BestScope BS-6012 Series User manual

Version: V1.0
BS-6012 Series
Upright Metallurgical
Microscope
Instruction Manual
This instruction manual is for the operation guide, troubleshooting and
maintenance to the BS-6012 Series Upright Metallurgical Microscope. Please
study this manual thoroughly before operating, and keep it with the
instrument. The manufacturer reserves the rights to the modifications by
technology development. On the basis of operation ensured, technical
specifications may be subject to changes without notice.

BestScope International Limited
Contents BS-6012 Series
Before Use
1. Components............................................................................................................................... 1
2. Assembling................................................................................................................................. 5
2-1 Assembling Scheme ......................................................................................................... 5
2-2 Assembling Steps ............................................................................................................. 7
3. Operation................................................................................................................................. 11
3-1 Set Illumination.............................................................................................................. 11
3-2 Select the Light Path ...................................................................................................... 12
3-3 Adjust the Bracket (For Reflected Illumination) ............................................................. 12
3-4 Adjust Focusing.............................................................................................................. 12
3-5 Adjust the Focusing Tension .......................................................................................... 13
3-6 Adjust the Diopter.......................................................................................................... 13
3-7 Adjust the Interpupillary Distance ................................................................................. 14
3-8 Center the Condenser (For Transmitted Illumination) ................................................... 14
3-9 Adjust the Field Diaphragm........................................................................................... 15
3-10 Adjust the Aperture Diaphragm .................................................................................. 15
3-11 Adjust the Stage........................................................................................................... 17
3-12 Use the Eye-cap ........................................................................................................... 17
3-13 Adjust the Oblique Illumination (For Reflected Illumination) ...................................... 17
3-14 Use the Color Filter ...................................................................................................... 18
3-15 Use the Simple Polarizer Device................................................................................... 18
3-16 Assemble and Use the TV Device................................................................................. 19
3-17 Use the Digital Head.................................................................................................... 19
3-18 Replace the Fuse.......................................................................................................... 20
4. Troubleshooting ....................................................................................................................... 21

BestScope International Limited
Before Use BS-6012 Series
1. Operation Notice
(1) As the microscope is a high precision instrument,
always operate it with care, and avoid physical shake
during the operation.
(2) Do not expose the microscope in the sun directly, either
not in the high temperature, damp, dust or acute shake.
Make sure the worktable is flat and horizontal. Following
environment is required when operating: Indoor
temperature: 5℃～40℃, Max relative humidity: 80%.
(3) When moving the microscope, use one hand to hold its
arm①and the other hand to hold its front base②, and
lay it down carefully (See Fig. 1).
★It will damage the microscope by holding the stage,
focusing knob, head or light source when moving.
(4) When working, the surface of light source will be very
hot. Make sure there is enough room for the heat
dissipating around the light source.
(5) Connect the microscope to the ground to avoid
lightning strike.
(6) For safety, make sure the power switch③is at “O” (off)
and power it off before replacing the fuse (See Fig. 2).
(7) Wide voltage range is supported as 100~240V.
Additional transformer is not necessary. Make sure the
voltage is in this range.
(8) Use the special wire supplied by our company.
(9) All the power OFF devices have been set in the position
where is easy to operate.
2. Maintenance
(1) Wipe the lens gently with a soft tissue. Carefully wipe off the oil marks and fingerprints on
the lens surfaces with a tissue moistened with a small amount of 3:7 mixture of alcohol and
ether or dimethylbenzene.
★As the alcohol and ether is flammable, don’t place these chemical near to fire or fire source.
For example, when turning on/ off the electrical device, please use these chemicals in a
ventilated place.
(2) Don’t use organic solution to wipe the surfaces of the other components. Please use the
neutral detergent if necessary.
(3) If the microscope is damped by liquid when using, power it off immediately and wipe it dry.
(4) Never disassemble the microscope, otherwise the performance will be affected or the
instrument will be damaged.
(5) After using, cover the microscope with a dust cover.
3. Safety Sign
Sign
Signification
The surface gets hot and don’t touch it with bare hand.
Study the instructions before use. Unsuitable operation would lead to person
hurt or instrument faulty.
Fig.1
Fig.2

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Main switch ON
O
Main switch OFF

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1. Components BS-6012 Series
BS-6012 Series Upright Metallurgical Microscope (LED Illumination) Components
Eyepiece
Light Path
Selecting Pole
Inner
Hexangular
Spanner
Stage
Condenser Center
Adjusting Screw
Field Diaphragm
Adjustment Ring
Y-axis Moving
Knob
X-axis Moving
Knob
Fine
Focusing
Knob
Aperture Diaphragm
Adjusting Pole
Field Diaphragm
Adjusting Pole
Analyzer
Slot
Light Adjustment
Knob (Reflected
Illumination)
Coarse
Focusing
Knob
Diaphragm
Centering
Screw
Filter Slot
Polarizer
Slot
Tension
Adjustment
Knob

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BS-6012 Series
Diopter
Adjustment
Ring
Nosepiece
Fuse
Power
Outlet
LED Light
Source Group
(Transmitted
Illumination)
Light Adjustment
Knob (Transmitted
Illumination)
Coarse
Focusing
Knob
Focusing Bracket
Group
Reflected
Illuminater
Body
Hinged
Trinocular Head
Oblique
Illumination
Pole
Random
Upper Limit
Knob
Power
Switch
LED Light
Source Group
(Reflected
Illumination)
Fine Focusing
Knob
Condenser
Up-down
Adjustment knob
Condenser
Metallographic
Objective
Diaphragm
Centering
Screw

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BS-6012 Series
BS-6012 Series Upright Metallurgical Microscope (Halogen Illumination) Components
Eyepiece
Light Path
Selecting Pole
Inner
Hexangular
Spanner
Stage
Condenser Center
Adjusting Screw
Field Diaphragm
Adjustment Ring
Y-axis Moving
Knob
X-axis Moving
Knob
Fine
Focusing
Knob
Aperture Diaphragm
Adjusting Pole
Field Diaphragm
Adjusting Pole
Analyzer
Slot
Light Adjustment
Knob (Reflected
Illumination)
Coarse
Focusing
Knob
Diaphragm
Centering
Screw
Filter Slot
Polarizer
Slot
Tension
Adjustme
nt Knob

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BS-6012 Series
Diopter
Adjustment
Ring
Nosepiece
Fuse
Power
Outlet
Light Adjustment
Knob (Transmitted
Illumination)
Coarse
Focusing
Knob
Focusing
Bracket Group
Reflected
Illuminator
Body
Hinged
Trinocular Head
Oblique
Illumination
Pole
Random Upper
Limit Knob
Power
Switch
Halogen Light
Source Group
(Reflected
Illumination)
Fine Focusing
Knob
Condenser
Up-down
Adjustment knob
Condenser
Metallographic
Objective
Diaphragm
Centering
Screw
Halogen Light
Source Group
(Transmitted
Illumination)

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2. Assembling BS-6012 Series
2-1 Assembling Scheme
Following is the Assembling Scheme, and the numbers denote the assembling order.
★Before assembling, make sure there is no dust, dirt or other matters to affect the
assembly. Assemble carefully and do not scrap any part or touch the glass surface.
BS-6012 Upright Metallurgical Microscope (LED Illumination)
①
②
③
④
⑤
⑥
⑦
⑧
Reflected
Illuminator
LED Light Source
Group (Transmitted
Illumination)
Power Cord
Body
Stage
Condenser
Hinged Trinocular Head
Objective
Eyepiece

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BS-6012 Series
BS-6012 Upright Metallurgical Microscope (Halogen Illumination)
①
③
④
⑤
⑥
⑦
⑧
⑨
Reflected Illuminater
Halogen Light
Source Group
(Transmitted
Illumination)
Power Cord
Body
Stage
Condenser
Hinged Trinocular Head
Objective
Eyepiece
Halogen
Lamp
Halogen Lamp
①
②
Halogen Light
Source Group
(Reflected
Illumination)
②

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BS-6012 Series
2-2 Assembling Steps
2-2-1 Assemble and Replace the Halogen Bulb
◎For Transmitted Illumination
When assembling the halogen bulb for transmitted
illumination, hold the bulb①with clean glove or
tissue and fully insert the pins②into the
receptacles③of the bulb holder. Make sure the bulb
is vertical (See Fig. 3).
◎For Reflected Illumination
(1) Loosen the lock screw①with the M4 inner
hexangular spanner which is equipped with the
microscope, to take off the cover group (See Fig. 4).
(2) Open the bulb lock sheet②, hold the bulb③
with clean glove or tissue and fully insert the pins④
into the receptacles⑤. Make sure the bulb is vertical
(See Fig. 5).
(3) Loosen the bulb lock sheet②to lock the bulb,
and put on the cover group.
★Before replacing, cut off the main power supply,
and wait until the bulb and bulb holder cool
down.
★Don’t touch the bulb with fingers. If there is any
fingerprint on it, clear it with clean tissue.
★Bulb selected only: 12V/50W HAL Bulb (Philips
7027).
2-2-2 Assemble the Light Source Group
◎For Transmitted Illumination (LED light source)
Match the guide pins①and power supply pins②of
light source group with the guide receptacles③and
power socket④of base, and push the light source
group into the base thoroughly. (See Fig. 6)
Fig.3
Fig.4
Fig.5
Fig. 6

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BS-6012 Series
◎For Transmitted Illumination (Halogen light
source)
(1) Match the guide pins①of light source group with
the guide receptacles②of base, and push the light
source group into the base thoroughly. (See Fig. 7)
(2) Insert the plug③of light source group into the
socket④of the microscope body.
◎For Reflected Illumination
(1) Fully loosen the lock screw①of the reflected
illuminator. (See Fig. 8)
(2) Push the light source group base②into the
reflected illuminator light source base③thoroughly,
then lock the lock screw①.
(3) Insert the aviation plug④of the light source
group into the aviation socket⑤of the microscope
body. (See Fig. 9)
★The installation and connection of reflected
illumination light source group (LED light source) is
same as the halogen light source.
2-2-3 Assemble the Stage
(1) Fully loosen the lock-screw①on the stage. (See
Fig. 10)
(2) From a rear area of the rounded hole center on
the bracket, carefully ring the two “V” buttons on the
bottom of the stage into the “V” rounded groove②,
then screw down the lock screw①.
Fig.10
Fig. 7
Fig. 8
Fig. 9

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BS-6012 Series
2-2-4 Assemble the Condenser
(1) Rotate the coarse focusing knob①to raise stage
to the highest. (See Fig. 11)
(2) Rotate the condenser up-down knob②to move
the condenser bracket to the lowest.
(3) Loosen the condenser lock-screw③fully.
(4) Swing out the front lens of condenser④with the
scale forward. Make the lock screw⑤behind the
condenser in alignment with the groove⑥of the
condenser stand. Push the condenser④into the
innermost of stand.
(5) Screw down the condenser lock-screw③, and
raise the condenser④to the highest position with
the condenser up-down knob②.
2-2-5 Assemble the Epi-Illuminator
(1) Loosen the lock screw①of the Epi-Illuminator
fully. (See Fig. 12)
(2) From a little right position of the rounded hole
center on the microscope body, insert the coattail
interface on the bottom of epi-illuminator into the
hole, with a little left inclined, and then screw down
the lock screw①.
2-2-6 Assemble the Head
(1) Loosen the head lock-screw①fully. (See Fig. 13)
(2) From a little right position of the rounded hole
center on the epi-illuminator, insert the coattail
interface on the bottom of head into the hole, with a
little left inclined. Keep the two eyepiece tubes
forward, and then screw down the lock screw①.
2-2-7 Assemble the Objective
Rotate the coarse focusing knob to lower the stage.
Then install the objectives into the nosepiece from
the lowest magnification to the highest in a clockwise
direction (See Fig.14).
Fig.12
Fig.11
Fig.13
Fig.14

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BS-6012 Series
★Search and focus the sample by low magnification
objective (5X or 10X) when operating. Then get
change to the high magnification ones according
to the observation requirements.
★When replacing the objective, rotate the
nosepiece until it sounds “ka-da”, to make sure
the objective is in the center of the light path.
2-2-8 Assemble the Eyepiece
(1) Take down the cover of eyepiece tube①. (See Fig.
15)
(2) Insert the eyepiece②into the eyepiece tube,
until touch the bottom.
2-2-9 Connect Power Cord
(1) Make sure the main power switch is at “O” (OFF)
position. (See Fig. 16)
(2) Insert one end of power cord①into the power
socket②of the microscope.
(3) Insert the other end of power cord①into the
power supply socket.
★Don’t use strong force when the power cord is
bended or twisted, otherwise it will be damaged.
★Use the special wire supplied by our company. If
it’s lost or damaged, choose one with the same
specifications.
★Connect the power cord appropriately to make
sure the instrument is connected to ground.
Fig.15
Fig.16

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3. Operation BS-6012 Series
3-1 Set Illumination
◎For Reflected Model
(1) Put through the power and turn on the main
power switch to“—” (ON).
(2) Adjust the light adjustment knob①until the
illumination is comfortable for observation. Rotate
the light adjustment knob①clockwise to raise the
brightness. Rotate the light adjustment knob①
counterclockwise to lower the brightness. (See Fig.17)
◎For Transmitted&Reflected Model
(1) Put through the power and turn on the main
power switch to“—” (ON).
(2) For transmitted illumination, rotate the light
adjustment knob①counterclockwise until a sound
of “DiDa”is heard, turn on the down illumination
light source, then adjust the light adjustment knob①
until the illumination is comfortable for observation.
(See Fig. 18)
Rotate the light adjustment knob①anticlockwise to
raise the brightness. Rotate the light adjustment
knob①clockwise to lower the brightness, the light
source is shut down until a sound of “DiDa”is heard.
(3) For reflected illumination, rotate the light
adjustment knob②clockwise until a sound of
“DiDa”is heard, turn on the up illumination light
source, then adjust the light adjustment knob②until
the illumination is comfortable for observation. (See
Fig. 19)
Rotate the light adjustment knob②clockwise to
raise the brightness. Rotate the light adjustment
knob②counterclockwise to lower the brightness,
the light source is shut down until a sound of “DiDa”
is heard.
★Use the bulbs in the low-voltage state can extend
the bulb life.
Fig.18
Fig.19
Fig.17

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BS-6012 Series
3-2 Select the Light Path
For trinocular head, the light path selecting pole①
controls the light-energy ratio of binocular and
trinocular. When the light path selecting pole①is
pushed to the innermost, all the light will enter the
binocular head. When it is pulled to the outmost,
binocular and trinocular can be observed
simultaneously. Usually, push the light path selecting
pole to the innermost for binocular observation,
while pull it to the outmost for trinocular observation
(TV&Photography). (See Fig. 20)
3-3 Adjust the Bracket (For Reflected Illumination)
(1) It can be observed at the normal position (Factory
Position) for the specimen which is below 27mm in
height (See Fig. 21).
(2) When observing the specimen which is
27mm-33mm in height, loosen the bracket lock
screw①with the inner hexangular spanner which is
equipped with the microscope. Move the bracket
down to the appropriate position, then lock the
bracket lock screw①.
★Hold the bracket when loosen the lock screw①,
to avoid the bracket falling.
3-4 Adjust Focusing
(1) Put the slice on the stage, and hold it down with
the clip. Shift the 5X objective into the light path.
★Make sure the observation surface is vertical with
the objective when placing the sample. Use
plasticene if necessary.
(2) Loosen the random upper limit knob①, then
observe the right eyepiece with the right eye. Rotate
the coarse focusing knob②until the image appears
in the view field, then lock the random upper limit
knob①. (See Fig.22)
Fig.20
Fig.21
Fig.22

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BS-6012 Series
★The random upper limit knob can prevent the
objective touching the slice when focusing.
★The random upper limit knob does not react
on the fine focusing knob.
(3) Rotate the fine focusing knob③for clear details.
3-5 Adjust the Focusing Tension
If the handle is very heavy when coarse focusing or
the specimen leaves the focus plane after focusing, or
the stage declines itself, please rotate the tension
adjustment ring①according to the arrowhead
pointed direction to adjust the focusing tension. (See
Fig. 23)
3-6 Adjust the Diopter
After the image is clear in the right eyepiece, observe
the left eyepiece with the left eye, if the image is not
clear enough, rotate the diopter adjustment ring①
until the image is clear (See Fig. 24).
There are ±5 diopters on the diopter adjustment
ring①, and the value aligned with the scale②is
your eye’s diopter. The dot “·” on the left side can
also indicate.
★Remember your eye’s diopter, so that you can use
it next time.
★If both the left and right eyepiece tubes have
diopter adjustment ring, either side can be chosen
as the observation baseline, then adjust the other
side. First, make sure the baseline eyepiece tube
is adjusted to the position of diopter “0”, then
focusing observe.
Fig.24
Fig.23

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BS-6012 Series
3-7 Adjust the Interpupillary Distance
When using two eyes to observe, hold the left and
right bases of prism and rotate them around the axis
to adjust the interpupillary distance, until there is
only one field of view, and is comfortable for
observation. (See Fig. 25)
The dot “·” on the left eyepiece base points to the
scale of the interpupillary distance indicator. The
scale value is the interpupillary distance.
Interpupillary distance adjustable range: 50~76mm.
★Remember your eyes’ interpupillary distance, so
that you can use it next time.
3-8 Center the Condenser (For Transmitted
Illumination)
(1) Rotate the condenser up-down knob①to raise
the condenser to the highest position. (See Fig. 26)
(2) Rotate the spanner②to move the front lens into
light path.
★Move the front lens of condenser into light path
when the objective is beyond 20X.
(3) Move the 20X objective into light path and focus
the specimen.
(4) Rotate the field diaphragm adjustment ring③to
open the field diaphragm to the smallest position,
then the image of field diaphragm can be observed
through eyepiece.
(5) Rotate the condenser up-down knob to adjust the
image to the clearest.
(6) Adjust the condenser center adjusting screw④to
put the image to the center of the field of view.
(7) Open the field diaphragm gradually. If the image is
in the center all the time and inscribed to the field of
view, it shows the condenser has been centered
correctly. (See Fig. 27)
(8) In actual use, enlarge the field diaphragm a little,
to make its image circumscribed to the field of view.
Fig.27
Fig.25
Fig.26

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BS-6012 Series
3-9 Adjust the Field Diaphragm
By limiting the diameter of light entering the
condenser, the field diaphragm can prevent other
light and strengthen the image contrast. When the
image is just on the edge of the field of view, the
objective can perform best and obtain the clearest
image.
◎For Transmitted Illumination
Rotate the field diaphragm adjustment ring③in
clockwise, to enlarge the field diaphragm; otherwise,
to decrease it in counterclockwise. (See Fig. 26)
◎For Reflected Illumination
(1) Push the field diaphragm adjustment pole①to
the innermost, to minimize the field diaphragm (See
Fig. 28).
(2) The image of field diaphragm can be observed in
the view field through eyepiece.
(3) Adjust the two field diaphragm centering
screws②on the both sides of illuminator with the
hexagon spanner, until the image is in the center.
(4) Open the field diaphragm gradually, if the image
of field diaphragm is inscribed with the field of view,
then the field diaphragm is centered correctly (See
Fig. 27).
(5) In actual use, enlarge the field diaphragm a little,
to make its image circumscribed to the field of view.
3-10 Adjust the Aperture Diaphragm
The aperture diaphragm decides the numerical
aperture of the illumination system. If the N.A. of
illumination system matches with the N.A. of the
objective, it can obtain better resolution and contrast,
and increase the depth of field.
Fig.28

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BS-6012 Series
Since the contrast of microscopic samples is usually
low, in actual use, it is advised to adjust the
condenser aperture diaphragm to be 70%-80% of the
N.A. of objective. In actual use, according to the
contrast of samples, ajust the aperture diaphragm, to
obtain comfortable observation and good contrast.
◎For Transmitted Illumination
Adjust the aperture diaphragm adjusting ring③to
control the size of diaphragm. Take off the eyepiece if
necessary, observe from the eyepiece tube and adjust
the aperture diaphragm adjusting ring③until see
the image as shown in Fig. 29, to adjust the
proportion (see Fig. 29&30, ①in Fig. 29 is the image
of aperture diaphragm, and ②is the edge of
objective).
Use of scale: Set the scale of condenser N.A. to the
80% value of objective④N.A.
For example, when use 50X objective (N.A. 0.55), set
the scale of aperture diaphragm to 0.55 x 0.8=0.44.
◎For Reflected Illumination
The changing direction of the aperture diaphragm is
as same as the field diaphragm, adjust it by the
aperture diaphragm adjusting pole①. Adjust the two
aperture diaphragm centering screws②on the both
sides of illuminator with the hexagon spanner, to
move the image of aperture diaphragm to the center
of the view field. The eyepiece can be taken off when
it’s necessary to observe from the tube. Adjust the
aperture diaphragm adjusting pole①until see the
image as shown in Fig. 29, to adjust the proportion
(See Fig. 29&31).
★The aperture diaphragm of reflected illuminator is
centered in factory setting, and usually the users do
not need to adjust it.
Fig.30
Fig.31
Fig.29