Cleaning
Procedures
If
you
are
unsure
about
the
correct
cleaning
procedure
for
your
device
or
if
you
are
unsure
whether
the
procedure
given
here
is
suitable
for
your
device
,
check
with
the
manufacturer
or
sales
distributor
,
or
try
the
procedure
on
a
dummy
or
test
device
rst.
Cleaning
Cable
Connectors
Cleaning
connectors
is
dicult
as
the
core
diameter
of
a
singlemode
ber
is
only
about
9m.
This
generally
means
you
cannot
see
streaks
or
scratches
on
the
surface
.
T
o
be
certain
of
the
condition
of
the
surface
of
your
connector
and
to
check
it
after
cleaning,
you
need
a
microscope
.
In
the
case
of
scratches
,
or
of
dust
that
has
been
burnt
onto
the
surface
of
the
connector
,
you
may
have
no
option
but
to
polish
the
connector
.
This
depends
on
the
degree
of
dirtiness
,
or
the
depth
of
the
scratches
.
This
is
a
dicult
procedure
and
should
only
be
performed
by
skilled
personnel,
and
as
a
last
resort
as
it
wears
out
your
connector
.
W
arning
Never
look
into
the
end
of
an
optical
cable
that
is
connected
to
an
active
source
.
T
o
assess
the
projection
of
the
emitted
light
beam
you
can
use
an
infrared
sensor
card.
Hold
the
card
approximately
5
cm
from
the
output
of
the
connector
.
The
invisible
emitted
light
is
projected
onto
the
card
and
becomes
visible
as
a
small
circular
spot.
Preferred
Procedure
1.
Clean
the
connector
by
rubbing
a
new
,
dry
cotton-swab
over
the
surface
using
a
small
circular
movement.
2.
Blow
away
any
remaining
lint
with
compressed
air
.
Procedure
for
Stubborn
Dirt
Use
this
procedure
particularly
when
there
is
greasy
dirt
on
the
connector:
1.
Moisten
a
new
cotton-swab
with
isopropyl
alcohol.
2.
Clean
the
connector
by
rubbing
the
cotton-swab
over
the
surface
using
a
small
circular
movement.
3.
T
ake
a
new
,
dry
soft-tissue
and
remove
the
alcohol,
dissolved
sediment
and
dust,
by
rubbing
gently
over
the
surface
using
a
small
circular
movement.
4.
Blow
away
any
remaining
lint
with
compressed
air
.
An
Alternative
Procedure
The
better
,
more
gentle
,
but
more
expensive
cleaning
procedure
is
to
use
an
ultrasonic
bath
with
isopropyl
alcohol.
1.
Hold
the
tip
of
the
connector
in
the
bath
for
at
least
three
minutes
.
2.
T
ake
a
new
,
dry
soft-tissue
and
remove
the
alcohol,
dissolved
sediment
and
dust,
by
rubbing
gently
over
the
surface
using
a
small
circular
movement.
3.
Blow
away
any
remaining
lint
with
compressed
air
.
Cleaning
Procedures
E-5