User guide

3
Instruction Sheet
3B SCIENTIFIC® PHYSICS
U45052 Vacuum set for students
8/03 ALF
®
Equipment set for practical experiments introducing the
basics of vacuum physics. Subjects that may be studied
experimentally may include, for example:
• Determining the mass of air evacuated and its density.
• Effect of air pressure on a partially inflated balloon
and a miniature bellows.
• Lowering of boiling point of liquids by reduced air
pressure.
1. Safety instructions
• When attaching hoses do not use excessive force. Do
not exert more than the pressure of your fingertips
on the hose connectors when joining them together.
• To clean, use only warm water with a small amount
of washing-up liquid. Never use solvents.
2. Description, technical data
A complete set of equipment consisting of an experi-
ment plate incorporating a rubber ring and a bell jar that
can be joined together with a recipient to enclose a coarse
vacuum. The bell jar is equipped with a hose connection
for attaching a plastic hose with a built-in valve. Evacua-
tion is achieved using a simple hand pump. Beakers,
bellows and balloons are provided for the experiments.
All components are made of transparent plastic.
Experiment plate: 70 mm Ø approx.
Bell jar: 90 mm high approx.
2.1 Scope of delivery
1 Experiment plate with sealing ring
1 Bell jar
1 Hose with valve
1 Hose with T-piece and valve
1 Simple hand pump in case
1 Mini bellows
2 Balloons
2 Beakers
2 Plastic pipettes
3. Operation
3.1 Set-up of experimental apparatus
• Connect the hand pump to the bell jar via a hose as
shown in the illustration.
• Slip the hose connectors inside one another and
secure by turning with slight pressure from the fin-
gertips.
1 Hose with T-piece and valve
2 Hose with valve
3 Recipient (Experiment plate and bell jar)
4 Hand pump in case
5 Beaker
6 Pipettes
7 Mini bellows
8 Balloon
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