SDE_U14 Chapter 1: Description of functions 1-3
Physical principles, Fortsetzung
˝
Basic design
• The Uras 14 analyzer module is a twin-beam NDIR process photometer with no
dispersive elements.
The module consists of a completely self-contained optical unit with the
following elements:
• Infrared source (emitter)
• Aperture wheel (chopper)
• Emitter aperture
• Sample cell with measurement and reference chambers
• Infrared detector with diaphragm capacitor (receiver)
Figure 1-1
Measurement
principle
CO
N
2
A
D
µP
RS232 Int.Bus
A
D
CO
Sensor-CPU
IR-Elektronic
Uras14_1
1 Emitter
2 Emitter aperture
3 Aperture wheel
4 Sample cell
5 Measurement chamber
6 Reference chamber
7 Infrared detector
8 Diaphragm capacitor
Fortsetzung auf der folgenden Seite
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