E Instruments E4500, Operating & Maintenance Manual

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K000000000EJ 023826A0 100714
14.8 CO
2
sensor for Carbon Dioxide measurement in combustion processes
Carbon Dioxide (CO
2
) is the result of combustion of an organic compound in presence of a quantity of oxygen
sufficient to complete its oxidation. In nature, it is also produced by aerobic bacteria during the process of alco-
holic fermentation and is the by product of respiration.
Many combustion processes are defined with 'mixed fuel' and is therefore difficult to calculate the amount of CO
2
produced. To avoid this drawback, the only way to know the amount of CO
2
produced in a combustion process
with 'mixed fuel' is to measure the CO
2
with special NDIR sensors.
14.9 Installing the CO
2
sensor
When the CO
2
(position S3/S4) is mounted in the E4500, it is mandatory to configure the autozero by setting it at
60 seconds, in order to allow for a proper pre-heating of the sensor itself.
Configuration→Analysis→Autozero (SEE SECTION 9.2.6) →
OK
Purging
s
0
Autozero
s
50
Configuration
Autozero
07/08/14
10:00
O
Purging
s
0
Autozero
s
05 0
Configuration
Autozero
07/08/14
10:00
OK
O
Purging
s
0
Autozero
s
06 0
Configuration
Autozero
07/08/14
10:00
OK
O
Purging
s
0
Autozero
s
60
Configuration
Autozero
07/08/14
10:00
O