Thames & Kosmos Chem C1000 handleiding
Handleiding
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To remove the chemicals from the supply
bottles, use the double-headed measuring
spoon (part #22). When the instructions refer
to “1 spoonful” or “1 large spoonful,” that
means one level scoop from the larger end, and “1
small spoonful” means a level scoop from the small end.
“1 spoon tip” means about half of the smaller end. You must wash
and dry the double-headed measuring spoon after each use, since otherwise you will
introduce trace amounts of the chemicals into other vials.
When you want to add liquids drop by drop, use the dropper pipette (part
#13). The illustration to the left shows how to use it. Squeeze the top bulb of the
pipette between your thumb and forenger and dip the end into the liquid. As soon
as you release pressure on the bulb, the liquid rises into the pipe. Then, you can
release individual drops one by one by applying gentle pressure on the bulb. After
use, clean the pipette by lling it repeatedly with water, shaking, and emptying.
You won’t need the funnel (part #12) just for lling liquids (e.g., the litmus
solution), but above all for ltering. You will learn how that works right o the bat in
the rst experiment. You will need the lter paper sheets included in your kit. If you
run out of lter paper sheets, you can also use round white coee lters for this, or
you can trim yourself some round lters from white lter bags.
Working with the angled glass tube
Placing the angled tube into the rubber stopper with hole and removing the tube
from the stopper is not as easy as it looks. Ask an adult to help you with it.
First hold the hole in the stopper and the angled tube under running water. Then
twist the tube into the hole, preferably back and forth, and do not force it by any
means. Hold the angled tube as shown in the illustration. You can give it extra
protection by using a thick cloth to hold onto the glass tube.
It is often more dicult to take the angled tube out of the stopper than
it is to put it in. To do this, gently pull the glass tube to both sides to form a small
gap between the stopper and glass tube so that water can penetrate into it. Do the
same thing on the opposite side of the stopper. Hold the glass tube right above the
stopper and pull it out of the hole while constantly twisting it back and forth. It is
essential that you follow these instructions!
12
squeeze
release
light
squeeze
!
Broken glass tubes can cause unpleasant cuts and wounds. If an
injury occurs: First Aid 7 (inside front cover).
How the dropper
pipettes work.
The angled tube is not pushed into the
stopper (a and b) but twisted in (c). Also,
hold the long legs of the angled tube close
to the stopper.
The double-headed measuring spoon
1 small spoon
NOT like this
NOT like this like THIS
1 large spoon
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Chem C1000 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 11336 MB |
