Nitrogen analysis with the CLD 5000
multi EA 5000
44
Figure 21Basic module with detection module and sampling module
The detection module consists of the following components:
Component
Function
Micro-plasma chamber
Preparation of ozone (O
3
) from oxygen
Converter
Transformation of nitrogen dioxide
(NO
2
) into nitrogen monoxide (NO)
Reactor with sensor
Reaction of nitrogen monoxide (NO)
with ozone (O
3
) to produce nitrogen
dioxide (NO
2
*)
Detection of the amount of emitted light
Chemical and thermal ozone decom-
poser
Decomposition of excess ozone (O
3
)
Diaphragm pump
Conveyance of the measuring gas
through the detector
Differential pressure sensor
Regulation of the pressure compensa-
tion between the variable measuring gas
flow and the fixed suction flow of the
membrane pump.
Absorber
Cleaning of the aspirated air before en-
tering the diaphragm pump
7.1.3
Connection
The equipment door at the front is closed tightly and cannot be opened. An LED is in-
stalled on the door. The LED flashes during the run-in period of the detection module
and lights up permanently when the module is operational.
The following connections can be found on the rear of the detection module:
¡
Main switch, power connection, device fuses
¡
Media connections for gases and waste
