IKA C 1 Package 1/10 - Manual (Page 4)

4
Safety instructions
DANGER
DANGER
Read the operating instructions in full before starting up
and follow the safety instructions.
Keep the operating instructions in a place where they can be
accessed by everyone.
Ensure that only trained staff work with the appliance.
The calorimeter C1 may only be used for the determination of
calorific value of solid and liquid materials according to national
and international standards (eg DIN 51900, BS 1016 T5, ISO
1928, ASTM 5468, ASTM 5865 and ASTM 4809).
The pressure vessel is integrated into the calorimeter C1. The
maximum extra energy added to the pressure vessel must not
exceed 40,000 J (select the test mass accordingly). The permitted
operating pressure of 120 bar (12 MPa) must not be exceeded.
The maximum permitted operating temperature must not exceed
50 °C.
Only fill calorimeter system C1 with oxygen to a maximum
pressure of 40 bar (4 MPa). Check the pressure setting on the
pressure reducer for your oxygen supply. Perform a leakage test
before each combustion process (see section „Leaktightness
testing with system test“).
Some materials tend to explode when combusted (e.g. due to
formation of peroxides), which could cause the decomposition
vessel to crack. The IKA
® C1 calorimeter may not be used
for testing explosive samples.
If the burning behaviour of a material is unknown, it must be
tested before combustion in the inner vessel (risk of explosion).
If you are burning unknown samples, leave the room or keep
your distance from the calorimeter.
Benzoic acid may only be combusted in its pressed form!
Flammable dust and powder must be fi rst pressed. Oven-dry
dust and powder such as splints, hay, straw etc. explode when
combusted! Always wet these materials fi rst! Highly fl ammable
liquids with a low vapour pressure (e.g. tetramethyl dihydrogen
disiloxane) must not directly touch the cotton thread!
Please pay attention to the combustion of metal-containing
substances, that the permissible total energy input is not
exceeded!
Furthermore, toxic combustion residue in the form of gases,
ashes or condensation, for example, is possible in the inner wall
of the inner vessel.
Observe the accident prevention
requirements applicable to the
activity and the work station.
Wear your personal protective equipment.
When handling combustion samples, combustion residue and
auxiliary materials, please observe the relevant safety regulations.
The following materials, for example, could pose a risk:
– corrosive
– highly fl ammable
– explosive
– bacteriologically contaminated
– toxic.
Please observe the relevant regulations when handling oxygen.
Warning: oxygen as a compressed gas is oxidising; intensively aids
combustion; can react violently with fl ammable materials.
Do not use oil or grease!
Tubes and screwed joints for oxygen must be kept free of grease.
Combustion gases are hazardous
to health, therefore the venting
hose must be connected to a
suitable gas cleaning system or extraction system.
At the end of the work period, close the main valve for the
oxygen supply.
Perform servicing work only when the equipment is
depressurised.
When using stainless steel crucibles thoroughly check their
condition after each experiment.
If the material gets thinner, the crucible may catch fi re and
damage the pressure vessel. Crucibles must not be used for
more than 25 combustions for safety reasons.
The EC Declaration of Conformity confirms that this pressure
vessel was manufactured by the Pressure Equipment Directive
97/23/EC. (Article 3, paragraph 3).
The pressure vessel has undergone a pressure test with test
pressure of 175 bar and a leakage test with oxygen at 40 bar.
Decomposition vessels are experiment autoclaves and must be
tested by a technical expert after each use. (see capture:
„ Maintenance“).
Individual use is understood here to include a series of
experiments performed under roughly the same conditions in
terms of pressure and temperature. Experiment autoclaves must
be operated in special chambers.
The pressure vessels must undergo repeated tests (internal
tests and pressure tests) performed by the technical expert. The
frequency of these tests is to be determined by the operator on
the basis of experience, type of operation and the material used
in the pressure vessel.
The declaration of conformity becomes invalid if mechanical
modifications are carried out to the experiment autoclaves or
if tightness can no longer be guaranteed as a result of major
corrosion (e.g. pitting by halogens).
In particular the Thread on the lower part of the pressure vessel
and the nut are subject to considerable stress and must therefore
be checked regularly for wear. (see figure„Description of the
system components“)
The condition and function of the seals must be checked and
ensured by way of a system test (see capture „system check“).
Check the seals for damage before each use (see chapter
„Maintenance“.
If the maintenance, and especially the pressure testing, is
not performed or is performed incorrectly, there is a risk the
decomposition vessel may burst or an uncontrolled internal fire
may occur at the electrodes which could burn away the seals
(oxyacetylene torch effect), thus posing a risk to life and limb!
Only technical experts may perform pressure tests and service
work on the decomposition vessel.
C1 092014