Rice Lake MC Series Mass Comparator, A&D Weighing - MC-30K - Manual (Page 11)

9
3-2. During Use
Discharge static electricity from the weighing material. When
weighing sample (plastics, insulator, etc.) could have a static
charge, the weighing value is influenced. Ground the balance, and
Eliminate the static electricity by using an optinal static
eliminator, AD-1683.
Or try to keep the ambient humidity above 45%RH at the room.
Or use the metal shield case.
Or wipe a charged material (plastic sample etc.) with the wet cloth.
This balance uses a strong magnet as part of the balance
assembly, so please use caution when weighing magnetic
materials such as iron. If there is a problem, use the underhook on
the bottom of the balance to suspend the material away from the
influence of the magnet.
Eliminate any temperature difference between the sample and the
environment. When a sample is warmer (cooler) than the ambient
temperature, the sample will be lighter (heavier) than the true
weight. This error is due to a rising (falling) draft around the sample.
Make each weighing gently and quickly to avoid errors due to
changes in the environmental conditions.
Do not drop things upon the weighing pan, or place a sample on
the pan that is beyond the balance weighing capacity. Place the
sample in the center of the weighing pan.
Do not use a sharp instrument such as a pencil to press the keys.
Use your finger only.
Press the RE-ZERO key before each weighing to prevent
possible errors.
Calibrate the balance periodically so as to eliminate possible errors.
Take into consideration the affect of air buoyancy on a sample
when more accuracy is required.
It is possible to check the reference card for principle operation.
Prevent foreign matter, such as powder, liquid and metal, from invading the area around
the weighing pan.
Use the "breeze break" for a precision weighing.
3-3. After Use
Avoid mechanical shock to the balance.
Do not disassemble the balance. Contact the local A&D dealer if the balance needs service
or repair.
Do not use organic solvents to clean the balance. Clean the balance with a lint free cloth that
is moistened with warm water and a mild detergent.
Material case
Charged
sample
Magnetic
material
40°C 20°C
Draft
Weighing Pan
Grounding
Shock