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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 
 

1.  For Models 131 & 132, carefully remove microscope, dustcover and for Models 131-CLED & 132-CLED also remove 

a “L” hex wrench.  Always handle and move microscope by securely holding the arm of microscope.  Avoid touching 
any of the lens surfaces while handling the microscope.  Dust, dirt, or fingerprints can damage the delicate lens 
surfaces or adversely affect image quality. 

 
2.  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. 

 

DESCRIPTION OF COMPONENTS

 

 
1.  EYEPIECE  (ocular lens)  Lens closest to the eye, magnifies the primary image formed by the objective lens.  Dual 

head models 132 and 132-CLED feature both an inclined eyepiece (for primary viewing) and a vertical eyepiece for 
second viewer or for mounting a camera.  The inclined eyepiece is equipped with a “pointer” that rotates as the 
eyepiece is turned. 

 
2.  DIOPTER ADJUSTMENT (on models 132 and 132-CLED only)  Permits focusing adjustment of image for any 

difference in vision between primary and secondary viewers. 

 

3.  OBJECTIVE TURRET (nosepiece)  Revolving turret which holds objective lenses, permits changes of magnification 

by rotating different powered objective lenses into optical path. 

 
4.  OBJECTIVE LENS    Lens closest to the object being viewed, forms first magnified image of the specimen. 
 
5.  STAGE CLIPS   Two locked-on clips hold specimen slide in place on stage.  Note:  Your microscope is already drilled 

and tapped to accept an optional mechanical stage.  Mechanical stage replaces stage clips and permits precise, 
mechanical manipulation of the specimen slide. 

 
6.  STAGE    Platform of the microscope where the specimen slide is placed. 
 
7.  CONDENSER LENS    An 0.65 N.A. condenser lens, fixed in center of stage, condenses light rays from substage 

illumination and fills the back lens element of objective lens to improve image resolution. 

 
8.  DISC DIAPHRAGM    Rotating disc located below stage, with holes of various apertures, designed to help achieve 

optimum resolution of the objective lens.  Larger apertures used for higher magnifications, and smaller apertures used 
for lower magnifications. 

 
9.  SAFETY RACK STOP    When properly adjusted, controls maximum upward travel of stage.  Prevents higher power 

objectives from breaking specimen slides, prevents damage to objective lenses.  This stop has been pre-adjusted at 
the factory. 

 
10.  FOCUSING KNOBS    Coarse focusing knobs (larger knobs) located on each side of arm, raise or lower stage to 

bring specimen image into focus.  Fine focus knobs (smaller knobs located just below coarse focusing knobs) permit 
more precise image adjustment. 

 
11.  ILLUMINATION    Models 131 & 132 have a built-in substage electric illuminator and Models 131-CLED & 132-CLED 

have a built-in substage electrical LED illuminator that provides constant, reliable, pre-focusing illumination. 

 

OPERATION

 

 
1.  Place microscope directly in front of you in a manner which permits you to comfortably look into the eyepiece.  Note 

that the head of microscope rotates 360

º

, permitting you to operate the microscope from the front or from the back, 

whichever is most convenient for you.  It also permits convenient sharing of microscope by more than one user, by 
simply rotating head, without needing to move entire microscope.  Most users will position the microscope with the 
arm facing them so that focusing knobs are most convenient to reach. 

Summary of Contents for 131

Page 1: ... These models share common features nomenclature and method of operation The only difference are Models 131 132 feature electric illumination from a tungsten bulb Models 131 CLED 132 CLED feature electric illumination from a LED bulb Models 132 132 CLED have both 30 inclined and vertical eyepiece tubes each supplied with WF10x eyepiece Copyright 1 2 01 National Optical Scientific Instrument Inc ...

Page 2: ...STAGE CLIPS Two locked on clips hold specimen slide in place on stage Note Your microscope is already drilled and tapped to accept an optional mechanical stage Mechanical stage replaces stage clips and permits precise mechanical manipulation of the specimen slide 6 STAGE Platform of the microscope where the specimen slide is placed 7 CONDENSER LENS An 0 65 N A condenser lens fixed in center of sta...

Page 3: ...therwise you will not be able to see anything when looking through the microscope b Standard lenses provided with your microscope are a widefield 10x eyepiece two eyepieces supplied with models 132 and 132 CLED 4x 10x and 40x objectives The 40x objective lens has a special spring retractable mechanism which retracts slightly if front of lens comes in contact with the specimen slide See chart below...

Page 4: ... swab or lens tissue To clean objective lenses do not remove objectives from microscope Clean front lens element only following same procedure NOTE Fingerprints or other matter on the front lens element of the objective lens is the single most common reason that you will have difficulty in focusing the microscope Before having costly servicing done or before returning to National for warranty repa...

Page 5: ...tly Replace with a 110v 20 watt lamp with double contact medium bayonet base This is a standard commonly used replacement bulb National 800 102 Carefully wipe lamp to insure it is clean and free of all fingerprints Replace field lens housing assembly b Changing LED bulb on Models 131 CLED 132 CLED To open the illuminators field lens housing use 0 9mm L hex key wrench supplied with your microscope ...

Page 6: ...n also result from dirt on inside of eyepiece It is recommended that you have service technician clean inside of lens OPTIONAL ACCESSORIES AND PARTS 610 045R WF10x eyepiece w reticle 10mm 100div 615 045 WF15x eyepiece w pointer 760 045 DIN 60xR objective lens N A 0 90 800 001 Replacement LED bulb 131 CLED 132 CLED only 800 102 Replacement bulb 115v 20 watt tungsten D C medium base 131 132 only 801...

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