Safety Instructions - IKA C 1 Operating Instructions Manual

Safety instructions

Read the operating instructions in full before start-
ing 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 C 1 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 C 1. 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 142 bar (14.2 MPa) must not be exceeded.
The maximum permitted operating temperature must not exceed
50 °C.
Only fill calorimeter system C 1 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 C 1 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 first pressed. Oven-dry dust and powder
such as splints, hay, straw etc. explode when combusted! Always
wet these materials first! Highly flammable 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 sam-
DANGER
ples,
auxiliary materials, please observe
the relevant safety regulations.
The following materials, for example, could pose a risk:
- corrosive
- highly flammable
- 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 flammable materials.
Do not use oil or grease!
Tubes and screwed joints for oxygen must be kept free of grease.
combustion residue and
Combustion gases are hazardous
DANGER
to health, therefore the venting
hose must be connected to a suita-
ble gas cleaning system or extrac-
tion system.
Caution! In case of failure Error 04
DANGER
"Min.Temp.Diff." the combustion
chamber could be hot after an ig-
nition/combustion, even though
the message "No temperature in-
crease!" is displayed.
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 condi-
tion after each experiment.
If the material gets thinner, the crucible may catch fire and dama-
ge 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 ves-
sel was manufactured by the Pressure Equipment Directive
2014/68/EC. (Article 3, paragraph 3).
The pressure vessel has undergone a pressure test with test pressure
of 203 bar (20.3 MPa) 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 experi-
ence, 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 corro-
sion (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 sys-
tem components").
The condition and function of the seals must be checked and en-
sured 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
DANGER
the pressure testing, is not per-
formed or is performed incorrectly,
there is a risk the decomposition ves-
sel may burst or an uncontrolled in-
ternal fire may occur at the elec-
trodes 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.
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