American Weigh Scales (AWS) AMW-250 - Manual (Page 5)

1. Place the empty container or vessel on the weighing
platform.
2. Press the TARE key once. The display will then
reset to zero. If the container is removed, it’s weight
will be displayed as a negative number.
3. You may now fill the container with the quantity to
be weighed. The display will show the net weight of
the contents.
4. To return to normal weight display (gross weight),
remove any items from the weighing platform and
press the TARE key again to re-zero the scale.
VII. 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
Recommended
Accuracy Class
AMW-70 0.02g 50g OIML M2
AMW-100 0.02g 100g OIML M2
AMW-250 0.2g 200g OIML M2
AMW-600 0.2g 500g OIML M2
AMW-1KG 0.2g 500g OIML M2