Trace Oxygen Analyzer | Operational Theory | |
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Figure 2-2: Flow Diagram with Options
2.4 Zirconium Oxide Sensor Application Notes
The following sample gases require conditioning prior to entering the sensors:
∙Flammable gases such as methane, alcohol and carbon monoxide may cause a measurement error. They must be filtered from the sample gas before entering the cell.
∙Gases containing halogen atoms (F, Cl, Br, etc.) such as Freon, must be filtered before entering the cell. The sensor will be damaged by the decomposition of Freon.
∙Gases containing SOx, H2S, silicone vapor and adhesives must not enter the sensor. These components adversely affect the performance of the sensor.
∙Dust and oil should be filtered from the sample gas.
∙Water vapor in contact with the sensor will damage the sensor. Use a moisture trap or filter to remove any water vapor in the sample.
2.5 Electronics and Signal Processing
The Model 3000ZA Trace Oxygen Analyzer uses an 8031 microcontroller with 32 kB of RAM and 128 kB of ROM to control all signal processing, input/output, and display functions for the analyzer.
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Teledyne Analytical Instruments | 9 | |