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Stereoscopic microscopes are designed for viewing 3-dimensional objects, inspection or assembly of small parts, and for dissection of 
biological specimen at low magnification.   The 35° inclined viewing head provides an upright, unreversed image which permits easy 
manipulation of object being viewed while looking through the microscope.  The incidental and transmitted illuminators incorporate 
high intensity Lambertain, 5500K color temperature 3 watt LED lamps. 
 
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 
 

Remove and unpack box A containing the head holder/focusing block mechanism.  Remove and unpack box B  containing one pair of 
eyepieces, 2 each rubber eyeshields, 0.90mm and 2mm “L” hex key wrench, “pin spanner wrench” (used to adjust focusing tension), 
95mm frosted stage plate and dust cover.  Remove and unpack box C containing zoom head assembly.  Remove corrugated stand 
retainer C and carefully remove microscope post stand with 90mm diameter black/white contrast plate installed from master carton.  
Remove and unpack box D containing AC power cord, 12 volt switching power adaptor. 
 
1.  Make certain not to touch any of the lens surfaces while handling the microscope.  Dust, dirt, fingerprints can damage the delicate 

lens surfaces or adversely affect image quality. 

 
2.  Examine packing material before you discard it.  Retain the packing boxes 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 original boxes and then pack 
these boxes in outer corrugated shipping container for optimum protection.  Use of the inadequate packing will not provide 
adequate protection in transit, and will void your warranty. 

 

ASSEMBLY  
 

Place the microscope post stand on a flat stable and clean surface. 
 
1.  Mounting the focusing assembly to the microscope post stand. 

 
A.  Tighten support collar locking screw located on post stand. 

 

B.  Loosen focusing block locking screw locate on back of focusing block 
 
C.  Slide focusing block over 32mm diameter vertical post of stand 

 

D.  Tighten focusing block locking screw  

 

2.  Mounting stereo zoom head to stand. 

 

A.  Loosen head locking screw. 
 
B.  Insert head into the stand (do not force), positioning head to face either forward or backward, whichever suits your preference 

or needs. 

 
C.  Tighten head locking screw. 

 
3.  Remove the black dust caps from the eyepiece tubes and carefully insert the eyepieces. 

 

4.  Install rubber eyepiece shields over top of eyepieces. 

 

5.  Connect the coaxial plug, from incidental illuminator, into power jack located on top of 32mm diameter post. 

 

6.  Plug the 2 pin connector located at one end of AC power cord into receptacle on side of power adapter.  Plug other end of AC 

cord into appropriate 100 to 240 volt AC outlet (Adaptor automatically adjusts to 12 volt output).  Plug the 12 volt DC coaxial plug 
into power jack located on rear of microscope base. 

 

OPERATION

 

 
1.  ILLUMINATION 
 

A.  The microscope is furnished with two 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 plastic black/white contrast 

Summary of Contents for 425 Series

Page 1: ...ts Inc 6508 Tri County Parkway Schertz Texas 78154 Phone 210 590 9010 Fax 210 590 1104 INSTRUCTIONS FOR 425 425T SERIES STEREOSCOPIC ZOOM MICROSCOPES Copyright 5 26 09 National Optical Scientific Instrument Inc A Member of the Motic Group ...

Page 2: ...y Locking Support Collar Post Intensity Control for both illuminators Incidental top and Transmitted bottom Light Switches Knurled Diopter Adjustment on both eyepieces Head Head Locking Screw Knurled Cover Ring Incidental Illuminator Top Light Beam Adjustment Screw Main Power Switch Stage Clips Stage Plate Base Power Jack Illustrated Model 425T 440PLL 10 Prism Housing Trinocular Port ...

Page 3: ... service If it becomes necessary to ship the microscope for any reason pack it in the original boxes and then pack these boxes in outer corrugated shipping container for optimum protection Use of the inadequate packing will not provide adequate protection in transit and will void your warranty ASSEMBLY Place the microscope post stand on a flat stable and clean surface 1 Mounting the focusing assem...

Page 4: ...ation markings are located on right knob is positioned at the black index dot on head Lower magnifications have larger fields of view making it easier to position and locate area to be viewed B Place a flat object or specimen slide cover glass up on stage plate C Position focusing knobs in the center of focusing range D The height of viewing head can be adjusted up or down on the post in order to ...

Page 5: ... Accepts Reticle 24 95mm O D Interpupillary Distance 49 74mm 75 7 5X 30 7 3 8X 61 3 11 3X 20 4mm 1X 10X 23mm 5X 46mm 15X 15 3mm 2X 20X 11 5mm 10X 23mm 30X 7 7mm 3X 30X 7 7mm 15X 15 3mm 45X 5 1mm 4X 40X 5 8mm 20X 11 5mm 60X 3 8mm 5X 50X 4 6mm 25X 9 2mm 75X 3 1mm WF15X Field No 17 Optional 615 425 Does Not Accept Reticle Interpupillary Distance 47 72mm 75X 11 3 22 7mm 5 6X 45 3 16 9X 15 1mm 1X 15X 1...

Page 6: ...ra onto threads of video adaptor Locate knurled screw c located at the front of trinocular port on head Turn knurled locking screw in a counter clockwise direction to loosen screw and to permit removal of black plastic disk covering trinocular port Insert video adaptor tube into trinocular port If adapter does not insert easily further loosen knurled screws at side of port until adaptor tube drops...

Page 7: ... illuminator base to the microscope pole base B Carefully unplug the LED top light connector attached to socket marked LED from circuit board C Carefully unplug the LED bottom light connector attached to socket marked LED from circuit board D Using a 5 5mm hex nut driver remove two nuts from the 3mm screws securing light bracket to black base tray E Using a Phillips screw driver remove three each ...

Page 8: ...this microscope are warranted from date of purchase as follows Camera 1 year limited warranty Manufacturer warrants camera to be free from defects in material and workmanship under normal use and service for 1 year from date of purchase It does not cover damage resulting from abuse or misuse repairs or alterations performed by other than the manufacturer or damage occurring in transit Software 90 ...

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