A&D GH Series Manuál s instrukcemi stáhnout pdf (Strana 8)

A&D GR Series Instruction Manual

GB 8

Note the following instructions to get accurate weighing data.

• Press the RE-ZERO key before each weighing to prevent

possible error.

• Calibrate the balance periodically to avoid possible weighing errors.

• Carry out each weighing operation quickly to avoid errors due to

changes in the environment.

• Close glass doors to keep out draughts.

• Do not drop things on 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.

• Discharge static electricity from the weighed object. When weighing

material such as plastics, insulators, etc. which could have a static

charge, the weight value is influenced. Try to keep the ambient

humidity above 45%RH or to use the metal shield case.

• 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.

• Ensure there is little temperature difference between the weighed

material and the environment. When a sample is warmer (cooler)

than the ambient temperature, the sample will weigh lighter (heavier)

than the true weight. This error is due to the rising (falling) air next to

the sample.

• Take into consideration the affect of air buoyancy on a sample when

more accuracy is required.

• Operate your balance gently. Shorten the operation time as much as

possible (Opening and closing door, placing and removing material).

Use a pair of tweezers (pincette) to avoid temperature changes, due

to heat exchange from placing your hand into the weighing

chamber. There are two operation types for pressing a key.

Each key operation performs a different function.

1.5. Cautions during use to ensure Best Performance

-Z

Charged materials

Metal

Case

Earth

Magnetic Substance

Draft

40°C

20°C

tweezers

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 70 71

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A&D GH Series Manuál s instrukcemi Strana 8

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