Portable Emissions Monitor
Operational Theory
Teledyne
Analytical
Instruments
5
Operational Theory
2.1 Introduction
The PEM-9004 uses state-of-the-art sensor technology for accurate
measurements of O
2
, CO/H
2
, CO-high and optionally, NO and SO
2
. The
sensors employed are electrochemical cells specific for each component.
The instrument will measure and display the actual gas
concentration for O
2
and CO(H
2
). Depending on the options selected at
the time of purchase, the PEM-9004 can also measure and display the
NO, CO (high), and SO
2
concentration of a flue gas. The analyzer, based
on measurements of draft pressure, temperature, and data entered for the
combustion fuel plus pertinent thermodynamic data internally stored as
part of the instrument’s database, will calculate and display the
following combustion related information:
•
CO
2
concentration
•
Non-diluted CO concentration
•
Pressure and temperature differential
•
Efficiency (Eta)
•
Waste gas losses (qA)
•
NOx concentration
•
Dew point
•
Eta combustion value
2.2 Sensor Cell
At the heart of the analyzer are the sensors. Up to 5 sensor cells are
installed depending on the options selected at the time of purchase. Each cell
is specific to a particular gaseous component.