American Weigh Scales AT-500 - Manual (Page 3)

I. OPERATION
Place Scale on a horizontal flat surface and remove
the metal ash tray cover before weighing.
1. Press the [ON/OFF] key.
2. Wait until "0.0” is displayed.
3. Place the object(s) on the weighing platform.
4. Using the [MODE] key, you can switch between
weighing units.
II. TARE WEIGHING
1. Turn on scale as described above.
2. Place the "tare item" such as a tray on the platform.
3. Press [TARE] and wait until "0.0g" is displayed.
4. Add the "net-weight-item".
III. CALIBRATION
Calibration is NOT required before first use. Only
calibrate if scale is not weighing properly.
1. Turn the scale ON and wait for the display to go to
“0.0g”.
2. Press and hold the [CAL] key until the display
shows "CAL". Now release the key.
3. The display will flash "0.0g". Ensure that no weight
is on the scale and press the [CAL] button to calibrate
the zero point of the scale.
4. The display will now flash "200.0g". Place a 200g
calibration weight (not included) onto the center of the
platform and press the [CAL] key once more.
5. The display will show "PASS". Calibration is
complete!