A&D Weighing FX-300i-PT - Manual (Page 12)

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3. PRECAUTIONS BEFORE USE
To get the optimum performance from the balance and acquire accurate weighing data, note the
following, especially when using the AD-4212B-PT / AD-4212A-PT with a minimum weighing value of
0.01 mg / 0.1 mg.
„ Install the balance where the measurement environment is appropriate. The best operating
temperature is 15°C to 30°C ±0.5°C with greater than 50% RH.
„ Install the balance where it is not exposed to direct sunlight and it is not affected by air from
heaters or air conditioners. Especially be careful when using the AD-4212B-PT. It responds
even to very subtle air flow.
„ 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 passage way 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 the appropriate duration with nothing on the weighing pan.
AD-4212B-PT / AD-4212A-PT: one hour or more
FX-300i-PT: 30 minutes or more
„ Calibrate the balance before use or after having moved it to another location. Use the
accessory calibration weight for calibration. For details, refer to “7. CALIBRATING THE
BALANCE”.
Caution
Do not install the balance where flammable or corrosive gas is present.