American Weigh Scales DP-500 - Manual (Page 4)

3. Gently hang the included 500g calibration hook
weight on the scales hook. Now press the [ON/OFF/
TARE] key one last time.
4. The scale will show "PASS". Calibration is complete.
IV. TROUBLESHOOTING
The primary reasons for inaccuracy or malfunction
are low batteries, incorrect calibration, overload or
operating under unstable conditions. 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] Solution:
Nothing, ,
Change the batteries.
[EEEEE] You are overloading the scale. Remove the
excessive load immediately!
[Oue2] The delicate weighing load cell has
been damaged by misusing the scale
(i.e. it was shocked, dropped or
overloaded). You can try recalibrating the
scale. If the load cell has not been
damaged too much it will work
again after recalibration.