Meiji Techno MX7500 Series Instrucciones de operaciones descargar pdf (Pagina 12)

-

5. Select a lower

power "scanning"

objective

like the

5X

or

the

10X

to

find the

area

of

interest

on

the

specimen

quickly.

Be sure

the

objective

"clicks"

into

place

when

you

turn

the

objective nosepiece.

6.

By

using the

coarse and fine

focus knobs

shown

above, adjust

your

specimen into

focus

with

your

left

eye

closed

(looking

only

through the right

eyetube).

With

the specimen

in focus,

close

the right

eye

you

just

used and

open the left. lf

the

specimen

is

out

of

focus for the

left eye,

adjust the

diopter

on

the

eyetube until the focus in

correct.

The

microscope is

now

adjusted for this

user. Focusing

eyetubes

allows

us

to compensate

for

users that

wear

corrective eye lenses.

lf

you

wear

glasses,

you

may want

to remove the

rubber

eyeguards.

7. The

aperture

iris

diaphragm

located

on the vertical

illuminator

can be

"stopped

down"

or

closed

somewhat

to

give

the observation

of

your

specimen more

or

less

contrast

or resolving

power.

Stopping

down the diaphragm

decreases

resolution

and

brightness

but

increases

image

contrast and

depth of

focus.

3.3

lncident

Light

Operation

-

Darkfield

1. To

engage

darkfield

mode,

pull

the

darkfield selector lever

until it

comes out with

the darkfield

stopper

in

position

(maximum

right

hand

position).

Be sure

that

both

the Field

lris

and the Aperture

lris

are

opened

completely.

2.Looking into

the

eyepieces without

a specimen on the stage, the

field

of view

appears dark.

3.When a specimen

is

placed

on the stage, features

of the

specimen

such as

scratches,

surface

particles

and depressions

will reflect

brightly

against the

dark

background.

4.Darkfield

mode is

useful for

observing

specimens with features

thal

cannol be readily

seen

under

brightfield

mode.

Possible Darkfield

Mode

Operational Problems

lf normal

adjustments

are not

getting

the results

you

expect,

check to

see if these

conditions

exist:

o

lncorrect

components inadvertently

installed

o

Components not mounted

flush

(Vertical

llluminator

to

microscope frame)

o

Dirty

or

smudged

optics

o

Aperture lris

or Field lris

are completely

closed

il

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