Olympus CH30 Anleitung Handbuch - Seite 17

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Fig. 25

CH30/CH40

sin te Coarse Adjustment

Knob Tension (ig.25)

1. Tho coarse adjustment knob tension is preadjusted for easy use.

However, i f desired, one can change the tension using the tension

adjustment ring O. Applying a fla-bladed screwdriver

to any of the

'grooves @ on the circumference of the ring and turning the ring in

the direction of the arrow increases tension, and ice versa

2 . Tho tension is too low the stage drops by seli or focus is quickly

lost after adjustment with the fine adjustment knob G. n this case,

tum the ring D in the direction of the arrow to increase tension

(EB Pre-focusing Lever

(0.29)

The pre-focusing lever ensures that the objective does not come in

contact with the specimen and simplifies focusing, After focusing on

the specimen with the coarse adjustment knob, turn this lever ©

clockwise in the direction of the arrow to set a lower limit on coarse

adjustment movement

focusing lever. Accordingly, after using the coarse adjustment knob

to lower the stage for changing specimens or applying immersion oil

{see Section 5-8), refocusing is easily accomplished by rotating the

coarse adjustment knob to reach the pre-focusing position, then

making fine adjustments with the fine adjustment knob.

# When not required, leave the pre-focusing lever unlocked.

Use of Immersion Objectives

(Fig. 27)

1 . Focus on the specimen with a low power objective.

2 . Place a drop of immersion oil provided) onto the specimen at the area

to bo observed.

3. Turn the revolving nosepiece to engage the immersion objective,

then focus using the fine adjustment knob.

+ Since any bubbles in the oil wll impair the

tho oil is free of bubbles.

a . To check for bubbles, remove the eyepiece and fully open the

field and aperture iris

diaphragms, then look at the exit pupil of

t h e objective inside the observation tube. (The pupil should

appear round and bright.)

b. To remove bubbles, rock the nosepiece slightly to move the oil

immersion objective back and forth a few times.

Q if the condenser marking shows a numerical aperture (NA) of 1.0 or

more, the number applies only when oil is present between the slide

glass and the top surface of the condenser. When oil is not present,

the NA is about 0.9.

4. After use, remove oil from the objective front lens by wiping with

'gauze slightly moistened with an ether (7 parts) / alcohol (3 parts)

mixture or with EE-6310,

+ Using too much alcohol can dissolve the lens adhesive.

A Caution on Using the Immersion Oil:

if the immersion oil comes into contact with your eye or skin,

tely tako the following action.

For aye: R i n s e

with clean water (for more than 15 min).

For skin: Wash with soap and water.

ho appearance of the eye or skin changes or pain continues,

please consult your doctor.

rage, make sure that