BestScope BS-2005 Series User manual

Bestscope International Limited

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.

Bestscope International Limited

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

Bestscope International Limited

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

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

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

Objective

10X

40X

Total Magnification

40X

100X

400X

Bestscope International Limited

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

●

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

Bestscope International Limited

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.

Bestscope International Limited

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.

Bestscope International Limited

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

Bestscope International Limited

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

Bestscope International Limited

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

This manual suits for next models

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