Section 2
Model 601/601P/602/602P/603 NDIR Analyzer
California Analytical Model 600_NDIR_Series_v10.0 CE
Operators Manual
Page 19 of 86
V
Zero gas
Span gas
t
Figure 2-2 Detector Output Signal
Output
Vo
Vs
Vs
Vo
Zero gas
Span gas
= K (Constant)
0
Concentration
Figure 2-3 Absorption Characteristic of
Detector
2.5. Interference
Gases
Whenever a sample gas contains a gas component that has an absorption spectrum that
overlaps the spectrum of the gas to be measured, that gas is commonly referred to as an
interference gas. The Microflow Detector was specifically designed to minimize the effect of
interference gases. When these gases are present, the pressure rises in the front and rear
chamber of the detector cancel each other minimizing any response to the interference gases.
Summary of Contents for 600-NDIR
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