American Weigh Scales (AWS) MC-500 - Manual (Page 4)

5. Place the required weight (not included) on the
center of the platform.
6. The display will show “CAL” then “PASS”.
Calibration is complete! You can turn off the scale.
IV. 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
[Lo] Change the batteries.
[OUE2] Recalibrate the scale as shown above.
[O_Ld] You are overloading the scale. Remove the
excessive load immediately!
[UnST] Use the scale in a more stable position