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STRUCTURE
The Structure of MRP-5000 Microscope
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1. Eyepiece
2. Graduated Diopter Ring
3. Nosepiece with Objectives
4. Objective Stage
5. Adjustable Locking Nut
6. Tension Control for Focusing Knob
7. Coarse Focus Adjustment Knob
8. Fine Focus Adjustment Knob
9. Mechanical Stage X-Y Adjustment Knob
10. Condenser with Iris Diaphragm and Filter Holder
11. Field Diaphragm for Kohler Illumination
12. Dimmer Control for Brightness Adjustment
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OPERATING INSTRUCTIONS
Set light dimmer control to lowest intensity and switch on the power, increasing slowly
to desired level. Begin by placing a microscope slide containing a specimen to be
observed on the object stage and clamp it carefully with the movable spring clip. Adjust
the interpupillary distance between the two eyepieces to the most comfortable position
for the user. The left eyepiece is equipped with a diopter adjustment to fit the user's
needs.
Using the X and Y Direction Knobs located just below the stage (on the right hand side)
the specimen may be moved to the center of the stage for observation. Once the
specimen is in focus, the X and Y Direction Knobs may be adjusted to observe different
sections of the specimen.
Begin observation of your specimen with the 4X Objective. Turn the coarse focusing
knob until a clear image is obtained, then use the fine focus knob to enhance the
observation of the specimen to its clearest image. On the coarse focus knob is a tension
control ring (located on the right side of the microscope against the stand) which can be
turned to tighten or loosen the tension of the focusing knob to the user's desired setting.
When the desired view is obtained under the lowest power (4X), rotate the nosepiece to
the next higher magnification (10X). The nosepiece should "click" into position. It
should only be necessary to adjust the fine focus knob slightly to again have a clear view
of the specimen. As the magnification is increased, the user may also find adjustments in
the various methods of regulating the brightness (see below) will improve the view of
the specimen.
It is important to remember when adjusting the focus that the objective should never
touch the specimen. When increasing to 100X magnification, the objective will appear to
be very close to the slide. Because the 100X is an oil immersion objective, a drop of
cedar-wood oil or other immersion oil should be applied in the gap between the
objective and the specimen. (Note: all slides should be prepared with cover slips over
the specimen for observation under the 100X objective.) The 100X oil immersion
objective should be wiped off with a piece of soft clean cloth or lens tissue to remove the
immersion oil immediately after using.
This microscope is equipped with a "locking nut" (located behind the stage against the
arm of the stand) to help prevent the stage from moving up far enough to collide with the
objectives. This locking nut is pre-set in position at the factory and should not require
adjustment. If you find that the stage is not moving up far enough to get your specimen
in focus, try turning the locking knob slightly to allow the stage to travel farther.
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