must be operated in special chambers / protectiv device.
Repeated tests
The decomposition vessel must be subject to repeated tests
(internal tests and pressure tests) by a
person with professional
training
. The intervals between tests must be determined by the
operator based on experience, operating manner and the material
used in the decomposition vessel.
The guarantee loses its validity if mechanical modifications
are made to the experiment autoclaves or if stability can no
longer be guaranteed as a result of heavy corrosion (for exam-
ple holes eaten in it by halogens).
The threading on the body of the decomposition vessel and cap
screw in particular are subject to a high level of mechanical stress
and must therefore be monitored regularly for wear and tear.
The condition of the seals must be checked for functionality must
be ensured by means of a test for leaks.
(see the sections entitled ”Care and maintenance; Leak test”)
Pressure tests and service tasks on the decomposition vessel
must only be performed by
persons with professional training
.
We recommend that the decomposition vessel be sent
intoour factory for inspection and repairs if necessary after
either 1000 experiments or after one year or, depending on
the application, even sooner than this.
Definition of person with professional training
A person with professional training as defined in these operating
instructions is someone
1. whose training, knowledge and experience gained through
practical activities ensures that that person will perform the tests
in a proper manner.
2. who is sufficiently reliable
3. who is not subject to any instructions in terms of testing activity
4. who is equipped with suitable testing equipment if necessary
5. who can provide suitable proof demonstrating compliance with
the requirements listed in 1.
Operating pressure containers
National regulations and laws for operating pressure containers
must be observed!
11
Combustion residue, auxiliary materials
In addition, toxic residues of combustion are possible in the form
of gasses, ash or precipitates on the inner wall of the decomposi-
tion vessel, for example.
Observe the accident prevention requirements applicable to
the activity and the work station. Wear personal safety equip-
ment.
When handling combustion samples, combustion residues and
auxiliary materials, the appropriate safety requirements must be
observed. The following are examples of substances that may
cause dangers:
corrosive, easily flammable, capable of exploding
contaminated with bacteria, toxic
Oxygen
When working with oxygen, observe the appropriate require-
ments.
Danger warning: As a compressed gas, oxygen promotes combu-
stion, supports combustion intensively and may react violently
with combustible substances.
Do not use any oil or grease!
Using a crucible made of stainless steel
When using crucibles made of stainless steel, their condition
should be carefully checked after every experiment.
A reduction in the thickness of the material may cause the crucible
to burn and may damage the AOD 1.1 decomposition vessel.
For reasons of safety, crucibles must not be used any more after
a maximum of 25 combustion procedures.
Specification of the decomposition vessel:
The decomposition vessel is manufactured in accordance with the
regulation for pressure vessels 97/ 23/ EC. The decomposition
vessel has been subjected to a pressure test at a test pressure of
280 bar and a leak test with oxygen at 30 bar.
The AOD 1.1 decomposition vessel is an experiment autoclave
and must be tested by a professionally trained person each time
before they are used.
An individual application is understood here to mean a series of
experiments that are performed under roughly the same conditi-
ons in terms of pressure and temperature Experiment autoclaves
AOD1.1 18.12.2002 15:16 Uhr Seite 11
