National optical & scientific 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..
Eyepieces head of microscope knurled diopter collar post objective turret 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 lockin...
Page 3 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. The...
Page 4 5. There are three rocker type light controls located on top surface of microscope base. Main = turns power on and off “i” = turns incidental light on (top illumination) “t” = turns transmitted light on (substage illumination) remember to never operate bottom (transmitted) light with plastic ...
Page 5 e. Looking through left side of microscope with left eye, turn diopter adjustment collar located on left eyepiece until left image is sharp. Note the scale on the diopter collar and its position in relationship to the index mark on the eyepiece tube. You have now adjusted the microscope for y...
Page 6 3. Electrical maintenance the extent of electrical maintenance, by other than a qualified technician, should be bulb or fuse replacement. Be certain to turn switches off and remove plug from power source outlet before changing bulbs. Both top and bottom lights use the same 12 volt 10 watt tub...
Page 7 optional accessories and parts: #615-400 wf15x eyepieces (pair), increases magnification 50% #800-400 12v 10w replacement bulb #801-050 replacement fuse for 220v version, 0.5 amp #801-100 replacement fuse for 117v version, 1.0 amp #940-410 frosted glass stage plate, 80mm #941-460b black plast...
