Omax MD827S30 series User manual

User Manual
Digital Binocular
Compound Microscope
Model MD827S30 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. Open the carton carefully with a knife or paper cutter. Find the “UP” sign and place
the Styrofoam container on the side that makes the arrow upward. If the “UP”sign is
missing, please open the Styrofoam container gently to prevent any accessory, 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. Important: the lamp, lamp housing and adjacent parts will become very hot. Do not
touch these parts until they have completely cooled. Never attempt to handle a hot
halogen bulb.
6. All electrical connectors (power cord) should be inserted into an electrical surge
suppressor to prevent damage due to voltage fluctuations.
7. Confirm that the input voltage 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.
8. Note: please read the instruction of the operation of camera in manual 3.10 below
and the CD in the package before you start to use it.

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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 camera
cleaning kit if the immersion oil is on the dry objectives lens. Clean the 100X
objective lens first using the camera cleaning kit 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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1Components Illustration
1
Eyepiece
10
Viewing Head w/ Camera
19
Power Switch
2
Diopter Ring
11
Head Thumb Lock Screw
20
Condenser Lock Thumb Knob
3
Eyepiece Tube
12
Microscope Body
21
Condenser Focus Knob
4
Nosepiece
13
Focus Tension Ring
22
Focus Stop Lever
5
Objective
14
Coarse Focus Knob
23
Abbe Condenser
6
Slide Holder
15
Fine Focus Knob
24
Color Filter Holder
7
Mechanical Stage
16
X-Y Stage Moving Knobs
25
Iris Diaphragm Lever
8
Light Collector
17
USB Cable
9
Microscope Base
18
Brightness Intensity Dial
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
22
23
19
24
25
21

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2Installation
2.1 Installation of the binocular viewing head
1) Loosen the head thumb lock screw on the top of the microscope body and remove
the plastic cover on the top
2) Remove the cap on the dovetail of the binocular viewing head
3) Seat the dovetail completely of the viewing head into the socket on the top of the
microscope body and tighten the head thumb lock screw.
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 eyepieces
1) Remove the protective caps from the eyepiece tubes.
2) Insert the eyepieces into the eyepiece tubes.
2.3 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. 1.
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.
2.4 Installation of the glass Filter
1) Swing out the color filter holder under the condenser.
2) Place the filter into the holder as shown in Fig. 2, swing the holder in.
Fig.1

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2.5 Installing (or changing) the halogen bulb
1) Turn off the power switch and disconnect the power cord.
2) Allow some time to cool down the lamp.
3) Turn over the microscope on its side; find the bulb compartment at the bottom.
4) Open the cover of the bulb compartment by loosening the thumb screw.
5) Take out the dead halogen bulb and insert the new halogen bulb.
Be sure the pins on the bulb are completely inserted into the lamp socket. You may
also loosen the two screws on the cover to adjust the position of the bulb to get
centered and even brightness. See Fig. 3.
6) Screw the cover on.
Caution:
Before you turn over the microscope, be sure to take the eyepieces off and be certain
that the head is securely locked by the thumb screw.
2.6 Replacing the fuse
1) Turn off the power switch and disconnect the power cord.
2) Turn over the microscope on its side; find the fuse holder at the bottom of the base.
3) Turn the fuse holder counter-clockwise to take it off, replace the fuse, and then turn it
on clockwise. See Fig. 4.
Halogen Bulb
Screws
Thumb Screw
Fig.2
Fig.3
Color Filter
Color Filter Holder

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Fuse
Fuse Holder
Caution:
Before you turn over the microscope, be sure to take the eyepieces off and be certain
that the head is securely locked by the thumb screw.
2.7 Installing the mirror (optional, may not included in your package)
1) Turn off the power switch and disconnect the power cord.
2) Screw off the light collector on the microscope base.
3) Screw the black disc onto the base and then insert the mirror into the hole at the
center of the black disc. See Fig. 5. You may try to get reflected ambient light on
either side of the mirror with different angles for best result.
Note:
The mirror is only used when there is a power failure or you are in the field and no
power is available.
2.8 Installation of the darkfield condensers (optional, may not included in your package)
Please see section 7 (Darkfield Condenser Installation and Operation Instructions)
2.9 Installation of the phase contrast kits (optional, may not included in your package)
Please see section 8 (Phase Contrast Kit Installation and Operation Instructions)
Fig.4
Fig.5
Light Collector
Mirror

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3Operation
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 and Y stage moving knobs to position the specimen in the center of
viewing field.
Caution:
Be sure not to allow an objective to touch a specimen slide when changing objectives.
3.3 Adjusting interpupillary distance
While observing with both eyes, hold the left and right eyepiece tubes then slide the
tubes in and out. The interpupillary distance is correct when the left and right fields of
view converge completely into one image.
3.4 Adjusting eyepiece diopter
1) Rotate the 10x objective into position.
2) Rotate the diopter rings on the eyepiece tubes until
its numerical value is the same as your interpupillary
distance, for example, 70 in the figure (See Fig. 6).
3) Close your left eye and bring the specimen into
focus following the focusing procedures in 3.5.
4) Close your right eye and bring the same specimen
into clear sharp focus by adjusting the diopter ring
on left eyepiece tube only. Do not use focus knobs
at this step.
5) Since both sides are adjustable, you may also do
the above in the opposite way, in other words, left
eye first and right eye second.
3.5 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 3.3and 3.4.
5) You may now switch to another magnification objective.
70
Fig.6

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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
focus stop lever (Fig. 7). Give the stage a tiny extra
moving space to ensure the objective can be focused
every time.
3.6 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).
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 camera cleaning kit to clean the 100X objective
lens gently and the specimen in time.
5) If it is hard to clean, you need a little bit alcohol to clean the 100X objective lens and the
specimen.
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 camera cleaning kit 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.
3.7 Adjusting condenser
1) Turn the condenser focus knob to raise or lower the condenser.
2) Raise the condenser when using high power objectives and lower it when using low
power objectives.
Note:
The centering of the condenser and the light axis of the objective are factory
adjusted. Do not attempt to re-adjust.
The highest position of the condenser has been factory adjusted. Do not attempt to
re-adjust.
Focus Stop Lever
Fig.7
Fig.8
(b)
(a)

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3.8 Adjusting iris aperture 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
tension adjustment ring (Fig. 10) situated between the
coarse focus knob and microscope body on the power
switch side until the tension is in maintained.
3.10 Photo/video observing, capturing and recording
1) Bring the microscope into focus by following the
procedures in 3.5.
2) Insert the USB cable into the USB port (Fig. 11) on
the back of viewing head, and the other end to the computer.
3) Turn on the computer; install the camera following the
manual in the mini CD.
4) Open image observing software to examine (more
details see camera’s manual).
5) Capture images with manual white balance for image
size of 1280x1024 and 2048x1536 or 1024x768
resolution when using auto white balance.
6) You also can record live videos through the software.
Note:
Please refer to the manual in the camera’s CD for the
details of installation and operation of the camera.
Do not capturing images of 1280x1024 or 2048x1536 resolution in auto white balance
mode. The captured images may have problems with color rendering at this mode.
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 kits observation (optional, may not included in your package)
Please see section 8 (Phase Contrast Kit Installation and Operation Instructions)
Iris Diaphragm Lever
Fig.9
Focus Tension Ring
Fig.10
USB Port
Fig.11

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4Specifications
Model
MD827S30 series
Total Magnification
40X, 80X, 100X, 200X, 400X, 800X, 1000X, 2000X
Viewing Head
Binocular, 45ºinclined, 360ºswiveling w/ built-in camera
Interpupillary Distance
Sliding adjustment, 2-3/16” ~ 2-15/16” (55mm ~ 75mm)
Diopter Adjustment
On both eyepiece tubes
Eyepieces
1 pair of WF10X/18
1 pair of WF20X
Objective Tube Length
160mm
Nosepiece
Revolving quadruple
Objectives
Achromatic DIN 4X, 10X, 40X(spring), 100X(spring, oil)
Condenser
Abbe, NA=1.25, w/ iris diaphragm and filter holder
Rack and pinion adjustment
Focus Mechanism
Coaxial coarse and fine focusing knobs on both sides w/
focus stop
Minimum fine focusing adjustment at 0.002mm, range 28mm
Mechanical Stage
Double layer, Dimension: 5-1/2” x 5-1/2” (140mmx140mm)
Translational range: 3” x 2” (75mm X 50mm)
Camera
Built-in USB2.0 2048 x 1536 pixel (3.0MP)
Driver and Software included in the CD
Compatible with Windows 2000, XP, Vista and Windows7
(32/64-bit)
Darkfield Condensers (optional)
Refer to the Darkfield Condensers specifications
Phase Contrast Kits (optional)
Refer to the Phase Contrast kits specifications
Carrying Case (optional)
Net weight: 10 lbs 8 oz (4.75 kg)
Size: 16-1/2" x 12-1/2"x 13-3/8" (42cm x 32cm x 34cm)
Illumination
Transmitted: 6V/20W, Halogen, Variable intensity
Power Supply
AC 100V-240V, 50/60HZ (US and Canada plug)
Dimension
7-7/8” x 10-1/4” x 15-3/8” (20cm x 26cm x 39 cm)
Net weight
12 lbs (5.45 kg)

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5Optional Parts
(The optional parts may be included in some models or sold separately.)
1) Darkfield Condensers
Model
Darkfield
Condenser
Numerical
Aperture
Objective
Mounting
Size(diameter)
A191
Dry
0.7-0.9
-
37mm
A191BOIL
Oil
1.36-1.25
Plan 100X/1.25 oil-0.5
160/0.17(spring), w/ iris
diaphragm
37mm
2) Carrying Case
Model
Dimension
Net Weight
A183V
10-1/2"x7"x15-1/4"
(26.7cmx17.8cmx38.8cm)
1.5 lb (0.7 kg)
A189A
16-1/2"x12-1/2"x13-3/8"
(42cm x32cm x 34cm)
10 lb 8 oz (4.75 kg)

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3) Phase Contrast Kits
Model
Phase Contrast Objective
Condenser
Annular Ring Plates
Centering
Telescope
A1PHB1
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
NA 1.25
five positions:
10 for 10X phase contrast
objective
20 for 20X phase contrast
objective
40 for 40X phase contrast
objective
100 for 100X phase contrast
objective
B for bright field observation,
with iris diaphragm
focusing
adjustable
A1PHB3
Achromatic 10X with built-in
phase plate
Achromatic 20X with built-in
phase plate
Achromatic 40X with built-in
phase plate, spring
Achromatic 100X with built-in
phase plate, spring, oil
five positions:
10 for 10X phase contrast
objective
20 for 20X phase contrast
objective
40 for 40X phase contrast
objective
100 for 100X phase contrast
objective
B for bright field observation,
with iris diaphragm
A1PHC2
Achromatic plan 10X with
built-in phase
Achromatic plan 40X with
built-in phase plate, spring
four positions:
10/20 for 10X/20X phase
contrast objective
40 for 40X phase contrast
objective
DF for darkfield observation
BF for brightfield
observation, with iris
diaphragm
A1PHD
Achromatic 10X with built-in
phase plate
Achromatic 40X with built-in
phase plate, spring
Achromatic 100X with built-in
phase plate, spring, oil
10 for 10X phase contrast
objective
40 for 40X phase contrast
objective
100 for 100x phase contrast
objective

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6Troubleshooting Guide
GENERAL PROBLEMS
Problem
Cause
Solution
Lamp does not light
when switched on
No electrical power
Check power cord connection
Lamp bulb burnt out
Replace bulb
Fuse blown out
Replace fuse
Darkness at the
periphery or uneven
brightness in the
field of view
Revolving nosepiece not in click stop
position
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
view
Dirt or dust on the lens eyepiece,
condenser, objective, collector lens
or specimen
Clean the lens with a camera cleaning
kit
Poor image quality
or not able to get
focused image
No slide cover attached to the slide
Attach a 0.17mm slide cover
Slide cover is too thick or thin
Use a slide cover of the appropriate
thickness (0.17mm)
Slide may be upside down
(specimen at the bottom)
Turn slide over so the cover-glass
faces up
Diopter adjustment is not set
properly
Readjust the diopter settings
Immersion oil is on a dry objective
(especially the 40X)
Check the objectives, clean if
necessary
No immersion oil used with 100X
objective
Use immersion oil
Air bubbles in immersion oil
Remove bubbles
Condenser aperture is closed or
open too much
Open or close properly
Condenser is positioned too low
Position the condenser upward
Specimen rises from stage surface
Secure the specimen in the slide
holder
Blue filter not used
Use daylight blue filter
Lamp intensity is too high or low
Adjust the light intensity by rotating the
intensity control dial
Slippage of focus
when using the
coarse focusing
knob Fine focus is
ineffective
Tension adjustment is set too low
Increase the tension on the focusing
knobs
Tension adjustment is set too high
Loosen the tension on the focusing
knobs

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DARKFIELD PROBLEMS
Problem
Cause
Solution
It’s totally dark in
the viewing field
The light is not on
Turn on the light
(A191BOIL only) There is no oil in
between the condenser top lens
and slide
Place a drop of oil on the top lens of
condenser and let it contact the underside
of slide
(A191BOIL only) The built-in iris
diaphragm of 100X objective is not
in proper position
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 illumination is
insufficient or too
bright
The intensity of lamp is too low
Adjust the intensity dial to increase the
brightness
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 condenser is not centered
properly
Adjust the translational centering screws to
center the condenser
(A191BOIL only) The built-in iris
diaphragm of 100X objective is not
in proper position
Turn the iris diaphragm ring on the
objective
Image of the
specimen is not
clear and lacking in
sufficient contrast
The specimen is not suitable for
darkfield observation
Change to brightfield or phase contrast
(A191BOIL only) The built-in iris
diaphragm of 100X objective is not
in proper position
Turn 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.

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7Darkfield Condenser Installation and Operation
Instructions
7.1 Dry darkfield condenser of A191
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
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.
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).
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).
(a) (b)
(a) (b)
Fig.12
Fig.13
Fig.14
Fig.15
Condenser Lock
Thumb Screw
Centering Screws
Condenser Holder
Condenser Lock
Thumb Screw
Centering Screws
Condenser Holder

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3) 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.
4) 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.
5) Follow the procedures in this manual to bring the sample on slide in
focus and observe.
6) 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
brightness and contrast of view field.
Note：
The condenser won’t work well if no oil drop applied on the condenser.
8Phase 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 2.3.
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 light collector and take it off.
e. Loosen the condenser lock thumb screw, pull down the condenser and take it off.
f. Insert the condenser/annular ring disk into the condenser holder, and tighten the
thumb screw.
g. Insert the light collector back onto the base and turn until it’s tightened.
h. Re-adjust the condenser height to its normal position.
i. Re-adjust the mechanical stage height to its
normal position.
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 40x
phase contrast objective, you should turn the disk
at 40 as shown in Fig. 17.
Fig.16
Iris Ring
20
Fig.17

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(a) (b)
(c) (d)
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 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
illumination, focusing, etc following the
instructions in this manual.
Note:
The phase contrast condenser will be working as
a conventional Abbe condenser if the annular
ring disk being put at B position.
6) Performing the phase contrast observation.
After centering the condenser ring plate, perform the
phase contrast observation the same way as a normal bright field microscope.
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 5)-b to 5)-f.
8.2 Phase contrast kit of A1PHC2:
1) Mounting the phase contrast kit
a. Replace the brightfield 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.
Fig.19
Fig.18

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Condenser Holder
Condenser Lock Thumb Screw
Note:
There are 2 phase contrast objectives: 10X and 40X, and there are 2 condenser
annular rings on the sliding selector: 10/20 and 40. The corresponding objective,
annular ring and iris diagram must work together, i.e., 40Xphase contrast
objective must work with 40 condenser annular ring and iris diagram 40 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 sliding selector to the
corresponding annular ring and turn iris diagram
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
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.
h. Remove the centering telescope and replace the eyepiece.
3) Performing the phase contrast observation
Perform the phase contrast observation the same way as a normal brightfield
microscope.
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.
4) Performing the darkfield observation
a. Slide the sliding selector to the darkfield position, the condenser will work as a
darkfield condenser.
Fig.20
(a) (b)
(c) (d)
Fig. 21