Page 20
ecom-EN2
8.3. O
2
check
This measurement is performed by room-independent plants like
gross calorific value plants. It is determined if exhaust gas flows into
the combustion air (O
2
content drops down / CO content can be pre-
sent) and herewith influence on the combustion quality.
For this analysis, a special multi-hole
probe (optional accessory) should be
used. If the value indicated is stable,
press <Record> to store the value 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).
8.4. Draught Measurement
A trend indication for the draught conditions in the exhaust channel
can already be viewed during the gas analysis. Nevertheless the
value for the chimney draught will not be stored together with the gas
values while pressing <Record> because the differential pressure
sensor tends to drifts because of its sensibility.
For an exact measurement, it is consequently advised to re-calibrate
this sensor just before sampling and documenting the value.
The display shows the current value as
well as the recommendation to re-set
the zero point of the sensor. Disconnect
the draught hose from the instrument for
a short moment and press <F4>. The
sensor is herewith re-calibrated.
O2 value in air
O2
19.5
%
CO
3
ppm
Draught
0.01
hPa
O2 val. in air
Measurement stored in
intermediate memory
Pressure
Draught
-0.12
hPa
Recorded value:
--.-- hPa