DIGITAL WEIGHING INDICATOR
SI 4000
43
7. Error & Treatment
7-1. Load Cell Installation
Error
Cause
Treatment
Remark
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
3. Check attach point with
other devices.
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
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