STEINDORFF NYMCS-931 User manual

STEINDORFF®
Multi-Head Biological Microscope
NYMCS-931
Instruction Manual
This manual is for biological microscope Model NYMCS-931. To ensure the safety, obtain optimum
performance and to familiarize yourself fully with the use of this microscope, it is strongly recommended
that you study this manual thoroughly before operating the microscope.

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A. Applications:
The biological microscope NYMCS-931 is designed for 2 persons to view simultaneously and is
provided with achromatic objectives, wide field eyepieces, abbe condenser, adjustable built-in
light source and also coaxial coarse and fine adjustment with focus stop. This microscope with
his wide field eyepieces gives a nice and sharp image and is designed in a very modern way. It is
specially designed for clinical examination and teaching demonstration in laboratories, colleges
and medical field, it is also an ideal instrument for biological bacteriological, pathological and
pharmaceutical research.
B. Specifications：
1. 2PCS of Binocular head
2. Eyepiece：
Designation
magnification
field of view
focal length
WF eyepiece
10x
18mm
24.95mm
3. Objective:
Designation
Magnification
numerical aperture
Working distance
(mm)
Achromatic
4x
0.1
37.5
10x
0.25
7.316
40x
0.65
0.632
100x
1.25
0.198
4. Total magnifications:
Objective
4x
10x
40x
100x
Eyepiece
10x
Total magnification
40x
100x
400x
1000x
5. Conjugate distance: 195mm
6. Abbe condenser: NA=1.25 with iris diaphragm and filter
7. Coarse focusing range: 30mm with coarse focusing stop
8. Fine focusing range: 30mm with focusing division interval: 0.002mm
9. Area of Double layers mechanical stage: 140X140mm
Moving range: 75X50mm
10. Built-in illumination, 6V20W halogen lamp
C. Structure：
1. Mounting
Mounting is the base of the microscope. It supports the all weight of the microscope. This
mounting has four rubber foots and that makes this instrument stable.

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2. Illumination system:
In order to make observed specimen have enough brightness and make the resolving power
of the objectives be used fully, this instrument adopt 6v20w built-in brightness variable
lamp. It composed with condenser and iris diaphragm, turning the iris of the condenser and
making the aperture of condenser suitable for the aperture of objective, the condenser is
composed of two parts. One is installed on trestle. This trestle can move up and down by
rack and gear. The light axis of the condenser must coincide with the light axis of this
instrument. When it diverge, adjust three screws in the trestle of the condenser. The other
is installed on the mounting.
3. Stage and shifter:
Stage is installed on stage rack. It can move up and down and is perpendicular to optical
axis .the shifter can make the specimen move transversely and longitudinally.
4. Eyepiece, objective and nosepiece;
The microscope imaging system is composed of eyepiece and objective according to their
magnifications. Rotate the objectives into the threaded holes of the nosepiece. So that when
turning the nosepiece. You can change the objectives and get the needed magnification
swiftly. The nosepiece adopts precise and advanced structure .when changing the
objectives, the center area of the field view always locates within the range of observing
and satisfies the focusing requirement.
Three persons observe in the same time, two monocular heads and one binocular can rotate
3600, in the field view, the center of the image is coincident. This is guaranteed by the
instrument, so that the operator do not adjust by themselves. The eyepiece tube is inclined
450, so it observed comfortable and convenient.
5. Coarse and fine focusing equipment
This instrument adopts coaxial coarse and fine focusing equipment. The knobs are located
below the stage. So it is easy to operate coarse focusing range is 30mm. Fine focusing
range is 30mm too. There is knob beside each coarse focusing knob. One is used as
tightness adjustment for coarse focusing knob. The other is used as coarse focusing stopper.
When you lower the stage and raise it again the stage is at the same level. When you do
not the location, you can turn the flange of the stopper and loose it.
D. Usage:
1. Rotate the objectives in sequence, according to their magnification, into the 4 thread of the
nosepiece. Insert the eyepiece into the inclined eyepiece tube.
2. Put the specimen on the stage. Adjust shifter and make the specimen in the center of the
hole of the stage.
3. First use objective 10x, turn the coarse focusing knob and make the objective near specimen
and then observe the image through eyepiece and turn the coarse focusing knob down until
you can see the specimen image. After that turn the fine focusing knob until you get a sharp

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image. Because this instrument adopts precise and reliable nosepiece, you can always
observe a clear image with different objectives.
E. The complete set of the microscope:
Items
Contents
Quantity
1
Main Body
1set
2
Eyepiece P10x
4 pcs
3
Objective 4x,10x,40x,100x
1set
4
Binocular head
2pcs
5
Shifter
1pc
6
Spare lamp
1pc
7
Operation manual
1 copy
F. Maintenance:
1. The microscope is the same as other optical instrument. Need to be kept in cool, dry, dustless
and acid-less place. The instrument should be covered with dust guard after using.
2. Never disassemble the lens because they are corrected stringently. If there is stain on the lens,
it can wipe out by alcohol, but you should pay attention not to seep it into the inside of the
objectives so as not to dissolve glue. Dust on the lens can be wiped away by clean brush.
3. Coarse and fine focusing equipment and nosepiece are precisely constructed and should not
be dismantled without authorization.
4. When not in use, keep the objectives in the objective box and cover the eyepiece tube with
eyepiece tube cover.