Draught Measurement; Option Flow Measurement - Ecom EN3 Instruction Manual

O2 value in air
19.5
O2
CO
0.01
Draught
O2 value in air
Measurement stored in
intermediate memory

4.4 Draught measurement

A trend indication for the draught conditions in the exhaust channel can al-
ready be viewed during the gas analysis. Nevertheless the value for the
chimney draught will not be stored together with the gas values while press-
ing <Save> 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.
Pressure
-0.12
Draught
Recorded value:
-0.12 hPa
The display shows the exact measurement value which can be stored while
pressing <Save> and added to those results previous stored in the interme-
diate memory. The stored value is shown on the display. Press <ESC> to
exit the draught measurement menu.

4.5 Option Flow measurement

This measurement can be done with a Pitot tube. At first the pitot factor of
the pitot tube must be entered („Adjustments" / „Internal" / „Pitot factor"). After
connecting the Pitot tube to the instrument, the zero point of the sensor can
be set with <F4>. With <F1> the cross section of the flow channel can be
entered (needed for calculation of the flow rate).
ecom-EN3
If the value indicated is stable, press <Save>
to store the value in the intermediate memory.
If a printout of the values should occur simulta-
%
3
neously to the recording in the intermediate
ppm
memory, press <F2> (the complete content of
hPa
the intermediate memory will be printed out).
The display shows the current value as well as
the recommendation to re-set the zero point of
hPa
the sensor. Disconnect the draught hose from
the instrument for a short moment and press
<F4>. The sensor is herewith re-calibrated. Re-
connect the draught tubing.
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