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概览
TGA200A 痕量气体分析仪使用可调二极管激光吸收光谱技术 (TDLAS) 来测量空气气样中的痕量气体浓度。这种技术具有高灵敏度、快速测量和目标气体可选择性的特点。它的简单设计使得通过选用合适的激光源就能够测量很多种气体中的某一种。TGA200A 是具有 1.5 m 单光程光路的测量系统，使用热电冷却的激光器。
TGA200A 被安放在坚实的环境防护机箱内部，设计可用于苛刻的气候条件下，从高纬度的北方森林、永久冻土带、苔原带，到有大量农业耕作区的中纬度地区，以及赤道附近的热带雨林，TGA200A 都能稳定工作。一般的应用包括：以慢速的梯度系统，或高速的涡度相关通量测量等方式，测量全球所有生态系统中的氧化亚氮、甲烷、二氧化碳中的同位素。
自 1993 年以来，Campbell Scientific 一直在生产 TGA 系列的痕量气体分析仪，TGA200A 汇聚了 20 多年的研发成果。尽管之前数代的 TGA (TGA100, TGA100A, 和 TGA200) 产品都使用相同的核心技术，但TGA200A 的建造是基于这些产品的进一步改进而来。要了解关于TGA200A 的更多信息，请联系 Campbell Scientific, Inc 。
优势与特点
- Small sample cell volume that provides superior frequency response
- Thermoelectrically cooled laser; no cryogenic cooling required
- Laser upgrades available to existing TGA customers; contact Campbell Scientific for more information
- Choice of laser sources to measure CO2 isotopes, N2O, or CH4
- Optically simple measurement system that does not require cleaning of the optical cell in the field
- 500 Hz measurement rate that supports excellent synchronization
- Rugged environmental enclosure that allows the TGA200A to be placed outside on the ground
- Simple Windows user interface for setup, configuration, and real-time monitoring
- Complete greenhouse gas measurement flux solution provided by combining one or more TGA200As with Campbell Scientific’s sonic anemometers, data loggers, gas analyzers, closed-path gas analyzers, or eddy-covariance system
- Advanced sampling systems also available for low-flow applications such as profile, gradient, or user-supplied chamber measurements
产品规格
| Measurement Rate | 500 Hz |
| Sample Cell Volume | 200 mL |
| Dimensions | 211 x 47 x 55 cm (83 x 18.5 x 21.5 in.) |
| Weight |
|
Typical Measurement Noise |
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| -NOTE- |
Preliminary Results Allan deviation with 100 ms averaging time. |
| Nitrous Oxide (N2O) - Laser pn 30478 | 1.5 nmol mol-1 |
| Methane (CH4) - Laser pn 30477 | 7.0 nmol mol-1 |
| Nitrous Oxide (N2O) - Laser pn 31121 | 1.8 nmol mol-1 |
| Carbon Dioxide (CO2) - Laser pn 31121 | 0.3 μmol mol-1 (based on the 13C16O16O isotopolog) |
| Carbon Dioxide (CO2) - Laser pn 31119 | 0.15 μmol mol-1 |
| δ13C - Laser pn 31119 | 0.5 ‰ |
| Carbon Dioxide (CO2) - Laser pn 30877 | 0.5 μmol mol-1 |
| δ13C - Laser pn 30877 | 2.0 ‰ |
| δ18O - Laser pn 30877 | 2.0 ‰ |
Power Requirements |
|
| Analyzer (TE-cooled laser) | 90 to 264 Vac, 47 to 63 Hz, 34 W (max) 22 W (typical) |
| Heater | 90 to 264 Vac, 47 to 63 Hz, 150 W (max) 50 W (typical) |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Additional Compatibility Information
数据采集器考虑
使用Campbell Scientific 的数据采集器来收集来自 TGA200A 的数据。TGA200A 兼容 SDM 通讯协议，通过它连接到数据采集器。在很多案例中，在订购TGA200A时，也通常同时订购含数据采集器的采集系统。要了解关于数据采集系统及与用户提供的组件 (例如叶室) 的兼容性方面的更多信息，请联系 Campbell Scientific。
兼容的当前的数据采集器
| CR1000 | CR3000 | CR6 |
 |
|
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兼容的已停产的数据采集器
| CR5000 |
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下载
TGA200A Firmware v.1.1 (1.1 MB) 02-12-2015
The TGA200A firmware is used to support the TGA200A or prior TGA models that have been upgraded to use a thermoelectrically cooled (TEC) laser.
The TGA firmware includes the OS that must be uploaded to the analyzer's CPU board before operating a TEC laser.
Warning: Download of TGA200A Firmware should only be done for use with TGA models running TEC lasers!
TGA TEC v.1.1 (10.6 MB) 02-12-2015
The TGA TEC Support Software is used to support the TGA200A or prior TGA models that have been upgraded to use a thermoelectrically cooled (TEC) laser.
TGA TEC is a user-interface software package that allows users to connect to the analyzer, set settings, and monitor real-time analyzer performance.
Compatibility:
TGA TEC 1.1 is compatible with the Windows 7 operating system or newer.
Warning: Download of TGA TEC v1.1 should only be done for use with TGA models running TEC lasers!