Cleaning The Optics - HP 5528A User Manual

Laser measurement system
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Model
5528A
Operator
Information
20-2
CLEANING THE OPTICS
WARNING
THE FOllOWING OPTICAL CLEANING PROCEDURES DO NOT
APPLY TO THE OPTICS IN THE LASER
HEAD.
CLEAN INC OF THE
LASER HEAD OPTICS REQUIRES ACCESS TO THE INTERIOR OF
THE INSTRUMENT WHERE HICH VOLTAGES CAN BE PRESENT.
THUS ALL LASER HEAD MAINTENANCE SHOULD BE
PER-
FORMED BY A QUALIFIED ELECTRONICS TECHNICIAN WHO
IS AWARE OF THE HAZARDS
INVOLVED.
A good
rule
for th
e exposed
glass surfaces is NEVER
LET
ANYTHING TOUCH THEM
.
A fingerprint
will
coll
ect dust and dirt which will redu ce the beam intensity by attenuating
and
dispersing the
beam.
Cleaning
the
optics sho
uld
be avoided
unless
the signal intensity
is
noticeably reduced
as
indicated
by
th
e
Beam
St
rength
Meter.
If
cleaning
Is
necessary,
you
mu st be
careful
to avoid rubbing
particles
into the antireflectivc
lens
coating.
Permanent
redu
ction
of
the
signal
intensity will
resu
lt.
Particles
can
be rinsed with a
gentle
stream of
pure indu strial grade methanol from a squirt
bottle.
Avoid alcohol contami
-
nation with the following pre cautions
-
1.
Use only
new
.
previou
sly
unopened
containers.
Al cohol
absorbs
water if
left exposed
to air.
This
will result in water
spots
when the
alcohol
evaporates.
2.
Transfer the al cohol to a
squeeze
bottle that
ca
n be capped and mad
e
airtight
3.
Never transfer alcohol back into
the
original
cOnlainer.

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