BestScope BS-2030B User manual

Biological Microscope
Model Number:BS-2030M/B/T
User Manual
BS-2030M BS-2030B BS-2030T
This instruction manual is for BS-2030M/B/ T biological microscope. To ensure safety and obtain optimum
performance and familiarize yourself fully with the use of this microscope. We recommend that you read
the manual thoroughly before operating the microscope, Attain this manual instruction in an easily
accessible place near the microscope for the further reference.

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CONTENTS
User Notice................................................................. 2
1. Components............................................................. 4
2. Assembly................................................................. 5
2.1 Assembly Diagram................................................. 5
2.2 Assembly Steps .................................................... 6
3．Adjustment & Operation ........................................... 10
3.1 Adjustment Sets ................................................. 10
3.2 Operation......................................................... 11
4. Specification Table .................................................... 14
5．Outfit ................................................................. 15
6．Troubleshooting Guide.............................................. 16

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User Notice
I. Safety Notes
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. When moving the instrument, please use two hands to grip with the two sides of the microscope
body.
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 replacing 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 down. (Specified: Halogen Lamp6V/20W)
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 possibly as you can.
3. The nosepiece and coarse/fine focus unit have a compact and precise frame; please don’t
disassemble them as possibly as you can.
4. Keep the instrument clean, wipe dust regularly, and be attention to avoid contaminating the
optical elements especially.
5. 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 aether. (Note that
the alcohol and ether are highly flammable, do keep them away from the fire or potential
sources of electrical sparks, and use them in a drafty room as possible as you can.)
6. Do not attempt to use organic solvents to clean the microscope components other than the
glass components. To clean them, use a lint-free, soft cloth slightly moistened with a diluted

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neutral detergent.
7. When using, if the microscope is splashed by liquid, cut off the power at once, and wipe up the
moisture.
8. Do not disassemble any parts of the microscope, which will affect the function or decline the
performance of the microscope.
9. Place the instrument in a cool, dry position. When not using the microscope, keep it covered
with a dust cover. Make sure the lamp socket is cool before covering the microscope.

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1. Components
BS-2030B Biological Microscope
Binocular viewing head
Eyepiece
Slide clip
Condenser
Objectives
Nosepiece
Stage
Collector
Main body

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2.Assembly
2.1 Assembly Diagram
The following figure shows the installation sequence of the components. The number in the figure
shows the assembly steps.
Before installing, be sure every component is clean, do not score any parts or glass surface.
Keep well with hexagon wrench provided. When replacing the components, you will need it again.
①
②
③
④
Objectives
Power cord
Main body
10X Eyepieces
Binocular Viewing Head

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2.2 Assembly Steps
Fig.1
Fig.2
2.2.1 Installing Binocular viewing head
(Fig.1, 2)
Insert the digital viewing head into the
microscope head, turn into the right position,
then screw down the bolt①to fix it.
2.2.2 Installing the eyepieces (Fig.3,
Fig.4)
Insert the eyepieces into the eyepiece tube
until they are against each other as shown in
Fig.4.
Fig.4
①
Fig.3
NOTE:
Operation Conditions:
1．Temperature: 0℃ ～ 40℃,Maximum
Relative Humidity: 85%.
2．High Temperature: High Temperature
and humidity will result in a mildewing,
dew and even ruinous instrument.
3．Avoid placing the instrument in a dusty
environment. When ending your
microscope operation, please cover it with
the dust cap.
4．Lay the microscope in a plan and stable
position, please.

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Fig.6
2.2.3 Installing objectives (Fig.5& 6)
1. Adjusting the coarse focus knob until the
support device of the mechanical stage
reaches its low limit position.
2. Screw the lowest magnification objective
into the nosepiece from the left or the right
side, then revolve the nosepiece clockwise
and mount other objectives by the sequence
of low to high magnification
Installing objective this way will make the
change of magnification to be easier during
using.
Clean the objective regularly, for lens is
susceptible to dust.
When operating, use 10×magnification
objective to search and focus specimen
firstly, then replace with higher
magnification objective if necessary.
When replacing the objective, slowly turn
the nosepiece until you hear “clicked”,
which means the objective is in the
required position--the light path center.
2.2.4 Installing the color filters (Fig.7)
1. Turn the condenser bracket①out at the
direction of arrow in Fig.7
2．Put the required filters②into the holder on
the bracket, and then turn the bracket back to
the right position.
★Baby blue and green filters are available in
standard outfit.
Fig.5
Fig.7
①
②

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2.2.5 Connecting the power cord
(Fig.8, 9,10)
★The cable and cords are vulnerable
when bent or twisted, never subject the
power cord to excessive force.
1. Turn the main switch①to “O” (off) state
before connecting the power cord.
2. Insert the power plugs②into the power
jack③of the microscope; make sure the
connection is well.
3. Plug the power cord ④into the power
supply receptacle safely. Make sure the
connection is well.
★Do use the supplied power cord all the
time. If lost or damaged, select the same
standard cord, please.
2.2.6 Replacing the Fuse (Fig.8, 9, 10)
Do remember to set the main switch①to
the state of “O” (OFF) and unplug the power
cord ②before replacing the fuse. Rotate the fuse
kits⑤out of the holder, replace with a new fuse,
then rotate it back to the holder again.
★The rating of the new fuse should be the
same as the old one.
Fig.8
①
Fig.10
④
⑤
Fig.9
③
②

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.
2.2.7 Installing and replacing the lamp
(Fig.11, 12)
Please use the specified halogen Lamp
6V20W. Replace the lamp as follows if
necessary.
1. Please set the main switch to “O” (off) state
before replacing, and make sure the bulb, the
lamp room and periphery are all cool enough
to carry no burn. Then, you can do your
replacing.
2. Loose the bolt①and open the window②on
the bottom of the microscope base with
“一”type screwdriver.
3. Pull out the old bulb③,hold the new bulb
after you wrap it with gauze or other
protection materials and insert its pin as
deeply as possible into the jack in the lamp
holder.
4. Close the window and tighten the bolt①.
Please insert the bulb gently, or it will be
damaged by excessive extrusion.
Do not touch the halogen bulb with
bare hands. It will shorten the service
life or cause it to burst. If you leave
fingerprints on the surface carelessly,
clean it with a piece of dry soft cloth.
Fig.11
②
①
③
Fig.12

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3．Adjustment & Operation
3.1 Adjustment Sets (Fig.14, Fig.15)
Main Switch
Brightness Adjustment Knob
Fig.15
Right Coarse Focus Knob
Right Fine Focus Knob
Tension Adjustment Collar
Fig.14
CondenserAdjustment Knob
LongitudinalAdjustment Knob
TransversalAdjustment Knob
Locking Set
Left Fine Focus Knob
Knob
Left Coarse Focus Knob
Aperture Diaphragm Adjustment Lever
Diopter Ring
Interpupillary Distance Indicator

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3.2 Operation
Spanner
3.2.1Adjusting the brightness (Fig.16)
1. Connect the power, turn on the main
switch①(shown in the figure)which on the bottom
side of the base to “－”(on).
2. Turning the brightness adjustment knob
②clockwise, the voltage decline, and the brightness
weaken; Whereas turning at the opposite direction,
the voltage raise, and the brightness strengthen.
Using the microscope at a lower voltage can
prolong the service life of the bulb.
3.2.2 Placing the specimen (Fig.17)
1. Place the specimen③on the center of the stage,
and then nip it with the specimen holder④.
2. Turn the transversal and longitudinal adjustment
knobs which on the mechanical ruler to 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.
3.3.3 Focusing the specimen (Fig.18, 19)
1. Focus the specimen with 10X objective. To avoid
the objective touching the specimen during focusing,
you should raise the mechanical stage to let the
specimen close to the objective at first, then slowly
separate them to bring the specimen to focus.
2. Turn the coarse focus knob ①conversely to lower the
specimen and search images in the 10×ocular
simultaneously, and then use the fine knob②to make
focus. After that, you can replace with other
magnification objectives safely, and focus without the
risk of damaging the specimen.
3. When the specimen is focused, tighten the locking set
(in Fig.14) to give a height limit to the stage. In this
way, the stage only can lower, avoiding false
operation and damage to the specimen.
Fig.19
①
②
Fig.16
Fig.17
Fig.18
①
③
②
③
⑤
④

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●The tight tension of the coarse focus knob has
already been adjusted before leaving factory. If
loosen (e.g. the stage slip down by its weight),
please screw the intention adjustment collar③to
the right position by the supplied spanner.
3.3.4 CondenserAdjustment (Fig.20)
Turn the condenser focus knob to move the
condenser up and down. Raise the condenser when
using the high magnification objective, and descend
it when using the low magnification one.
The condenser and the objective are coaxial. It has
been adjusted before leaving factory, so the user
needn’t to adjust them by self (the distance
between the top of the condenser and the stage
should be in the range of 0.03mm~0.4mm.)
The highest position of the condenser has been
adjusted too. It also needn’t any user’s operation.
3.3.5 Aperture Iris Diaphragm Adjustment
(Fig.20, 21)
Turn the aperture iris diaphragm lever①to adjust
the aperture iris diaphragm.
Generally, setting the aperture iris diaphragm to
70- 80% of the N.A. of the objective in use will
provide an image with good contrast.
●If the size of the aperture diaphragm minified,
the brightness and the resolution declined, while
the contrast and the depth of field increased; In
other words, if the size largen, the brightness and
the resolution improved, but the contrast and the
depth of field declined.
●Generally, setting the size of the condenser
aperture diaphragm at 70% ～80% of the
numerical aperture, you can obtain a clear image
with enough contrast. If the open of the aperture
diaphragm is too small, the resolution were very
low, so please don’t
Magnification: 10×
N.A.: 0.25
①
Fig.20
Fig.21
Specimen
Image ofAperture Iris Diaphragm

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●Minify the aperture below 60% of the objective’s numerical aperture unless in a special case, for
instance, observing an almost transparent specimen.
●The numerical aperture is marked on the objective. For example, the mark “10/0.25 ” means the
magnification is 10×, and the numerical aperture is 0.25.
●If you want to observe the image of the aperture iris diaphragm, remove one eyepiece and look
through the tube. You will see a dark circle encroaching on the bottom of the tube.
3.3.6 Adjusting the Interpupillary
Distance (Fig.22)
The interpupillary distance range:
55mm～75mm.
While looking through the eyepieces,
move both sliders to adjust interpupillary
distance until the left and right fields of
view coincide completely. The value on
the right slider is your interpupillary
distance.
3.3.7Adjusting the Diopter (Fig.23)
Turn the diopter rings②on both eyepieces to
align the number on the rings (which is
corresponding to your interpupillary distance)
with the white dot③on both sliders to bring the
specimen into focus.
★ The diopter range of the eyepiece is ±5
diopter. The number aligned to the line
on the viewing head is the diopter in use.
②
Fig.23
③
Fig.22
①

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4. Specification Table
4.1 Main specifications
Mechanical Tube Length
160mm
Viewing Head
Sliding Monocular/Binocular/Trinocular Head, 45°Inclined, Interpupillary
Distance55-75 mm
Eyepiece
Field of view: φ18mm
Nosepiece
External Quadruple Nosepiece
Objective
Achromatic objectives 4×, 10×, 40×, 100×(immersion oil)
Focusing
Coaxial Coarse & Fine Adjustment, Moving Range 30mm, Fine Division
0.002mm.
Condenser
Abbe Condenser, NA=1.25
Stage
Double Layers Mechanical Stage 140mm×140mm, Moving Range 74×50mm
Illumination
LED illumination or 6V/20W Halogen Lamp
4.2 Eyepieces and Objectives
1. Achromatic Objectives
Magnification
Numerical
Aperture
(NA)
Thickness of glass
slide (mm)
Focal length
(mm)
Working
Distance(mm)
Type
4×
0.10
0.17
31.05
18
Dry
10×
0.25
0.17
17.13
6.5
Dry
40×
0.65
0.17
4.65
0.53
Dry
100×
1.25
0.17
2.906
0.13
Oil

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Plan Achromatic Objectives are optional
2. Eyepieces
Designation
Magnification
Field of view(mm)
Focal Length(mm)
Wide Field
10X
Φ18
24.94mm
Plan Field
16X
Φ11
15.58mm
4.3 Total Magnification
Eyepiece
10×
10×
10×
10×
Objective
4×
10×
40×
100×
Total Magnification
40×
100×
400×
1000×
5．Outfit
Designation
Magnification
Numerical Aperture
Working Distance
Plan Achromatic
Objective
4X
0.10
15.8mm
10X
0.25
12.2 mm
40X(S)
0.65
0.37 mm
100X( Oil,S)
1.25
0.13 mm
Component Name
Specification
Quantity
Standard Outfit
Main body
Main Standard
1
〇
Double Layers Mechanical Stage
1
〇
Condenser Holder
1
〇
Viewing Head
Digital binocular head
1
〇
Condenser
Abbe Condenser, NA=1.25
1
〇
Nosepiece
Quadruple
1
〇
Illumination
LED illumination
1
〇

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6．Troubleshooting Guide
1. Optical system
TROUBLE
CAUSE
SOLUTION
The edge of the field
of view is dark or the
brightness is not
uniform
The nosepiece is not in the located position
(objective and light path not coaxial)
Locate the nosepiece
properly where it clicks
The image of filament is not centered
Center the filament
A lens (the objective, condenser, eyepiece or
collector) is dirty.
Clean it thoroughly
Find dust and stain in
the field of view
There are stains on the lens（including condenser,
objective, eyepiece and collector）
Clean it up
There are stains on the specimen
Clean it up
The position of the condenser is too low
Loosen the condenser’s
locking bolt, adjust the
condenser to the right
position
The image is
defocused ( low
There is no cover slip on the specimen
Add coverslip
The cover slip is too thick or too thin
Use the standard coverslip
( 0.17mm )
The specimen is placed inversely
Reversal it back
There was oil on the dry objective(easily happened in
40X objective)
Clean it up
There are stains on the lens（including condenser,
objective, eyepiece and collector）
Clean it up
6V20W Halogen Lamp
1
〇
Spare lamp (6V20W Halogen lamp)
2
〇
Spare fuse(2A)
2
〇
Eyepieces
10× Plan Eyepieces
2
〇
Objectives
Achromatic objective 4×
1
〇
Achromatic objective 10×
1
〇
Achromatic objective 40×
1
〇
Achromatic objective 100×(oil, spring)
1
〇
Condenser
Bright Field Condenser with Adjustable
Iris Diaphragm
1
〇
Filter
Blue, Green
1 ea.
〇

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resolution \ contrast)
didn’t use oil for the oil objective
Use immerse oil
There was bleb in the oil
Eliminate the bleb
Use a unsuitable oil
Change to the specified
one
The size of the aperture diaphragm is too big
Minify it
There are stains on the incident lens of the binocular
tube
Clean it up
The size of the aperture diaphragm is too small
Open it up
The position of the condenser is too low
Adjust the position
One side of the
image is dark
The condenser is not in the center of the field of
view\the condenser inclines
Install the condenser again
and adjust the center
carefully by centering the
bolt
The nosepiece is not in the right position
Turning it until it reach the
“clicked” position
The specimen is floating
Fix it
The image shift
during focusing
The specimen slips on the stage
Fix it
The nosepiece is not in the right position
Turn it to the
“ clicked ”position
The image is a little
yellow
Not use the blue color filter
Use the blue filter
The brightness is not
enough
The size of the aperture diaphragm is too small
Adjust again
The position of the condenser is too low
Adjust the position
There are stains on the lens（including condenser,
objective, eyepiece and collector）
Clean it up
2. Mechanical system
TROUBLE
CAUSE
SOLUTION
The image can not
focus when using high
magnification
objective
The specimen is placed inversely
The coverslip is too thick
Turn inversely
Use the standard coverslip (0.17 mm)
The objective touch
the specimen when
changed from low
magnification to the
higher magnification
The specimen is placed inversely
The coverslip is too thick
Turn inversely
Use the standard coverslip(0.17 mm)
The specimen is not
easy to move
The specimen holder is not fixed
Fix it
The binocular image is
not coincident
The interpupillary distance is not
correct
Adjust it

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Eyes are too tired
No diopter adjustment
Adjust the diopter correctly
The brightness is not suitable
Adjust the voltage of the lamp
3. Electrical system
TROUBLE
CAUSE
SOLUTION
The lamp can’t light
when the switch is
turned on
No power
Check the connection of the power
cord
The bulb is not inserted
Insert it correctly
The bulb burns out
Replace it
The lamp burns out
suddenly
Use a substandard lamp
The voltage is too high
Use the specified lamp to replace, if the
problem is not solved, contact with the
service department
The brightness is not
enough
Use a substandard lamp
The voltage is too low
Use the specified lamp
increase the voltage
The bulb flickers or the
brightness is
vertiginous
The bulb is going to burn out
Replace it
The bulb is not entirely inserted into
the holder
Check and insert it again
Promise about Quality
On the premise of proper transportation, operation and storage, we will provide
free repair or parts or product replacement if the instrument can’t work due to quality
defect within 36 months of date of delivery.
If you encounter any trouble in using, check it according to the troubleshooting
guide first, do not disassemble the microscope by yourself. Contact with the service
department or the factory if necessary.