
0.1 kg corner error with 500 kg test load
0.1 kg
x
1000
Ω
=
0.2
Ω
500 kg
Example 2:
400
Ω load cell
10 kg corner error with 5000 kg test load
10 kg
x
350
Ω
=
0.7
Ω
5000 kg
5. Install the correction resistor into the junction box instead of the 0 Ohm jumper for the corresponding load
cell excitation OR adjust the potentiometer (see below).
6. Check the corners again. If required repeat the procedure.
NOTE: 50 ppm resistors for corner correction are available as a set of 14 values from 0.22
Ω to 4.7 Ω (10 pcs.
for each value; article no. 5200-030).
In the junction box you can also find moisture absorber. Open the bag and leave it in the junction box. This will
absorb moisture up to a certain degree. Check the cover sealing and install the cover of the box.
