Sewha SI 410 - ERROR AND TREATMENT GUIDE; 7-1. Load Cell Installation

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7. Error & Treatment
7-1. Load Cell Installation
Error
Cause
Treatment
Remarks
Weight Value is
unstable
1) Load cell broken
2) Load cell isolation
resistance error
3) Weighing part
touches other devices
or some weight is on
the weighing part
4) Summing Board
Error
1) Measure input/output
resistance of Load cell.
2) Measure Load cell
isolation resistance
1. Input Resistance of
“EXC+” and “EXC-“ is
about 400Ω ±30
2. Output Resistance of
“SIG+“ and “SIG-” is
about 350Ω ±3.5
3. Isolate Resistance is
more than 100MΩ
Weight Value is
increased regular
rate, but not
return to “Zero”
1) Load cell Error
2) Load cell connection
Error
1) Check Load cell
connection
2) Measure Load cell
Resistance
Weight Value is
increased to
under Zero
Load cell Output wire
(SIG+, SIG-) is switched
Make wire correction
“UN PASS”
display
Load cell broken or
Indicator connection
Error
Load cell Check
Load cell connection Check
Power was “ON” when
some weight is on the
load cell.
Remove weight on the Load
cell
“OL” or “UL”
display(Over
Load)
1) Load cell broken or
Indicator connection
Error
2) Loading over than
Max Capacity
1) Load cell Check
2) Load cell connection
Check
3) Remove over loaded
weight