American Weigh Scales LB-1000 - Manual (Page 5)

VI. TROUBLESHOOTING
The primary reasons for inaccuracy or malfunction
are low batteries, incorrect calibration, overload or
operating on an unstable surface. Please keep this in
mind and maintain and operate your scale properly.
This scale is a precise instrument and must be
handled with the utmost care and caution.
[Display] Elimination of errors
Change the batteries.
You are overloading the scale. Remove
the excess weight immediately to prevent
damage to the internal load cell.
There was a calibration error. Repeat
calibration.