BestScope BS-2005 Series User manual

Bestscope International Limited
0
Biological Microscope
BS-2005 Series
Instruction Manual
This manual is for users of BS-2005 Biological Microscope. To ensure your safety,
obtain optimum performance, and to familiarize yourself fully with the use of this
microscope, we recommended that you study the instruction manual carefully.

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Ⅰ. Application
BS-2005 Biological microscope, which is widely used in schools, medical and hygienic
establishments for conventional microscopic examination, general biologic, pathologic
and bacteriological studies, clinical investigations and classroom demonstrations.
Designed in a very modern way what can take convenient and safe to your operations.
Main Switch and
Bright Adjustment
Knob
Collector
Eyepiece
Objective
Monocular Head
Coarse
Adjustment Knob
Fine Adjustment
Knob
Stage
Condenser
The Light Above

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Ⅱ. Main Technical Specification
1. Mechanical tube length:160mm
2. Objective (Achromatic):
Magnification
Numerical Value Aperture
Diaphragm (N.A)
Focus
f(mm)
Working
Distance(mm)
comment
4X
0.10
31.05
30.9
10X
0.25
17.13
7.54
40X
0.65
4.65
0.58
3. Eyepiece
Kind
Magnification
Focus f(mm)
Field Of View (mm)
Plan Eyepiece
10X
25
Ø15
4. Total magnification
5. The conjugate distance of objective: 185mm
6. Stage: an single stage with clip. Size 90mmX90mm
7. Coarse Focusing range: 17mm
8. Condenser: Single Lens NA0.65 with Iris Diaphragm
9. Illumination: LED Lamp Illumination 0.1W, Brightness Adjustable. USB Lamp
Illumination is alternative.
Eyepiece
10X
10X
10X
Objective
4X
10X
40X
Total Magnification
40X
100X
400X

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Ⅲ. Outfits
Component Name
Specification
BS-2005M
BS-2005B
Monocular Head, inclined at 45°
●
Viewing Head
Binocular Head, inclined at 45°, Interpupillary
distance 54-77mm
●
Eyepiece
10X Wide Field Eyepiece
●
●
4X
●
●
10X
●
●
40X
●
●
Objective
100X
○
○
Condenser
Single Lens NA 0.65 with Iris Diaphragm
●
●
Nosepiece
Triple Nosepiece
●
●
Plain Stage with Slide Clips, 90×90mm
●
●
Stage
LED Lamp 0.1W, Brightness Adjustment
●
●
Focusing System
Coaxial Coarse and Fine Adjustment
●
●
Ⅳ. Configuration
a). Eyepiece, Objective and Nosepiece
The monocular microscope has wide field eyepiece 10× and achromatic objective 4×,
10×, 40× and 100×. The nosepiece is small structured, and located stably and exactly.
It has a large and sharp image, with 360º rotatable monocular or sliding binocular
head.
b). Bend arm and Coarse and fine focusing knob
The curved arm use C-shaped, has sprightly lines. Also, with upper focus stop. The
coarse focusing adjustment adopts dovetail guide which make focusing adjustment
smooth and comfortable.
c). Base
The base is designed to the instrument, which having a streamlined shaped circular,
and it harmonized the aim’s shape slinky, Electrical components and lamp built inside
it as the illuminator.
d). Stage:Fixed stage

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e). Illumination:
The system consists of illuminator which contains collector / mirror, iris aperture
diaphragm and condenser.
Ⅴ. Assembly
a) Working environment requirement:
1). Room temperature: 0-40℃.
Maximum comparatively humidity: 85%
2). High temperature, which will result in mildew, dew and even ruinous instrument.
3). Avoid from the dust room. When it is not in use, please cover the microscope
with dust cover.
4). Please place the microscope in a stable situation without any surging.
b) Check the Input voltage: be sure the power supply voltage is accordant with the
nominal input voltage which is signed outside the microscope, or it will bring a serious
damage to the microscope.
c) Lamp
1). The lamp has been well adjusted and checked before the microscope leaves
factory.
2). Lamp replacement:The lamp has its standard service life. When it has expired, a
lamp replacement is necessary. Set the main switch to off state, disconnect the
power cord from the wall outlet, then allow the old bulb to cool before replacing the
bulb with a new of the designated type. Open the lamp holder on the bottom of
microscope to do the replacement, the surface of the new lamp bulb should be clean
and free of fingerprint or dirt, which will decrease the brightness or even explode the
bulb .
3). Eyepiece: Please insert the eyepieces into the eyepiece tubes.4.
4). Condenser: Condenser has been installed under the stage, which is threaded
installation, can be spin out counterclockwise.

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Ⅵ. Operation:
1. Insert the eyepiece into the inclined eyepiece tube, then rotate the objectives in
sequence, according to their magnifications, into the threaded holes of the nosepiece.
Place the specimen in the center of the field of view. First use low power objective to
find the specimen image and then observe it with high power objective, at the same
time, adjust fine focusing knob until the image is clear. When using 100×
oil-immersion objective, the space between the front of objective and specimen
surface should be full of cedar oil. Drops of cedar oil must be strictly free from air
bubble, and the objective should be cleaned immediately after using, otherwise it may
solidify and make cleaning difficult.
2. When using objectives of different magnification, please adjust the iris diaphragm
of the condenser to bring its numerical aperture and objective’s numerical aperture
into coincidence.
Ⅶ. Maintenance and storage
1. When you open the carton, please be careful not to make the lens dropping.
2. All the lens has been adjusted by manufacturer already, please do not disassemble
by yourself.
3. Nosepiece, coarse and fine focus is installed precisely, please do not disassemble
by yourself.
4. You should make the instrument clean, and often wipe the dusts.
5. Place the instrument in a shady, cool and dry place, when finishing the operation,
always use the dust cover for protection.
Ⅷ. Troubleshooting Guide
If problems occur during use, please review the following list and take remedial action
as needed. If you cannot solve the problem after checking the entire list, please
contact the service department for as distance.

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1. Optical Part
Problem
Cause
Solution
The nosepiece is not in located
position(objective is not in the
center of the optical path)
Turn to the right position
(turn objective to the
optical light center）
The edge of the field of
view has shadow or the
brightness is uneven
The surface of the lens is moldy
or has contaminant (including
condenser, objective, eyepiece
and collector)
Clean it up
There are stains on the lens
(include condenser, objective,
eyepiece and collector)
Clean it up
Find dust and stain in
the field of view
There are stains on the specimen
Clean it up
There is no cover slip on the
specimen
Add cover slip
The cover slip is too thick or too
thin
Use the standard cover
slip(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
No immersion oil on the
immersion objective
use immersion oil
Image quality is very
poor(low resolution and
poor contrast)
The immersion oil has bubble
clean out bubble

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Have used the unsuitable oil
use suitable oil
The nosepiece is not in the right
position
Turning it until it reach the
“clicked” position
One side of the image is
dark
The specimen is floating
Fix it
The specimen slips on the stage
Fix it
The image shifts during
focusing
The nosepiece is not in the right
position
Turn it to the “ clicked”
position
2. Mechanical Part
Problem
Cause
Solution
The image can not
focus when using high
magnification objective
The specimen is placed
inversely
The cover slip is too thick
Turn inversely
Use the standard cover slip
(0.17 mm)
The objective touches
the specimen when
change the low
magnification to the
higher magnification
The specimen is placed
inversely
The cover slip is too thick
Turn inversely
Use the standard cover slip
(0.17 mm)
The specimen is not
easy to move
The specimen holder is not
fixed
Fix it
The eyes is too tired
No diopter adjustment
Adjust the diopter correctly

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3. Electrical Part
Problem
Cause
Solution
No power
Check the connection of the
power cord
The bulb is not inserted
Insert it correctly
The lamp is off when turning
on the switch
The bulb burns out
Replace it
Use a substandard lamp
Use the specified lamp
The brightness is not
enough
The voltage is too low
Add the voltage
The bulb flickers or the
brightness is vertiginous
The bulb is going to burn out
Replace it