National 106, 106-LED, 109, 106-L, 109-L Instructions Manual

National Optical & Scientific Instruments Inc.

6508 Tri-County Parkway

Schertz, Texas 78154

Phone [phone] Fax [phone]

INSTRUCTIONS FOR MODELS

106, 106-L, 106-LED
109, 109-L, 109-LED

ELEMENTARY COMPOUND MICROSCOPES

Copyright © 1/2/01

National Optical & Scientific Instrument Inc.

All models in this series have the same basic features, lenses, magnification and methods of operation. The only

Models 106 and 109 supplied with

Models 109, 109-L, 109-LED

Ocular lens (eyepiece)

Eyepiece tube

Body tube

Objective turret (nosepiece)

Objective lens

Shaft of illuminator
Illuminator housing

Disc diaphragm

Stage clips

Base

Inclination joint

Stage

Arm

Focusing knob

Tension adjustment collar

arm of microscope

Rack stop screw

Rack stop locking nut

Models 109, 109-L,109-LED

Fine focusing

LED illuminator for Models

L and

differences are:
106, 109: Illumination is supplied by a plano-concave mirror.

106-L, 109-L: Illumination is supplied by a substage electric illuminator (110v 15 watt).
106-LED, 109-LED: Illumination is supplied by a substage LED illuminator.
106, 106-L, 106-LED: Have standard coarse focusing only.
109, 109-L, 109-LED: Have both coarse and fine focusing.

feature inclined eyepiece.

between focus knob and

housing

Models supplied with substage
electrical illuminator: 106­109-L

substage mirror.

106-L Illustrated

feature coarse and fine focusing.

knob

106-LED and 109-LED

Thank you for your purchase of a National microscope. It is a well built, precision instrument and carefully checked to assure
that it reaches you in good condition. It is designed for ease of operation and years of carefree use. The information in this
manual probably far exceeds what you will need to know in order to operate and maintain your microscope. However, it is
provided to answer questions, which might arise, and to help you avoid any maintenance expense that may be unnecessary.

Carefully read instructions before operating microscope. Nomenclature used to describe components and controls are
identified on opposite page of the manual.

UNPACKING

Do not discard Styrofoam container or packing materials. Save in case instrument needs to be transported or shipped

for repairs. Remove microscope and dustcover from container. Remove all tape and packing material used to protect
microscope during shipment. Make certain lens surfaces do not come in contact with dirt, fingerprints or oil. Damage of lens
surfaces occurs when they come in contact with such contaminants, and image quality is reduced.

DESCRIPTION OF COMPONENTS

A. OCULAR LENS (eyepiece): Lens closest to the eye, magnifies the primary image formed by the objective lens
B. OBJECTIVE LENS: Lens closest to the specimen, forms the first magnified image of the specimen.
C. OBJECTIVE TURRET (nosepiece): Revolving turret designed to hold objective lenses, permits changes of magnification

by rotating different powered objective lenses into optical path.
D. STAGE CLIPS: Two locked-on clips hold specimen slide in place on stage.
E. STAGE: Platform of the microscope where the specimen slide is placed on stage.
F. DISC DIAPHRAG M: Rotating disc located below stage, with 6 holes of various apertures, designed to help achieve

optimum resolution of the objective lens. Smaller apertures used for lower magnifications, and larger apertures used for

higher magnifications.
G. SAFETY RACK STOP: When properly adjusted, controls maximum downward travel of body tube while focusing,

prevents higher power objectives from breaking specimen slides, prevents damage to objective lenses. This safety rack

stop has been pre-adjusted at the factory.
H. FOCUSING KNOBS: Focusing knobs located on each side of arm, when turned, raise or lower body tube to bring

specimen into focus.
I. Model 109 has coarse focus knobs described above, plus fine focus knobs (smaller knobs) located on both sides of arm

right below coarse focus knobs. These permit precis e adju st ment for sharp er focu s of imag e.
J. ILLUMINATION: Depending on model purchased, microscope is provided with either a plano-concave mirror or built-in

electrical illuminator.

1. Mirror provides illumination of specimen by reflecting light from an artificial source or natural light.

2. Substage ele ctri cal ill uminator provides constant, reliable pre-focused illuminat ion.

3. Sub-stage cordless LED illuminator provides illumination equal to 20 watt tungsten bulb. Features ON/OFF switch
with rheostat intensity control, rechargeable AA Nickel Hydride batteries and auto recharger.

OPERATION

A. Always carry microscope by grasping arm with one hand and placing other hand under base.
B. Place microscope directly in front of you in a manner which permits you to comfortably look into the eyepiece. Position

the microscope with the arm facing you so that focusing knobs are most convenient to reach, and you do not block light
if using a model that has a mirror for illumination.

C. Note that model 106 can be tilted at the inclination joint to provide comfortable viewing angle. Model 109 has a special

inclined eyepiece so that it is not necessary to tilt microscope at inclination joint.

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