American Weigh Scales (AWS) DIA-20 - Manual (Page 5)

remove any items from the weighing platform and
press the TARE key again to re-zero the scale.
VII. Add-Up Feature
1. In normal weighing mode, place an object on the
platform.
2. Once the weight is displayed, press the “ADD UP”
key and replace the item with another and press
“ADD UP” again.
3. The scale will display the sum of the two weights.
4. You may repeat until the scale reaches max capacity
(display will show 0 when capacity is exceeded)
VIII. Calibration
Calibration and adjustment are performed at the factory.
However, the weighing range can shift slightly during
shipping. Also, due to changes in local acceleration of gravity
around the world, adjustment is recommended when moving
the scale from one location to another. To check calibration:
1. Place the required calibration weight on the scale
and note the displayed value.
2. If the displayed value is not within acceptable
tolerance (see chart below), adjustment is required.
Model Acceptable
Tolerance (±)
Calibration
Weight
DIA-20 0.003g 10g, 20g
IX. Adjustment
1. Turn the scale on by pressing the ON/OFF key.
2. Wait for the display to show “0.000g” then press and
hold the 02'( key until the display shows “CAL”