Stalwart STM-2030B Reference manual

Biological Microscope
Model Number:STM-2030B/T
Introduction Manual
This instruction manual is for STM-2030B Binocular and STM-2030T Trinocular biological microscope.
To insure safety and obtain optimum performance and familiarize yourself fully with the use of this
microscope. We recommend that you read the manual thoroughly before operating the microscope,
Attain this manual instruction in an easily accessible place near the microscope for the further reference.

1
CONTENTS
User Notice................................................................. 2
1.Components.............................................................. 4
2.Assembly ................................................................. 5
2.1 Assembly Diagram ................................................ 5
2.2 Assembly Steps .................................................... 6
3．Adjustment & Operation ........................................... 10
3.1 Adjustment Sets.................................................. 10
3.2 Operation ..........................................................11
4. Specification Table ................................................... 14
5．Outfit ................................................................. 15
6．Troubleshooting Guide ............................................. 16

2
User Notice
Ⅰ. Safety Notes
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. When running, the lamp house and nearby parts will be very hot. Please ensure there is enough
cooling room for them.
5. Make sure the instrument is earthed, to avoid lighting strike.
6. For safety, be sure the main switch is in “O”(off) state before replacing 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 down.( Specified: Halogen Lamp6V/20W)
7. 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.
8. 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 possibly as you can.
3. The nosepiece and coarse/fine focus unit have a compact and precise frame; please don’t
disassemble them as possibly as you can.
4. Keep the instrument clean, wipe dust regularly, and be attention to avoid contaminating the
optical elements especially.
5. 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 aether. (Note that
the alcohol and ether are highly flammable, do keep them away from the fire or potential
sources of electrical sparks, and use them in a drafty room as possible as you can.)
6. Do not attempt to use organic solvents to clean the microscope components other than the glass
components. To clean them, use a lint-free, soft cloth slightly moistened with a diluted neutral
detergent.

3
7. When using, if the microscope is splashed by liquid, cut off the power at once, and wipe up the
moisture.
8. Do not disassemble any parts of the microscope, which will affect the function or decline the
performance of the microscope.
9. Place the instrument in a cool, dry position. When not using the microscope, keep it covered
with a dust cover. Make sure the lamp socket is cool before covering the microscope.

4
1.Components
STM-2030B Biological Microscope
Binocular viewing head
Eyepiece
Rule
r
Condense
r
Objectives
Nosepiece
Stage
Collecto
r
Main bod
y

5
2.Assembly
2.1 Assembly Diagram
The following figure shows the installation sequence of the components. The number in the figure
shows the assembly steps.
Before installing, be sure every components is clean, do not score any parts or glass surface.
Keep well with hexagon wrench provided. When replacing the components, you will need it
again.
①
②
③④
Objectives
Power cord
Main body
10X Eyepieces
Binocular Viewing Head

6
2.2 Assembly Steps
Fig.1
Fig.2
2.2.1 Installing Binocular viewing head
（Fig.1, 2）
Insert the digital viewing head into the
microscope head, turn into the right position,
then screw down the bolt①to fix it.
2.2.2 Installing the eyepieces（Fig.3,
Fig.4）
Insert the eyepieces into the eyepiece tube
until they are against each other as shown in
Fig.4.
Fig.4
①
Fig.3
NOTE:
Operation Conditions:
1．Temperature: 0℃～40℃,Maximum
Relative Humidity: 85%.
2．High Temperature: High Temperature
and humidity will result in a mildewing,
dew and even ruinous instrument.
3．Avoid placing the instrument in a dusty
environment. When ending your
microscope operation, please cover it with
the dust cap.
4．Lay the microscope in a plan and stable
position, please.

7
Fig.6
2.2.3 Installing objectives (Fig.5& 6）
1. Adjusting the coarse focus knob until the
support device of the mechanical stage
reaches its low limit position.
2. Screw the lowest magnification objective
into the nosepiece from the left or the right
side, then revolve the nosepiece clockwise
and mount other objectives by the sequence
of low to high magnification
Installing objective this way will make the
change of magnification to be easier during
using.
Clean the objective regularly, for lens is
susceptible to dust.
When operating, use 10×magnification
objective to search and focus specimen
firstly, then replace with higher
magnification objective if necessary.
When replacing the objective, slowly turn
the nosepiece until you hear “clicked”,
which means the objective is in the
required position--the light path center.
2.2.4 Installing the color filters (Fig.7)
1. Turn the condenser bracket①out at the
direction of arrow in Fig.7
2．Put the required filters into the holder on②
the bracket, and then turn the bracket back
to the right position.
★Baby blue and green filters are available in
standard outfit.
Fi
g
.5
Fig.7
①
②

8
2.2.5 Connecting the power cord
(Fig.8, 9,10)
★The cable and cords are vulnerable
when bent or twisted, never subject the
power cord to excessive force.
1. Turn the main switch①to “O” (off) state
before connecting the power cord.
2. Insert the power plugs②into the power
jack③of the microscope; make sure the
connection is well.
3. Plug the power cord ④into the power
supply receptacle safely. Make sure the
connection is well.
★Do use the supplied power cord all the
time. If lost or damaged, select the same
standard cord, please.
2.2.6 Replacing the Fuse（Fig.8, 9, 10）
Do remember to set the main switch①to
the state of “O” (OFF) and unplug the power
cord ②before replacing the fuse. Rotate the
fuse kits⑤out of the holder, replace with a
new fuse, then rotate it back to the holder
again.
★The rating of the new fuse should be the
same as the old one.
Fig.8
①
Fig.10
④
⑤
Fig.9
③②

9
.
2.2.7 Installing and replacing the
lamp（Fig.11, 12）
Please use the specified halogen Lamp
6V20W. Replace the lamp as follows if
necessary.
1. Please set the main switch to “O” (off)
state before replacing, and make sure the
bulb, the lamp room and periphery are all
cool enough to carry no burn. Then, you
can do your replacing.
2. Loose the bolt①and open the window②
on the bottom of the microscope base with
“一”type screwdriver.
3. Pull out the old bulb③,hold the new bulb
after you wrap it with gauze or other
protection materials and insert its pin as
deeply as possible into the jack in the
lamp holder.
4. Close the window and tighten the bolt .①
Please insert the bulb gently, or it will be
damaged by excessive extrusion.
Do not touch the halogen bulb with
bare hands. It will shorten the
service life or cause it to burst. If
you leave fingerprints on the
surface carelessly, clean it with a
piece of dry soft cloth.
Fig.11
②
①
③
Fig.12

10
3．Adjustment & Operation
3.1 Adjustment Sets（Fig.14,Fig.15）
Main Switch
Brightness Adjustment Knob
Fig.15
Right Coarse Focus Knob
Right Fine Focus Knob
Tension Adjustment Collar
Fig.14
Condenser Adjustment Knob
Longitudinal Adjustment Knob
Transversal Adjustment Knob
Locking Set
Left Fine Focus Knob
Left Coarse Focus Knob
Aperture Diaphragm Adjustment Lever
Diopter Ring
Interpupillar Distance Indicator

11
3.2 Operation
Spanner
3.2.1 Adjusting the brightness（Fig.16）
1. Connect the power, turn on the main
switch①(shown in the figure)which on the bottom
side of the base to “－”(on).
2. Turning the brightness adjustment knob
②clockwise, the voltage decline, and the
brightness weaken; Whereas turning at the opposite
direction, the voltage raise, and the brightness
strengthen.
Using the microscope at a lower voltage can
prolong the service life of the bulb.
3.2.2 Placing the specimen（Fig.17）
1. Place the specimen③on the center of the stage,
and then nip it with the specimen holder④.
2. Turn the transversal and longitudinal adjustment
knobs which on the mechanical ruler to 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 the specimen（Fig.18, 19）
1. Focus the specimen with 10X objective. To avoid
the objective touching the specimen during focusing,
you should raise the mechanical stage to let the
specimen close to the objective at first, then slowly
separate them to bring the specimen to focus.
2. Turn the coarse focus knob conversely to lower the①
specimen and search images in the 10×ocular
simultaneously, and then use the fine knob to make②
focus. After that, you can replace with other
magnification objectives safely, and focus without the
risk of damaging the specimen.
3. When the specimen is focused, tighten the locking set
(in Fig.14) to give a height limit to the stage. In this
way, the stage only can lower, avoiding false
operation and damage to the specimen.
Fig.19
①
②
Fig.16
Fig.17
Fi
g
.18
①
③
②
③
⑤
④

12
● The tight tension of the coarse focus knob
has already been adjusted before leaving
factory. If loosen (e.g. the stage slip down by
its weight), please screw the intention
adjustment collar to the right position by③
the supplied spanner.
3.3.4 CondenserAdjustment（Fig.20）
Turn the condenser focus knob to move the
condenser up and down. Raise the condenser
when using the high magnification objective,
and descend it when using the low
magnification one.
The condenser and the objective are coaxial.
It has been adjusted before leaving factory,
so the user needn’t to adjust them by self (the
distance between the top of the condenser
and the stage should be in the range of
0.03mm~0.4mm.)
The highest position of the condenser has
been adjusted too. It also needn’t any user’s
operation.
3.3.5 Aperture Iris Diaphragm Adjustment
（Fig.20,21）
Turn the aperture iris diaphragm lever①to
adjust the aperture iris diaphragm.
Generally, setting the aperture iris
diaphragm to 70- 80% of the N.A. of the
objective in use will provide an image with good
contrast.
● If the size of the aperture diaphragm
minified, the brightness and the resolution
declined, while the contrast and the depth of
field increased; In other words, if the size
largen, the brightness and the resolution
improved, but the contrast and the depth of
field declined.
● Generally, setting the size of the condenser
aperture diaphragm at 70%～80% of the
numerical aperture, you can obtain a clear
image with enough contrast. If the open of
the aperture diaphragm is too small, the
resolution were very low, so please don’t
Magnification：10×
N.A.：0.25
①
Fig.20
Fig.21
Specimen
Image of Aperture Iris Diaphragm

13
● Minify the aperture below 60% of the objective’s numerical aperture unless in a special case, for
instance, observing an almost transparent specimen.
● The numerical aperture is marked on the objective. For example, the mark “ 10/0.25 ” means
the magnification is 10×, and the numerical aperture is 0.25.
● If you want to observe the image of the aperture iris 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 Interpupillary
Distance (Fig.22)
The interpupillary distance range:
55mm～75mm.
While looking through the eyepieces,
move both sliders to adjust interpupillary
distance until the left and right fields of
view coincide completely. The value on
the right slider is your interpupillary
distance.
3.3.7 Adjusting the Diopter（Fig.23）
Turn the diopter rings②on both eyepieces to
align the number on the rings (which is
corresponding to your interpupillary distance)
with the white dot on both sliders to bring③
the specimen into focus.
★ The diopter range of the eyepiece is ±5
diopter.The number aligned to the line
on the viewing head is the diopter in use.
②
Fig.23
③
Fig.22
①

14
4. Specification Table
4.1 Main specifications
Mechanical Tube Length 160mm
Viewing Head Sliding Binocular/Trinocular Head, 45°Inclined, Interpupillary Distance55-75
mm
Eyepiece Field of view: φ18mm
Nosepiece External Quadruple Nosepiece
Objective Achromatic objectives 4×, 10×, 40×, 100×(immersion oil)
Focusing Coaxial Coarse & Fine Adjustment, Moving Range 30mm, Fine Division
0.004mm.
Condenser Abbe Condenser, NA=1.25
Stage Double Layers Mechanical Stage 140mm×140mm, Moving Range 74×50mm
Illumination LED illumination or 6V/20W Halogen Lamp
4.2 Eyepieces and Objectives
1. Achromatic Objectives
Magnification
Numerical
Aperture
(NA)
Thickness of
glass slide
(mm)
Focal length
(mm)
Working
Distance(mm) Type
4× 0.10 0.17 31.05 18 Dry
10× 0.25 0.17 17.13 6.5 Dry
40× 0.65 0.17 4.65 0.53 Dry
100× 1.25 0.17 2.906 0.13 Oil

Plan Achromatic Objectives are optional
1. Eyepieces
Designation Magnification Field of view(mm)Focal Length(mm)
Wide Field 10X Φ18 24.94mm
Plan Field 16X Φ11 15.58mm
4.3 Total Magnification
Eyepiece 10× 10× 10× 10×
Objective 4× 10× 40× 100×
Total
Magnification 40× 100× 400× 1000×
5．Outfit
Designation Magnification Numerical Aperture Working Distance
Plan Achromatic
Objective
4X 0.10 15.8mm
10X 0.25 12.2 mm
40X(S) 0.65 0.37 mm
100X( Oil,S) 1.25 0.13 mm
Component Name Specification Quantity Standard Outfit
Main body
Main Standard 1Optional
Double Layers Mechanical Stage 1Optional
Condenser Holder 1Optional
Viewing Head Digital binocular head 1Optional
Condenser Abbe Condenser, NA=1.25 1Optional
Nosepiece Quadruple 1Optional
15

6．Troubleshooting Guide
1. Optical system
TROUBLE CAUSE SOLUTION
The edge of the field
of view is dark or the
brightness is not
uniform
The nosepiece is not in the located position (objective
and light path not coaxial) Locate the nosepiece properly where it clicks
The image of filament is not centered Center the filament
A lens (the objective, condenser, eyepiece or collector)
is dirty. Clean it thoroughly
Find dust and stain in
the field of view
There are stains on the lens（including condenser,
objective, eyepiece 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
The image is
defocused ( low
resolution \ contrast)
There is no cover slip on the specimen Add coverslip
The cover slip is too thick or too thin Use the standard coverslip
( 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
Illumination
LED illumination 1Optional
6V20W Halogen Lamp 1Optional
Spare lamp (6V20W Halogen lamp) 2Optional
Spare fuse(2A) 2Optional
Eyepieces 10×Plan Eyepieces 2Optional
Objectives
Achromatic objective 4× 1Optional
Achromatic objective 10× 1Optional
Achromatic objective 40× 1Optional
Achromatic objective 100×(oil, spring) 1Optional
Condenser Bright Field Condenser with Adjustable
Iris Diaphragm 1Optional
Filter Blue, Green 1 ea. Optional
16

17
The image is
defocused ( low
resolution \ contrast)
There are stains on the lens（including condenser,
objective, eyepiece and collector）
Clean it up
didn’t use oil for the oil objective Use immerse oil
There was bleb in the oil Eliminate the bleb
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 centering the
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 shift
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（including condenser,
objective, eyepiece and collector）
Clean it up
2. Mechanical system
TROUBLE 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 touch
the specimen when
changed from 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)
The specimen is not
easy to move The specimen holder is not fixed Fix it

18
The binocular image is
not coincident
The interpupillary distance is not
correct Adjust it
Eyes are too tired
No diopter adjustment Adjust the diopter correctly
The brightness is not suitable Adjust the voltage of the lamp
3. Electrical system
TROUBLE CAUSE SOLUTION
The lamp can’t light
when the switch is
turned on
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 a substandard 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
The voltage is too low
Use the specified lamp
increase the voltage
The bulb flickers or
the brightness is
vertiginous
The bulb is going to burn out Replace it
The bulb is not entirely inserted into the
holder Check and insert it again