relative humidity of 8 to 80 percent. However, we in the
computer community try to keep all magnetic media
within a temperature range of 60 to 80 degrees
Fahrenheit, and a relative humidity of 30 to 60 percent.
Generally speaking, a temperature and humidity in
which you are comfortable will also be comfortable for
The users must also be made aware that they are to
keep all types of magnetic media, including diskettes, at
least one foot away from anything that generates a
magnetic field. This includes magnets of any kind, such
as those found in telephones, stereo speakers, and paper
clip dispensers, as well as magnets on copyholders and
inside of printers. It also includes motors, such as those
found in portable fans and floor buffers and polishers.
System Care and Operator/User Maintenance
The fact that microcomputer systems are small and
out in the workspaces doesnt mean they dont need
operator maintenance. They do. Dirt accumulates on
diskettes, disk drives, printers, display screens, and
keyboards. Static electricity can also be a major
problem, especially in areas where humidity is low.
Keep your system as clean as possible. One way to
do this is by using dust covers. This, of course, only
protects the system when it is not in use. You will still
need to clean the components on a regular basis.
Clean the floppy disk drive heads with a head
cleaning diskette. It is easy to do. Read the directions
that come with the head cleaning kit. They may have
you put fluid on the cleaning diskette. Then you insert
the cleaning diskette in the drive and activate (lower)
the heads for a few seconds. This helps reduce service
calls, and you are less likely to lose data. How often you
will need to do this will depend on how much the system
is used and whether the area is very dusty and smokey.
Some floppy disk drive manufacturers recommend
cleaning the heads no more than twice a year. As your
subject matter experts (SMEs), we recommend
cleaning the heads after 40 to 50 hours of actual use.
To clean keyboards, you can use specially angled
swabs with cleaning solution, and/or a portable vacuum
that has special attachments to reach between keys.
Vacuums of this type usually have dual-filter systems to
keep from blowing dust and dirt back into the room.
Ultra soft, thin bristle brushes are also available for
cleaning keyboards. We do not recommend you use
low-pressure air or canned air (a harmless gas under
pressure), as this cleaning method has a tendency to
blow dust and dirt into cracks, crevices, and electrical
components that could eventually cause you problems.
The display screen needs routine cleaning. A dirty
screen can be hard to read and may contribute to
headaches and fatigue. You will be able to see the dirt,
dust, and smoke buildup on the screen. The dust can
cause static electricity that may result in lost data. You
may use a liquid video spray cleaner, but do NOT spray
it on the screen. Spray it on a lint-free nonabrasive
cloth. A word of caution. Many commercial cleaning
solvents contain alcohol and other flammable agents. If
your display screen is on (energized) when it is cleaned
with one of these flammable fluids, combustion can
occur. An energized display screen can discharge quite
a bit of static electricity-a sufficient amount to ignite
alcohol. So, if you intend to clean your screen, turn the
monitor OFF first.
Also available are wet/dry
towelettes. These are convenient to use because the
cleaning solution is normally premeasured and they
come in individual packets. To reduce static electricity,
special antistatic sprays are available, or you can use
antistatic pads or mats.
Some cleaning solutions
include antistatic chemicals. An antistatic filter for the
display screen is another way to reduce static buildup.
Antistatic dust covers may also help when the system is
not being used.
Printers create their own bits of paper and dust. To
clean the printer, use a vacuum designed to clean
computer components. These vacuums are usually
portable, have a dual filtering system, and can clean in
small, hard to get places. Cleaning solutions and
specially shaped brushes are available for cleaning
platens. For cleaning the print heads, you can feed a
specially designed print sheet cleaner through the
printer just like you feed continuous-form paper. Laser
printers have special cleaning requirements. You use
dry lint-free clothes to wipe any residue of surfaces and
a cleaning brush to clean the antistatic teeth.
Operator/user maintenance is important for
effective operation of computer systems.
prevent data loss and will increase the life of the
computer system and its components. Establish
schedule for routine operator/user maintenance.