Flow Measurement (Option) - Ecom j2kn pro Operating Instructions Manual

8.3. O check
2
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
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 the key <Memory> (disk symbol)
to store the value in the intermediate
memory. If a printout of the values
should occur simultaneously to the re-
cording in the intermediate memory,
press <F2> (the complete content of the
intermediate memory will be printed
out).

8.4. Flow measurement (option)

This measurement can be done with a
pitot tube. At first the pitot factor of the
pitot tube must be entered („Adjust-
ments" / „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). After the pitot tube is posi-
tioned in the flow channel, the display
shows the speed (m/s), the flow rate
3
(Nm /h) and the differential pressure
(Pa). 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).
Page 20
content drops down / CO content may be rise)
2
O2 value in air
19.5
O2
CO
0.01
Draught
O2 value in air
recorded!
Measurement stored in
intermediate memory
Connections for
pitot tube
Flow measurement
0.4
V.Gas
M.Flow
0.1
dP
Flow measurem.
recorded!
Measurement stored in
intermediate memory
ecom-J2KN
%
3
ppm
hPa
25.11.07
m/sec
44
Nm3/h
Pa
25.11.07
pro