Teledyne API Model 200AU NOX Analyzer Instruction Manual, 02293, Rev. F

7.7.2 Span Calibration with AutoRange or Independent Range

Observe the following guidelines when calibrating in AutoRange or Independent Range.

1.When doing a span calibration of the M200AU use 80% of the highest of the ranges. This will result in the most accurate calibration.

2.When selecting concentrations for the NO/NOx or NO2 (GPT) dynamic calibrations use 80% of the highest AutoRange or the highest Independent Range. This will produce the most accurate calibration.

3.If the calibration data is obtained from the RS-232 port or from the front panel display, no special changes are necessary if the instrument is in AutoRange or Indep. Range. This is because the internal hardware and software has sufficient dynamic range to cover the entire EPA equivalent range, also those features only affect the analog outputs.

4.If using the analog outputs and a chart recorder or datalogger, be sure to note when AutoRange occurs so that the correct concentration values are used. With Independent Ranges, change the ranges so that all ranges are equal to the highest range so that all calibration data is on scale.

5.Calibration curves or relationships should be obtained for each range used.

7.8Calibration Quality

After calibration is complete, it is very important to check the QUALITY of the calibration. The calibration of the M200AU involves balancing several sections of electronics and software to achieve an optimum balance of accuracy, noise, linearity and dynamic range.

The following procedure checks the Slope and Offset parameters in the equations used to compute the NO, and NOx concentrations. It is important that they fall within certain limits with respect to themselves and to each other. For an explanation of the use of these terms in the concentration calculation see Section 5.2.2.5.

The slope and offset parameters are similar to the span and zero pots on an analog instrument. Just as in the analog instrument, if the slope or offset get outside of a certain range, the instrument will not perform as well.

The slope value will be slightly different on the NO and NOx channels. This is due to slight differences in pneumatic resistance in each pathway. If the slopes are significantly different, there is a calibration error or a cross port leak in the switching valve. If there is a sudden large change in slopes after a calibration, that usually indicates a change in reaction cell pressure. This generally requires a Factory Calibration covered in Section 9.1.6.

7-33

Page 114 Page 116
Page 115
Image 115
Teledyne 200AU instruction manual Calibration Quality, Span Calibration with AutoRange or Independent Range
Page 114 Page 116

200AU specifications

The Teledyne 200AU is a cutting-edge analytical instrument designed primarily for trace and ultra-trace analysis of elements in various liquid samples. Renowned for its reliability and precision, this inductively coupled plasma mass spectrometer (ICP-MS) is widely utilized in environmental monitoring, food safety, clinical diagnostics, and geochemical research.

One of the distinguishing features of the Teledyne 200AU is its exceptional sensitivity, allowing for the detection of elements at concentrations as low as parts per trillion (ppt). This sensitivity is crucial for applications where even minute traces of contaminants can have significant implications. The instrument also boasts a wide dynamic range, accommodating high-concentration samples without compromising accuracy.

The Teledyne 200AU incorporates advanced technologies that enhance its analytical capabilities. At the core of its design is a robust ICP source, which ensures optimal ionization efficiency. The instrument also features a high-resolution quadrupole mass analyzer, which enables precise separation and identification of ions based on their mass-to-charge ratio. This feature is essential for distinguishing between isotopes and analyzing complex mixtures.

Another notable characteristic of the Teledyne 200AU is its user-friendly interface, which simplifies the operation and data management processes. The software is intuitive, offering sophisticated data processing algorithms that streamline analysis. Users can easily access real-time data visualization, facilitating timely decision-making based on analytical results.

The instrument is built with durability in mind, featuring a compact design that allows for easy integration into various laboratory environments. The Teledyne 200AU is also equipped with state-of-the-art safety features, including enhanced cooling systems and automated shutdown protocols to protect both the instrument and the user.

Moreover, the Teledyne 200AU supports a variety of sample introduction methods, including nebulization and laser ablation, providing flexibility to accommodate different types of samples and experimental needs. Its multi-element capability further enhances its versatility, allowing simultaneous detection of multiple elements in a single analysis.

In summary, the Teledyne 200AU stands out as a premier instrument in the field of mass spectrometry. Its combination of high sensitivity, advanced technology, user-friendly features, and robust design makes it an invaluable tool for scientists and researchers seeking precise elemental analysis across various disciplines.
Top Page Image Contents