BestScope BLM-210 User manual

LCD Digital Biological Microscope
BLM-210
Instruction Manual
This manual is for BLM-210 LCD digital biological microscope. To ensure the safety, obtain optimum performance
and to familiarize yourself fully with the use of this microscope, it is recommended strongly that you study this
manual thoroughly before operating the microscope. Retain this instruction manual in an easily accessible place
near the microscope for further reference.

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Optical Microscope Part
BLM-210
LCD screen
Objective
Stage
Condenser
Collector
Coarse
Focusing
Knob
Fine
Focusing
Knob
Brightness
Adjustment
Knob
Main
Switch

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1. Application
BLM-210 LCD digital biological microscope is widely used in 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.
2. Specification
2.1 Mechanical tube length: 160mm
2.2 Objective:
Magnification
Numerical Aperture (NA)
Focus Distance
(mm)
Working Distance
(mm)
Remark
4X
0.10
31.05
18
10X
0.25
17.13
7
40X
0.65
4.65
0.53
100X
1.25
2.906
0.13
2.3 LCD digital head
Item
Specification
Viewing Head
7-inch IPS LCD screen with wide visual angle, resolution 1024×600, Built-in 1/2.8”2.0MP
CMOS camera, output 1920×1080 HD Video. 1*USB2.0 interface for mouse, 1* HDMI
interface, 1* SD card slot.
Built-in Camera
Resolution: 2.0MP, 1920×1080
Image resolution: 1920×1080
Video resolution: 1920×1080
Pixel Size: 2.9×2.9μm
2.4Total Magnification
Digital Magnification
14X
14X
14X
14X
Objective
4X
10X
40X
100X
Total
56X
140X
560X
1400X
2.5 Conjugate Distance: 195mm
2.6 Stage：
BLM-210 D.E: Double Layers Mechanical Stage 116mmX125mm
BLM-210 C: Plain Stag with Attachable Mechanical ruler 110×120mm/ 60×30mm
BLM-210 A. B: Plain Stage with Slide Clips 110×120mm
2.7 Coarse Focusing range: 10mm
2.8 Condenser:
BLM-210: Abbe NA=1.2with Iris Diaphragm, Spiral Adjustment
2.9 Diameter of Color Filter: Ø32mm
2.11 Illumination: LED Illumination, Brightness Adjustable

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3. Parameters
Item
Specification
BLM-210
Viewing Head
7-inch IPS LCD screen with wide visual angle, resolution 1024×600, Built-in 1/2.8”
2.0MP CMOS camera, output 1920×1080 HD Video. 1*USB2.0 interface for mouse,
1* HDMI interface, 1* SD card slot.
●
Built-in
Camera
Resolution: 2.0MP, 1920×1080, 1/2.8”
●
Image resolution: 1920×1080
●
Video resolution: 1920×1080
●
Pixel Size: 2.9×2.9μm
●
Nosepiece
Quadruple Nosepiece
●
Objective
Achromatic Objective 4×(195), 10×(195), 40×(195), 100×(195)
●
Achromatic Objective 20×(195)
○
Achromatic Objective 60×(195)
○
Stage
Double Layers Mechanical Stage 110×120mm/ 60×30mm
●
Focusing
Coaxial Coarse and Fine Adjustment, Moving Range 10mm, with stage height
limiting screw
●
Condenser
Abbe NA 1.2 with Iris Diaphragm & Blue Filter, Rack and Pinion Adjustment for
Condenser
●
Illumination
Transmitted LED Illumination, Brightness Adjustable
●
Mirror
○
Spare Parts
Dust Cover
●
Power Supply
AC100-220V power adapter, microscope input voltage DC5V
●
Package
Styrofoam & Carton, Dimension 35×28×45 cm, 6kg
●
Note: ● Standard Outfit, ○ Optional
4. Configuration
a) LCD digital head, Objective and Nosepiece
The monocular microscope has wide field sensor 10X and achromatic objective 4X, 10X, 40X and 100X.
The nosepiece is small structured, and located stably and exactly. It has a large and sharp image, with
360ºrotatable 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 or moveable stage
e) Illumination
The system consists of illuminator which contains collector / mirror, iris aperture diaphragm and
condenser. And the condenser can be lift up and down.

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5. Assembly
a) Working environment requirement:
1) Room temperature: 0-40℃. Maximum comparatively humidity: 85%.
2) High temperature 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. The lamp housing parts become extremely hot during operation. Take care not to burn yourself.
3. 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 .
Note: Must not missing the grounded screw
Do not touch the lamp`s glass part with your hands, when sitting should take gloves or cover
the lamp with protector. Fingerprint or dirt on the surface of the lamp should be cleaned with the
clean cloth with dipping alcohol, which will decrease the brightness or even explode the bulb.
d) LCD digital head:
Please insert the LCD digital head into the dovetail of the microscope body. (There is small screw in
the dovetail, which can make the LCD digital head can not be pull out arbitrarily)
e) Objective:
Lower the stage to its lower limit, then screw down the objectives into the nosepiece (from low to
high).
f) Condenser:
he condenser has been adjusted well before delivery.
g) Collector:
The collector has been adjusted well before delivery. Frame of the collector’s pedestal is screw
thread can taken by contra rotate.
Note: It cannot be taken down when the outfit is LED.
h) Color filter:
Lay the filter into the iris diaphragm bracket under the condenser if necessary.
6. Operation
1. Connect the LCD head to the microscope body, 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 100X 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

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it may solidify and make cleaning difficult.
2. In order to get a sharp and clear image, you must adjust the illumination system. 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. Generally speaking, the rate of objective increase，
the location of the condenser need to move up. Aperture is design for adjust NA and not for adjust
brightness. Usually, aperture is open to 70~80% of the objective’s exit pupil, until can see clearly image in
the view.
3. When to watch the same type of specimens, can adjust limit screw to proper position and lock it up with
nut. Then directly make coarse focusing knob up to the position where the first specimen can focusing
clearly. That can simplify the operation and reduce the working intensity.
Note: The same type of specimen refer to the thickness of the slice, the coverslip and the carry slip are
uniform.
7. 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.
8. 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
assistance.
1. Optical Part
Problem
Cause
Solution
the edge of the field of view has
shadow or the brightness is
uneven
The nosepiece is not in he 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 image of the filament is not in the
center
Center it
The surface of the lens is moldy or has
contaminant (including condenser,
objective, sensor and collector)
Clean it up
Find dust and stain in the field
of view
There are stains on the lens (include
condenser, objective, sensor and collector)
Clean it up
There are stains on the specimen
Clean it up
The position of the condenser is too low
Loosen the condenser’s locking bolt
adjust the condenser to the right
position, then screw down.
There is no coverslip on the specimen
add coverslip
The coverslip is toothick or toothin
Use the standard coverslip

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the image is defocus (low
resolution/contrast)
The specimen is placed inversely
Reverse 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, sensor and collector)
Clean it up
The oil objective didn’t immerse oil
Use immerse oil
There was bubbles in the oil
Eliminate the bubbles
Use a unsuitable oil
Change to the specified one
The size of the aperture diaphragm is
too big
Minify it
There are stains on the incident lens of
the binocular tube
Clean it up
The size of the aperture diaphragm is
too small
Open it up
The position of the condenser is too
low
Adjust the position
One side of the image is dark
The condenser is not in the center of
the field of view\the condenser
inclines
Install the condenser again and
adjust the center carefully by the
centering bolt
The nosepiece is not in the right
position
Turning it until it reach the “clicked”
position
The specimen is floating
Fix it
The image shifts during
focusing
The specimen slips on the stage
Fix it
The nosepiece is not in the right
position
Turn it to the “clicked”position
The image is a little yellow
Not use the blue color filter
Use the blue filter
The brightness is not enough
The size of the aperture diaphragm is
too small
Adjust again
The position of the condenser is too
low
Adjust the position
There are stains on the lens (include
condenser, objective, sensor and
collector)
Clean it up
2. Mechanical Part
Problem
Cause
Solution
The image can not focus when
using high magnification
objective
The specimen is placed inversely
The coverslip is too thick
Turn inversely
Use the standard coverslip (0.17 mm)
The objective and the
specimen touch when change
the low magnification to the
higher magnification
The specimen is placed inversely
The coverslip is too thick
Turn inversely
Use the standard coverslip (0.17 mm)

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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
The brightness is not suitable
Adjust the brightness of the lamp
3. Electrical Part
Problem
Cause
Solution
The lamp can’t light when
turning on the switch
No power
Check the connection of the power
cord
The bulb is not inserted
Insert it correctly
The bulb burns out
Replace it
The lamp burns out suddenly
Use an unstandard lamp
The voltage is too high
Use the specified lamp to replace, if
the problem is not solved, contact
with the service department
The brightness is not enough
Use a substandard lamp
Use the specified lamp
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

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LCD Digital Camera Part
Contents
1Overview.......................................................................................................................................10
1.1 Features..............................................................................................................................10
1.2 Application and Scope........................................................................................................10
1.3 Operating Environment......................................................................................................10
2Parameters and Composition........................................................................................................10
2.1 Parameters..........................................................................................................................11
2.2 Composition .......................................................................................................................11
2.3 Appearance.........................................................................................................................11
3Operation Procedure ....................................................................................................................12
3.1 Connect the power adapter to the camera........................................................................12
3.2 Use the back button to operate the interface............................................................12
3.3 Snap....................................................................................................................................12
4Menu and Functions .....................................................................................................................12
5Operating Instructions ..................................................................................................................13
5.1 White Balance.....................................................................................................................13
5.2 Exposure.............................................................................................................................13
5.3 Line Measurement .............................................................................................................14
5.3.1 Cross Line .................................................................................................................14
5.3.2 Calibration................................................................................................................15
5.3.3 Measurement...........................................................................................................16
5.4 Color Adjustment................................................................................................................16
5.5 Record Video ......................................................................................................................17
5.6 Other Functions..................................................................................................................17
5.6.1 Monochrome ...........................................................................................................18
5.6.2 Flip............................................................................................................................18
5.6.3 Field of View.............................................................................................................18
5.7 Other Settings.....................................................................................................................18
5.7.1 Power Frequency .....................................................................................................18
5.7.2 SD Management.......................................................................................................19
5.7.3 Timed Snap...............................................................................................................19
5.7.4 Language..................................................................................................................20
5.7.5 Factory Reset............................................................................................................20
5.7.6 Software Upgrade ....................................................................................................21
5.7.7 Version .....................................................................................................................22
6Failure analysis and troubleshooting ............................................................................................23

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1Overview
1.1 Features
◆ARM efficient processor.
◆Supports the snapping and video recording of microscope images.
◆With calibration and measurement function.
◆Stable and reliable upgrade function.
1.2 Application and Scope
For Microscopes.
1.3 Operating Environment
1. Ambient temperature: 0 ~ 60℃.
2. Relative humidity: 0% ~ 95%, no condensation.
3. Environment: no vibration, no dust, corrosive gas, flammable gas, oil fog, water vapor, water drop
or salt, etc.
4. Atmospheric pressure: 70 ~ 106kPa.
5. Altitude: ≤5000M.
6. power input 5V.
2Parameters and Composition
1. Basic structure: Camera with 7-inch IPS display.
2. Installation: Mounting on the microscope.
3. Weight: < 2.5 kg.
4. Color: white, black.
5. Surface coating: spray paint.

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2.1 Parameters
Type of sensor
Color CMOS Image Sensor
Sensor size
1/2.8 Inch
Pixel size
2.9 µm (H) × 2.9 µm (V)
Resolution ratio
1844 × 1080
Exposure control
Auto / Manual
Power Frequency
DC / 50Hz / 60Hz
White balance control
Auto WB / Once WB / Manual
Cross-line
4 Sets
Calibration and measurement
Support Calibrating and line measuring
Snap
Button snap / timed snap
Video recording
Supported
Frame rate
30FPS@1844*1080
Image adjusting Parameters
Saturation/ Hue / Brightness / Contrast / Monochrome / Flip vertical / Flip
horizontal/ FOV
FOV
20%-100% of Eyepiece FOV
Storage for snap and record
TF card
Language
English / Chinese
Firmware Software Update
Supported
Connecting way
Mounted to Microscope dovetail
Overall dimensions
182mm*125mm*85mm
2.2 Composition
◆7 inch camera
◆5V/1A power adapter
2.3 Appearance

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3Operation Procedure
Before installing the camera, make sure that all equipment listed in 2.2 is included in the package.
3.1 Connect the power adapter to the camera
Insert the power adapter of 5V/1A into the power port behind the camera. After power on, the
red light will light up. Press the power button at this time, the indicator light will change from red to
green, and the camera will start up.
3.2 Use the back button to operate the interface
Use the back button to operate the camera functions and adjust the camera parameters. After
modifying the parameters, exit the interface to save. In the upper left corner of the screen, "Param.
saved " appears. This is shown in Figure 3-1.
Figure 3-1
3.3 Snap
1.The snap button is on the right side of the camera, above the power button. Press it to capture
the current image on the screen and store it in the SD card.
2.The screen shows "Take Successfully", which means that the picture has been taken successfully.
This is shown in Figure 3-1.
Figure 3-2
Warning: Disconnect the power supply if the equipment is not used for a long time.
4Menu and Functions
After turning on the power and pressing the power button, wait for the screen to light up. At this
point, press the MENU key to call out the menu. As shown in Figure 4-1. The position of the current
cursor (that is, the position of the highlighted icon) is the white balance function option.
Press ↑↓ for function selection, press →to enter the sub-menu interface of the corresponding
functions, press MENU to hide the interface, and save all parameters that have been modified.

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Figure 4-1
5Operating Instructions
5.1 White Balance
After entering the white balance menu, the default option is "Auto White Balance", as shown in
Figure 5-1.
When the effect of automatic white balance is not ideal due to the difference of color temperature
between different light sources, manual white balance can be used to adjust the parameters of color
temperature, R, G and B respectively. This is shown in Figure 5-2.
Figure 5-1 Figure 5-2
5.2 Exposure
After entering the exposure menu, the default option is "Auto exposure", as shown in Figure 5-3.
Under automatic exposure, you can adjust the target "value" to adjust the degree of exposure. In manual
exposure, you can also adjust the exposure by adjusting the value of exposure " time ". As shown in

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Figure 5-4.
Figure 5-3 Figure 5-4
5.3 Line Measurement
This menu includes Cross Line, Calibration and Measurement. As shown in Figure 5-5.
Figure 5-5
5.3.1 Cross Line
Four groups of crossline are provided in red, blue, green and white colors. You can choose
according to your requirements.
Enter the Cross Line menu, as shown in Figure 5-6. "ID" refers to the number of each group of
crossline. "Display" adjusts whether the reticle is displayed. "X position” and ”Y Position" adjusts the
position of the center point of the reticle.
You can select and press the “Turn off All Crosslines” to close all crosslines.

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Figure 5-6
5.3.2 Calibration
There are default calibration values for this product. However, due to the different objective
standards of the microscope, the calibration value may have errors, so it is suggested to recalibrate. The
following is the calibration process.
1. Calibration requires a micrometer. Put the micrometer on the object platform and adjust the
microscope so that the micrometer scale is clearly displayed on the screen. In order to facilitate
calibration, it is suggested to rotate the camera so that the micrometer is placed horizontally in the
screen without being blocked by the menu.
2. After entering the Calibration menu, it is shown in Figure 5-7.
Figure 5-7
3. Adjust the positions of the starting and ending points of calibration to make the calibration line
coincide with the micrometer scale and try to select the length containing most possible multiple scales,
so as to make the measurement more accurate.

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Figure 5-8
4. The minimum range of the selected micrometer is 0.01 mm (10 micron). Figure 5-8 shows the
image under a tenx objective lens. At this time, the "magnification" is set to "10X", the "unit" is
marked as "μm", and the “length” is set to "40".
5. After adjusting the parameters, exit the calibration interface, and the calibration is completed.
5.3.3 Measurement
The image needs to be calibrated before it can be measured. And the calibration ruler of different
magnification is different, so it needs to be calibrated separately under different objective lenses.
Enter the Measurement menu. Select the measurement magnification, adjust the starting and ending
point, and the measurement length is displayed at the bottom in real time, as shown in Figure 5-9.
Changes in the field of vision did not affect the measurements.
Figure 5-9
5.4 Color Adjustment
After entering the color adjustment menu, as shown in Figure 5-10, Saturation, Hue, Brightness and
Contrast can be adjusted to make the picture reach the required level. In order to facilitate the color
adjustment, the "Color Value Reset" option is added in the menu. When selected and pressed, all the
color values in the menu will be restored to the default value.

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Figure 5-10
5.5 Record Video
Before recording the video, you should check whether to insert an SD-CARD with a FAT32 file system
and free space. You cannot take a photo during the recording process. The recording time is shown in
Figure 5-11.
00:00:00
Figure 5-10
5.6 Other Functions
The menu includes functions of Monochrome, Flip vertical, Flip horizontal and FOV. The numerical
option can be adjusted by ←→ key, and the switch options can be opened and closed by →key. After
the adjustment is completed and the main menu is closed, the function states will be saved. The function
states will be retained when the next boot is started. As shown in Figure 5-12.
Figure 5-11

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5.6.1 Monochrome
The function produces visual images in varying tones of a single color (such as gray)
5.6.2 Flip
This function is divided into vertical flipping and horizontal flipping.
5.6.3 Field of View
This function can adjust the range of observation field. Use the ←→ key in the menu to adjust the size. When
the menu is not displayed, press ↑↓ key to adjust, and 70% similar signs will appear in the upper left corner.
5.7 Other Settings
This menu contains Power Frequency, SD Management, Timed Snap,Language, factory Reset, Software
Upgrade, Version. As shown in Figure 5-13.
Figure 5-12
5.7.1 Power Frequency
CMOS detectors have a rolling curtain effect that causes flicker problems, which can be resolved by
capturing a line of pixels as an integer (n) times the flicker period. Among them, 60Hz in North America
and 50Hz in Europe. As shown in Figure 5-14.
1. DC (DC): for DC (DC) light source, there is no light fluctuation, so there is no need to
compensate the flashing light source.
2. AC (50Hz): radio AC (50Hz) to eliminate the dark strip of the lamp curtain caused by the 50Hz
fluorescent lamp.

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3. AC (60Hz): radio AC (60Hz) to eliminate the dark strip of the lamp curtain caused by 60Hz
fluorescent lamp.
Figure 5-13
5.7.2 SD Management
After inserting the SD card, the remaining space and total space of the SD card can be seen in
"Available Space", as shown in Figure 5-15.
If "0.00 Gb /0.00 Gb" as shown in Figure 5-16, the SD card was not successfully mounted, please
try to reinsert it.
Enter "Format SD-CARD" to format, as shown in Picture 5-17. Please back up important files on
your computer before formatting SD-CARD.
Figure 5-14 Figure 5-15 Figure 5-16
5.7.3 Timed Snap
"Hours, minutes and seconds" refers to the time interval of timed snap, and "counts" refers to the
number of timed snap. After setting the parameters, move the cursor to "Timed Snap Start" and press

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→to start timed snap. At this point, the number jumps below. This is the number of photos that have
been successfully taken so far. As shown in Figure 5-18.
If the available space of SD card is insufficient during the process of timed snap, it will exit.
Figure 5-17
5.7.4 Language
The current version can switch between Chinese and English. As shown in Figure 5-19.
Figure 5-18
5.7.5 Factory Reset
Press →key to reset the menu settings to factory settings. This is shown in Figure 5-20.