Leica DM2500, Manual

Page: 149 / 311

71
12. Care of the Microscope
Cleaning Glass Surfaces
Remove dust on glass surfaces with a fine, dry
and lint-free brush, or by blowing with a blow
bag or vacuum suction.
Carefully remove stubborn dirt on glass surfaces
with a clean cloth moistened with distilled water.
If the dirt still can not be removed, use pure alco-
hol, chloroform or benzine.
Cleaning Objectives
Caution!
The objective may not be unscrewed during
cleaning. If damage appears on inner sur-
faces, the objectives must be sent to your lo-
cal Leica dealer for repair. We also advise
against cleaning the inside surfaces of the
eyepieces.
The front lenses of the objectives are cleaned
as described under "Cleaning Glass Surfaces".
The upper lens is cleaned by blowing with a
pneumatic pump.
!
Removing Immersion Oil
Caution!
Follow safety instructions for immersion oil!
First, wipe off the immersion oil with a clean
cotton cloth, and then re-wipe the surface sev-
eral times with ethyl alcohol.
12.3 Handling Acids and Bases
For examinations using acids or other aggres-
sive chemicals, particular caution must be
taken.
Caution:
Never allow the optics and mechanical parts
to come into contact with these chemicals.
12.4 Changing Fuses
The fuse module (fig. 70) at the back of the stand
can be removed with a sharp object.
Fuse data
→
p. 8.
Order no.
→
p. 72.
Caution!
Never use any fuses as replacements other
than those of the types and the current rat-
ings listed here. Using patched fuses or
bridging the fuse holder is not permitted. The
use of incorrect fuses may result in a fire
hazard.
Fig. 70
Fuse module