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3. PRECAUTIONS BEFORE USE
Arrange the following setup conditions to prevent the negative effects of temperature change,
vibration, or drafts and ensure stable balance performance.
The BM series, especially the BM-20 / 22, has a high weighing sensitivity with a minimum weighing
value of 0.001 mg, so it is important to give proper attention to the setup conditions before using these
balances.
Install the balance where the measurement environment is appropriate. The best operating
temperature is 15°C to 30°C ±0.5°C with a humidity of 50%RH or greater.
Install the balance where it is not exposed to direct sunlight and it is not affected by air from
heaters or air conditioners.
Install the balance where it is free of dust.
Install the balance away from equipment which produces magnetic fields.
Install the balance in a stable place avoiding vibration and shock. Corners of rooms (close to
pillars or walls) far from a passageway are best, as they are less prone to vibration.
The weighing table should be solid and free from vibration, drafts and as level as possible.
Level the balance by adjusting the leveling feet and confirm it using the bubble spirit level.
Before use, warm up the balance for at least one hour with nothing on the weighing pan.
Calibrate the balance before use or after having moved it to another location. For details, refer
to “7. CALIBRATING THE BALANCE”.
Caution
Do not install the balance where flammable or corrosive gas is present.
