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10.1 Fuses
The LEICA ABBE MARK II Refractometer electrical circuitry is
protected by two (2) fuses. To replace the fuses turn the Adjust-
ment Control Knob (Figure 1) two turns clockwise. This raises the
elevator assembly to provide clear access to the fuses. Remove
the adjustment control knob with a 1/8” Allen wrench. Remove
the two Phillips head screws which hold the right panel cover to
the bottom of the instrument housing. Slide the panel cover down
as far as possible to facilitate its removal. With the right panel
cover removed the fuses will be visible on the bottom plate of the
instrument (Figure 5b). Replace the fuses and reassemble.
11.0 CARE AND CLEANING
The LEICA ABBE MARK II Refractometer is a precision optical in-
strument designed for years of trouble-free operation. The interi-
or design has been carefully constructed for protection from dust
or spills. The exterior is painted with a durable enamel. The stain-
less steel refractive prism assembly is sealed with corrosion-
resistant epoxy.
The use of strong solvents such as N, N-Dimethylformamide or N,
N-Dimethylacetamide, cresols, phenols and other tar acids or
strong acetic solutions should be avoided. Materials such as
Tetrahydrofuran or some lacquer thinners and their components
can deteriorate the prism seal over a long period of time or when
applied in elevated temperatures.
An accumulation of dust, solvents or sample, particularly on the
prism assembly, may eventually penetrate the refractometer and
affect accuracy or accelerate wear.
When the instrument is not in use, the measuring prism assembly
should be kept closed with a folded sheet of lens tissue between
the prisms. The prism surfaces should be cleaned with distilled
water, methanol or an appropriate solvent immediately after
each sample is used.
Warm distilled water is recommended for removing sugar
residues and methanol for oil-based samples. The prism may be
wiped with lens cleaning tissue, but it should not be wiped with
a hard, dry cloth. After wiping the sample from the prism, rinse
the prism again with distilled water.
NNOOTTEE::
Do not wipe the measuring prism surface dry and do not
wipe it with anything if it is dry. Do not contact the prism or the
surrounding seal with metal or with sharp or pointed objects.
The glass parts of the prism assembly are relatively hard and
have excellent resistance to staining. Strong acids or bases
should not be measured with this instrument, nor used as clean-
ing agents.
To clean the eyepiece, snap out the rubber insert at the end of
the adjustable eyepiece tube. Clean the lens with a cotton swab
or lens tissue lightly dampened with acetone or methanol.
Replace the rubber insert.
12.0 SERVICING
The LEICA ABBE MARK II and LEICA ABBE MARK II Plus
Refractometers should be serviced or repaired by factory-
trained service and repair technicians. If operating difficulty is
experienced contact Leica’s Refractometer Customer Service
Department at 716-686-3000 or fax 716-686-3085. Outside the
United States contact your local Leica representative.
13.0 SPECIFICATIONS
LLEEIICCAA AABBBBEE MMAARRKK IIII RReeffrraaccttoommeetteerr MMooddeell 1133110044880000//1133110044881100
LLEEIICCAA AABBBBEE MMAARRKK IIII PPlluuss RReeffrraaccttoommeetteerr
MMooddeell 1133110044994400//1133110044995500
DDiissppllaayy
Direct reading LED
MMooddeess ooff OOppeerraattiioonn
Refractive index (n
D
),
%Solids (
O
Brix) and
temperature compensated
Brix - BX-TC
MMooddeess RRaannggee
nn
D
1.3200-1.7000
BBrriixx
0-95
BBXX--TTCC aatt 2200
O
0-95
TTeemmppeerraattuurree
O
CC
15º-50ºC
PPoowweerr RReeqquuiirreemmeennttss
Model 13104800 115V/60Hz
Model 13104810 230/50Hz
Model 13104940 115V/50-60Hz
Model 13104950 230V/50-60Hz
Illuminator Arm
Socket Adjustment
Screw
Illuminator Bulb
Revolving Condenser
Sleeve
FFiigguurree 55bb FFiigguurree 66
Warning:
Unplug the Refractometer Power Cord before attempt-
ing to check or replace fuses.
CAAUTION:
Replacement of fuses is not user serviceable. Fuses
must be replaced by qualified service personnel. The fuse shall
be replaced only with the same size, type and rating.
!
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