LEITZ DIALUX 20 - Care and Maintenance

5 Care and maintenance
After use the micro s cope should be
covered with the flex ible dust cover.
The stand
should be cleaned from time
to time with a piece of linen or chamois
leather . No methylated spirit must be
used because it attacks the
enamel.
Petrol
is eminently suitable for the
cleaning of enamel surfaces.
Light stains on the object stage can
be removed by means
of rubbing it
with liquid paraffin or acid-free vaseline.
Special
care is indicated during in-
vestigat ion with acids or other corro-
sive chemicals. Direct contact of op-
tical systems and stand with these
chemicals must be avoided at all times
and all parts carefully cleaned after
use.
The
optical components of the micros-
cope must be kept scrupulously clean.
Dust on glass surfaces is removed
with a fine, dry sable brush; lightly
blow across the glass surface whilst
using the brush. Resistant dirt should
be removed with a piece of clean
linen
or soft chamois leather moistened
with a little distilled water . If even this
treatment fails, petrol or methylated
spirit should be used. Objectives must
not be dismantled for cleaning . If
damage inside the objectives becomes
evident , the objective should be re-
turned to the factory for repair . Special
care is recommended for the cleaning
of anti-reflection coatings .
The
coating of the external surfaces of
the eyepieces and of the front lenses
of the objectives is about as hard as
glass. But some of the coatings used
for internal surfaces of objectives and
eyepieces are very
soft indeed, and
you
must remove dirt very gently by
blowing across them. You therefore are
advised never to
clean internal sur-
faces yourself , nor to dismantle ob-
jectives for this purpose.
Proper treatment preserves the per-
formance of a LEITZ microscope for
many years. If however , ex amination or
re pair of a damaged instrument should
become necessary, one of our agencies
or our main factory should be con-
tacted.
Dimensions :
Width 25cm,
depth 44cm, height 40cm
(with Lamp Housing 102 Z) .
Wei
ght : approx . 11 kg.
37
Technical description
Fi g. 57
DI A LU X 20 EB with bui lt -in illumin ator, SK standard
cond enser,
Mec hanical Stage No. 78 and binoc ul ar
tub e S.
1 PERIPL AN eyepieces
2 Filt er s lot
3 Bin oc ular tub e S
4 Lever f or tube attachment
5
Knurled screw for a rr es ting the revolving nose-
piece
6
Adj ustable eyepiece tubes
7
Revolving n osepiece
8 NPL FLUOTAR objectives
9 Large
Mechan ica l Stage No. 78
10 Ape rtur e di aphrag m
11 Cen
tri ng sc rews for the condenser
12
Ad ju stable condenser stop
13 Co ntr ols for th e mechanical adjus tment of the
obj ect stag e
38
14 F ield dia phr agm
15
Voltmeter
16 Stand
17 Rotary knob for the coarse verti cal ad ju stment
of the
ob j ec t stage
19 Rotary knob f or brightn ess a dju stm ent
20 Lamp mo unt
22709 ·5 12 R