Motic PM-1805 Bedienungsanleitung

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Motic Microscopes, European Division

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PM-2805

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1. Eyepiece

3. Analyzer

4. Revolving

nosepiece

5.Objectives

6. Stage clips

7. Stage

8. Condenser

9. Diaphragm

10. Filter holder

14. Bertrand Lens

13. Head

16. Arm

2. Eyepiece tube

17. Coarse focus

knob

18. Fine focus

knob

19.

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20. Light

intensity control

12. Base

15. Plates

and 1/4

11. Polarizer

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Thank you for your purchase of a Motic microscope. Motic microscopes are precision instruments, subjected

to meticulous examination in order to reach you in perfect condition. Their design combines easy

management and optimum functioning with minimum maintenance.

The information contained in this manual is likely to go beyond what the average user needs to know to use

the microscope, however, it is provided to answer any queries that may arise.

Your new microscope combines high performance features, with an excellent degree of optical resolution

and clarity of image It incorporates a circular rotating stage with a 1º graduation, that permits the exact

positioning of the sample. Objectives located on a ball bearing nosepiece allowing movement in both

directions, a precision coarse and fine focusing system; a moveable Abbe condenser with a numerical

aperture of 1.25 N.A. and a built-in 12V/ 20W halogen variable light source.

These instructions should be read carefully before operating the microscope. They will permit you to use

your new microscope to its fullest capabilities. Terminology used to describe components and controls can

be found in the diagram on page 2.

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All components of the microscope have been carefully packed to make sure they reach you in perfect

condition. We recommend that you do not discard any packing containers in case you need to return the

microscope or store it for long periods of time; or should it become necessary to transport it to a technical

service for any repair, or maintenance procedure.

The box should contain the following components, depending on the model:

• PM-1805: A microscope mounted with a monocular head, eyepiece, circular stage, 1,25 A.N.

condenser, three objectives, a polarizer integrated into the illuminator and an analyser. Also included

is a blue filter, a protective cover and two 2mm and 0.85mm hexagonal keys.

• PM-2805: A microscope with a monocular head with an analyser, a Bertrand lens and some

integrated plates λ and 1/4 λ, eyepiece, circular stage, 1,25 A.N. condenser, three objectives, a

polarizer integrated into the illuminator. Also included is a blue filter, a protective cover and two

2mm and 0.85mm hexagonal keys.

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A. Place the microscope in a vertical position on a flat, clean and stable surface.

B. Extract the rest of the components from the box.

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1. Head (13). Monocular and 360º rotating so that another user can observe without the necessity of

moving the microscope.

2. Eyepiece (1). The group of lenses closest to the eye, they magnify the image formed by the

objectives. In monocular models, the eyepiece contains a pointer to signal any particular aspect of a

sample to another user.

3. Revolving nosepiece (4). Magnification can be changed by rotating the nosepiece. An indicator in the

optical path indicates the correct positioning of the objective.

4. Objectives (5). The group of lenses closest to the sample or microscopic slide. They form the first

image.

5. Stage (7). Surface where the slide is placed. The stage is circular and can be turned 360º, stage

clips are also provided.

6. Condenser (8). Optimises the illumination to obtain a high level of resolution and image contrast.

7. Focus knobs (17-18). Situated on both sides of the microscope arm, the bigger, coarse focus knob,

permits a first approximate focus, and the smaller, fine focus knob, permits a precise adjustment of

focus.

In the model PM-1805 The knobs are separate, and on the model PM-2805 they are coaxial.

8. Illumination (19-20). These models include 12V and 20W Halogen bulb, pre-centred and can be

regulated in intensity.

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A. Filter: This filter should be used if the illumination on the field of vision appears yellowed.

Place the blue filter in the filter holder (11) situated under the condenser (10), open the filter holder

by pulling out horizontally. Make sure that the filter is placed correctly, and close the filter holder.

B. Analyser: Only for the PM-1805. Connect the analyser to the eyepiece (1). In the PM-2805 the

analyser is already installed in the head.

:DUQLQJ: Before connecting the microscope to a power source, ensure that the voltage coincides with that

of the microscope.

-4-

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A. Starting up.

1. Before using the microscope, adjust the intensity of

the light (20) to its minimum. This must be done

each time the microscope is turned on or off to

prolong the life of the bulb.

2. Press the power switch, to ON position. (Fig. 1)

3. Turn light intensity control until the image is lit up.

4. Light intensity should be adjusted according to the

objective used or the type of preparation observed.

B. Focussing the microscope.

1. Turn the revolving nosepiece (4) and place the 4X

objective (5) in the optical path, making sure that it has been correctly clicked securely into

place.

2. Turn the coarse focus knob (17) until the stage (7) is as low down as possible.

3. Place the microscopic slide on the stage, making sure that the cover slip is facing upwards.

4. Raise the stage clips by pressing down on the back end, place slide under clips, releasing

pressure so the slide is secured into place.

5. Ensure that the sample on the slide is in the optical eye.

6. Looking through the eyepiece (1), turn the coarse focus knob until the slide appears in focus.

7. Readjust the focus with the fine focus knob (18) until the image appears completely sharp.

C. Adjusting the aperture of the diaphragm.

The diaphragm aperture (9) should not be used as a light intensity control. Its function is to

obtain the best possible resolution of the sample in proportion with high image contrast. The

smaller the aperture, the better the image contrast, although if closed, too much resolution

will not be correct. The best approach is to experiment. Suggested apertures are as follows:

OBJECTIVE IRIS APERTURE

4X Totally closed to 1/8 open.

10X From 1/8 to 1/4

40X From 1/4 to 1/2

100X From 1/2 to 3/4

-5-

On switch

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D. Changing the magnification.

1. Position the 10X objective (5) in the optical path.

2. This microscope has already been parfocalised, although it is possible that there are small

differences between the objectives. In this case, the focus should be readjusted with the fine

focus knob (18).

3. When changing between objectives 40X y 100X (optional) do so with great care, ensuring

that the objectives do not rub against the slide and damage the lens front.

4. To obtain maximum resolution with the 100X objective (optional), it is necessary to apply

immersion oil between the cover slip and the front lens of the objective.

a. Only use a tiny amount of immersion oil, a drop should be enough.

b. If air bubbles appear, they can be eliminated by rotating the nosepiece slightly,

and then repositioning it.

c. After observing, all parts that have come into contact with immersion oil must be

cleaned. Use a soft cotton cloth, lightly dampened with Xylene. If the 100X

objective is not cleaned, the oil will dry on the lens front, and block the view. This

could also damage the lens.

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E. Critical illumination on bright field.

It is the optimum degree of illumination that perfectly proportions the group of elements used for

illumination, basically the condenser. To achieve critical illumination, an object on the illuminator

must be brought into focus.

1. Move the polarizer (11) from the illumination field.

2. In the case of the PM-1805, remove the analyser.

3. Focus on a slide with the 10X objective (5).

4. Place a flat object on the illuminator (19). The object must be one that allows light to pass

through, for example, a slide.

5. Without letting go of the slide, bring it into focus, moving the condenser (8) by turning the

collar with the other hand.

6. When critical illumination has been achieved, the slide can be removed from the illuminator.

If anything irregular appears in the field of view, an optical element of the illuminator appears

in focus for example, move the condenser slightly so it is out of focus. This should give you

the best illumination possible, and that closest to critical illumination.

-6-

F. Polarized illumination.

Light moves by vibrating on an infinite number of plains. The purpose of the polarizer is to provide

the light so that it moves in a single direction, on parallel plains. A secondary polarizer, known as the

analyser is situated above the objectives, “crossing” the primary polarizer: that is to say, placed at a

90ºangle to the emitted light of the primary polarizer, and so “blocking” the light’s path: what is called

the position of light extinction. Through the eyepiece the field of view then appears dark. Observation

through a polarizing microscope is called orthoscopic observation. Polarized light is mainly used for

the observation of mineral samples, although it can also be used to observe textiles, plastics, paper

and some biological specimens.

1. The polarizer (11) must be placed over the illumination field (19).

2. Without any slide placed on the stage, place the analizer (3) into 90ºposition. For the PM-1805

place the analizer onto the eyepiece and turn it until the field of view becomes dark.

For different observing techniques with polarising light,

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:$51,1* FOR YOUR SECURITY, SWITCH OFF AND REMOVE PLUG FROM POWER SOURCE

OUTLET BEFORE MAINTAINING YOUR MICROSCOPE, TO AVOID SHOCK OR FIRE HAZARD.

CONSULT YOUR DISTRIBUTOR IF YOUR MICROSCOPE REQUIRES ANY MAINTENANCE OR

REPARATION PROCEDURE NOT COVERED IN THIS INSTRUCTION MANUAL.

A. Optical Maintenance

1. Do not attempt to remove any optical component.

2. Before cleaning any lens, remove surface traces of dust using a fine brush, especially for lenses,

or with low pressure . Both can be obtained in any photography shop.

3. Cleaning the eyepiece

a. Do not remove the eyepiece (1) from the eyepiece tube. (2).

b. Only clean the lens surface, misting the lens with breath.

c. Afterwards, dry the lens with special lens paper in circular movements, from center out

to the exterior of the lens. Do not wipe the lenses when dry, as they can be easily

scratched.

4. Cleaning the objectives.

a. Do not remove the objectives (5) from the microscope.

b. Only clean the surface area. Use a soft cotton cloth dampened with Xylene. Dry the lens

using the same cloth.

5. Cleaning the condenser. (8)

a. Only clean the top lens surface of the condenser using any of the methods mentioned

above for cleaning the eyepieces or objectives.

-7-

6. Cleaning the illuminator lens. (19)

a. Only clean the top lens of the illuminator using any of the methods mentioned above for

cleaning the eyepieces or objectives.

B. Electrical maintenance

:$51,1* FOR YOUR SECURITY, SWITCH OFF AND REMOVE PLUG FROM POWER

SOURCE OUTLET BEFORE MAINTAINING YOUR MICROSCOPE, TO AVOID SHOCK OR FIRE

HAZARD.

1. Changing the bulb.

a. Place the microscope on its side with extreme

care, especially with the eyepiece (1).

b. Completely unscrew the 5 screws indicated

(Fig. 2).

c. Open the cap on the base.

d. With a cloth, carefully pull the bulb straight out

of the socket.

e. Do not touch the replacement bulb with hands.

Use a clean cloth and insert the pins of the

bulb into the socket.

f. If the bulb has been accidentally touched,

clean it as this could affect the transmission of light and the duration of the bulb.

g. Close the cap, and screw down firmly.

2. Changing the fuse.

a. With a flat screwdriver, press lightly on the slot on the fuse cap (Fig. 1) and 1/4 turn in

the direction of the arrow indicated.

b. Release pressure and the fuse cap should be able to be removed easily. Remove it

completely.

c. Remove the fuse by pulling it out, and insert the new one. Ensure that a 0.5 amp fuse is

being used.

d. Replace the fuse cap.

e. Repeat step (a.) this time 1/4 in the opposite direction of the arrow indicated. The cap

should be well closed.

C. Mechanical maintenance.

1. Adjusting the tension of the coarse focus control.

The tension adjustment control (Fig. 3) is located between the coarse focus knob (19) and the

arm (16). The coarse focus nov comes pre-adjusted by the manufacturer. The ideal tension point

is that which permits coarse focus knob to move as loosely as possible, without the stage (8)

moving down on its own.

-8-

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a. To adjust tension, first loosen the

screw located in the orifice of the

collar with the 2mm hexagonal

key.

b. To increase focus knob tension,

turn collar clockwise, to loosen,

turn anti clockwise.

c. Tighten hexagonal screw.

2. Adjusting stage stopper.

The 40X and 100X (optional) objectives incorporate security measure in that the lens tip

retracts to avoid damage to the front of the lens should it come into contact with the slide.

An additional measure of security consists of an adjustable stopper on the ascending

movement of the stage. The stopper comes pre-adjusted by the manufacturer for standard

slides with cover slips 0.17mm thick. For observing other types of samples, however, it may

become necessary to readjust the stage stopper.

a. Loosen the stage stopper screw (Fig. 3) with a 2mm hexagonal key.

b. For the PM-1805, with the fine focus knob (18) mid run, focus on the sample using only

the coarse focus knob (17) with firstly the 4X objective (5), and 10X objective.

For the PM-2805, focus using the coarse focus and the fine focus, with firstly the 4X

objective, and 10X objective

c. Tighten the stage stopper screw until firm enough for the stage (7) is supported, and

cannot ascend further.

-9-

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Coarse focus

tensor

Stage

stopper screw

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Bulb does not work. Plug outlet does not work

Cable not connected

Bulb burned out.

Fuse blown.

Wrong bulb.

Repair by a qualified specialised

technician.

Connect cable.

Replace bulb.

Replace fuse.

Replace by the correct bulb.

Bulb burns out in short time. Voltage too high. Reduce light intensity to a minimum

before turning the microscope on or

off.

Bulb burns out immediately. Wrong bulb. Replace with the correct bulb.

Bulb flickers. The bulb is not correctly inserted

into the socket.

Bulb about to burn out.

Fuse holder not locked into proper

position..

Loose connection at plug outlet.

Insert correctly.

Replace bulb.

Close correctly.

Repair by a qualified specialised

technician.

Fuse blows in short time. Wrong fuse. Replace with the appropriate fuse.

Fuse blows immediately. Short circuit Repair by a qualified technician.

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No image. Nosepiece not positioned properly.

Image too bright. Turn until clicks into place.

Reduce the intensity of the light.

Poor resolution. Dirty objective.

Dirty eyepiece.

Slide upside down.

Wrong cover slip used with slide.

Light too bright.

Dirty condenser.

Clean objective.

Clean eyepiece.

Replace the slide with the cover slip

facing upwards.

Use 0.17mm thick cover slips.

Reduce light intensity or adjust the

diaphragm aperture.

Clean condenser.

Spots in field of view Dirty eyepiece.

Dirty slide.

Dirty condenser.

Clean eyepiece.

Clean preparation.

Clean condenser.

Uneven illumination of field. Nosepiece not positioned properly.

Diaphragm aperture not sufficiently

open.

Turn until clicks into place.

Adjust appropriately.

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Does not stay in focus. The stage is sliding down on its own. Adjust the tension of the coarse focus

knob.

Does not focus. The stopper on the ascending

movement of the stage needs

adjusting.

Readjust the stopper.

-10-

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