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Stereoscopic microscopes are used for viewing 3-dimensional objects, inspection or assembly of small 
parts, and for dissection of biological specimen.  They provide an upright, unreversed image which 
permits easy manipulation of the object being viewed while looking through the microscope.  They are 
designed for viewing solid objects at low magnification, but they will also permit viewing of some 
transparent specimen slides. 
 
For optimum viewing satisfaction, follow these simple procedures.  Nomenclature used to describe 
components and controls can be identified by referring to the diagram at left. 
 

UNPACKING 
 

Do not touch any of the lens surfaces while handling the microscope.  Dust, dirt, fingerprints can damage 
the delicate lens surfaces or adversely affect image quality. 
 
Remove microscope stand and head assembly from carton.  Remove rubber eyeshields  and  dustcover.  
Remove “pin spanner wrench” (used to adjust focusing tension), “L hex wrench” (used to remove locking 
set screw on stage plates), and plastic black/white contrast plate (80mm diameter).  Your microscope is 
also supplied with a frosted glass stage plate (80mm diameter), which is already mounted in the 
microscope base. 
 
Examine packing material before you discard it.  Retain the styrofoam container in case you need to 
transport, store, or return the microscope for service.  If it becomes necessary to ship the microscope for 
any reason, pack it in the styrofoam container, and then pack the styrofoam in another corrugated 
shipping container for optimum protection.  Use of the styrofoam alone will not provide adequate 
protection in transit, and will void your warranty. 
 
 

ASSEMBLY & OPERATION

 

 
1.  Install rubber eyepiece shields over top of eyepieces, with the flared portion of the shields positioned 

at the outside edge of eyepieces.  These help block out undesired light reflections, and to position 
your eyes at the proper point above the eyepieces. 

 
2.  Please observe that the head rotates 360 degrees.  To position the binocular head in stand, loosen 

knurled head locking screw.  Rotate head to face either forward or backward, whichever suits your 
preference or needs.  Then, tighten knurled head locking screw. 

 
3.  This model is furnished with  stage plates.  The frosted glass plate is used when viewing transparent 

specimen slides or for viewing some specimen thin enough through which light can pass (insect 
wings, etc.). The black/white contrast plate can be used when viewing opaque objects or for 
dissecting.  Choose side of plate providing best contrast with specimen.  

 

FROSTED GLASS PLATE MUST BE USED IF USING BOTTOM ILLUMINATION.  HEAT 
GENERATED IN BASE FROM BOTTOM LIGHT WILL WARP OR DAMAGE THE PLASTIC 
BLACK/WHITE PLATE.  SUCH DAMAGE WILL NOT BE COVERED BY WARRANTY.  It is 
acceptable to leave the glass plate in place for most viewing purposes. 

 

To switch plates or to reverse sides of contrast plate, use the “L hex wrench” to loosen set screw at 
side of base, only enough to permit removal of plate.  Replace plate and tighten set screw. 

 
4.  Plug cord into a standard 120 volt AC three-wire grounded outlet. 

Summary of Contents for 446TBL

Page 1: ...Instruments Inc 6508 Tri County Parkway Schertz Texas 78154 Phone 210 590 9010 Fax 210 590 1104 INSTRUCTIONS FOR MODELS 446TBL 447TBL AND 448TBL STEREOSCOPIC MICROSCOPES Copyright 1 2 01 National Optical Scientific Instrument Inc ...

Page 2: ...urret Head position locking screw Focusing knob Base Stage Plate Stage Clips Top light housing Head retaining screw one on each side Light control switches Power switch Post locking knob Fuse Rubber eyeshields Light housing locking knob Locking set screw located on side ...

Page 3: ...ntainer and then pack the styrofoam in another corrugated shipping container for optimum protection Use of the styrofoam alone will not provide adequate protection in transit and will void your warranty ASSEMBLY OPERATION 1 Install rubber eyepiece shields over top of eyepieces with the flared portion of the shields positioned at the outside edge of eyepieces These help block out undesired light re...

Page 4: ...ve WF10X supplied WF15X optional Maximum Total Magnification Field Size Total Magnification Field Size Working Distance Specimen Height 1X 10X 20mm 15X 13mm 75mm 60mm 3X 30X 6 6mm 45X 4 3mm 2X 20X 10mm 30X 6 5mm 75mm 60mm 4X 40X 5mm 60X 3 2mm 1X 10X 20mm 15X 13mm 75mm 60mm 2X 20X 10mm 30X 4 5mm 8 Before making close observations the following steps should be taken to adjust the microscope for your...

Page 5: ...ood source of air C To clean eyepiece lenses do not remove from eyepiece tube Clean only the outer lens surface Breath on lens to dampen surface then wipe with lens paper or tissue or use a cotton swab moistened with distilled water Wipe lenses with a circular motion applying as little pressure as possible Avoid wiping dry lens surface as lenses are scratched easily If excessive dirt or grease get...

Page 6: ...ear left side of microscope base To remove fuse from holder insert a 6mm screwdriver blade into slot located in rear of fuse holder cap Slightly depress and rotate screwdriver turn in direction of arrow release pressure on screwdriver to release the fuse Pull cap and fuse out of fuse holder Insert proper fuse into fuse cap Insert fuse cap into fuse holder Using screwdriver rotate fuse cap assembly...

Page 7: ...Black plastic stage plate 80mm 941 460W White plastic stage plate 80mm 941 410 Black White plastic contrast plate 80mm 965 400 05 Eyepiece reticle 5mm 100 div 22 8 mm diameter for WF10x eyepiece only 965 400 10 Eyepiece reticle 10mm 100 div 22 8 mm diameter for WF10x eyepiece only LIMITED LIFETIME WARRANTY Please see our website www nationaloptical com for complete warranty details and exclusions ...

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