Precautions; Before Use - A&D HR-250AZ Instruction Manual

To get the optimum performance from the balance and acquire accurate weight data, note the following:

3-1 Before Use

Install the balance in an environment where the temperature and humidity are not excessive.
The best operating temperature is about 20°C / 68°F at about 50% relative humidity.
Install the balance where it is not exposed to direct sunlight and it is not affected by 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 on the first
floor 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.
Ensure a stable power source when using the AC adapter.
Plug in the AC adapter and warm up the balance for at least one hour.
Calibrate the balance before use or after having moved it to another location.
Caution:
Do not install the balance where flammable or corrosive gas is present.

3. PRECAUTIONS

Make sure that the bubble is in the center of the red circle.
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