Calibration Procedure

Teledyne API Model M201E NH3 Analyzer Operator Manual

2.3SPANNING THE ANALYZER WITH AMMONIA GAS

The most important criterion an individual can avail themselves of when spanning an analyzer with ammonia gas is “patience”. Ammonia is a very sticky gas and the response of the analyzer/calibration system depends on a number of factors. The following lists some important points the user should be aware of when calibrating:

∙Is this the first time the analyzer/calibration system has seen ammonia gas in the last couple of days? If so, spanning to a fixed value will take considerably longer than normal: possibly 12 hours to completely stabilize.

∙Is the tubing that is delivering span gas from the calibration bottles, made of stainless steel? Is the tubing from the rear of the calibrator to the analyzer, made of stainless steel? Where possible use stainless steel tubing.

∙Note: The operator is responsible for delivering a set amount of ammonia to the analyzer, calculating the converter efficiency of the M501 NH3, and entering the efficiency value through the user interface, if required.

∙Is the environment where the analyzer resides undergoing large temperature swings (+/- 5 C about the norm Temperature)? If so the sample line can absorb and desorb ammonia at concentration rates that are distinguishable to the analyzer. If possible, heat the sample line to a constant maximum ambient temperature. Otherwise the FILT_SIZE = 42 Samples variable located under the VARS MENU can be lengthened. However, lengthening the filter size slows the rise/fall response time of the analyzer.

∙Does the sampling environment contain large amounts of particulates? If so, it may be necessary to add the sampling filter option. As outlined previously, this will affect the analyzer response.

∙One method to increase the response of both the sampling system and the analyzer is to flow a larger concentration of ammonia gas through the pneumatics for a couple of hours. For example, if the expected range is 500 PPB of ammonia, then flowing 1.0 PPM speeds up the absorption which occurs throughout the pneumatics. The long delays in ammonia response occur when the analyzer hasn’t sampled the gas for some time. Ammonia desorbs from the pneumatics, these surfaces need to be rewetted before span stability is achieved.

∙Prior to conducting the ammonia calibration, confirm that the ammonia converter efficiency is initially set to 1.000 using the following menu key selections:

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05206H DCN5910

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Teledyne M201E manual Spanning the Analyzer with Ammonia GAS
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M201E specifications

The Teledyne M201E is a high-performance, compact oceanographic and environmental monitoring device designed for versatile underwater applications. Leveraging advanced technologies, the M201E presents a plethora of features appealing to researchers, engineers, and environmentalists seeking reliable data collection in challenging aquatic environments.

One of the standout characteristics of the M201E is its robust design, which allows it to operate in various underwater conditions, from shallow coastal regions to deep-sea environments. Built with durable materials, the device ensures long-term performance and resilience against corrosion, making it an ideal choice for long-term deployments.

The M201E is equipped with a range of sophisticated sensors, enabling it to collect comprehensive data on several environmental parameters. Key features include the ability to measure temperature, salinity, depth, and turbidity, among others. This multi-parameter capability allows for detailed assessments of underwater ecosystems and provides essential insights into vital oceanographic processes.

Another remarkable aspect of the M201E is its connectivity and data transmission technologies. It supports various communication protocols, enabling real-time data streaming to research teams, enhancing their ability to respond to changing conditions swiftly. The device can be integrated into larger networks of sensors, facilitating a more extensive monitoring system that collaborates and shares valuable data.

Moreover, the M201E is powered by advanced battery technologies that maximize operational longevity, allowing for extended missions without the need for frequent maintenance. Users can also benefit from intuitive user interfaces and software, streamlining the process of configuring the device, managing data, and analyzing results.

The M201E’s versatility is further demonstrated by its compatibility with various mounting options and its adaptability to different research or monitoring projects. Whether deployed by autonomous underwater vehicles (AUVs), buoys, or fixed platforms, the M201E meets diverse field requirements.

In conclusion, the Teledyne M201E stands out as a highly functional and reliable tool for underwater research. With its robust design, comprehensive sensing capabilities, advanced communications technologies, and ease of integration, it significantly contributes to our understanding of marine and freshwater environments. As the demand for precise and reliable environmental monitoring continues to grow, the M201E is poised to play a crucial role in the future of oceanographic research and environmental management.
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