Biological Microscope
BMS C1 series
User Manual
This manual is written for biological microscope BMS C1. For safety, exerting best performance of
the instrument, and making you familiar with the instrument entirely, we strongly recommended that
you carefully read this manual before using the microscope.
Contents BMS C1
Use Notices
1 Name of Components …………………………………………… 1
2 Installation ………………………………………………………… 2
2.1 Installing Illustration………………………………………………………… 2
2.2 Installing Steps ……………………………………………………………… 3
3 Adjustment & Operation …………………………………………… 7
3.1 Adjustment System Installing Illustration ………………………………… 7
3.2 Operation ……………………………………………………………… 9
4 Technical Specifications …………………………………………… 12
5 Configuration Table ………………………………………………… 13
6 Trouble Shooting …………………………………………………… 13
Use Notices BMS C1
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. If the bacterium solution or the water splash to the stage, objective or viewing tube, pull out the
power cord at once, and wipe up the microscope. Otherwise, the instrument will be damaged.
5. When running, the lamp house and nearby parts will be very hot. Please ensure there is enough
cooling room for them.
6. Make sure the instrument is earthed, to avoid lighting strike.
7. For safety, be sure the main switch is in “O”(off) state before replace the halogen lamp or the fuse,
then cut off the power, and do the operation after the lamp bulb and the lamp house completely
cool.
8. 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.
9. 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.
1. NAME OF SPARE PARTS BMS C1
bino
objective
Eyepiece
Binocular viewing head
Nosepiece
Objective
Body
1
①
②
2． Installation BMS C1
2.1 Installing Illustration
The following shows the installing order of the spare parts. The number express the installing process.
before the installing ,make sure there is no dust and stain on the spare parts . No marks by
outside force on the surface of the spare parts or glass .
Keeping the hexagon- spanner well , when change the spare parts , you will use it .
Body
Objective
Binocular Viewing Head
10x Objective
④
③
2
Cable Wire
BMS C1
2. Installing Setps
Picture 1
3
Picture 3
Picture 2
2.2.1 Install the binocular
viewing head (picture No 1-2)
Insert the binocular viewing head
in the head of the body , turn to the
right place ,then fix up it by bolts.
2.2.2 Install the eyepiece
(picture No.3-4)
Insert the eyepiece in the eyepiece
tube till end. No.4 picture shows the
station after the installing .
Picture 4
BMS C1
Picture 6
Picture 5
Picture 7
4
2.2.3 2.2.3 install the objective
(picture No.5-6)
1: Adjust the coarse & fine focus
knob, till the mechanical stage to
the low limited place.
2. Screw down the objective to
nosepiece one by one.
Clean the objective frequently.
At first, use the 10X objective to
looking for image, then change
another one.
Turn the objective till hear the
“kaca” sound, make sure the
objective enter the objective
center.
2.2.4 Install the filter (picture 7)
1. Swing out the condenser holder①
2. Put the filter in the holder. Then
swing the holder in.
BMS C1
2.2.5 Link cable wire (picture NO.8-9-10 )
★ Do not push strong force on the cable
wire because the bending cable is easily be
destroyed.
1. Before linking the cable, make sure the
switch① is cut off.
2 Insert the electronic plug ② in the socket
③ safely .
3: Insert ④ on ⑤ .
★ Use the cable wire supplied by BMS
company. when destroyed make the
choice of same type.
★ The machine adopt the wide voltage,
can work under the voltage of
230V/50Hz.
2.2.6 change the fuse (picture9&10)
Before change the fuse, make sure that the
switch ① is cut off, swing out the
⑥,change new fuse, then swing back into
the ⑦.
5
Picture 8
Picture 9
Picture 10
Picture 11
BMS C1
picture 12
2.2.8 install & change the lamp
（ picture 11、12、13）
Please use the designated 6V/20w
halogen lamp.
1:Pull out the condenser set ①.
1. Use the pledge wrap the lamp ①, put
the lamp pin into the socket ③.
2. Change the lamp during usage.
Make sure the switch is cut off & all
parts around lamp are cool down.
Insert the lamp carefully, do not touch
the lamp with finger &strong force.
Insert the condenser opposite direction
as picture .
6
Picture 13
3. adjustment &operation BMS C1
3.1 adjustment system installing illustration (picture No.14-15)
left fine focus knob
left coarse focus knob
7
interpupillary distance
showing
Eye viewing adjust ring
light adjusting switch
Picture 14
locking knob
condenser adjustment knob
BMS C1
T ension Adjustment Collar
Right Fine Focus Knob
Main Switch
Portrait Adjustment Knob
Lateral Adjustment Knob
8
15
Right Coarse Focus Knob
Aperture Diaphragm
Lever
BMS C1
3.2 Operation
3.2.1 Adjusting the Illumination (Fig.20,21)
1. Connect the power, turn on the main switch (figure 15) to
“-”(on).
2. Turning the brightness adjustment knob anti-clockwise, the
voltage raise, and the brightness strengthen; turning it
clockwise, the voltage decline, and the brightness weaken.
Using the lamp in a low voltage condition, will prolong the
use life.
3.3.2 Placing Specimen (Fig.22)
1. Place the slide on the mechanical stage. Use the stage
clips to clamp the slide gently.
2. Turn the portrait and lateral adjustment knob of the
mechanical ruler, move the specimen onto the required
position.
Be careful when changing the objective. If you finish
the observation with the short working distance
objective, and want to change another one, be careful
of not letting the objective touch the specimen.
3.3.3 Focusing (Fig.23)
1、Use the 10×objective focus, to avoid the objective touch with
the specimen, you should raise the mechanical stage at first,
let the specimen close to the objective, then slowly separating
them to focus.
The operator can converse turn the coarse focus knob① to get
the specimen down ,and search images in the 10×ocular
simultaneously, then use the fine knob② to focus. At this
moment, you can replace other magnification objectives safely,
and focus without the risk of destroying the specimen.
If you need to fix the stage on a vertical position
to make the observation become more convenience, take
use of the locking set.
9
Fig.20
Fig.22
Fig.21
Fig.23
BMS C1
3.3.4 Adjusting the Condenser(Fig.24)
Turn the condenser focus knob to shift the condenser. It
needs to raise the condenser when using the high
magnification objective, and to decline when using the
low magnification one.
The center of the condenser and the light axes
of the objective are coaxial. It has been
adjusted before leaving factory, so the user
needn’t to adjust them by self.
The highest position of the condenser has been
adjusted too. It also needn’t any user’s
operation.
3.3.5 Adjusting the Aperture Diaphragm
(Fig.25)
Turn the Aperture Diaphragm Lever①，to adjust
the aperture size.
Aperture Diaphragm is designed for adjusting
the aperture size, not for adjusting
brightness.
Generally, reducing the diaphragm opening to
70- 80% of the N.A. value of the respective
objective will provide an image of acceptable
quality. If you want to observe the image of
the aperture diaphragm, remove one eyepiece
and look through the tube. You will see a dark
circle encroaching on the bottom of the tube.
3.3.6 Adjusting the Interpupillar Distance
(Fig.26)
The interpupillar distance range:55mm～75mm.
When observing with two eyes, hold on the left and
right prism holder, turn around the axis, adjust the
interpupillar distance until the left and right fields
of view coincide completely.
10
Fig.24
Fig.25
Fig.26
BMS C1
3.3.3 Adjusting the Diopter(Fig.27)
1. Observe the right ocular tube with your right eye. Turn the
Coarse & Fine Focus Knob to focus the specimen.
Observe the left ocular tube with your left eye. If not in
focus just adjust the Diopter Ring① to make it in focus.
★
the range of Diopter Ring is ±5, as the value
align the reticle② of the ring.
3.3.9 Adjusting the Tension Adjustment
Collar(Fig.28)
The tightness of the tension adjustment collar has
adjusted before leaving factory, if finding it’s
loosing (the mechanical stage drop itself because
of deadweight), please turning the tension
adjustment collar① until the tightness is in
order. Turn it along the direction show in the
picture, the Coarse Focus Knob② will become
tighter. Turn anti-direction will become loosen.
If the mechanical stage drop itself, or even lose
focus just after adjusting the fine focus knob③.
Mean the tightness of the Coarse Focus Knob② is too
low. You should turn the tension adjustment collar
along the direction show in the picture to make it
tighter.
11
图 27
Fig.28
4．Technical Specifications BMS C1
一、Main specifications
Mechanism Tube
Length
160mm
Viewing Head Compensation Free Head, Inclined at 30, Interpupillar distance: 55-75mm
Eyepiece View field line 18mm
Nosepiece
Forward Quadruple Nosepiece
Objective Achromatic :4×，10×，40×、100×
Focus System
Coaxial Coarse and Fine Focusing System, Sensitivity and Graduation of Fine
Focus: 0.002mm. Coarse & fine focus range:23mm
Condenser Abel, NA=1.25
Stage Double layer mechanical stage, area: 140×140mm, movement range: 75×50mm
Lamp-House halogen lamp 6V/20W
Eyepiece & Objective
1. Objective
Magnification
Numerical Value
Aperture
Diaphragm(N.A）
Thickness of
Cover Slip(mm)
Focus(mm)
Working
Distance（mm）
Working
Mode
4× 0.10 0.17 31.05 37.5 Dry
10× 0.25 0.17 17.13 7.316 Dry
40× 0.65 0.17 4.65 0.632 Dry
100× 1.25 0.17 2.906 0.198 Oil
2. Eyepiece
Sort Magnification Focus(mm) View field line(mm)
Plan Eyepiece 10× 24.95 Ø18
3. Total magnification with Objective plus Eyepiece：
Objective 10× 10× 10× 10×
Eyepiece 4× 10× 40× 100×
Total magnification 40× 100× 400× 1000×
12
5．Configuration table BMS C1
Name of
Components
Specifications Amount
Standard
Equipped
Main Frame 1 〇
Double Layer Mechanical Stage 1 〇
Body
Condenser Bracket 1 〇
Observation System Compensation Free binocular Head 1 〇
Condenser N=1.25 Abbe Condenser 1 〇
Nosepiece
Quadruple Nosepiece
1 〇
6V/20W Halogen Lamp 1 〇
Spare Lamp 2 〇
Lamp-house
Spare Fuse BGX-1-20(0.5A) 2 〇/2
Eyepiece Plan Eyepiece 10× 2 〇
Achromatic Objective 4× 1 〇
Achromatic Objective 10× 1 〇
Achromatic Objective 40× 1 〇
Objective
Achromatic Objective 100×（Oil,
Spring ）
1 〇
Condenser
Bright Field Condenser with
Changeable Raster
1 〇
Filter Baby Blue ,Green 1 〇
13
6．Trouble Shooting BMS C1
I. Optical Part:
PROBLEMS REASON FOR PROBLEMS SOLUTION
The nosepiece is not in the
located position
Adjust it into the located
position
The filament Imaging not in
center
Adjusting it to center
1. The edge of the
field of view has
shadow or the
brightness is
asymmetry
Stains on the lens (Condenser,
Objective, Eyepiece）
Wipe up
Stains on the lens (Condenser,
Objective, Eyepiece）
Wipe up
Stains on the specimen Wipe up
2. Stains in View
Field
The Condenser position is too
low.
Loose the condenser locking
bolt. Adjust the position of
condenser. Screw down the locking
bolt.
No cover slip on the specimen Cover the slip
The cover slip is too thick or too thin.
Use standard cover
slip.Thickness:0.17mm
The specimen is reversed Reverse back.
The dry objective is stained
with oil (Especially 40X)
Wipe up
Stains on the lens (Condenser,
Objective, Eyepiece）
Wipe up
The oil objective is not in oil. Use oil
There is air bubble in oil Remove oil
Not use the appointed oil Use the appointed oil
The opening of Aperture
diaphragm is too large
Properly make it smaller
Stains on the incidence lens in
the binocular drawtube.
Wipe up
The opening of Aperture
diaphragm is too small
Properly make it larger
3. Low image
quality (Low
resolution, low
contrast)
Condenser position is too low Adjust the position
The condenser is not in center of t he
view field, or the condenser is
inclined.
Reinstall the condenser and adjust
the center carefully by using the
condenser adjusting bolt.
The nosepiece is not in the located
position
Turn it into the required
position
4. One side of
image is dark.
The specimen is floating on the
stage.
Reinforce it reliably.
The specimen is floating on the
stage.
Reinforce it reliably.
5. The image moved
when focusing.
The nosepiece is not in the located
position
Turn it into the required
position
6. The image takes
the yellow
slightly.
Not use the color filter. Use the blue filter.
The opening of Aperture
diaphragm is too small
Properly make it larger
Condenser position is too low Adjust the position
7. The bright
degree is not
enough
Stains on the lens (Condenser,
Objective, Eyepiece）
Wipe up
14
BMS C1
II. Mechanical Part:
PROBLEM REASON FOR PROBLEM SOLUTION
1. Can’t focus when use
high magnification
objective.
Slice put reversed.
Cover slice is too thick.
Reverse back
Using standard cover slice.
Thickness: 0.17 mm
2. Touch the slice
when switch the
objective from low
magnification to
high one.
Slice put reversed.
Cover slice is too thick.
Reverse back
Using standard cover slice.
Thickness: 0.17 mm
3. The specimen move
not flowing
The slice holder not nip the
slice firmly.
Make it firmly
4. Two eyes image not
in superposition
The interpupillar distance is not
correct
Adjust the interpupillar
distance correctly
The diopter is not right
Adjust the diopter according
your sight
5. The eyes are
uncomfortable
6. The bright degree is not
properly
Adjust the voltage of bulb.
III. Electric Part:
PROBLEM REASON FOR PROBLEM SOLUTION
No power supply
Check the power cord, and
connect them exactly
the installation of the bulb is wrong Install the bulb correctly
1. The lamp can’t
light
The bulb burn out Change a new bulb
2. The bulb burn out
in a high frequency
Not use a appointed lamp
High voltage
Use a appointed lamp. If the
circumstance still not change,
please contact the maintenance
part.
3. The rightness degree
is not enough
Not use a appointed lamp
Low voltage
use a appointed lamp
Turn up the voltage
The bulb is going to spoil Change the bulb
4. The light glimpse
The power cord have a poor
contact
Check the power cord, and
connect them exactly
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