Co Measurement; O2 Check - Ecom EN3 Instruction Manual

4.2 CO measurement

The gas channel check, called also CO measurement, is used for the tech-
nical check of gas-fired plants in regards of safety aspects. Hereby the CO
concentration in the gas channel is measured after the flow safety device
and calculated on an undiluted value (oxygen rest content in flue gas = 0%).
As the gas conditions after the flow safety device are no more homogeneous
because of the flow in of secondary air and consequently the core stream
measurement can be erratic, the analysis of the exhaust gas is performed
along the totality of the exhaust pipe diameter. A multi-hole probe (optional
accessory) is hereby used as sampling probe.
The calculated value shown on the line „CO 0 %" corresponds to the meas-
ured CO concentration supposed the oxygen content would amount 0% by
the same exhaust gas volume. It is consequently the undiluted CO content
in exhaust gas. If the values indication is stable, press <Save> to store the
result in the intermediate memory. If a printout of the values should occur
simultaneously to the recording in the intermediate memory press <F2> (the
complete content of the intermediate memory will be printed out).
17.5
O2
738
CO 0%
123
CO
7.00
Exc. air
CO measurement
Measurement stored in
intermediate memory

4.3 O2 Check

This measurement is performed by room-independent plants like gross cal-
orific value plants. It is determined if exhaust gas flows into the combustion
air (O2 content drops down / CO content can be present) and herewith influ-
ence on the combustion quality. For this analysis, a special multi-hole probe
(optional accessory) should be used.
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%
ppm
ppm
ecom-EN3