Teledyne API Model 201A NH3 Analyzer Instruction Manual, 04689, Rev. B1

converts some of the ammonia to NO, thus the TN channel data contains a small ammonia signal. Secondly, the ammonia converter does not convert all of the ammonia or ambient NO2 to NO. Finally, the high temperature in the ammonia converter causes the oxygen and nitrogen in ambient air to react, creating a background of NOx which needs to be factored into computing the result. Fortunately, all of the above shortcomings have been overcome in the M201A by careful calibration, and calculation of the result. .

Periodically, the AutoZero valve switches allowing the analyzer to read zero background. The AutoZero readings are subtracted from all of the other readings. This improves zero baseline stability.

As with many chemical reactions the conversion of ammonia in the presence of other oxides of nitrogen is complicated.

In the molybdenum converter operating at 315oC, the following significant reactions are taking place:

Mo + NO2 → MoO3 + NO ~100% Eff

NH3 + Mo + O2 → MoO3 + NO <10% Eff

Notice in the second reaction some of the ammonia is converted to NO by the molybdenum metal.

The M501NH NH3 Converter operates at 825oC. At this high temperature, several reactions occur:

NO → NO

Efficiency = ~100 %

NOx → NO

Efficiency = ~85%

NH3 → NO

Efficiency = ~85%

N2 + O2 → NO

Efficiency = <1%

As can be seen from the above reactions, the calculation of the ammonia concentration and overall calibration of the instrument must be done carefully if accurate ammonia concentrations are to be measured. The calibration procedure is covered in Section 2.

1.1.1 Special Considerations for Ammonia Measurement

Ammonia is a difficult gas to measure due to its chemical characteristics. Because of its large dipole moment, the gas tends to adsorb on surfaces and diffuse into many materials. The following precautions should be observed when designing an ammonia sampling system and connecting the M201A analyzer to the system:

Materials:

Do NOT use TEFLON tubing or fittings in contact with NH3 sample or span gas.

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Teledyne 201A manual Special Considerations for Ammonia Measurement, No → no
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201A specifications

The Teledyne 201A is a high-performance, compact data acquisition system that integrates advanced features and reliable technologies, making it a valuable tool for various applications in engineering, research, and industrial monitoring. This instrument is designed to deliver accurate measurements while being user-friendly and versatile.

One of the standout features of the Teledyne 201A is its modular architecture. This allows users to customize the system according to their specific needs by selecting from a range of different modules, including analog input, digital input/output, and communication interfaces. This flexibility enables users to adapt the 201A for various tasks, from simple data logging to complex multi-channel analysis.

The Teledyne 201A offers robust data acquisition capabilities with high-resolution analog-to-digital converters. This feature ensures that the system can capture even the slightest variations in data with precision, which is essential in applications such as scientific research and quality control in manufacturing processes. Additionally, it operates with a wide variety of input signal ranges, accommodating different types of sensors and devices seamlessly.

Advanced signal processing technologies are another hallmark of the Teledyne 201A. Users benefit from built-in filtering and signal conditioning, which enhances the quality of the data being collected. This is crucial for eliminating noise and improving the signal-to-noise ratio, thus ensuring that the collected data reflects true system performance.

The system's user interface is intuitive, featuring a clear display and straightforward controls, making it accessible for users at varying levels of expertise. Furthermore, it includes software that enables easy configuration and data visualization. This software provides powerful tools for real-time monitoring, analysis, and reporting, making it easier for users to interpret data and derive actionable insights.

The Teledyne 201A is designed with portability in mind. Its compact size and lightweight construction make it suitable for field deployments, allowing users to conduct measurements and monitoring in diverse environments. Whether in a laboratory, industrial setting, or outdoor location, the 201A adapts well without compromising performance.

In terms of connectivity, the Teledyne 201A supports various communication protocols, including USB, Ethernet, and serial interfaces. This ensures easy integration with existing systems and facilitates data transfer to computers or cloud-based platforms for further analysis.

In conclusion, the Teledyne 201A data acquisition system stands out due to its modular design, high-resolution data capabilities, advanced signal processing, user-friendly interface, portability, and versatile connectivity options. These features come together to make the 201A a powerful and adaptable tool for a wide range of data acquisition applications.
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