Omax M824PLAN Series, M834 Series User Manual

User Manual

Trinocular Compound

Microscope

Model M834 Series

MicroscopeNet.com

Table of Contents

i. Caution……..……………………………………………………………1 ii. Care and Maintenance……….………………………………….….…2

1. Component Illustration………………………….…………………..…3

2. Installation ……………………………………………………………...4

3. Operation...

…………………….………………………….…………....7

4. Specifications…………………….………………………………….....10

5. Optional Parts …………………….………………………….………...11

6. Troubleshooting Guide………………….…………………….………13

7. Darkfield Condenser Installation and Operation Instructions ……..15

8. Phase Contrast Kit Installation and Operation Instructions ……..…16

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i.

Caution

1. Find the “UP” sign and place the Styrofoam container on your table or bench so that the arrow is pointing upward. Open the shipping carton carefully to prevent any accessory items (i.e. objectives or eyepieces) from dropping and being damaged.

2. Do not discard the molded Styrofoam container. The container should be retained should the microscope ever requires reshipment.

3. Keep the instrument out of direct sunlight, high temperature or humidity, and dusty environments. Ensure that the microscope is located on a smooth, level and firm surface.

4. If any specimen solutions or other liquids splash onto the stage, objective or any other component, disconnect the power cord immediately and wipe up the spillage. Otherwise, the instrument may be damaged.

5. All electrical connectors (power cord) should be inserted into an electrical surge suppressor to prevent damage due to voltage fluctuations.

6. Important: the lamp, lamphouse and adjacent parts will become very hot during or short after operation. Do not touch these parts until they have completely cooled. Never attempt to handle a hot halogen bulb or mercury bulb.

7. Make sure there is sufficient room around the microscope base for heat elimination.

8. For safety when replacing the lamps or fuses, be sure the main switch is off, unplug the power cord, and only replace the bulb after the bulb and the lamphouse has completely cooled.

9. Do not touch the surface of halogen bulbs with bare fingers. If so, clean the surface with soft cloth.

10. Important: confirm that the input voltage (220V version available, contact seller) indicated on your microscope corresponds to your line voltage. The use of a different input voltage other than that as indicated will cause severe damage to the microscope.

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ii.

Care and Maintenance

1. Do not attempt to disassemble any component including eyepieces, objectives or focusing assembly.

2. Keep the instrument clean; remove dirt and debris regularly. Accumulated dirt on metal surfaces should be cleaned with a damp cloth. More persistent dirt should be removed using a mild soap solution. Do not use organic solvents for cleansing .

3. The outer surface of the optics should be inspected and cleaned periodically using an air stream from an air bulb. If dirt remains on the optical surface, use a soft cloth or cotton swab dampened with a lens cleaning solution (available at camera stores).

All optical lenses should be swabbed using a circular motion. A small amount of absorbent cotton wound on the end of a tapered stick makes a useful tool for cleaning recessed optical surfaces. Avoid using an excessive amount of solvents as this may cause problems with optical coatings or cemented optics or the flowing solvent may pick up grease making cleaning more difficult. Oil immersion objectives should be cleaned immediately after use by removing the oil with lens tissue or a clean, soft cloth.

4. Observe the specimen with the 4X, 10X and 40X objectives in order, then observe the specimen with the 100X objective. Apply the immersion oil on the slide cover with the 100X objective. Do not let the immersion oil to contact with the dry objectives lens (especially the 40X). Clean the dry objective lens using the lens cleaning paper if the immersion oil is on the dry objectives lens. Clean the 100X objective lens first using the lens cleaning paper after observing the specimen with the 100X objective, then clean the specimen. More persistent dirt should be removed using a little bit alcohol. Do not use organic solvents for cleansing .

5. Store the instrument in a cool, dry environment. Cover the microscope with the dust cover when not in use.

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6

5

4

9

7

8

10

1

2

3

1.

Components Illustration


7

8

5

6

1

2

3

4

11

Photo Tube

Viewing Head

Microscope Body

Slide Holder

9 Fine Focus Knob

10 Power Switch

11 Microscope Base

12 Eyepiece

Condenser Lock Thumb Screw 13 Diopter Adjusting Ring 21

Condenser Focus Knob 14 Eyepiece Tube 22

Stage Upward Stopper

Coarse Focus Knob

15

16

Nosepiece

Objectives

17

18

19

20

Mechanical Stage

Condenser

Condenser Holder

X-Y Stage Moving Knobs

Light Collector

Brightness Intensity Dial

22

19

20

21

12

13

14

15

16

17

18

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2.

Installation

Set Screw

2.1 Installation of the trinocular viewing head ( Fig.1

)

1) Loosen the set screw on the top of the microscope body and remove the plastic cover.

2) Remove the cap on the dovetail of the trinocular viewing head.

3) Seat the dovetail of trinocular viewing head into the socket on the top of microscope body completely and tighten the set screw.

Fig. 1

Caution :

Do not release the viewing head from your hand grip until you are sure the viewing head is installed securely.

2.2 Installation of the photo tube

1) Remove the cap on the top of the viewing head.

2) Thread the photo tube into the top of the viewing head.

2.3 Installation of the eyepieces

1) Remove the protective caps from the eyepiece tubes.

2) Insert the eyepieces into the eyepiece tubes.

2.4 Installation of the objectives

1) Adjust the coarse focus knob until the mechanical stage is at its lowest position.

2) Turn the caps counter-clockwise to remove them from the nosepiece.

3) Take the objectives out from the plastic cases and turn each one clock-wise into the holes on the nosepiece. Install the 4X objective into the nosepiece first. Then in a counter-clockwise direction, rotate the nosepiece and install each succeeding higher magnification objective as shown in Fig. 2 .

Fig.2

Note:



Inspect the objectives frequently for dirt or oil; clean if necessary.



Use the 10X objective to initially focus the image of your specimen.



When changing the objective magnification, rotate the objective nosepiece until you hear a “click” sound or have a clear “in position” feeling. This ensures the objective is centered in the optical light path.

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2.5 Installation of the glass color filter

1) Swing out the filter holder under the condenser.

2) Insert the filter into the holder as shown in Fig. 3 , swing the holder in.

Color Filter

Color Filter Holder Fig. 3

2.6 Installing (or changing) the halogen bulb

1) Turn the power off and disconnect the power cord.

2) Allow some time to cool down the lamp and light housing.

3) Take the eyepieces off and check if the view head is securely locked by the set screw. Put the microscope down on its back gently.

4) Open the cover on the bottom of the base by pull the knob. Take out the dead bulb and insert the new bulb. Be sure the pins on the bulb are completely inserted into the lamp socket. See Fig. 4

5) Close the cover.

Knob

Bulb

Fig. 4

Caution:

Don’t touch the Halogen bulb with your bare fingers. The fingerprints left on the bulb will shorten the bulb’s life.

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2.7 Replacing the fuse of bottom light power supply

1) Turn off the power and disconnect the power cord.

2) Loosen the 5 screws on the back board and open the board.

3) Find the fuses on the board inside and take it (them) out.

See Fig. 5 .

4) Put in the new fuse(s) and put the board back its place.

5) Tighten the 5 screws.

2.8 Installation of the camera (optional, may not included in your package)

1) Take off the plastic cover from the photo tube.

2) Insert the camera into the photo tube, and then connect the camera to a computer via USB2.0 cable.

See Fig. 6 .

Photo Tube

3) The manual for the camera is on a CD (or mini CD).

Refer to the manual to install the driver and software on to the computer.

4) The camera is optional and may have different color and shape from the one in the figure, depending on the model purchased.

Fig. 5

Fuses

Camera

2.9 Installation of darkfield condensers (optional, may not included in your package)

Fig. 6

Please see section 7 (Darkfield Condenser Installation and Operation Instructions)

2.10 Installation of phase contrast kit (optional, may not included in your package)

Please see section 8 (Phase Contrast Kit Installation and Operation Instruction)

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3.

Operation

3.1 Adjusting illumination

1) Plug the power cord into the power socket on the microscope and connect it to the power outlet.

2) Turn on the power switch.

3) Rotate the brightness intensity dial to increase or decrease the brightness.

Caution:

A diffusion filter is attached beneath the condenser to get uniform light and protect your eyes from strong light when a low power objective applied. The diffusion filter can be swung out to make the view field brighter when observing with a high power objective, such as 100X objective.

3.2 Placing specimen

1) Place the slide on the mechanical stage.

2) Use the slide holder to gently secure the slide.

3) Turn the X-Y stage moving knobs to position the specimen in the center of viewing head.

Caution:

Be sure not to allow an objective to touch a specimen slide when changing objectives.

3.3 Focusing

1) With the 10X objective in position, raise the mechanical stage using the coarse focus knob until the specimen is close to the objective.

2) Turn the coarse focus knob until the specimen is in focus.

3) Use the fine focus knob to obtain a sharp image.

4) To get a good focused image, you may need to combine the focus knob adjustment and interpupillary distance adjustment, along with eyepiece diopter adjustment stated in 3.6 and 3.7

.

5) You may now switch to another magnification objective.

Tips:

To prevent your specimen slide from making contact with an objective, raise the stage to its highest position without contacting the 100X objective, then tighten the stage upper stopper ( Fig. 7 ) . Give the stage a tiny extra moving space to ensure the objective can be focused every time.

Stage Upward Stopper

3.4 Applying the immersion oil

1) Rotate the objective nosepiece to seat the observing position between the 40X and 100X objectives as shown in Fig. 8 (a) .

2) Place a drop of immersion oil on the slide cover as shown in Fig. 8 (b) .

Fig. 7

3) Rotate the objective nosepiece to seat the 100X objective to the observing position until you hear a “click” sound.

4) After observing the specimen, use the lens cleaning paper to clean the 100X objective lens gently and the specimen in time.

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Fig.8 www.microscopenet.com

5) If it is hard to clean, you need a little bit alcohol to clean the 100X objective lens and the specimen.

(a) Fig. 8

(b)

Caution (important):



When you use the 100X objective to observe the specimen, you have to finish observing the specimen with the 4X, 10X, 40X objectives.



When you use the 100X objective to observe the specimen, you have to apply the immersion oil on the top of the slide cover.



When you apply the immersion oil with the 100X objective, do not let the immersion oil to contact with the dry objective lenses (especially the 40x). If the immersion oil is on the dry objectives lens, please use the lens cleaning paper to clean the objectives lens in time. The oil will damage the dry objective lenses.



After observing the specimen with the 100X objective, clean the 100X objective lens first.

3.5 Adjusting condenser

1) Turn the condenser focus knob to raise or lower the condenser.

2) The condenser is raised when using high magnification objectives and lowered when using low magnification objectives.

Note:



The centering of the condenser and the light axis of the objective are factory adjusted. Do not attempt re-adjustment.



The highest position of the condenser has been factory adjusted. Do not attempt re-adjustment.

3.6 Adjusting interpupillary distance

While observing with both eyes, hold the left and right eye tubes, swing inwards and outwards. The interpupillary distance is correct when the left and right fields of view converge completely into one image.

3.7 Adjusting eyepiece diopter

1) Using the 10X objective and your right eye only, observe your specimen through the eyepiece and bring it into focus by adjusting the focus knobs.

2) Then observe the specimen with your left eye only through the left eyepiece. If the specimen is not in focus, rotate the diopter ring until a sharp image is obtained.

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3.8 Adjusting Iris diaphragm

Swing the iris diaphragm lever ( Fig. 9 ) left or right to adjust the aperture size.

Note:

The iris diaphragm is designed to adjust the aperture size, not to adjust the brightness although the brightness will be changed when it's adjusted.

When aperture is adjusted to smaller size, the contrast will be increased and the depth of field will be increased as well. Turn up the intensity of the light if the image is too dim.

3.9 Adjusting focus tension

The focus tension has been pre-set at the factory. If the mechanical stage drops by itself, rotate the focus tension ring ( Fig. 10 ) situated between the coarse focus knob and microscope body on the right side until the tension is in maintained.

Iris Diaphragm Lever

Fig.9

3.10 Camera (optional, may not included in your package)

1) Bring the microscope into focus by following the procedures in 3.3

.

2) Install the camera by following the procedures in 2.8

.

Focus Tension Ring

3) Open image observing software to examine (more details see camera's manual).

4) If the image is not clear, loosen the set screws (See Fig.

11 ) on the photo tube, turn the upper half part to lower down or raise up the camera mounted on the top, till the image is clear.

5) You also can capture images or record live videos through the software, depending on the functions provided by the software.

Fig.10

Note:

Please refer to the manuals in the camera’s CD for the details of installation and operation of the camera.

Fig.11

Set Screw

3.11 Darkfield condensers observation (optional, may not included in your package)

Please see section 7 ( Darkfield Condenser Installation and Operation Instructions )

3.12 Phase contrast kit observation (optional, may not included in your package)

Please see section 8 ( Phase Contrast Kit Installation and Operation Instruction )

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4.

Specifications


Model

Total Magnification

Viewing Head

Photo Tube

Eyepieces

Objective Tube Length

Nosepiece

Objectives

Condenser

Focus Mechanism

Mechanical Stage

M834 series

General

40X, 64X, 100X, 160X, 400X, 640X, 1000X, 1600X

Trinocular, Siedentopf, inclined 30º, swiveling 360º

Swing interpupillary adjustment, 2-3/16" ~ 2-15/16" (55 ~ 75mm)

Adjustable diopter on left eyepiece tube

Height adjustable

1 pair of WF10X/18

1 pair of P16X

160mm

Reversed revolving quadruple

DIN achromatic 4X, 10X, 40X (spring), 100X (spring, oil)

Abbe, NA=1.25, w/ iris diaphragm and filter holder

Rack and pinion adjustment

Coaxial coarse and fine focusing knobs on both sides w/ stage upward stopper

Minimum fine focusing adjustment at 0.002mm, range 30mm

Large double layer mechanical stage

Dimension: 51/2” x 4-1/4” (140mmx110mm)

Movement range: 3 ” x 2” (78mm X 52mm)

Cameras ( optional ) Refer to the cameras specifications

Darkfield Condensers ( optional ) Refer to the darkfield condensers specifications

Phase Contrast Kit ( optional )

Carrying Case (

Illumination

Power Supply

Dimension

Net weight optional )

Refer to the phase contrast kit specification

Net weight: 9 lbs 4.5 oz (4.25 kg)

Size: 17-1/2" x 11-1/4" x 14-1/8" (44.5cm x 28cm x 36cm)

Transmitted: 6V/20W, halogen, variable intensity

AC 110V-115V, 50/60HZ (US and Canada plug)

(220V version available, contact seller)

141/8” x 9-1/8” x 19” (36cm x 23cm x 48cm)

20 lbs (9 kg)

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5.

Optional Parts

The optional parts may be included in some models or sold separately.)

1) Cameras

Model Resolution Operating System Software

A1502 640 x 480 (0.3MP)

A1510 1280 x 1024 (1.3MP)

A1520C 1600 x 1200 (2.0MP) MS Windows

(32/64-bit)

Mac OS

Included

A1530X 2048 x 1536 (3.0MP)

A1550X 2592 x 1944 (5.0MP)

A1590 3488 x 2616 (9.0MP)

2) Darkfield Condensers

Model

Darkfield

Condenser

Numerical

Aperture

MS Windows

(32/64-bit)

Objective

A191 Dry 0.7-0.9 -

A191BOIL Oil 1.36-1.25

Plan 100X/1.25 oil-0.5

160/0.17(spring), w/ iris diaphragm

Mounting

Size(diameter)

37mm

37mm

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3) Phase Contrast Kits

Model Phase Contrast Objective

A1PHB1

A1PHB3

Plan achromatic 10X with built-in phase plate

Plan achromatic 20X with built-in phase plate

Plan achromatic 40X with built-in phase plate, spring

Plan achromatic 100X with built-in phase plate, spring, oil

Achromatic 10X with built-in phase plate


Achromatic 40X with built-in phase plate, spring

Achromatic 100X with built-in phase plate, spring, oil

A1PHC1

Plan achromatic 10X with phase plate

Plan achromatic 40X with phase plate

Condenser Annular Ring Plates

NA 1.25

Centering

Telescope five positions:

10 for 10X phase contrast objective




B for bright field observation, with iris diaphragm five positions:





B for bright field observation, with iris diaphragm three positions:


40 for 40X phase contrast objective middle position for brightfield observation focusing adjustable

A1PHD


Achromatic 40X with built-in phase plate, spring

Achromatic 100X with built-in phase plate, spring, oil



100 for 100x phase contrast objective

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6.

Troubleshooting Guide

GENERAL PROBLEMS

Problem

Lamp does not light when switched on

Darkness at the periphery or uneven brightness in the field of view

Dirt or dust on the view

Poor image quality or not able to get focused image www.microscopenet.com

Cause

No electrical power

Lamp bulb burnt out

Fuse blown out

Revolving nosepiece not in click stop position

Solution

Check power cord connection

Replace bulb

Replace fuse

Revolve the nosepiece to click-stop position by swinging the objective correctly into the optical path

The light source of the bulb is not at the center

Adjust the position of the bulb

Dirt or dust on the eyepiece, condenser, objective or collector lens or specimen

Clean the lens with a lens cleaning paper

No slide cover attached to the slide

Slide cover is too thick or thin

Attach a 0.17mm slide cover

Use a slide cover of the appropriate thickness (0.17mm)

Turn slide over so the cover-glass faces up

Slide may be upside down

(specimen at the bottom)

Immersion oil is on a dry objective

(especially the 40X)

No immersion oil used with 100X objective

Check the objectives, clean if necessary

Use immersion oil

Air bubbles in immersion oil

Condenser aperture is closed or open too much

Condenser is positioned too low

Specimen rises from stage surface

Remove bubbles

Open or close properly

Position the condenser upward

Secure the specimen in the slide holder

Blue filter not used Use daylight blue filter

Lamp intensity is too high or low

Slippage of focus when using the coarse focusing knob Fine focus is ineffective

Tension adjustment is set too low

Tension adjustment is set too high

Adjust the light intensity by rotating the intensity control dial

Increase the tension on the focusing knobs

Loosen the tension on the focusing knobs

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DARKFIELD PROBLEMS

Problem

It’s totally dark in the viewing field

Cause Solution

The light is not on

(A191BOIL only) There is no oil in between the condenser top lens and slide

(A191BOIL only) The built-in iris diaphragm of 100X objective is not in proper position

Turn on the light

Place a drop of oil on the top lens of condenser and let it contact the underside of slide

Adjust the iris diaphragm ring on the objective

The condenser is not in the right position

Lower or raise the condenser slightly to the position that the specimen is the brightest.

(A191BOIL only) Make sure the oil contact the bottom of the slide and the top of the condenser during the adjustment.

The intensity of lamp is too low

Adjust the intensity dial to increase the brightness


The illumination is insufficient or too bright

Image of the specimen is not clear and lacking in sufficient contrast

The condenser is not centered properly


The specimen is not suitable for darkfield observation





Adjust the translational centering screws to center the condenser

Turn the iris diaphragm ring on the objective

Change to brightfield or phase contrast

Turn the iris diaphragm ring on the objective



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7.

Darkfield Condenser Installation and Operation

Instructions

7.1 Dry darkfield condenser of A191

Condenser Lock Condenser Holder

1) Mounting the dry darkfield condenser



Loosen the condenser lock thumb screw on the condenser holder and remove the brightfield condenser.



Install the dry darkfield condenser and tighten

Thumb Screw the condenser lock thumb screw on the condenser holder (see Fig. 12 ) .

2) Centering the dry darkfield condenser



Turn the 4X objective to the light path.

Centering Screws

Fig.12



Turn the condenser focus knob to lower the condenser till a dark spot showed in the viewing field as shown in Fig. 13 (a) .



Turn the condenser translational centering screws to move the dark spot to the center as shown in Fig. 13 (b) .

3) Place the slide on the stage.

4) Raise the condenser all the way to the top and lower it a little bit.

5) Following the procedures in this manual to focus and observe.

6) Move the condenser up or down slightly to get the best darkfield viewing.

Note ：



The dry darkfield condenser is used with the dry objectives only.



The dry darkfield condenser works with the 4X, 10X, 40X objectives.

 The dry darkfield condenser won ’t work with the 100X oil immersion objective.

7.2 Oil darkfield condenser of A191BOIL

1) Mounting the oil darkfield condensers



Loosen the condenser lock thumb screw on the condenser holder and remove the brightfield condenser.



Install the oil darkfield condensers and tighten the condenser lock thumb screw on the condenser holder (see Fig. 14 ) .

Condenser Lock

Thumb Screw

2) Centering the oil darkfield condensers



Turn the 40X objective to the light path.



Turn the condenser focus knob to slowly lower and raise the condenser till a dark spot showed in the viewing field as shown in Fig. 15 (a) .



Turn the condenser translational centering screws to move the dark spot to the center as shown in Fig. 15 (b) .

Condenser Holder

Centering Screws

Fig.14

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3)

4)

5)

Raise the condenser till the top lens is close to the opening of stage. Place a drop of immersion oil on the top of the lens of the condenser.

Place the slide on the stage. Raise the condenser and let the oil drop contact the bottom of the slide. If air bubbles exist in the oil, clean the oil from the condenser lens and bottom of slide with a camera cleaning paper and repeat the procedures.

Follow the procedures in this manual to bring the sample on slide

6) in focus and observe.

When using the 100X oil darkfield objective, you will need to drop the immersion oil and adjust the iris ring ( Fig. 16 ) to get proper

Iris Ring brightness and contrast of view field.

Fig.16

Note ：

 The condenser won ’t work well if no oil drop applied on the condenser.

8.

Phase Contrast Kit Installation and Operation

Instructions

8.1 Phase contrast kits of A1PHB1 or A1PHB3:

1) Mounting the phase contrast objectives a. Take off all the objectives from the nosepiece. b. Install the phase contrast objectives onto the nosepiece following the steps in

2.4

.

2) Mounting the phase contrast condenser/annular ring disk a. Rotate the nosepiece and set the 4X objective in position.

b. Turn the coarse focus knob to raise the mechanical stage to the highest position without contacting the 4X objective.

c. Turn the condenser control knob to raise the condenser to the highest position.

d. Loosen the condenser lock thumb screw, pull down the condenser and take it off.

e. Insert the condenser/annular ring disk into the condenser holder, and tighten the thumb screw.

f. Re-adjust the condenser height to its normal position.

g. Re-adjust the mechanical stage height to its normal position.

20

Note:



When raising the mechanical stage, do not make contact with the objective.

3) Turn the desired objective into light path.

4) Turn the annular ring disk to put the corresponding ring into light path, i.e. if you are using the 20X phase contrast objective, you should turn the disk at 20 as shown in Fig. 17 .

Fig.17

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5) Centering the annular ring. a. Remove one eyepiece from the microscope eyepiece tube and insert the centering telescope as shown in Fig. 18 . b. Observe from the telescope. The bright ring and dark ring should be coincided with each other as shown in Fig.19 (d) .

c. If the ring images are not clear, turn the top of telescope until both ring images are in focus.

d. If the bright ring is still obscure as in Fig.19 (b) , adjust the condenser focus knob.

e. If the two ring images are not coincided as shown

Fig.18 in Fig.19 (c) , hold the ring plate from the bottom of the annular ring disk and adjust its position until two ring images are coincided.

f. Remove the centering telescope and replace it with the eyepiece. g. Put the specimen on the stage and adjust the

(a) (b) illumination, focusing, etc following the instructions in this manual.

Note:



The phase contrast condenser will be working as

(c) (d)

Fig.19 a conventional Abbe condenser if the annular ring disk being put at B position.

8.2 Phase contrast kit of A1PHC1:

1) Mounting the phase contrast kit a. Replace the bright field objective(s) on nosepiece with the phase contrast objective(s). b. Rotate the nosepiece and set the 4X objective in position.

c. Turn the coarse focus knob to raise the mechanical stage to the highest position without contacting the 4X objective.

d. Turn the condenser control knob to raise the condenser to the highest position.

e. Loosen the condenser lock thumb screw ( Fig. 20 ), pull down the condenser and take it off.

f. Insert the condenser/annular ring disk into the condenser holder, and tighten the thumb screw ( Fig. 20 ).

g. Re-adjust the condenser height to its normal position.

h. Re-adjust the mechanical stage height to its normal position.

Condenser Lock Thumb Screw

Condenser Holder

- 17 -

Fig.20


Note: there are 2 phase contrast objectives: 10X and 40X, and there are 2 condenser annular rings on the annular ring switch: 10X and 40X. The corresponding objective and annular ring must work together, i.e. 10X phase contrast objective must work with 10X condenser annular ring, and so on.

2) Centering the condenser ring plate a. Connect the power cord to the microscope and insert the plug into a power outlet. b. Turn the desired phase contrast objective into light path. Slide the annular ring switch to the required annular ring corresponding to the phase contrast objective in the light path. c. Remove one eyepiece from the microscope eyepiece tube and insert the centering telescope. d. Observe from the telescope. The bright ring and dark ring should be coincided with each other as

(b) (b) shown in Fig. 21 (d) . e. If the ring images are not clear, turn the top of telescope until both ring images are in focus. f. If the bright ring is still obscure as in Fig. 21 (b) , adjust the condenser focusing knob. g. If the two ring images are not coincided as shown in Fig. 21 (c) , adjust the two centering screws on the phase contrast condenser.

(c) (d)

Fig. 21 h. Remove the centering telescope and replace the eyepiece.

8.3 Phase contrast kit of A1PHD:

1) Mounting the phase contrast kit a. Replace the bright field objective(s) on nosepiece with the phase contrast objective(s) b. Thread the condenser ring plate onto the condenser as shown in Fig.22

. c. Loosen the condenser lock thumb screw as shown in

Fig. 23 ; take off the original condenser from the holder. d. Insert the phase contrast condenser into the condenser holder as shown in Fig. 23 ; tighten the condenser lock thumb screw.

Condenser Lock Thumb Screw

Condenser Holder

Fig. 23

- 18 -

Fig.22


Note: there are 3 phase contrast objectives: 10X, 40X and 100X, and there are 3 condenser ring plates: 10X, 40X and 100X. The corresponding objective and ring plate must work together, i.e. 10X phase contrast objective must work with 10X condenser ring plate, and so on.

2) Centering the condenser ring plate a. Connect the power cord to the microscope and insert the plug into a power outlet. b. Turn the desired phase contrast objective into light path. c. Choose the ring plate that corresponding to the phase contrast objective in light path and screw it on the condenser. d. Replace the bright field condenser with the phase contrast condenser with ring plate on. e. Remove one eyepiece from the microscope

(a) (b) eyepiece tube and insert the centering telescope. f. Turn the light of microscope on and observe from the telescope. g. Turn the top of the telescope ( Fig.25

) until the dark ring image is in focus. If the dark ring is hard to find, put a normal white print paper on the stage and under the objective then you will see the dark ring as shown in Fig.24

(a) . h. If the bright ring is still obscure as in Fig.24

(b) , raise or lower the condenser by adjusting the condenser focusing knob (or the microscope focusing knob if necessary) till the bright ring is in focus and the dark ring is visible. i. If the two ring images are not coincided as shown in

Fig.24 (c) , adjust the two centering screws on the condenser ring plate till the two rings are coincided with each other as shown in Fig.24 (d) . j. Remove the centering telescope and replace it with the eyepiece.

(c)

Fig.24

(d)

3) Performing the phase contrast observation

After you center the ring plate, you can perform the phase contrast observation the same way as a normal bright field microscope.

Fig.25

Note: when change to another phase contrast objective and corresponding condenser ring plate, the focusing and centering of bright ring and dark ring should be repeated following the procedures from 2)-b to 2)-h .

Tips:



Make the illumination as bright as possible.



The thinner the specimen, the better the image.

- 19 -

Omax M824PLAN Series, M834 Series User Manual

User Manual

Trinocular Compound

Microscope

Model M834 Series

MicroscopeNet.com

Table of Contents

i.

Caution

ii.

Care and Maintenance

1.

Components Illustration

2.

Installation

3.

Operation

4.

Specifications

5.

Optional Parts

6.

Troubleshooting Guide

7.

Darkfield Condenser Installation and Operation

Instructions

7.1 Dry darkfield condenser of A191

7.2 Oil darkfield condenser of A191BOIL

8.

Phase Contrast Kit Installation and Operation

Instructions

8.1 Phase contrast kits of A1PHB1 or A1PHB3:

8.2 Phase contrast kit of A1PHC1:

8.3 Phase contrast kit of A1PHD:

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