During Use; After Use; Power Supply - A&D AD-4212D-33 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.
 While cleaning, attaching the waterproof cap to the unit instead of the weighing pan results in
the AD-4212D becoming dust-proof and drip-proof and conforming to IP65. Be sure to clean the
weighing pan and keep the conditions around the pan clean after weighing powdery, fluid
samples or metallic strips.
 Balance status is indicated by the pilot lamp.
Lamp status
Turned off
Green
Red

3.4. After Use

 Avoid mechanical shock to the weighing unit.
 Periodically calibrate the balance using the internal weight or 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. BASIC OPERATON (WHEN USING THE AD-1691)"). 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.
Balance status
The power with the balance is not turned on.
Weighing mode
When turning on the power, when an error has
occurred, or during a re-zero or calibration
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