Meiji Techno EM-20 Series Manuale utente

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Table of Contents

1) Introduction

2-3) Construction of the microscope

4-5) Functions of the microscope

6) Preparing the microscope for use

7-9) Working with the microscope

10-11) Maintenance and cleaning

Introduction

With your purchase of an MT-10 series range stereo

microscope you have chosen for a quality product.

The EM-20 range microscopes are developed for use

at schools and laboratories.

The stereo microscope consists of two separate

microscope tubes which are combined as a unit, in

order to focus them simultaneously on the object.

Each tube has prisms, achromatic objectives and a

wideeld eyepiece in order to obtain a large, at eld

of view. Both eyes are looking at the object under a

dierent angle to reach a deep stereoscopic image.

The maintenance requirement is limited when using

the microscope in a decent manner.

This manual describes the construction of the

microscope, how to use the microscope and

maintenance of the microscope.

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Construction of the Microscope

The names of the several parts are listed below and

are indicated in the picture on the next page:

A) Eyeshade

B) Diopter adjustment

C) Revolver (objective changer)

D) Illumination adjustment

E) Object clip

F) Stage plate

G) Stand foot with built-in illumination

H) Pillar

I) On/o switch

J) Incident illumination

K) Focusing knob

L) Handle

M) Prism housing

N) Wideeld eyepiece

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Functions of the Microscope

The stand consists of a stand arm (C), stand base and an object stage (G).

Tube

The EM-20 models are equipped with a 45 degrees inclined tubes.

Optical specications of the MT-30/MT-90 series range

All models are equipped with paired wideeld 10x eyepieces (N).

Depending on the model there are:

1x/3x objectives mounted in one revolving nosepiece.

2x/4x objectives mounted in one revolving nosepiece.

1x/2x/3x objectives mounted in one revolving nosepiece.

1x/2x/4x objectives mounted in one revolving nosepiece.

Total magnication is calculated by multiplying the magnication of the eyepieces with the

magnication of the objectives. The eyepieces are locked in the tubes by means of a small

screw.

Object stage

The EM-20 stereo microscopes are equipped with an transparent object stage and 2 object

clips. All models have a transmitted and a incident LED illumination.

Focusing

With the focusing knobs (K) the object can be sharply focussed.

The working distance (distance between front of objectives to top of object) is about 60 mm.

Revolver of Dual Magnication models

These models are equipped with 2 pairs of achromatic objectives mounted in one revolver

(objective changer). By turning this nosepiece another magnication is set. Turn the

nosepiece untill it clearly “clicks” into position.

Revolver of Triple Magnication models

These models are equipped with 3 pairs of achromatic objectives mounted in one revolver

(objective changer). By turning this nosepiece another magnication is set. Turn the

nosepiece untill it clearly “clicks” into position.

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Illumination

All models have a transmitted (diascopic) and incident LED illumination.

With use of the potentiometer switch (D) the illuminators can be adjusted in intensity and

both illuminations can be used simultaneously.

With the switch (I) the illuminations can be switch IN and OUT.

Tension adjustment

When the system lowers itself by its own weight, the tension of the focusing knob (K)

should be adjusted. This is done by turning the two focusing knobs in opposite (clockwise or

counterclockwise) directions

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Preparing the Microscope for Use

Take the stereo microscope out of its packing and put

it on a rm stable table

Insert the plug of the power supply adapter into the

mains supply and switch on the illumination with

the On/o switch (I) and place the eyeshades onto

the eyepieces. Sit comfortably down behind the mi-

croscope and take a relaxed position while viewing

through the eyepiece.

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Working with the Microscope

• Place an object onto the object plate and adjust the height of the holder randomly

with the screw (P) at the backside of the stand.

• Adjust the interpupillary distance by moving both prism housings (M) towards each

other until one round image is seen with both eyes.

• Focus the specimen by means of the focusing knobs (K) on both sides of the holder.

• For normal observation both tubes should have the same length, but to adjust any

dierence between the two eyes, proceed as follows: focus sharply on a at specimen, only

using the right eye, looking through the right eyepiece. Now look through the left eyepiece,

only with the left eye and focus the specimen with the diopter adjustment ring on the left

tube.

EM-20 Series

Turret Stereo

INSTRUCTION MANUAL

Maintenance and Cleaning

Always place the dustcover over the microscope after use. Keep the eyepiece

and objectives always mounted on the microscope to avoid dust entering the

instrument.

Cleaning the optics

When the eyepiece lens is dirty it can be cleaned by wiping a piece of lens paper

over the surface (circular movements). When this does not help put a drop of

xylol or alcohol on the lens paper. Never put xylol or alcohol directly on the lens!

When dirt is clearly visible in the eld of view it resides on the lowest lens of the

eyepiece. By using the Allen-key the eyepiece can be removed from the tube.

Clean the outside of the lens.

In case there is still dust visible please check if the dust is in the eyepiece by

turning it. If this is the case remove the lowest lens carefully from the eyepiece

and clean it.

Caution

• Cleaning cloths containing plastic bers can damage the coating of the

lenses!

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