To Replace Load Cell Assembly - KERN 440...N Service Manual

8 To Replace Load Cell Assembly

1. Disassemble top housing of scale.
2. Disconnect PL2 from main PCB. Remove the four screws fixing the bottom plate of the
load cell assembly. Replace the load cell with a new one.
Connect PL2 and fix the four screws.
3. Put 110% full capacity loading onto weight stand of scale and adjust the overload
screws.
4. Assemble the top housing.
5. Perform internal calibration as described in section 3.
6. Check accuracy of scale at different weight.
440-21N
weight tol.
(g) (g)
10.000 0.003
20.000 0.003 100.00
30.000 0.003 150.00
40.000 0.004 200.00
440-47N
weight tol.
(g) (g)
500.0 0.2
1000.0 0.2
1500.0 0.2
2000.0 0.2
440-35A
weight tol.
(g) (g)
100.00 0.03
200.00 0.03
400.00 0.04
600.00 0.04
7. Check other functions, such as Tare, Memory, Print, Mode and Auto-Off.
440...N-SH-e-0840
440-33N
weight tol. weight
(g) (g)
50.00 0.02 100.00
0.02 200.00
0.02 300.00
0.02 400.00
440-49N
weight tol. weight
(g) (g)
1000.0 0.3
2000.0 0.3
3000.0 0.3
4000.0 0.4
440-21A
weight tol. weight
(g) (g)
10.000 0.003 1000.0
20.000 0.003 2000.0
40.000 0.004 4000.0
60.000 0.004 6000.0
440-35N
tol. weight
(g) (g)
0.03 100.0
0.03 200.0
0.03 300.0
0.04 400.0
440-51N
tol. weight
(g) (g)
1000 2 1000
2000 2 2000
3000 2 4000
4000 2 6000
440-49A
tol.
(g) (g)
0.3
0.3
0.4
0.4
440-43N 440-45N
tol. weight
(g) (g) (g)
0.2 200.0
0.2 500.0
0.2 700.0
0.2 1000.0
440-53N 440-55N
tol. weight
(g) (g) (g)
2 1000.0
2 2000.0
2 4000.0
2 6000.0
tol.
(g)
0.2
0.2
0.2
0.2
tol.
(g)
0.6
0.6
0.6
0.6
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