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Emerson Process Management GmbH & Co. OHG3-4
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
04/2010
Fig. 3-3: Photometer Assembly Principle
3.1.3 Technical Implementation
3.1 Infrared (IR) and Ultraviolet (UV) Measurement
1 UV source
2 Adaptor cell
3 Analysis cell (internal view)
4 Filter cell
5 UV detector
6 Gas detector
7 IR detector electronics
8 Pyro detector (alternatively)
9 Temperature sensor
10 Filter for pyro detector assembly
11 Chopper
12 Chopper electronics
13 IR source
1
2
3
4
5
6
7
8
9
11 10
13
12
The radiation emitted by an IR or UV source
passes an adaptor cell, widening the beam to
completely ll out the analysis cell´s diameter.
At the opposite side of the cell, another adap-
tor cell is installed to reduce the beam to the
diameter of the opening in the chopper.
The detectors are installed at the rear side
of the chopper.
As pyrodetectors are not as
frequency selective as gas detectors, an ad-
ditional lter has to be installed when using
pyrodetectors, limiting the bandwidth of radi-
ation passing the chopper.