American Weigh Scales (AWS) CP3-650 - Manual (Page 4)

6. You may now remove the sample quantity and add
any amount of the material to the platform, and the
display will show a count.
7. You can switch between weighing and counting
mode by pressing [ PCS ] or [ UNITS ] respectively.
IV. CALIBRATION
Calibration is NOT required before first use. Only
calibrate if scale is not weighing properly.
**The CP3-650 calibrates with a 500g weight (not
included). The CP3-100 calibrates with a 100g weight
(not included)**
1. Turn the scale ON.
2. Hold the [ UNITS ] key for a few seconds. The
display will show "CAL".
3. Press the key again. "CAL" will flash, followed by
the required calibration weight (ie. 500g).
3. Place the calibration weight onto the platform.
4. The display will show "PASS" then return to normal
weighing mode. Calibration is complete!
V. TROUBLESHOOTING
[Display] Elimination of errors
-----------------------------------------------
[OUT2] Recalibrate the scale (Section IV).
[EEEE] You are overloading the scale. Remove the
excessive load immediately!
[un2T] Use the scale in a more stable position