Ross ACO-4400A, User Manual, Page: 108 / 112

10–2 • Service Information ACO-4400A User Manual (Iss. 03)
User Maintenance
General Care
Protect the instrument from adverse conditions, i.e. high humidity, high temperatures, etc. The
instrument is NOT waterproof.
When handling the unit or any of its controls, do so with clean hands. If necessary, use latex
gloves to protect the outer surfaces and controls from the accumulation of dirt and oil residues.
Do not use excessive force to operate any of the controls on the unit.
Exterior Cleaning
Clean the instrument periodically to prevent the accumulation of dust or dirt. Accumulated dust in
the instrument acts like an insulating blanket, preventing proper cooling, resulting in overheating
and ultimately premature component breakdown. Under high humidity conditions, accumulated
dust can also result in an electrically conductive path.
A vacuum cleaner may be used to remove accumulated dust on the outside of the instrument.
Ensure that the nozzle is fitted with a soft brush head (or similar) to avoid damaging the
instrument.
If the exterior surfaces or controls of the instrument require further cleaning, use a dry, lint- free
cloth or a soft-bristle brush. If dirt remains, use a cloth or swab dampened with a 75% isopropyl
alcohol solution. A swab is useful for cleaning in narrow spaces around the controls and
connectors. Do not use excessive amounts of the approved cleaning solution when cleaning the
instrument. Do not use abrasive compounds on any part of the instrument.
Preventive Maintenance
Preventive Maintenance mainly consists of periodic cleaning. Periodic cleaning reduces
instrument breakdown and increases reliability. Clean the instrument whenever needed (using the
guidelines outlined above), based on the operating environment. Dirty conditions may require
more frequent cleaning than a conventional “clean room” environment.
Warning
— To avoid personal injury, always remove the power cord before cleaning the
instrument.
Caution
— Avoid exposing the instrument to liquids, sprays or solvents, as this could
damage the unit. Cleaning agents may also damage the instrument. Avoid solutions that
contain harmful chemicals such as Acetone, Benzene, Toluene, Xylene, or similar.
Caution
— Do not allow moisture or dust to enter the instrument during exterior cleaning.
Only use enough solution to mildly dampen a cloth or similar. After cleaning, use de-ionized
water on a clean cloth to “rinse” the instrument.