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During use – A&D Weighing HR-202i User Manual

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3.2.

During Use

Note the following items to get accurate weighing data.

Discharge static electricity from the weighing material.

When a weighing sample (plastics, insulator, etc.)
could have a static charge, the weight value is
influenced. Ground the balance, and

Eliminate the static electricity using the optional AD-1683.

Try to keep the ambient humidity above 45%RH.

Use a metal shield case.

Wipe a charged plastic sample with a damp cloth.


This balance uses a strong magnet as part of the balance

assembly, so please use caution when weighing magnetic
materials. If there is a problem, use the underhook (on the bottom
of the balance) to suspend the material away from the influence of
the magnet.

Eliminate the temperature difference between the weighed

sample and the environment. When a sample is warmer (cooler)
than the ambient temperature, the sample will lighter (heavier)
than true mass. This error is due to the rising (falling) draft around
the sample.

Make each weighing gently and quickly to avoid errors due to

changes in the environmental conditions.

Before weighing with a minimum display of 0.01 mg for the

HR-202i, the "fine range breeze break ring" can be installed in
place of the "breeze break ring" to avoid errors caused by drafts.

Do not drop things upon the weighing pan, or place a weight

beyond the range of the balance on the weighing pan.

Do not use a sharp instrument (such as a pencil or ball point

pen) to press the keys, use your finger only.

Magnet material

40°C

20°C

Draft

Weighing pan

Charged material

Grounding

Metal case

Shock

Fine range breeze

break ring

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