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10.  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. 

 
11.  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. 

 
12.  ILLUMINATION:  Built-in substage electric illuminator provides constant, reliable pre-focused illumination. 
 
13.  RHEOSTAT INTENSITY CONTROL:  Controls illumination intensity.  Always turn control to lowest intensity 

before turning microscope power on or off.  This extends bulb life. 

 

14.  12VDC POWER CORD/CONVERTER:  Accepts 100v-240v 50H/60H input and supplies 12VDC power to 

the microscope.  Note that this converter accommodates either 120v or 240v and 50H or 60H power supply, 
eliminating the need for any additional transformer. 
 

15.  ON/OFF SWITCH:    This turns microscope lamp on 
 
16.  USB 2.0 CABLE:  Connects microscope & camera to computer.   
 

OPERATION 
 

Your microscope is fully functional as a standard microscope.  The following instructions apply only to operation 
of the microscope.  Refer to the software instructions for installation of the software and operation of the camera.  
Some steps for microscope operations are altered slightly in the software documentation, in order to utilize some 
of the unique features provided by the digital camera and software. 
 
1.  Illumination. 

 
A. 

Adjust intensity control on side of base to the minimum position.

  This should be done prior to 

each time light is turned on or off, in order to extend bulb life. 

 
B.  Plug one end of power cord into 12VDC switching power converter and other end into power outlet.  Plug 

12VDC converter into power jack on base of microscope.  Flip power switch on microscope base  “on”.  
Note that camera LED indicator will not light until USB 2.0 cable is connected to computer, and camera 
turned on by software commands.  

 
2.  Focusing the microscope. 

 
A.  Position the 4x objective lens into the optical path,  making sure that lens is properly indexed in its click-

stop position. 

 

B.  Swing moveable finger on slide holder outward.  Place specimen slide (cover slip up) on top of stage 

surface against fixed side of slide holder.  Slowly release moveable finger until it makes contact with 
specimen slide. 

 

C.  Rotate coarse focusing controls until specimen comes into focus. 

 

D.  Adjust fine focus controls until specimen is in sharp focus. 

 

E.  Adjusting the aperture (opening) of iris diaphragm. 

 

Iris diaphragm should not be used to control the brightness of illumination. Iris diaphragms are designed 
to help achieve high resolution of specimen and provide contrast in the image.  Smaller apertures will 
deliver higher contrast to image.  However, closing aperture too much will reduce resolution.  
Experimentation is the best method of determining the correct opening of  diaphragm.  Some suggested 
openings for iris diaphragm are: 

 

Содержание DC4-156-S

Страница 1: ...ered in separate instructions HOW TO USE YOUR MICROSCOPE SERIAL NUMBERS 1 Microscope serial number This number etched on back arm of microscope is the number under which your warranty is registered 2...

Страница 2: ...holder mechanical stage Fine focus knob USB output terminal 12 volt DC input Main Switch 12 volt DC output 12 volt DC switching power supply Detachable power supply cord 100v 240v 50H 60H input Rack...

Страница 3: ...ransported or returned to factory for any reason If it becomes necessary to ship the microscope for any reason repack it in the styrofoam container and then pack the styrofoam in another corrugated sh...

Страница 4: ...he software documentation in order to utilize some of the unique features provided by the digital camera and software 1 Illumination A Adjust intensity control on side of base to the minimum position...

Страница 5: ...another while requiring only a slight adjustment of the fine focus controls c When changing to the 40x and 100x objective lens care must be exercised when positioning these lenses into the optical pa...

Страница 6: ...for the presence of such contaminants If a microscope is returned to National for warranty repair and it is determined that such contaminants are the problem this is not covered under warranty and Na...

Страница 7: ...hnician repair outlet AC power cord not connected Plug into outlet 12 volt DC output plug not plugged into DC power jack Plug 12 volt DC output plug into DC power jack Lamp burned out Replace lamp Ima...

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