BestScope BS-2080MH4 User manual

User Manual
Multi-viewing Microscope
BS-2080MH4/4A
BS-2080MH4 BS-2080MH4A
This manual is written for multi-viewing microscope BS-2080MH4 and BS-2080MH4A. For
safety, exerting best performance of the instrument, and making you familiar with the
instrument entirely, we strongly recommended that you carefully read this manual before using
the microscope.

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Contents BS-2080MH4/BS-2080MH4A
Use Notices
1、Name of Components ……………………………………………………3
2、Installation ……………………………………………………………… 4
2-1、Order of Installation ……………………………………………………………4
2-2、Installation Steps ……………………………………………………………… 5
3、Adjustment ………………………………………………………………9
4、Operation ………………………………………………………………10
4-1、Primary Set Operation …………………………………………………… 10
4-2、Adjusting Minor Set ………………………………………………………… 15
5、Technical Specifications ………………………………………………… 16
6、Trouble Shooting …………………………………………………………17

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Use Notices BS-2080MH4/BS-2080MH4A
I. Safety note
1. Carefully open the box, avoid the accessories, like lens, dropping to ground and being damaged.
2. Do keep the instrument out of direct sunlight, high temperature or humidity, dusty and easy
shaking environment. Make sure the stage is smooth, horizontal and firm enough.
3. If the bacterium solution or the water splash to the stage, objective or viewing tube, pull out the
power cord at once, and wipe up the microscope. Otherwise, the instrument will be damaged.
4. When running, the lamp house and nearby parts will be very hot. Please ensure there is enough
cooling room for them.
5. Make sure the instrument is earthed, to avoid lighting strike.
6. For safety, be sure the main switch is in “O” (off) state before replace the halogen lamp or the fuse,
then cut off the power, and do the operation after the lamp bulb and the lamp house completely
cool.
7. Check the input voltage: be sure the input voltage which signed in the back of the microscope is
consistent with the power supply voltage, or it will bring a serious damage to the instrument.
8. Use the factory supplied power cord, please.
II. Maintenance
1. All the lenses have been well checked and adjusted. It is forbidden to disassemble them yourself.
2. The nosepiece and coarse/fine focus unit have a compact and precise frame, please don’t
disassemble them as possible as you can.
3. Keep the instrument clean, wipe dust regularly, and be attention to avoid contaminating the
optical elements especially.
4. The contaminations on the prism, as finger mark and oil, could be gently wiped with a piece of soft
cloth or tissue paper, gauze which has been immersed in pure alcohol or xylene. ( note that the
alcohol and the xylene are all burned easily, do not let them near the fire, and use them in a
drafty room as possible as you can.)
5. Don’t use organic solvent to wipe the non-optical elements, when you need to clean, use the soft
detergent, please.
6. When using, if the microscope is splash by liquid, cut off the power at once, and wipe up the
moisture.
7. Do not disassemble any parts of the microscope. That will affect the function or decline the
performance of the microscope.
8. Place the instrument in a cool, dry position. After using the microscope, remember to cover it
with dust helmet. Do wait for the lamp house cooling completely before cover.

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1.Name of Components BS-2080MH4/BS-2080MH4A
Primary Trinocular
Viewing Unit
Minor Binocular
Viewing Device
Connecting
Fitting
Body Teaching Image
Rotation Mirror
Right Minor
Column support
Microscope
Body
Video Port
Video Port
Minor Binocular
Viewing Device
Primary Trinocular
Viewing Unit
Body Teaching Image
Rotation Mirror
Microscope Body
Lamp House

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2. Installation BS-2080MH4/BS-2080MH4A
2-1 Order of Installation
*The installation of BS-2080MH4A is similar to BS-2080MH4.
①Installing the Mechanical Stage
②Installing the Lamp House
③Installing the Objective
④Connecting Teaching Image Rotation Set
⑤Connecting Left\Right Minor Set
⑥Stack Mounting Teaching Image Rotation Set
⑦Stack Mounting Minor Set
⑧Installing the Trinocular Viewing Unit
⑨Installing Binocular Viewing Device
⑩Installing Eyepiece and Video Port (optional)
⑤
④
③
②
①
⑦
⑥
Objective
Video Port (optional)
Right Minor
Column Support
Trinocular Viewing Unit
Microscope Body
LED Pointer Image
Rotation Set
Lamp
House
Image Rotation
Connecting Tube (1)
Mechanical
Stage
Image Rotation
Connecting Tube (2)
⑨
⑧
⑩

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Figure 2
2
③
④
⑤
BS-2080MH4/BS-2080MH4A
2-2 Installing steps
Figure 3
2-2-1 Installation Body’s Chassis
1. Installing the Mechanical Stage
Support Device
Before installing the device, be sure to
adjust the coarse focus knob①. Make the
guide board②(see figure 1) down to the
lowest position, so you can install the
mechanical stage support device easily.
Hold on the mechanical stage support
device (figure 2), place it from the top of
the guide board (figure 1), let the device
(figure2) falling free until it reach the limit
position. Use the hexagon wrench screw
down the locking block③, make the stage
support device (figure1) and the guide
board fixed together.
The mechanical stage ⑤have been
adjusted horizontally with ④and fixed
together before leaving factory. Do not
disassembly unless necessary, that may
affect the observation precision of the
instrument.
Figure 1
②
①

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BS-2080MH4/BS-2080MH4A
2-2-2 Installing and Replacing the Lamp
(figure4, 5)
Please use the specified halogen Lamp 6V30W①.
1. Hold the bulb①after you wrap it with gauze or
other protection materials, and then deeply insert
it into the lamp holder.
2. Replacing Lamp when using or soon after
When using, or soon after it is turned off, the
lamp, the lamp house and nearby parts will be
very hot and will cause serious burns. Please turn
the main switch②on “O” (off), pull out power
plug, and make sure the bulb, the lamp room and
periphery are all cool. Then, you can do your
replacing.
Please insert the lamp gently, or it will be
damaged by excessive extrusion
Do not touch the Halogen bulb with your bare
hands. It will shorten the service life or cause it
to burst. If you leave finger marks on the
surface carelessly, clean it with a dry soft
cloth.
2-2-3 Installing the Lamp House (figure 4, 5, 6)
Keep the bolt on the lamp house
(figure 4) in line with the jack on the back
of the microscope (like the show of figure
5), then pushing the lamp holder into the
illumination kits gently until they are
against each other (figure 6).
Figure 6
Jack
Figure 5
②
Figure 4
bolt
①

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BS-2080MH4/BS-2080MH4A
2-2-4 Installing the Objective
1. Adjusting the coarse focus knob until the
support device of the mechanical stage
reach its low limit position.
2. Wresting the lowest magnification
objective onto the nosepiece from the
left or the right side (figure 7), then
push the nosepiece clockwise, then
place other objectives by the sequence
of low to high magnification ( figure 8).
Installing objective this way will make
the change of magnification to be easier
while in using.
Clean the objective regularly, the
objective of the inversed microscope
is very sensitive to dust.
When operating, use 10 ×
magnification objective to search
specimen and focus firstly, then
replace with higher magnification
objective if necessary.
When replacing the objective, slowly
turning the nosepiece until you hear
“clicked”, that means the objective enter
the required position--the light path
center.
Figure 7
Figure 8

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螺钉
BS-2080MH4/BS-2080MH4A
2-2-5 Installing Eyepiece
Pull out the lid of eyepiece which on the
eyepiece tube, insert eyepiece(figure 9)
into eyepiece tube until end. The result is
showing in the figure 12.
2-2-6 Installing Video Port (optional)
4. Insert the video port (figure 10) into the
trinocular unit (figure 11), then screw
down the bolt to fix it, the result is
showing in figure 12.
Figure 12
Figure 10
Figure 9
9
Figure 11
Eyepiece
bolt
Bolt

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3.Adjustment BS-2080MH4/BS-2080MH4A
Pointer Knob
Swing out Condenser (with
Aperture Diaphragm)
Video Port (optional)
Light Path Selector Lever
Lateral Adjustment Knob
Pointer rocker
Portrait Adjustment knob
Right Coarse Focus Knob
Main Switch
Right Coarse Focus Knob
Brightness
Adjustment Knob
Figure 13
Clocking Set
Left Coarse
Focus Knob
Left Fine Focus
Knob
Condenser Focus
Knob
Field Diaphragm
Figure 14

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4. Operation BS-2080MH4/BS-2080MH4A
4-1 Primary Set Operation
4-1-1 Turning on the Lamp (Figure
15)
Connect the power, turn on the main
switch to “－”(on).
4-1-2 Adjust Brightness (Figure 16)
Turning the brightness adjustment knob
clockwise, the voltage raise, and the
brightness strengthen; turning with the
anti-direction, the voltage decline, and
the brightness weaken.
 Using the lamp in a low voltage
condition, will prolong the use life.
4-1-3 Adjust the Tension Adjustment
Collar (Figure 17)
 The tightness of the tension adjustment
collar has adjusted before leaving
factory, if finding it’s loosing (the
mechanical stage drop itself because of
dead weight), please turning the tension
adjustment collar until the tightness is in
order.
Spanner
Figure 15
Main switch
Figure 16
Brightness
adjustment
knob
Figure 17
Tension adjustment collar

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BS-2080MH4/BS-2080MH4A
4-1-4 Placing Specimen(Figure 18)
Place the slide on the mechanical stage.
Use the stage clips to clamp the slide
gently.
Turn the portrait and lateral adjustment
knob of the mechanical ruler, move the
specimen onto the required position.
Be careful when changing the
objective. If you finish the observation
with the short working distance
objective, and want to change another
one, be careful of not letting the
objective touch the specimen.
4-1-5 Adjusting the Interpupillary
Distance (Figure 19)
The interpupillary distance range: 48mm～
75mm. When observing with two eyes,
hold on the left and right prism holder,
turn around the axis, adjusting the
interpupillary distance until the left and
right fields of view coincide completely.
4-1-6 Adjusting the Diopter (Figure
20)
The right ocular tube is fixed. So by
turning the left diopter ring after the right
ocular focus on the specimen, the operator
who’s left and right eye has different
eyesight can obtain a comfortable focus
position with both eyes.
Figure 18
Figure 19
Figure 20
Diopter ring

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BS-2080MH4/BS-2080MH4A
4-1-7 Focus (figure21, figure22)
1. When not using the video set
Push in the light path selector lever (figure
26) completely, then observe with both
eyes. Use the 10×objective focus, to avoid
the objective touch with the specimen, you
should raise the mechanical stage at first, let
the specimen close to the objective, then
slowly separating them to focus.
The operator can converse turn the coarse
focus knob to get the specimen down ,and
search images in the 10×ocular
simultaneously, then use the fine knob to
focus. At this moment, you can replace
other magnification objectives safely, and
focus without the risk of destroying the
specimen.
2. When using the video set
Pull out the light path selector lever (see
figure25), observe with both eyes, when the
image is sharp, you can see the pictures
directly on the video screen which
connected by the microphotograph system
through the video mount.
If you need to fix the stage on a vertical
position to make the observation become
more convenience, take use of the locking
set.
Figure 21
Figure 22
①

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BS-2080MH4/BS-2080MH4A
4-1-8 Adjusting the Swing out
Condenser (Figure 23)
The center of the condenser and the light
axes of the objective are coaxial. It has been
adjusted before leaving factory, so the user
needn’t to adjust them by self.
The highest position of the condenser has
been adjusted too. It also needn’t any user’s
operation.
Turn the condenser focus knob to shift the
condenser. It needs to raise the condenser
when using the high magnification
objective, and to decline when using the low
magnification one.
1. Using the Swing out Condenser
When using the low magnification objective,
turn out the condenser, and let it away from
the light path. While using the high
magnification objective, turn it into the light
path.
2. Adjusting the Aperture Diaphragm
The aperture diaphragm is designed for the
adjustment of the numerical aperture , not
for the brightness. Generally, reducing the
diaphragm opening to 70- 80% of the N.A.
value of the respective objective will
provide an image of acceptable quality. If
you want to observe the image of the
aperture diaphragm, remove one eyepiece
and look through the tube. You will see a
dark circle encroaching on the bottom of the
tube.
Figure 23
③
②

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BS-2080MH4/BS-2080MH4A
4-1-9 Adjusting the Field Diaphragm
(Figure 24)
The control for the field diaphragm is a ring
used for adjusting the area of field diaphragm.
When using, turn the ring①to reduce the field
diaphragm, look into the field, if the diaphragm
image is faintness, do the follow steps: first,
turn the condenser focus knob, shift the
condenser holder to the position where the
observed image of the field of view is sharp;
then open the field diaphragm, let the image full
of the field of view, reduce the mixed light,
improving the quality of the image.
4-1-10 Adjusting Pointer (figure 25)
When the image is sharp by observe with both
eyes, the image of pointer will on the field of
view simultaneity. If not, you can turn the
pointer rocker②in four direction (up, down, left,
right) gently, make the pointer on the field of
view. If the image of pointer is unclear, you can
turn the pointer knob③to adjust the lightness
until turn up a green sharp image.
★Please gently when turn the pointer rocker or
spin the pointer knob, to protect inner circuit
of the pointer knob.
4-1-11 Switching the Light Path Selection
(Figure 26)
When the light path selector lever on the
trinocular viewing set is pushed in, all the light
enters the binocular tube, so you can do the
binocular observation. While the lever pull
out, some part of light enters the binocular
tube, the left go up, enter the video tube, so
you can observe through the video equipment.
Figure 26
Light path
selector lever
Figure 24
①
Figure 25
②
③

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BS-2080MH4/BS-2080MH4A
4-2 Adjusting Minor Set
4-2-1 Adjusting Interpupillary
Distance (figure27)
After adjusting the Primary set, observing the
minor set, it will be a sharp image
simultaneously. When observing with two
eyes, hold on the left/right prism bolder, turn
around the axis, adjusting the interpupillar
distance until the left/right fields of view
coincide completely.
4-2-2 Adjusting Diopter(figure28)
By turning the left diopter ring after the right
ocular focus on the specimen, the operator
whose left and right eye has different eyesight
can obtain a comfortable focus.
4-2-3 Adjusting Pointer (figure25)
It will be a clear green pointer image after
adjusting the Primary set, if the pointer not
clear or invisible, you can turn the pointer
knob moderately or turn the pointer rocker in
four direction (up, down, left, right) gently to
adjust lightness and height of the pointer,
which will see the clear pointer image
simultaneous on the field of view of primary
set and minor set.
Figure 27
Interpupillary
distance
indicator
Figure 28
Diopter ring

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5．Technical Specifications BS-2080MH4/BS-2080MH4A
I. Main specifications
Optical System
Infinite Optical System
Compensation free trinocular head, inclined at 30°, Interpupillary distance: 48-75mm
Viewing Head
Compensation free binocular Head, Inclined at 30°, Interpupillary distance:48-75mm
Eyepiece (Ocular)
Exceed wide field ocular EW10X/22, tubeΦ30 matched
Nosepiece
Backward Quintuple Nosepiece
Objective
Infinite plan Achromatic: 4×, 10×, 40×, 100×, 20×（optional）
Focus System
Coaxial Coarse and Fine Focusing System, Sensitivity and Graduation of Fine Focus:
0.001mm
Stage
Double layer mechanical stage, area: 185×142mm, movement range: 75×55mm
Koehler Illumination
Exposed illumination system, Aspheric collector, halogen lamp 6V30W
Condenser
Swing out condenser NA0.9/0.25
II. Configuration Table
Viewing Head
Compensation Free Trinocular Head
●
Eyepiece
Extra Wide Field Eyepiece
●
Infinite plan objective: 4×, 10×, 40×, 100×
●
Objective
Infinite Plan Objective: 20×
○
Condenser
Swing out Condenser NA0.9/0.25
●
Video Accessories
○
C Mount 1×
○
Video Mount
C Mount 0.5×
○
Polarization Device
○
Turret Phase Contrast
Device
○
Dark Field Device
○
Fluorescent
Attachment
○
Temperature Control
Device
○
Note: ●Standard outfit，○Optional
III. Objective Specifications
Magnification
Numerical
Aperture(N.A)
Working
Distance(mm)
Thickness of
Cover Slip
Conjugate
Distance(mm)
Magnification Sign
(Color loop)
4X
0.10
25.42
0.17
∞
Red
10X
0.25
11
0.17
∞
Yellow
40X
0.65
0.75
0.17
∞
Baby Blue
100X
1.25
0.21
0.17
∞
Black and White
Circle

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6. Trouble Shooting BS-2080MH4/BS-2080MH4A
PROBLEMS
REASON FOR PROBLEMS
SOLUTION
I. Optical Part:
The nosepiece is not in the located
position( The objective is not in the
center of the light path )
Adjust it into the located
position( turning the objective to let
it in the center of the light path
correctly)
The filament shadow not in center
Adjust it to center
1. The edge of the
field of view has
shadow or the
brightness is
asymmetry
The surface of the lens has contaminant
(condenser, objective, eyepiece,
Collector lens)
Clean the lens
The surface of the lens has contaminant
(condenser, objective, eyepiece,
Collector lens)
Clean the lens
There are stains on the slide
Clean the lens
2. Find dust and stain
in the field of view
The position of condenser is too low
Loosen the bolt of the condenser,
adjust its position and tighten it
again
No cover glass on the specimen
Add cover glass
The cover glass is too thick or too thin
Use normal thickness cover
glass(0.17mm)
The specimen is on the reverse side
Turn it around
Oil the dry objective(especially easy to
happen on 40X)
Clean the objective
The surface of the lens has contaminant
(condenser, objective, eyepiece,
Collector lens)
Clean the lens
No oil with oil objective
Use oil
There are air bubbles in the oil
Eliminate the bubbles
Use the unspecified oil
Use the specified oil
The opening of Aperture diaphragm is
too large
turn it down to the proper size
There are stains on the incidence lens
of the binocular head
Clean the lens
The opening of Aperture diaphragm is
too small
Opening it to the proper size
3. Bad image quality
(low-resolution, bad
Contrast)
The position of condenser is too low
Adjust its position

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The condenser is not in the center of
the field or the condenser incline
Reset the condenser and adjust the
Central bolt of the condenser carefully
The nosepiece is not in the located
position
Rotate the nosepiece to the required
position
4. The image one
side is clear and the
other side is faint
The specimen is in the floating state
Fix it firmly
The specimen is floating on the stage
Fix it firmly
5. The image move
when focus it
The nosepiece is not in the located
position
Rotate the nosepiece to the required
position
6. The image seems
yellow slightly
Not use the blue filter
use the blue filter
The opening of Aperture diaphragm
is too small
Adjust it again
The position of condenser is too low
Adjust its position
7. The height of the
brightness is not
enough
The surface of the lens has
contaminant (condenser, objective,
eyepiece, Collector lens)
Clean the lens

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II. Mechanical Part:
1. The image can’t focus
using high-power objective
The slide is on the reverse side
The cover glass is too thick
Reverse the slide
Use normal thickness cover
glass(0.17mm)
2. The objective touch the
cover glass when it change
from low power to
high-power
The slide is on the reverse side
The cover glass is too thick
Reverse the slide
use normal thickness cover
glass(0.17mm)
3. The specimen moving not
fluently
The slide holder is not fixed
effectively
Fix it firmly
4. The left and right fields of
view is not coincided .
The interpupillary distance is not
correct
Adjust it correctly
The diopter is not right
Adjust the diopter according your
sight
5. The eyes are
uncomfortable
The brightness of illumination is
not properly
Adjust the bulb voltage
III. Electric Part:
No power supply
Check the power cord, and connect
them exactly
The installation of the bulb is
wrong
Install the bulb correctly
1. The lamp can’t light
The bulb burn out
Change a new bulb
2. The bulb burn out
suddenly
Not use the specified lamp
The voltage is too high
Use the required lamp, if the
situation has not change after
replacing the bulb, please connect
with maintenance department
3. The height of the
brightness is not enough
Not use a appointed lamp
The voltage is too low
Use a appointed lamp
Add the voltage
The bulb is going to spoil
Change the bulb
4. The light glimpse
The bulb is not plug in the socket
correctly
Check it and plug in the socket
firmly