During Use; After Use; Power Supply - A&D AD-4212C-300 Instruction Manual

3.3. During Use

To minimize the affect by electrical noises, earth
ground the weighing unit and the display unit (option).
Do not drop things upon the weighing pan, or place a
sample on the pan that is beyond the balance weighing
capacity. Place a sample in the center of the weighing
pan to minimize corner-load errors.
To prevent possible errors, before each weighing,
perform re-zero using the RS-232C command, or
calculate the difference between the weight value
before and after weighing.
Take into consideration the affect of air buoyancy on a sample when measuring the absolute
value with the minimum weighing value of 0.1 mg.
Even though the scale is dust-protected and protected against splashing water, complying with
IP65, be sure to clean the weighing pan and keep the conditions around the pan clean after
weighing powdery, fluid samples or metallic strips.

3.4. After Use

Avoid mechanical shock to the weighing unit.
Periodically calibrate the balance, using a calibration weight,.
Do not disassemble the weighing unit. Contact the local A&D dealer if the balance needs
service or repair.
Do not use organic solvents to clean the weighing unit. Clean the weighing unit with a lint free
cloth that is moistened with warm water and a mild detergent.
Avoid dust and water so that the weighing unit weighs correctly. Protect the internal parts from
liquid spills and excessive dust.

3.5. Power Supply

When the AC adapter is connected, the balance is in the standby mode if the standby indicator
is on (refer to "4. OPERATION OF WinCT-AD4212C"). This is a normal state and does not
harm the balance. For accurate weighing, plug in the AC adapter and warm up the balance for
the appropriate duration before use.
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