5200 Multi Purpose and 5200 Multi Purpose HF Gas Analysers
05230001A / Revision 988
A7.3 Using the Multi Purpose with the sample conditioning panel
A7.4 Calibrating
You must calibrate the Multi Purpose with the sample conditioning panel as described
in Section 6.1, but you must connect the calibration gas supply to the sample gas inlet
on the sample conditioning panel (Figure A3, item 7).
A7.5 Sampling gases
To obtain the best results from flue gas sampling, we recommend that you locate the
end of the sample pipe/probe as close as possible to the centre of the flue duct. If the
end of the sample pipe/probe is too close to the wall of the flue duct, the gases
sampled may not be representative of the boiler combustion products because of the
stratification of the gases, or because of leaks in the duct.
Refer to Figure A3. When you want to sample gases:
1. Ensure that the inlet pipe (4) from the sample conditioning panel is connected to
the sample gas inlet on the front of the Multi Purpose (Figure 1, item 8).
2. Take sample readings as described in Section 6.2, but note that:
• You must connect a gas sample pipe/probe to the sample gas inlet (7) on the
sample conditioning panel.
• Route the end of the sample pipe/probe to a suitable sample point (see
above).
• Allow sufficient time for the sample measurement to stabilise (see
Section A7.2).
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If the sample gases are very dirty (that is, contain soot or particulates), we
recommend that you use the catchpot as a bubbler when you carry out
sample measurements; that is: remove the top of the catchpot and fill the
catchpot with clean water to a level just above the bottom of the gas inlet
pipe in the catchpot.
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If you are sampling flue gases, ensure that you position the end of the
sample pipe/probe at a location in the flue where the gases are
representative of the boiler combustion products.
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