BEL STMPRO User manual
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STEREO ZOOM MICROSCOPE
Mod. STMPRO
USER MANUAL
FILENAME: Bel Photonics STMPRO, User manual-A4_REV2.doc
BEL Engineering srl
Electronic precision balances and scientific instruments
Via Venezia Giulia 1, 20052 Monza (MI) Italia
tel:+39 039 2006102/2005302 fax: +39 039 2006082
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STMPRO
Series Zoom Stereo Microscope is a kind of binocular or trinocular stereomicroscope, which
can magnify micro objects continually and show stereo up-right images. It provides clear high-contrast image,
wide field and long working distance. It can be used for observation studies in medical and health, farming and
forestry, as well as public security departments, schools and scientific research institutes, and is also used for
inspection, assembling and repair of tiny spare parts in electronics and precision machine industries.
I. FEATURES
1. Objectives range of zoom magnification: 0.7X - 4.5X;
2. Eyepieces field is wide and clear, field: Φ22mm; eyepiece magnification:10X
3. Total Magnification of Microscope: 7X - 45X
4. The binocular eyepiece tubes is inclined 45º and can be rotated 360º;
5. The adjustment range of interpupilar distance: 53-75mm;
6. The adjustment diopter of eyepiece tube: -5…+5;
7. Anti-mildew device is installed in the binocular to extend the life of instrument;
8. Transformer is out of the base of instrument to reduce electricity disturb and improve security and reliability;
9. The mode of illumination selection and brightness adjusting are very easy, There are three modes: transmitted light,
reflected light and mixed light illumination;
10. Different adapters can be selected to connect a CCD camera onto the trinocular tube.
II. MAIN SPECIFICATIONS
Eyepiece type magnification Filed view(mm) Focus(mm) Remark
Wild filed view
eyepiece 10X Φ22 25
Plan eyepiece 15X Φ16 16.7 Optional
Plan eyepiece 20X Φ12 12.5 Optional
Plan eyepiece 25X Φ9 10 Optional
Dividing eyepiece
10X Φ18 25 Optional
III. OTHER SPECIFICATIONS WITH OPTIONAL OPTICS
Main frame
Additional
Objective
0.5X
Additional
Objective
0.75X
Additional
Objective
1.5X
Additional
Objective
2X
Objective
Eyepiece 0.7X-4.5X 0.35X-2.25X 0.49X-3.38X 1.05X-6.75X 1.4X-9X
7X-45X 3.5X-22.5 5.3X-33.8X 10.5X-67.5X 14X-90X
Total
Magnification
WF 10X
(standard) φ28.6～
φ4.4 φ57.2～
φ8.9 φ38.1～
φ5.9 φ19～
φ2.96 φ14.3～
φ2.2 Field of view,
diameter (mm)
10.5X-67.5X 5.3X-33.75X 7.9X-50.6X 15.8X-101.3X 21X-135X Total
Magnification
WF 15X
φ21.4～
φ3.3 φ42.9～
φ6.7 φ28.6～
φ4.4 φ14.3～
φ2.2 φ10.7～
φ1.7 Field of view,
diameter (mm)
14X-90X 7X-45X 10.5X-67.5X 21X-135X 28X-180X
Total
Magnification
WF 20X
φ17.1～
φ12.9 φ34.3～
φ5.3 φ22.9～
φ3.6 φ11.4～
φ1.8 φ8.6～
φ1.3 Field of view,
diameter (mm)
17.5X-105X 8.8X-52.5X 13.1X-78.8X 26.3X-157.5X 35X-210X Total
Magnification
WF 25X
φ12.9～
φ2.1 φ25.7～
φ4φ17.1～
φ2.7 φ8.6～
φ1.3 φ6.4～
φ1Field of view,
diameter (mm)
88 137 103 48 29
Working
distance (mm)
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IV. COMPONENTS
Basemen
t
Eyepiece
Additional
objective
Heads
Additional
Illumination
Stand
Adapters &
Video
Cameras & Video Head
(STMPRO-VIDEO)
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Fig.1
1. Eyepiece shade 13. Focus adjustment knob
2. Eyepiece 14. Backstop
3. Diopter ring 15. Power plug and socket
4. Eyepiece tube 16. Power supply
5. Binocular 17. Transmitted light brightness adjustment knob
6. Reflection illumination power plug 18. Specimen clip
7. Trinocular 19. Organic glass stage
8. CCD adjusting tube 20. Reflection light brightness adjustment knob
9. CCD adapter 21. Tube of holding screw
10. Zoom knob 22. Lamp cover
11. Objective hood 23. Reflection light angle adjustment screw
12. Holdin
g
knob 24. Power switch
Ring
lamp
Holding
screws for
1 2 3456
20
15
11
13
12
10
9
8
7
23
22
21 14
16
17
18
19
24
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V. OPERATION
1. Plug in power；
2. When use the model STMPRO with transmitted illumination (Fig.1), you should turn on the power switch 24 at first,
then turn on the transmitted light brightness adjusting knob 17, which means the transmitted light working. When
use it with reflected illumination, you should plug the Reflection illumination power plug 6 and turn on the reflected
light brightness adjusting knob 20, which means the reflected light working, and then adjust the angle and
brightness of reflected illumination to satisfy your needs. When use it with mixed illumination, you should turn on the
both light brightness adjusting knob and adjust their brightness to obtain satisfactory mixed illumination；
3. If you want to change the position of observation, you can loose the tube of holding screw 21, then turn the binocular
or trinocular in any angle which you need, then tighten the screw 21 again；
4. Turn the both diopter ring 3 to “0” and zoom knob 10 to 4.2X, observe with your right eye and turn the focus
adjustment knob 13 to make the image of specimen clear, then observe with your left eye and adjust it’s diopter, no
adjusting focus adjustment knob 13, to make the image of specimen clear；
5. Turn the zoom knob 10 from 4.2X to 0.7X, if the image isn’t clear, you should observe the left and right eyepiece tube
with respective eye and adjust respective diopter to make image clear, then turn the zoom knob 10 to 4.2X again, if
the image isn’t clear , you should adjust the focus adjustment knob 13 to make the image clear. According to the
adjustment above, you can obtain a clear and continue image from 4.2X to 0.7x；
6. Observes the image with both eyes, adjust the interpupillary distance of the eyepiece tube 4 until the both field of view
can be superposition；
7. When use the trinocular, you can connect the CCD camera to trinocular with CCD adapter 9. You should Observe
with both eyepieces and adjust according of “the operation 4 and 5” until the image clear, then you can observe the
monitor, if the monitor image isn’t clear, you should adjust the CCD adjusting tube 8 to make the image clear. If the
image position on the monitor can’t satisfy you need, you should loose the CCD adapter holding screw and turn CCD
adapter 9 to change the angle of image on the monitor to satisfy your need, then tighten the holding screw again；
8. If you need the accessorial big objective, you can turn it into objective hood 11；
9. If you need the annular fluorescence illumination, you can connect it to objective hood 11 with holding screw.
VI. EXCHANGE THE LAMP
1. Reflected illumination: unplug the power supply and turn off the power switch, loosen off lamp cover, pull out the bad
lamp and then install a new lamp, tighten the lamp cover again；(Fig.1)
2. Transmitted illumination: remove Organic glass stage, pull out the bad lamp, then install a new lamp again；
3. Annular fluorescence illumination: loose the annular fluorescence illumination holding screw and take off the bad and
install a new, tighten the screw again.
VII. MAINTENANCE
1. Sweep the lens
Sweep the lens by lens tissue or soft fabric immersed with mixed liquid of alcohol/ether or diethyl benzene. Cleaning
the oil on the 100X objective whenever finish operating.
2．Clean the painted parts
The dust on the painted parts can be removed by gauze, for the grease spots, the gauze immersed slightly with
aviation gasoline is recommended. Do not use organic solvents such as alcohol, ether or other thinner etc, for cleaning
the pointed parts or plastic components.
3. Avoid disassembling the microscope
Being a precise instrument, do not disassemble the microscope casually that may cause serious damage to its
performance.
4. Being not used
Cover the microscope with polymethyl methacrylate or polyethylene and places where there is dry and modules.
Suggest that storage all objectives and eyepieces in closed container with drying agent.
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