BestScope BS-2020B User manual

Biological Microscope
Model：BS-2020B/T
Instruction Manual
This manual is written for biological microscope BS-2020B/T. To ensure the safety, obtain
optimum performance and to familiarize you fully with the use of this microscope, it is
recommended strongly that you study this manual thoroughly before using the microscope and
retain this manual in an easily accessible place near the work desk for future reference.

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CONTENTS BS-2020
User Notices………………………………………………………… 2
1 Components Name…………………………………………………… 4
2 Installation …………………………………………………………… 5
2.1 Installing Diagram…………………………………………………………… 5
2.2 Installing Steps ……………………………………………………………… 6
3 Adjustment & Operation ………………………………………… 10
3.1Adjustment Controls …………………………………………………………… 10
3.2 Operation ………………………………………………………………………… 11
4 Technical Specifications …………………………………………… 14
5. Outfit Table ………………………………………………………… 15
6 Troubleshooting ……………………………………………………16

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User Notices BS-2020
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. 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 (LED) lamp or
the fuse, then cut off the power, and do the operation after the lamp bulb and the lamp house
completely cool.( specified lamp: Halogen Lamp 6V/20W or LED lamp 3W)
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. 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-2020
Biological Microscope BS-2020B
Eyepiece
Binocular/Trinocular viewing head
双目观察头
Nosepiece
Objective
Body
Condenser
Collector

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2．Installation BS-2020
2.1 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 components 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.
显微镜体
物镜
Binocular
看
Viewing
Head
头
10X 目
镜
④
③
①
②
电源线
Binocular Viewing Head
10X Eyepiece
Objective
Body
Cable Wire

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BS-2020
2.2 Installing Setps
①
Fig.1
Fig.3
Fig.2
2.2.1 Install the binocular viewing head
(Fig.1-2)
Insert the binocular viewing head into the head of
the body, turn to the right position, then fix up it with
bolt①.
2.2.2 Install the eyepiece (Fig.3-4)
Insert the eyepieces into the eyepiece tube until
they are against each other.
Fig.4 shows the status after the installation.
Note:
Working Environment Requirement：
1．Ambient temperature: 5°C to 40°C
. (41°F to 104°F)，Maximum R.H：85%。
2．High Temperature 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 cover.
4．Lay the microscope in a plan and stable
position please.
Fig.4

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BS-2020
②
①
Fig.6
Fig.5
2.2.3 Installing the Objective (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 in sequence of
magnification.
Installing objective this way will make the
change of magnification easier during
using.
Clean the objectives 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—center of the light
path.
2.2.4 Install the color filter (Fig.7)
1. Rotate the condenser holder①out as Fig.7
shows.
2. Put the filter②into the condenser holder,
and then switch back the holder.
Baby blue and green filters are available in
standard outfit.
Fig.7

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BS-2020
③②
⑥
④⑤
2.2.5 Connecting the Power Cord
(Fig.8-10)
★The cable and cords are vulnerable
when bent or twisted, never subject the
power cord to excessive force.
1. Before connecting the power cord, switch
the main switch①to “O”(off).
2. Plug the power cord②into the socket③on
microscope safely. Make sure the connection
is well。
3. Plug the power cord④into the power source
socket 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.
★Either 110V or 220V can be selected as the
input voltage of this microscope. (The input
voltage has been preset in the microscope
before leaving factory.
2.2.6 Replacing the fuse (Fig.7, 9, 10)
Do remember to turn the main switch①
off before replacing the fuse, and unplug the
power cord②. Dig the fuse⑤kits out of the
power source socket③with your fingers,
replace with a new fuse, then insert it back
to the power source socket again.
★250V500mA fuse for 220V.
★250V1Afuse for 110V.
Fig.8
①
Fig.9
Fig.10

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BS-2020
②
①
④
.
⑥
⑤
2.2.8 Installing and replacing the lamp (Fig.11,
12, 13)
0.246810There are two types of lamp for illumination,
halogen Lamp 6V/20W and LED lamp 3W.
When changing halogen lamp：
1. When being used, 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
switch on “O” (off), pull up power plug, and make sure
the bulb, the lamp house and periphery are all cool.
Then, you can do your replacing.
2. Loosen the bolt①on the lamp holder window at the
base of the microscope by screwdriver, screw lamp
holder window②out.
3. Pull out the halogen bulb③, hold the bulb after you
wrap it with gauze or other protection materials, then
depress the plugs into the jack on the lamp house.
4. Finally, cover the lamp holder window, screw down the
bolt①.
Please insert the lamp gently, or it will be damaged by
excessive extrusion.
Do not touch the Halogen bulb with your hands. It
will shorten the service life or cause it to burst. If you
leave fingerprints on the surface carelessly, clean it
with a dry soft cloth.
When changing LED lamp：
1. The working life of LED lamp is very long, so it is hard
to be damaged, if the bulb is unfortunately damaged,
please purchase a new one from supplier.
2. Removing the bottom board ⑥on the base of
microscope by screwdriver, after removing the bolt⑤,
LED bulb can be taken down, replaced with a new one,
the new bulb should be fixed on holder with bolt⑤.
3. Fixing the bottom board to the base of microscope with
the original bolt.
Please take down the bottom board slowly when
removing it, or the inside electrical wire may be
damaged.
Fig.11
③
Fig.13
Fig.12

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3. Adjustment & Operation BS-2020
3.1Adjustment Set Diagram (Fig.14-15)
Fig.14
Fig.15