BestScope BLM2-241 User manual

Biological Microscope
BLM2-241
Instruction Manual
This manual is for biological microscope Model BLM2-241. To ensure the safety, obtain optimum
performance and to familiarize yourself fully with the use of this microscope, it is strongly recommended
that you study this manual thoroughly before operating the microscope. This manual is mainly for optical
part, regarding the manual for the LCD digital camera, please refer to the camera manual and software
manual.

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CONTENTS BLM2-241
CONTENTS……………………………………………………………
1
USER NOTICES……………………………………………………
2
1 Components Name ………………………………………………
3
2 Assembly …………………………………………………………
4
2.1 Assembly Diagram ………………………………………………
2.2 Assembly Procedures ……………………………………………
4
5
3 Adjustment ………………………………………………………
9
3.1 Adjustment Set Diaphragm…………………………………………
9
3.2 Adjustment Procedures ……………………………………………
11
4 Technical Specifications …………………………………………
14
5 Outfit………………………………………………………………
15
6 Trouble Shooting…………………………………………………
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USER NOTICE BLM2-241
I. Safety Note
1. Open the box carefully to avoid the accessories, like lens, dropping to ground or 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 flat, horizontal and firm enough.
3. When moving the microscope, carefully carry it with the handle and the base.
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 and cut off the power supply before
replacing the bulb or the fuse. If you replace the bulb during use or right after use, allow the
lamp bulb and the lamp house to cool completely before touching.
(Designated bulb：6V/20W Halogen Lamp)
7. Check the input voltage: be sure the input voltage which is 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. Always use the power cord provided by BestScope.
II. Maintenance and Care
1. All the lenses have been adjusted properly; do not dismount them by yourself please.
2. The nosepiece and coarse and fine focusing parts are so delicate that it is forbidden to
disassemble them carelessly by yourself.
3. Keep the instrument clean, and do not pollute the optical element when wiping away the dust
on the instrument.
4. The contaminations on the prism, like fingerprints and oil smudges, could be gently wiped with
a piece of soft cloth or tissue paper, gauze which has been immersed in pure alcohol or ether.
(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.)
5. 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
neutral detergent.
6. When using, if the microscope is splashed by liquid, cut off the power at once, and wipe away
the splash.
7. Do not disassemble any parts of the microscope, as this will affect the function or reduce the
performance of the microscope.
8. 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 Name BLM2-241
Eyepiece
Binocular viewing head
Nosepiece
Objective
Main body

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①
②
BLM2-241
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 components is clean, do not score any parts or glass surface.
Keep well with hexagon wrench provided. When changing the components, you will need it again.
Main body
Objective
Trinocular
viewing head
10X Eyepiece
④
③
Power cord

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BLM2-241
2.2 Assembly Procedure
Fig.1
Fig.3
Fig.2
2.2.1 Installing trinocular viewing head
(Fig.1-2)
Insert the binocular viewing head into the
microscope head and turn it to a proper
position, then screw down the bolt to fix it.
2.2.2 Installing the eyepiece (Fig3-4)
Insert the eyepiece into the eyepiece tube
until they are against each other, as shown
in Fig.4.
Fig.4

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BLM2-241
Fig.6
Fig.5
Fig.7
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 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”,
that means the objective is in place.
.2.4 Mounting the filters (Fig.7)
1. Place the required filter in front of the
condenser..
★the filter of the standard outfit is green and
baby blue.

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BLM2-241
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. Set the main switch① to “O” (off) state
before connecting the power cord.
2. Insert the plugs② into the power jack
③of the microscope safely.
3. Plug the power cord④into the power
supply receptacle⑤. 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.
2.2.6 Replacing the fuse (Fig.8-10)
Do remember to set the main switch①to
the state “O” (OFF) and unplug the power cord
before replacing the fuse. Rotate the fuse⑥
out of the holder⑦with the “--”type
screwdriver, replace with a new fuse, then
rotate it back to the holder again.
Fig.8
Fig.9
Fig.10

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Fig.11
BLM2-241
Fig.12
2.2.7 Installing and Replacing the bulb
(Fig.11-13)
Please use the specified halogen Lamp
6V20W.
1. Pull out the condenser holder as shown in
Fig.11.
2. Hold the bulb①after you wrap it with
gauze or other protection materials, and
then insert its pin②deeply into the jack
in the lamp holder.
3. During microscope using or soon after it is
turned off, the bulb, the lamp house and
nearby parts will be very hot and will
cause serious burns. Please turn the main
switch to “O” (off) and disconnect the
power plug, and make sure the bulb, the
lamp room and periphery are all cool.
Then, you can do your replacing.
Insert the bulb gently. Squeezing too hard
will damage the bulb.
To prevent reduced bulb life or cracking, do
not touch the bulb with bare hands. If
fingerprints are accidentally left on the
bulb, wipe the bulb with a soft cloth.
4. Place the condenser holder back and
press fit.
Fig.13

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3. Adjustment and operation BLM2-241
3.1 Adjustment set diagram (Fig.14-15)
Right Fine Focus Knob
Right Coarse Focus Knob
TensionAdjustment Collar
Main Switch
Portrait Adjustment Knob
Lateral Adjustment Knob
Brightness Adjustment Knob
Fig.14