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National 111, Instructions Manual

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National Optical & Scientific Instruments Inc.

6508 Tri-County Parkway

Schertz, Texas 78154

Phone (210) 590-9010 Fax (210) 590-1104

INSTRUCTIONS FOR

MODEL 111

COMPOUND MICROSCOPE

Copyright © 1/2/01

National Optical & Scientific Instruments, Inc.

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Summary of Contents for 111

Page 1: ...l Scientific Instruments Inc 6508 Tri County Parkway Schertz Texas 78154 Phone 210 590 9010 Fax 210 590 1104 INSTRUCTIONS FOR MODEL 111 COMPOUND MICROSCOPE Copyright 1 2 01 National Optical Scientific Instruments Inc ...

Page 2: ...nob On Off Switch Tension adjustment behind focus knob Microscope head Objective turret Objective lens Stage clip Safety Rack Stop Base Illuminator field lens housing Condenser lens located in center of stage Disc diaphragm Eyepiece locking set screw ...

Page 3: ...r to direct attention to specific things of interest on the specimen slide 2 OBJECTIVE LENS Lens closest to the specimen forms the first magnified image of the specimen 3 OBJECTIVE TURRET nosepiece Revolving turret designed to hold objective lenses permits changes of magnification by rotating different powered objective lenses into optical path 4 STAGE CLIPS Two locked on clips hold specimen slide...

Page 4: ... the disc diaphragm observing that different apertures affect the sharpness of the image Turn diaphragm until sharpest possible image is obtained When turning the disc diaphragm you should hear a click as each aperture comes into proper position under the hole in center of stage If aperture is not properly positioned you will observe shadows in the field of view when looking through the microscope...

Page 5: ...y as lenses are scratched very easily 2 MECHANICAL MAINTENANCE A Rack stop screw has been pre adjusted at the factory and should not require readjustment However if you do attempt readjustment note the following Rack stop screw is located in center of arm behind stage platform Loosen round knurled locking nut by turning counter clockwise Loosen stop screw but do not remove Focus microscope on stan...

Page 6: ...ct light efficiency and bulb life E Replace illuminator field lens housing assembly TROUBLESHOOTING PROCEDURES PROBLEM REASON FOR PROBLEM SOLUTION Light fails to operate Outlet inoperative Have qualified service technician repair outlet AC power cord not connected Plug into outlet Lamp burned out Replace lamp Disc diaphragm has not clicked into proper position and is blocking light source beneath ...

Page 7: ...lb 115v 20 watt D C medium bayonet base 800 102 220V Replacement bulb 220v 20 watt D C medium bayonet base for use in locations having 220v electrical supply LIMITED LIFETIME WARRANTY Please see our website www nationaloptical com for complete warranty details and exclusions Revised 7 13 09 ...

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