BestScope BS-2046 User manual

BS-2046 Biological Microscope
Instruction Manual
BS-2046B
This manual is for BS-2046 series biological microscopes. To ensure your safety, obtain optimum
performance, and to familiarize yourself fully with the use of this microscope, we recommend
that you learn the instruction manual carefully before using the microscope.

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Contents BS-2046
User Notices........................................................................................ 2
1. Components Name........................................................................ 4
2. Structure Overview....................................................................... 5
3. Installation.................................................................................... 7
3-1 Installing Diagram ..................................................................................7
3-2 Installing Steps .......................................................................................8
3-2-1 Installing the viewing head ...........................................................8
3-2-2 Installing the eyepiece..................................................................8
3-2-3 Installing the condenser................................................................8
3-2-4 Installing the objective..................................................................9
3-2-5 Install the filter.............................................................................9
3-2-6 Connecting the power pord ........................................................10
4. Adjustment And Operation..........................................................11
4-1 Turn on the power................................................................................11
4-2 Adjust the brightness and color temperature.......................................11
3-3 Mount and move specimen..................................................................12
4-4 Adjust interpupillary distance...............................................................13
4-5 Diopter adjustment ..............................................................................13
4-6 Adjusting the condenser.......................................................................13
4-7 Focusing ...............................................................................................14
4-8 Focusing upper limit.............................................................................14
4-9 Adjust the tightness of the focusing hand-wheel..................................14
5. Technical specification .................................................................15
6. Troubleshooting Guide.................................................................16

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User Notices BS-2046
I. Safety Symbols
II. Safety Notes
1. Open the box carefully to avoid the accessories, like lens, being polluted by fingerprint or
sweat strain, 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 microscope, one hand hook into the bottom slot front of the frame, and
the other hand hold the rear end of the cross beam.
4. 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.
5. Be sure to keep at least 10cm away from the left, right, top, rear of the microscope from
walls and other objects, so as not to plug natural convection air, which is used for cooling.
6. Make sure the instrument is earthed, to avoid lightning strike.
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.
Symbol
Meaning
Main power switch is on
Main power switch is off
The WEEE flag, discarding this product must be sent to the appropriate facility
for recycling and recycling.
Represents the focusing limiting knob direction, “ADJUST”: adjust the upper
limit, “SET”: locks the upper limit
Represents the tension adjustment collar direction, “+”: tightening the collar,
“-”: loosing the collar
Light intensity and color temperature direction. Turn toward the tip, the light
intensity and color temperature changes from strong to weak
Pass CE

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BS-2046
III. Maintenance
1. All the lenses have been well checked and adjusted. It is forbidden to disassemble them by
yourself.
2. The nosepiece, coarse and fine focusing parts are so delicate that it is forbidden to
disassemble them carelessly by yourself.
3. Keep the instrument clean, wipe dust regularly, and be attention to avoid contaminating the
optical elements especially. The objective lenses should be cleaned every month by professional.
4. We can clean the contaminations such as fingerprints and oil smudges on the prism by using
the tissue paper and solution, which is mixed by ether (70%) and alcohol (30%).
Noting that 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.
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.

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1. Components Name BS-2046
Objective
Eyepiece
Viewing Head
Condenser
Nosepiece
Main Body
Stage

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2. Structure Overview BS-2046
1
2
3
4
5
6
1. Left fine focus knob
2. Left coarse focus knob
3. Focusing limiting knob
handwheel
4. Main switch
5. Display screen
6. Aperture diaphragm adjustment

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BS-2046
1. Fixing screw for Viewing Head
2. Fixing screw for condenser
3. X direction adjustment knob
4. Y direction adjustment knob
5. Brightness and color temperature adjustment knob
6. Right fine focus knob
7. Right coarse focus knob
8. Tension adjustment collar
9. Power socket
10. Anti-theft lock hole
1
3
4
5
6
7
8
9
2
10

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3.Installation BS-2046
3-1 Installing 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

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BS-2046
3-2 Installation Steps
3-2-1 Installing the viewing head (Fig.1)
Install the viewing head into the microscope
circular swallow tail by the path ① shown in
Fig.1, tighten the auxiliary screw and turn it to
the proper position, then fix up it by bolt.
3-2-2 Installing the eyepiece (Fig.2)
Insert the eyepieces into the eyepiece tube
until they are against each other according to the
path ②shown in Fig.2.
3-2-3 Installing the condenser (Fig.3)
Place the condenser in right place so that
the adjustment position mark of the aperture iris
diaphragm faces front. Then tighten two screws
to fix up the condenser.
Fig.1
Fig.2
Fig.3
Fastening screw for condenser
screw
Auxiliary screw
①
②

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BS-2046
3-2-4 Install the Objective (Fig.4)
1. Adjust the coarse &fine focus knob, till the
mechanical stage to the low limited place.
2.The objective with the lowest
magnification rate is twisted to the nosepiece
from the left or right side, then push the
objective nosepiece clockwise, Install other
objective lenses in order from low to high
magnification. (The objective magnification shall
be consistent with the show on the display, and
the product was installed at the factory).
 Clean the objective frequently.
 At first, use the 10X objective to looking for
image, then change another one.
Turn the objective till hear the “click” sound,
make sure the objective enter the objective
center.
3-2-5 Install the Filter (Fig.5)
Put the filter in the seat of illuminator
according to the path ①shown in Fig.5 .
 The standard filter is green.
Fig.4
Fig.5
①

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BS-2046
3-2-6 Connecting the Power Cord (Fig.6,7)
★ The cable and cords are vulnerable when
bent or twisted, never subject the power cord to
excessive force.
1.Set the main switch ① to “ ” (off)
state before connecting the power cord.
2.Insert the plugs of power cord ⑤ into the
power jack ④ of the adapter safely. Make sure
the connection is well.
3.Insert the plugs of adapter ③ into the
power jack ② of the microscope safely. Make
sure the connection is well.
4.Insert the plugs of power cord ⑥ into the
power jack of the power supply receptacle. 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.
★ A wide range of voltage ,like 100V～240V, is
acceptable for this microscope.
Fig.6
Fig.7
①
③
②
④
⑤
⑥

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4. Adjustment and Operation BS-2046
4-1 Turn on the power (Fig.1)
Connect the power ①, turn on the main
switch ②on the back of microscope to
“ ”(on).
4-2 Adjust the brightness and color
temperature (Fig.2,3,4,5,6,7)
Push in+upward rotation: Switch to the
color temperature adjustment state;
Push in+downward rotation: Switch to the
brightness adjustment state;
The adjustment knob ③ adjust the
brightness when the screen is shown as Figure 3.
Turning the brightness adjustment knob
according to the direction indicated by an arrow
on the figure 2, the brightness decreases.On the
contrary, the brightness strengthen.
The knob adjust the color temperature
when the screen is shown as Figure 4. Turning
the color temperature adjustment knob
according to the direction indicated by an arrow
on the figure 2, the color temperature decreases.
On the contrary, the color temperature
strengthen.
◎ Other operation of brightness adjustment
knob for BS-2046 model
1. Click Knob: enter the standby state and
“SLEEP” appears on the screen (Fig.5). Click
again to eliminate the state, the “SLEEP” on the
screen disappears and the normal working state
is displayed;
Fig.1
Fig.2
③
Fig.3
TIM
E
7000K
Fig.4
②
①
SLEEP
Fig.5

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BS-2046
2. Long press the knob for 3s: choose to set
sleep (Fig.6), and the value of minute starts to
beat. The value of hours tarts to beat after
clicking the knob. The time can be increased or
reduced by turning the knob. The increase or
decrease of lattice value is 1 minute and the
maximum value can be set to 8 hours. After
setting to the required time, the time number
beats three times and then stops beating, which
meaning the setting is successful. Time begins to
decrease by minute;
3. Double-click Knob: lock brightness or unlock
(Fig.7). The brightness adjustment knob fails
when locking, and ”LOCK” appears on the LCD
screen; ”LOCK” means that the user sets specific
brightness when using a certain magnification
objective, and uses the lock function to prevent it
from being changed by another user. (In this case,
when switching to another magnification
objective,
the brightness automatically change to the
brightness of the corresponding magnification,
but the brightness adjustment knob fails.
Double-click the knob again to release the lock
and the “LOCK” on the screen disappears.
4-3 Mount and move the Specimen (Fig.8)
Pull out the movable claw, place the
specimen in the center of the mechanical stage,
loosen the movable claw and clamp the
specimen.
★Be careful when changing the objective.
When the objective needs to be replaced after
observing the specimen with a short working
distance objective, the objective may collide
with the specimen
Turn the X-Y direction adjustment knob ①
of the mechanical ruler, move the specimen to
the required position.
Fig.6
Fig.8
Fig.7
①

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BS-2046
Aperture diaphragm adjustment staff
Fig.10
4-4 Adjusting the interpupillary distance
(Fig.9)
The interpupillary distance range:
48mm~75mm. While looking through the
eyepieces, adjust for binocular vision until the
left and right fields of view coincide completely.
4-5 Diopter Adjustment (Fig.10)
Turn the eyepiece to adjust the diopter
while looking through it.
★ The diopter range of the eyepiece is ±5
diopter. The number aligned to the line on the
viewing head is the diopter in use.
4-6 Adjusting the condenser (Fig.11)
Centering the Condenser:
The condenser and the objective are coaxial.
It has been adjusted before leaving factory, so the
user needn’t to adjust them by self.
Adjusting Aperture Iris Diaphragm:
The aperture iris diaphragm is designed for
the adjustment of the numerical aperture, not for
the brightness. 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
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.
Fig.9
Fig.11

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BS-2046
4-7 Focusing (Fig.12,13)
1. Use the 10×objective focus, to avoid the
objective touch with the specimen, you should turn
the coarse focus knob ① to raise the mechanical
stage at first, let the specimen close to the
objective, then slowly separating them to focus.
2. 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 ② to focus. At this moment, you can
replace other magnification objectives safely, and
focus without the risk of destroying the specimen.
 If you need to fix the stage on a vertical
position to make the observation become more
convenience, take use of the position hand-wheel.
4-8 Focus upper limit (Fig.12)
In actual use, if you want to lock the stage
height, that is, the upper limit position of focusing
according to the situation. Turn the focusing
limiting knob ③ through in the direction of “set”
in the corresponding upper limit position.
4-9 Adjust the tension adjustment collar
(Fig.13)
10. The 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 tension adjustment collar ④ to
the right position.Turning the collar in the direction
of “+” increases the tension. When the collar is
turned in the direction of “-”, the tension of the
collar decreases.
If the stage descends on its own or if the
specimen gets out of focus quickly even when it is
brought into focus using the fine adjustment
knob③, it means the tension of the coarse
adjustment knob is too low. Turn the collar in the
direction of “+” to increase the tension.
3-10 显示屏（图 9）
Fig.12
Fig.13
①
②
③
④

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5.Technical specification BS-2046
5.1 Main Technical Specification
Component
Specification
BS-2046B
BS-2046T
View head
Seidentopf Binocular Head
●
○
Seidentopf Triocular Head
○
●
Eyepiece
10×/20x Plan Eyepiece
●
●
Nosepiece
Quadruple
●
●
Objective
Infinite Plan Objective:4×, 10×, 40×, 100×
●
●
Stage
Rackless stage, size:180×130mm, moving range:
74×30mm
●
●
Illumination
3W LED lamp
●
●
Condenser
NA1.25
●
●
Display
objective magnification, brightness, color
temperature
●
●
NOTE: ● standard outfit; 〇 optional
5.2 Objective Parameter
5.3 Electrical parameter
1) Input voltage: VAC100-240V 50/60 Hz
2) Lighting: 3W S- LED
Magnification
Numerical
Aperture (N.A)
Focal Length
(mm)
Cover glass
thickness
Objective
4X
0.10
28.0
0.17
dry
10X
0.25
7.4
0.17
dry
40X
0.65
0.7
0.17
dry
100X
1.25oil
0.14
0.17
oil
图27

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6.Troubleshooting BS-2046
6.1 Optical Part
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 (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 LED is not centered
Adjust it to center
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it thoroughly
Find dust and stain
in the field of view
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it thoroughly
There are stains on the slide
Clean it thoroughly
Bad image quality
(low-resolution, bad
Contrast)
No cover glass on the specimen
Add cover glass
The cover glass is too thick or too
thin
Use standard cover glass with
thickness of 0.17mm
The specimen is on the reverse side
Turn it over
Dry objective has oil on it. (Especially
for 40X objectives)
Wipe the oil
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it
Immersion oil is not used with the
100x objective
Use specified oil
Air bubbles existed in the immersion
oil
Eliminate the bubble
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
One side of the
image darkens
The condenser is not in the center of
the field or the condenser incline
Reset the condenser
The nosepiece is not in the located
position
Rotate the nosepiece to the
required position
The specimen is in the floating state
Fix it firmly
The image move
when focus it
The specimen is floating on the stage
Fix it firmly
The nosepiece is not in the located
position
Rotate the nosepiece to the
required position
The brightness is
not enough
The brightness is not adjusted
accurately
Adjust the brightness
adjustment knob
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it thoroughly

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BS-2046
6.2 Mechanical Part
TROUBLE
CAUSE
SOLUTION
The image can’t focus
using high-magnification
objective
The slide is on the reverse
side
Reverse the slide
The cover glass is too thick
Use standard cover glass with
thickness of 0.17mm
The objective touch the
cover glass when it
change from low
magnification to
high-magnification
The slide is on the reverse
side
Reverse the slide
The cover glass is too thick
Use standard cover glass with
thickness of 0.17mm
The binocular images do
not coincide
The interpupillary distance is
not correct
Adjust it correctly
Eyes too tired
The diopter is not proper
Adjust the diopter properly
The brightness of the
illumination is not proper for
eyes
Adjust the lamp voltage
The objective
magnification does not
match the screen display
magnification
The objective is not properly
installed to the specified
converter hole
Adjust the objective to the
corresponding hole position depend
on the display
6.3 Electric Part
TROUBLE
CAUSE
SOLUTION
The LED lamp does not
light when the switch is
on
No power or the fuse burn out
Check the connection of the
power cord or the fuse
The LED lamp is broken
Replace it
The brightness is not
enough
LED lamp attenuates after long
time use
Replace the LED lamp
The bulb flickers
The light bulb is going to wear out
Replace it
The LED lamp does not
light when the switch is
on
No power or the fuse burn out
Check the connection of the
power cord or the fuse
Display is not working
properly
Improper screen connection
Check the internal
connections and reconnect
well

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After-sales service commitment:
Within 36 months from the date of delivery, on the condition that
the instrument cannot work due to non-human factor quality problem,
our company guarantee the repair and replace the parts.
Our company provide lifelong maintenance service for the products,
in addition, beyond warranty, we supply spare parts in the long run,
which has a concessional price.
BestScope International Limited
Add: 4#811, No.26 Financial Street, Shi Jing Shan District,
Beijing, China
Tel: [phone],
Cell phone/WhatsApp: [phone]
E-mail: [email protected]
Http: www.bestscope.net