| Services Available | |
|---|---|
| Free Support | Yes |
概览
KH20 是一款高度灵敏的湿度测量仪，设计用于测量大气中水汽密度的快速波动，而不是水汽的绝对密度。KH20通常与CSAT3 搭配使用，用于涡度协方差系统。
优势与特点
- Compatible with most Campbell Scientific data loggers
- High frequency response suitable for eddy-covariance applications
- Well-suited for long-term, unattended applications
图像
技术说明
The KH20 is typically used with a CSAT3B Sonic Anemometer in eddy-covariance systems for measuring water vapor flux. This highly sensitive hygrometer measures rapid fluctuations in atmospheric water vapor. It does not measure absolute concentrations. The KH20 is compatible with most of our data loggers.
Routine maintenance is required to keep source windows free of scale. You can use the water vapor absorption coefficient for scaled window from the data report if the window will be allowed to scale during measurements.
产品规格
| Range | 1.7 to 19.5 g/m3 (nominal) |
| Type | Ultraviolet krypton hygrometer |
| Input Voltage Range | 10 V to 16 Vdc |
| Current Consumption | 20 mA max (at 12 Vdc) |
| Power Consumption | 0.24 W |
| Output Signal Range | 0 to 5 Vdc |
| Cable Length | 7.62 m (25 ft) |
| Mounting Pipe Length | 50 cm (20 in.) |
| Dimensions |
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| Weight | 6.8 kg (15 lb) |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | The CR10 requires a VDIV2:1 voltage divider. | |
| CR10X (retired) | The CR10X requires a VDIV2:1 voltage divider. | |
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) |
Additional Compatibility Information
Data Logger Considerations
The KH20 requires one single-ended analog input (signal is 0 to 5 Vdc), 12 V power, and ground.
相关技术文档
常见问题解答
KH20: 4
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The sensors used in the eddy-covariance flux application, including the KH20, are not supported by SCWin.
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For a description, refer to the “Basic Measurement Theory” section in Appendix A of the KH20 Krypton Hygrometer Instruction Manual.
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The seal around the source/detector tubes is not user serviceable. If the seal has failed, return the KH20 to the factory for repair. Follow the steps listed on our Repair and Calibration page to request a return material authorization (RMA) number.
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An open-path eddy-covariance program is available for purchase as pn 18442, CRBasic Basic Eddy Covariance Program. This is the program without energy balance sensors. Also available is pn 18443, CRBasic Extended Eddy Covariance Program, with energy balance sensors. To order a custom configured program, contact the Micrometeorology Flux group for assistance.
案例研究
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