Combustion Procedure; Cleaning The Decomposition Vessel; Halogens C 5012; Replacing The Ignition Wire - IKA C 5010 Mode D'emploi

Combustion procedure

For the decomposition vessel charging procedure with fuel samples and
the general procedure for performing combustion please refer to the
relevant standards and the operating instructions for the IKA C 5000
control / duo-control calorimeter system or C 2000 and C 200.
When working with the IKA C 5000 und C 2000 systems, filling of the
decomposition vessel takes place in the device itself; a filling station is
used with the C 200 and C 248.
For the C 5000, venting of the decomposition vessel takes place in the
device itself; for the C 2000 and C 200 the venting button supplied
with the device is required.

Cleaning the decomposition vessel

After each combustion the condensate has to be cleaned from all of
the parts of the decomposition vessel which come into contact with the
combustion products. It suffices to wipe out the parts with an absorbent,
non-fibrous cloth. Combustion residues in the crucible, e.g. carbon black
or ash are removed in the same manner.
The decomposition vessel may not be mechanically cleaned under
any circumstances if it is not capable of being cleaned in the manner
described (e.g. due to burn-in or pitting).
In such cases please contact your competent service center or send
in the decomposition vessel to the factory for inspection and cleaning.

Halogens C 5012

Pitting which severely impairs operator safety may be caused on the inner
surfaces of the decomposition vessel from combustion products which
contain halogen. If the halogen content of the samples is significantly
greater than the trace range, then decomposition vessel C 5012, which is
specially designed for such applications, shall be used.
To enable the quantitative evaluation of halogens and sulphur, the
C 5012 decomposition vessel is preconditioned before shipment. This me-
ans that the inner surfaces and the fittings of the decomposition vessel
are catalytically activated by means of a patented procedure..
Parts thus treated are recognizable because of their opaque, tarnished
and partly spotty surfaces. This appearance of this surface is intentional
and should not be confused with traces of wear.
This state is important for the following analysis and may not be treated
with brushes or other hard materials. Wiping and drying should be done
using a soft cloth.
The C 5010 decomposition vessel may not be used
for such applications because of the safety risk and
insufficient analysis results.

Replacing the ignition wire

The C 5010 and C 5012 decomposition vessels are equipped with a fixed
ignition wire. Since the ignition wire is subjected to a high degree of
material stress during combustion, it should be replaced after about 100
tests at the latest. However, this largely depends on the type of samples
fired.
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The ignition wire must also be replaced if corrosion occurs, in order to
prevent drift in the results.
The ignition wire from the C 5010 and C 5012 decomposition vessels are
not interchangeable because of the difference in the alloys.
Leakages of the decomposition vessel are the results (see the sections
entitled „Leadkage test").
Leakages at the decomposition vessel container can cause
heavy damage to the calorimeter and the decomposition
vessel. Ignoring can lead to health impairment and injury.
ATTENTION!
Detaching the ignition wire on the ignition electrode (item 20):
• Fix the ignition electrode (item 20) in place at the spanner surfaces using
the AF 5.5 double open-ended spanner supplied.
• This will prevent the ignition electrode from being twisted.
• Loosen the nut (item 30) using the AF5 .5 double open-ended spanner.
Detaching the ignition wire on the crucible holder (item 25):
• Firmly hold the crucible holder and deflector and unscrew the
hexagonal nut using the AF 5,5 double open-ended wrench.
Note: The crucible holder should not be twisted while doing so.
Insert / Tightening of the ignition wire:
The ignition wire is shaped in such a way that the electrodes of the
decomposition vessel fit into the side holes.
The following points have to be strictly observed:
• The ignition wire has already been shaped in such a way that
that it lies above the crucible holder (note curvature).
• Align the ignition wire horizontally between the electrodes.
• Do not press the electrodes together. The deflector of the
crucible holder may be come into contact with the ignition
electrode.
• The ignition electrode must not be twisted and thereby
loosened.
• Follow the sequence in reverse to tighten the nut.
• Ensure that there is a sound contact with the ignition wire.
Note: Beware the danger of burn-off in the case of incorrectly laid ignition wires!
30
24
Spanner
surfaces
28
Electrode with
27 Deflector
ignition wire 30
41
31
31
Crucible holder
C 5010 C 5012
Pos. 24 Electrical ignition wire Pos. 9 Electrical ignition wire
Pos. 27 Deflector Pos. 13 Shaft
Pos. 28 Shaft Pos. 14 Deflector
Pos. 30 Hexagonal nut M4 A2 Pos. 17 Ignition wire
Pos. 31 Hexagonal nut M3 Hastelloy Pos. 80 Hexagonal nut M3
Pos. 41 Ignition wire Hastelloy
The use of alternative materials can pose a risk to life
and limb in the case of the Hastelloy nuts (Pos. 30).
ATTENTION!
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