How
to
clean
instruments
with
a
physical
contact
interface
Where
possible
,
remove
any
connector
interface
from
the
optical
output
of
the
instrument
before
you
start
cleaning.
Light
dirt
Use
compressed
air
to
blow
away
larger
particles
of
dirt.
Clean
the
instrument's
connector
with
a
dry
cotton
swab
.
Then
you
can
blow
away
any
remaining
laments
left
by
the
swab
.
Cleaning
in
this
was
is
appropriate
if
there
is
no
fat
on
the
surface
of
the
device
,
as
it
is
a
very
gentle
method.
Heavy
dirt
If
you
nd
sediments
like
fat,
you
should
moisten
a
cotton
swab
with
isopropyl
alcohol
and
clean
the
connector
.
Afterwards
,
use
a
soft
tissue
to
remove
the
alcohol,
any
dissolved
sediment,
and
the
dust.
Any
bits
left
behind
can
be
blown
away
with
compressed
air
.
Caution
Cleaning
an
instrument's
connectors
is
rather
tricky
,
as
the
core
diameter
of
a
single-mode
ber
is
only
about
9m.
Usually
this
means
that
you
will
be
unable
to
see
any
streaks
or
scratches
on
the
surface
.
Y
ou
should
use
a
microscope
to
be
absolutely
certain
of
the
amount
of
dirt
on
the
surface
of
your
connector
,
and
to
check
that
it
has
been
thoroughly
cleaned.
Do
not
press
the
swabs
or
the
soft
tissue
too
hard
onto
the
optical
surface
of
your
device
,
as
this
could
cause
scratches
and
other
damage
.
By
using
an
infrared
sensor
card
you
can
check
whether
the
projection
of
the
light
beam
is
correct.
Hold
the
card
approximately
50mm/2
inches
away
from
the
output
of
the
connector
.
The
invisible
beam
is
projected
onto
the
card
and
becomes
visible
to
the
naked
eye
as
a
small
circular
spot.
Never
look
into
the
end
of
an
optical
output
as
this
can
seriously
damage
your
eyesight.
If
you
are
unable
to
remove
the
dirt
as
described
above
,
you
should
examine
the
surface
of
your
optical
device
using
a
microscope
.
Do
not
try
to
clean
with
other
solvents
,
like
A
cetone
,
as
this
may
damage
your
optical
device
.
Cleaning
Procedures
E-7