Cassini C-900M Technisches Handbuch

8

All I can see is a partial circle of light. Why?

To see your sample properly, you need to have even light shining up through the

slide. If you are using the mirror for light, try gently moving it about while looking

through the microscope until you see an evenly lit full circle.

I have a very thin sample on my slide, but I can’t see any detail.

First, make sure that the image is in sharp focus by adjusting the focusing knobs. If

the problem still exists you should add a drop of dye or stain to the sample. Stains

make hard-to-see objects like plant cells stand out.

BATTERY INFORMATION:

This unit uses 2 AA 1.5 volt batteries. Always use

fresh batteries. Do not mix old and new batteries. Do not mix batteries of different

types. Remove exhausted batteries and dispose of them properly. If this toy will not

be used for an extended term please remove the batteries. Do not try to recharge a

non-rechargeable battery. Rechargeable batteries are to be removed from the toy

before being charged. Rechargeable batteries are only to be charged under adult

supervision. Only batteries of the same or equivalent type as recommended are to be

used. Do not take a battery apart. Do not short-circuit the terminals. Do not dispose

of batteries in fire - they may explode.

ARE

NSTRUCTIONS

Wipe the microscope body with a damp cloth; then dry with a clean, soft

cotton

cloth. To clean the lenses, gently wipe them with cleaning cloths or wipes

specifically designed for camera or binocular lenses.

Product made in China

Manual printed in China

Instructions for the

WARNING! Only for use by children over 8 years old.

Only for use under the supervision of an adult.

27

ELCOME TO THE

ICROSCOPIC

ORLD

We take great pleasure in introducing you to the world of the microscope. Your new

microscope is an instrument with lenses for making very small objects appear much

larger so they can be studied. There are millions of tiny living plants and animals that

can be easily seen with your microscope.

In today’s technological world every science from the most fundamental biology to

the highly skilled field of astro-physiology use microscopes. Microscopes are used by

geologists for studying rocks and minerals, archaeologists who study very old items,

police departments who can study very small pieces of evidence, and even by as-

tronomers when they study fallen meteorites. Your microscope will let you see the

basic building blocks of life on Earth.

ARTS OF

OUR

ICROSCOPE

Eyepiece Body tube

Revolving turret Focusing knob

Objective lens Arm

Stage Clip

Mirror

Illuminator lamp

(reverse side of Base

the mirror) (batterycase)

You should replace the water with clean salt water every three or four days.

Use a

magnifying glass to study the brine shrimp. Start with the dried eggs,

then study an egg that has been in the salt water for a few hours. You can

then

study a freshly-hatched larva, and finally a mature brine shrimp.

You can carefully place a wet egg, larva, or adult brine shrimp on a blank

slide for

study under low power on your microscope.

If you have brine shrimp remaining in your first container, and you have fish

in a bowl

or aquarium, you can feed the shrimp to your fish. YOU MUST

PLACE THE BRINE

SHRIMP IN FRESH WATER BEFORE YOU PLACE

THEM IN A FISH TANK AS

FOOD. THIS IS BECAUSE TOO MUCH SALT

CAN INJURE OR KILL MANY FISH

TYPES.

ORE

ELPFUL

INTS

Always use the lowest magnification to begin a sample study. Higher

magnifications may not be better, as they are usually less bright.

Look through the microscope with both eyes open. This may seem

awkward at first, but will soon feel natural. You will find that keeping

both eyes open is less stressful.

Keep your work area clean and organized.

Wash your hands beforeand after each session.

FAQ

– F

REQUENTLY

SKED

UESTIONS

What can I see with my microscope?

You can see thousands of things that are difficult or impossible to see with

your eyes. You can see tiny plants and animals. You can observe plant and

animal cells. You can see the differences between different plants, different

papers, different fibers and hairs from different people. You can study crys-

tals, rocks, and minerals. The uses for your microscope are practically end-

less.

What is meant by power?

Power is a measure of the seeing ability of your microscope. It is really a

short way of saying “magnifying power.” Your microscope has three powers. They

are 300X (pronounced “300 times”), 600X, and 1,200X. This means that your micro-

scope can magnify the view of a sample so that it appears 300 times, 600 times, or

1,200 times larger than the way you see it with your eyes alone.

I look through my microscope and all I see is darkness. Why?

This could be because the mirror is not positioned properly to aim light up into your

microscope. Or maybe the sample you are looking at is too thick so that the light can-

not shine through it.

63

AKING A

ERMANENT

LIDE

Start with a clean slide and slide cover. Take care when handling these slide

covers.

Follow Steps 2 and 3 above.

Before placing the slide cover over your sample add several drops of gum

media, Canada balsam, or transparent glue.

Place the cover glass gently over the sample and gently squeeze out any air

bubbles.

Place your new slide in a safe place and let it dry for a day.

Now you can observe your slide.

RINE

HRIMP

ATCHERY

Brine shrimp are tiny swimming animals that are members of the crustacean family.

Crustaceans have shells and antennae. Brine shrimp‘s cousins are crabs, lobsters,

and other shrimp. Brine is water with salt in it, like sea water. So brine shrimp live in

salt water.

This set includes a shrimp hatchery, sea salt, and dried brine shrimp eggs. The eggs

should remain alive for several years if they are kept dry, and not allowed to freeze or

get too warm. You will need a clean container and some yeast (yeast used for bread

making is inexpensive and easy to locate. Ask your parents if you have any yeast in

the kitchen, and if you may have a small amount.

Into a large, well-washed plastic bottle (such as a 1.5 or 2 liter soda pop bottle, or a 1

or 2 quart milk jug, pour 0.95 liters (1 U.S. Quart) of tap water. Let this water stand at

room temperature for one day to allow chlorine in the water to dissipate.

After the water has been standing for a day, check the temperature. It should be be-

tween 70º and 80ºF (21º and 26ºC). Place about one sixth of the brine shrimp eggs in

the salt water and leave the container alone for between 24 and 48 hours. The eggs

will hatch into nauplius larvae. These nauplii only have one eye. In one to three days

these larvae will look like small brine shrimp, with two eyes!

Using a pipette or eye dropper, place some of the newly hatched larvae into one of

the shrimp hatchery chambers.

Place some of the salt water into the next chamber of your shrimp hatchery. Add a

few grains of yeast to this chamber. Transfer some of the brine shrimp from the first

chamber into the chamber with the yeast.

The yeast acts as food for the larvae, and helps them grow. You can also use green

algae from a fish tank, or even a few drops of raw, liquid egg yolk. If you do not feed

the larvae they will live for about three days. If you feed them and care for

them they can live up to three months.

ONTENTS

300X/600X/900X microscope with mirror and electric

light

1 Petri dish with 1 cover

1 Shrimp hatchery with 1 cover

5 Prepared plastic slides

7 Blank slides

1 Test tube with lid

1 Scalpel

1 Tweezers

1 Stirring rod

10 Slide labels and 10 static slide labels

1 Vial of sea salt

1 Vial of brine shrimp eggs

1 Vial of gum media

3 empty vials

Instructions

Carrying case

Read all instructions before use. Follow them and keep them for future reference.

Keep small children and animals away from any experiments or projects. Store your

microscope set out of reach of small children. Eye protection is not included.

Your microscope has been designed to provide hours of enjoyment. Have fun! Al-

ways wash your hands carefully after handling any samples and always dispose of

any samples in a safe manner. When working with samples, keep your hands

away from your mouth and eyes.

ELPFUL

INTS

The most important parts of your microscope are the lenses. Handle them with

care. If the lenses are dirty or dusty you can clean them with a soft cotton cloth

or a special lens cleaning tissue. Do not wipe them with a finger or a regular

facial tissue.

Protect your microscope from dust and moisture by always storing it in its box

or case.

ETTING

TARTED

First, turn the microscope over. Insert two AA alkaline batteries in the base of the

microscope. In order to remove the bottom cover of the microscope you will need a

Phillips head (+) screwdriver. Insert the batteries as shown, making sure that the

(+)and (-) terminals are properly identified. Replace the bottom cover and reinsert

the screw. Do not over-tighten.

45

Place the microscope on a flat surface near a bright light, or in the daytime, a window.

Locate the mirror and adjust the angle so that when you look into the eyepiece you

see a bright circle of light. Do not point the mirror toward the sun as eye damage

may result. If there is no bright light available or, if the room lighting is poor, you can

use the microscope’s electric illuminator. To turn on the illuminator, flip the mirror

over so that the light bulb is aimed upward. The light will come on by itself. Look

through the eyepiece and adjust the angle of the light until you see a bright circle.

Once you can see a bright light circle in the eyepiece your microscope

is ready for use.

Choose one of the prepared sample slides from your set. Place it un der the two

spring clips on top of the stage.

Next, choose the magnifying power you want to use. Your microscope can provide

magnifying powers of 300X, 600X, and 1,200X.

Remember that the longer objective lenses provide the higher powers. Most ob-

serving is done at low power.

To change the magnifying strength turn the revolving lens turret until you hear a

click.

Turn the focusing knob until the objective lens is almost touching the slide.

Don’t let the lens touch the slide as you may break the slide and damage the

lens. Now look through the eyepiece and slowly turn the focusing knob back

until you see the sample clearly.

OW TO

AKE A

REPARED

LIDE

Samples for examination should be very thin so that light can pass through

them. If the sample is too thick it will appear dark in the microscope.

Cloth fibers, pollen, dust, or salt crystals will be easy to see and make good

samples for beginners to observe.

If the sample is very thin and clear a drop of dye may make details show

more clearly. Methylene blue dye can be obtained from an aquarium supply

store.

You can transfer a drop of dye from the bottle to your slide with the pipette.

Be careful with dyes as they can stain clothing, furniture, or carpets.

AKING A

EMPORARY

LIDE

Wipe the slide clean.

Prepare a thin sample. You may have to slice it with a scalpel or a

razor blade. Be very careful. Ask for adult help.

Pick up your sample with the tweezers and put it on the center section

of the slide. Add one drop of water. Or, if needed, you can now add a

drop of dye.

Gently place a temporary slide cover (plastic) over the sample, being

careful not to allow any air bubbles in.

Remove any excess water or dye with a piece of paper towel by press-

ing it down gently over the slide cover.

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