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General Care
Inspection and
Cleaning Procedures
Inspection and Cleaning
Inspection and Cleaning describes
how
to
inspect
and
clean the TAS 475
and
TAS 485 Analog Oscilloscopes. Inspection and cleaning are preventive
maintenance. Preventive maintenance,
when
done
regularly,
may
prevent
oscilloscope
malfunction
and
enhance its reliability.
Preventive maintenance consists
of
visually inspecting and cleaning the
oscilloscope
and using general care when operating it.
How
often
to
do
maintenance
depends
on
the
severity
of
the
environment
in
which
you use the oscilloscope. A
proper
time
to
perform preventive mainte-
nance
is
just
before
oscilloscope
adjustment.
The cabinet
helps keep
dust
out
of
the
oscilloscope
and
it
is
a major
compo-
nent
of
its
cooling
system. It should normally
be
in
place when operating the
oscilloscope. The oscilloscope's front
cover
protects
the
front panel and
display
from
dust
and
damage. Install it when storing
or
transporting the
oscilloscope
.
Inspect
and
clean
the
oscilloscope
as often as operating conditions require.
The
collection
of
dirt on
components
inside can cause
them
to
overheat and
breakdown. (Dirt
acts
as an insulating blanket, preventing efficient heat
dissipation.) Dirt
also provides an electrical
conduction
path that could cause
an
oscilloscope failure, especially
under
high-humidity conditions.
Avoid the use
of
chemical cleaning agents that might damage the
plastics used in this oscilloscope.
Use a 75% isopropyl alcohol
solution
as a cleaner
and
rinse with deionized
water.
Use only
deionized water when cleaning the menu buttons
or
front-panel
buttons. Before using any other type
of
cleaner, consult your
Tektro-
nix Service Center
or
representative.
Avoid the use
of
high pressure compressed air when cleaning dust
from the interior
of
this instrument. (High pressure air can cause
ESD.)
Instead, use
low
pressure compressed air (about 9 psi) .
TAS 475 and
TAS
485 Service Manual
6-5
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