Interpupillary Adjustment - National DC5-420TH Instructions For Use Manual

C. There are three rocker type light controls located on top surface of microscope base.
MAIN
"I"
"T"
NOTE: USE TRANSMITTED ILLUMINATION ONLY WITH FROSTED GLASS STAGE PLATE AND BLUE
FILTER IN PLACE. HEAT GENERATED IN BASE FROM BOTTOM LIGHT WILL WARP OR DAMAGE THE
PLASTIC BLACK/WHITE PLATE. SUCH DAMAGE WILL NOT BE COVERED BY WARRANTY.
Incidental illumination can be used with either frosted glass plate or black/white plastic stage plate. The illuminators
have an intensity control located on side of base. Adjust intensity control to provide proper illumination of
specimen. The top light can also be centered on specimen by using the top light beam adjustment screw. This
allows user to select the best spot illumination required for specimen being viewed.
Transmitted and incidental illumination combined can provide extra illumination for certain objects where additional
top illumination will enhance the object being viewed.
2.

INTERPUPILLARY ADJUSTMENT

This permits each user to adjust spacing between eyepieces in order to accommodate distance between their
eyes. First make certain that the Camera Control ROD is pushed completely into the head so that field of view in
both eyepieces are illuminated. While looking through the microscope eyepieces with both eyes, grasp eyepiece
tube housings with both hands and rotate them on their axis, moving eyepieces apart or together until a full field of
view is observed and images blend into one. Interpupillary distance is now corrected for your own inter-ocular
distance and does not require further adjustment later unless another user changes this adjustment.
3. FOCUSING
A. Rotate zoom adjustment zoom knobs (located on both sides of head) so that the lowest magnification number "1"
is positioned at the black index dot located on side of 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. Viewing head is mounted on a post. The height of viewing head can be adjusted up or down on the post in order
to focus on different sized objects. Loosen the locking knob located on the locking support collar, allowing the
support collar to slide down to bottom of post. While firmly holding viewing head with one hand, loosen locking
knob located on back of focusing assembly so that head can move freely up or down on post.
E. While looking through microscope, move viewing head up or down on post until object can be seen in approximate
focus. Tighten focusing assembly locking knob. Position the support collar under the focusing block and tighten
locking knob on support collar. It is not necessary to make this adjustment every time you change objects to be
viewed, so long as the different objects are of similar thickness or height.
F. Both eyepiece tubes have knurled diopter adjustment rings used to adjust for difference in eyesight and parfocal
zoom lens. Rotate both left and right diopter in a clockwise direction to lowest position.
G. Rotate zoom adjustment zoom knobs to the highest magnification by aligning the number "4" on knob to the black
index dot on head.
H. While looking through right eyepiece with one eye, rotate focusing control knob until specimen comes into sharp
focus through right eyepiece.
I. Rotate zoom adjustment zoom knobs to the lowest magnification by aligning the number "1" on knob to the black
index dot on head.
J. Adjust the right side eyepiece diopter until the image is sharp. Do not change the focusing knob position.
K. Without changing the position of the focusing knob, adjust the left eyepiece diopter until you obtain a sharp image
in left eyepiece. The image should now be sharp throughout the zoom magnification range.
= Turns power on and off
= Turns incidental light on (top illumination)
= Turns transmitted light on (substage illumination)
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