Risk phrases:
R 11-36-67
Highly flammable. Irritating to eyes. Vapour can make
drowsy and dazy.
Safety phrases:
S 7-16-24/25-26-39
Keep container tightly closed. Keep away from sources of
ignition – No smoking. Avoid contact with eyes and skin. In
the case of contact with eyes, rinse immediately with plenty
of water and seek medical advice. Wear eye/face
protection.
First aid:
Immediately rinse contacted skin or eyes, with
eyelids open, with plenty of water. On eye injury, seek
medical advice immediately. In case of accident or if you
feel unwell, seek medical advice immediately. After
inhalation: Fresh air, keep airways free. On respiratory
distress: Transport to doctor in half-sitting position.
Waste disposal:
Collect combustible halogen-free organic
solvents and solutions in a container labelled for them and
pass to appropriate waste disposal.
8 TECHNICAL SPECIFICATIONS
Active layer
45 cm x 45 cm x approx. 1 cm
Chamber (B x D x H)
64 cm x 64 cm x 60 cm
Working liquid
2-Propanol, highest chemical purity
(isopropyl alcohol)
Tank volume
2 litres
Illumination
Integrated fluorescent lamps
Time switch
7 x 24 hours
(weekly program)
Mains supply
The instrument corresponds to protection class I. It.is only to
be connected to a socket with an earth lead connection.
Connecting voltage
see type plate
(+6%/-10%)
Mains frequency
50/60 Hz
Power consumption
900 VA
Fuse
see type plate
Weight
80 kg
9 CLOUD CHAMBER AND ACCESSORIES
Large Diffusion Cloud Chamber
09046.93
2-Propanol, 1 litre
30092.70
Artificial radioactive sources on request.
The right of technical alterations is reserved.
10 NOTES ON THE GUARANTEE
We guarantee the instrument supplied by us for a period of
24 months within the EU, or for 12 months outside of the EU.
Excepted from the guarantee are damages that result from
disregarding the Operating Instructions, from improper
handling of the instrument or from natural wear.
The manufacturer can only be held responsible for the
function and technical safety characteristics of the
instrument, when maintenance, repairs and alterations to the
instrument are only carried out by the manufacturer or by
– To replace the heating segments, first slide them back on
the glass plate, then again lengthen the wires of the
heating segments with an external source of current (as
described above), so that finally the leaf springs can be
inserted between the tracks and the edge of the glass
plate to maintain the necessary mechanical tension in
the heating wires.
Important!
Because of unavoidable size tolerances in the covering glass
plate, it is absolutely necessary to ensure that each of the two
heating circuits is replaced in its original position.
Assembly
After cleaning the glass covers, replace them in the same
way as they were taken off, but in the reverse order.
C: Changing lamps
Important!
Disconnect the chamber from the mains supply
(disconnect
the mains plug!)
before changing lamps.
To replace a blown lamp, unscrew the side cover plates with
the screwdriver provided. After lamp replacement take care
that the grounding conductor is properly connected when
screwing the side cover plates back on.
D: Alcohol consumption
The cloud chamber consumes very little alcohol, but despite
of this, the stock of alcohol and the dropping speed should be
regularly checked, in particular when the chamber is in
permanent operation or in regular use with a weeklong
programme.
Use exclusively 2-propanol (isopropyl alcohol) for topping
up.
7 NOTES ON HANDLING ISO-PROPANOL
The handling of the alcohol iso-propanol (isopropanol, 2-
propanol, propan-2-ol) is subject to the same rules for the
avoidance of danger as is the handling of other chemicals,
reagents and dye solutions. It is natural that such substances
must be handled cautiously and carefully so that neither
students and teachers nor others are exposed to
unnecessary health hazards.
When handling iso-propanol, therefore, the directions must
be observed that are given in the current up-dated data sheet
(acc. to EC Directive 91/155/EEC), the valid accident
prevention regulations and the directions that apply to the
particular workplace.
Some of the most important handling regulations and general
rules of behaviour are named here without any claim to
completeness:
2-Propanol is a clear, highly flammable and somewhat oily
liquid with an odour that is reminiscent of a mixture of
ethanol and acetone. It mixes in all proportions with water
and most organic solvents. The vapour from iso-propanol
can form explosive mixtures with air.
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