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CMP6为ISO一级短波辐射表,用于监测全太阳波段的太阳辐射。可直接接入到Campbell Scientific数据采集器,通常用于环境监测、太阳能资源评估及太阳能电厂性能应用中。
CMP6以保护在两层玻璃穹顶罩中的高质量黑化热电堆来测量太阳辐射。它在285至2800 nm波段内具有平直的光谱灵敏度,因而非常适合自然太阳光测量的应用中,以及冠层下、温室中或建筑的太阳辐射监测,还可倒置安装用于监测反射短波辐射。
一支干燥剂筒用于防止CMP6的穹顶内侧结露。Campbell Scientific还提供CVF3加热通风罩,可防止辐射表穹顶表面结冰或结露。
CMP6含有一个直接固定的白色防辐射盖子,用于减小太阳辐射增温。自带的水平泡和可调水平螺丝,使得传感器并不需要额外的调平底座。
CMP6产生微伏级信号,可由Campbell Scientific数据采集器直接测量。
Sensor | High-quality blackened thermopile protected by two glass domes |
Measurement Description | Monitors solar radiation for the full solar spectrum range |
ISO Classification | Class B (first class) |
Spectral Range | 285 to 2800 nm |
Sensitivity | 5 to 20 μV W-1 m2 |
Temperature Dependence of Sensitivity | < 4% (-10° to +40°C) |
Response Time | < 18 s (95% of final value) |
Zero Offset Due to Thermal Radiation | < 15 W/m2 (200 W/m2) |
Non-Stability | < 1% (change/year) |
Non-Linearity | < 1% (0 to 1000 W/m2) |
Directional Error | < 20 W/m2 (up to 80° with 1000 W/m2 beam) |
Tilt Error | < 1% |
Level Accuracy | 0.1° |
Impedance | 20 to 200 Ω |
Operating Temperature Range | -40° to +80°C |
Typical Signal Output | 0 to 20 mV (for atmospheric applications) |
Maximum Irradiance | 2000 W/m2 |
Expected Daily Uncertainty | < 5% |
Dome Diameter | 5 cm (2 in.) |
Width | 15 cm (5.9 in.) with shield |
Height | 9.25 cm (3.64 in.) |
Weight | 0.9 kg (2 lb) with 10.1 m (33 ft) cable |
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Product | Compatible | Note |
---|---|---|
CR1000X (retired) | ||
CR300 (retired) | ||
CR3000 (retired) | ||
CR310 | ||
CR350 | ||
CR6 | ||
CR800 (retired) | ||
CR850 (retired) |
The CMP6 has a bubble level and two leveling feet, which allow it to be leveled without using a leveling base. This pyranometer mounts to a mast, crossarm, or pole (1.0 in. to 2.1 in. OD) via the CM255 or CM255LS mounting stand. The CMP6 should be mounted away from all obstructions and reflective surfaces that might adversely effect the measurement.
CMP6-L: 9
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The ISO and WMO classify First Class pyranometers, such as the CMP6-L, as suitable for network operations. However, if accuracy is of paramount concern, consider using Class A pyranometers, such as the CMP11-L and CMP21-L, instead.
A cable length of 300 ft can be used with the understanding that additional noise may be introduced into the measurement. Typically, in systems with pyranometers, the sensors are installed near the data logger (within 50 ft). If an application requires long leads, contact Campbell Scientific for assistance.
No. These are all passive devices that create their own voltage signal as a response to the measurement being made. There is, however, a heater and ventilator for these sensors (CVF4-L) that requires a power supply.
All of these pyranometers measure the amount of solar short-wave radiation incident on a surface. Because of their accuracy and performance level, the CMP11-L and CMP21-L are classified by the International Organization for Standardization (ISO) and World Meteorological Organization (WMO) as Secondary Standard sensors, representing the highest level of measurements made by pyranometers. In comparison, the CMP6-L is classified as a First Class sensor, which is the middle classification for pyranometers. (Second Class is the lowest pyranometer classification.)
大多数 Campbell Scientific 传感器的型号中都带有 –L,它表示用户指定线缆长度。如果传感器型号名称列有 –LX (这里 “X” 是其它的某个字符), 那么该传感器需要用户指定长度,但线缆尾端会配有用于某个独特系统的特殊快速接头:
如果一个传感器的主型号数字的后面没有被指定 –L 或其它的 –LX 字符,那么该传感器将具有固定的线缆长度。在产品页面订购栏中 (Ordering tab) 的描述字段的末尾,会列出线缆的长度。例如 034B-ET 型号的描述字段含有信息:Met One风传感器适用于ET气象站,67英寸线缆 (Met One Wind Set for ET Station, 67 inch Cable)。产品按固定的线缆长度做尾端处理,默认是尾线方式。
如果线缆尾端配有用于某个独特系统的特殊快速接头,则型号尾部的字符会指定该传感器用于哪一个系统。例如,034B-ET 型号表明该传感器是一个 034B 且用于 ET107 系统。
不是每一种传感器都有不同的线缆尾端选项。通过查找传感器产品页面的订购栏 (Ordering tab) 中的两个位置,可以检查某种特定传感器的可用的线缆尾端选项:
如果传感器以 –ET, –ETM, –LC, –LQ, 或 –QD 等版本的型号供应,那么线缆尾端选项已经反映在该传感器的产品型号中。例如,034B 以 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, 和 034B-QD 等型号供应。
所有其它的线缆尾端选项,如果可用,会列在该传感器产品页面的订购栏 (Ordering tab) 中的线缆尾端选项 (“Cable Termination Options) 区域。例如,034B-L 风速风向传感器具有 –CWS, –PT, 和 –PW 等线缆尾端选项,显示在 034B-L 产品页面的 订购栏 (Ordering tab) 位置。
注: 当更新的产品添加到我们的库存中时,一般来说,我们会在单个传感器的产品型号下面列出多种线缆尾端选项,而不是创建多个产品型号。例如,HC2S3-L 具有 –C 线缆尾端选项用于连接到 CS110,而我们并没有使用 HC2S3-LC 产品型号。
Yes. Each pyranometer is shipped with an instruction manual provided by Kipp & Zonen that contains information concerning its construction, spectral sensitivity, cosine response, and a simple sensor check out procedure. Included with the sensor and manual is a calibration certificate with the sensor sensitivity value and serial number.
Because of the loss of IR radiation, nearly all thermopile instruments typically have a negative offset. This offset is most easily visible at night-time, when a small negative value is read instead of zero. This same offset is present during the daytime, but it is not as visible because of the large solar signal.
Another common issue involves leveling an instrument. Leveling a thermopile instrument can cause errors in the direct beam component because the cosine response is not correct. These errors are more notable when the sun is close to the horizon because the angle is so shallow.
Campbell Scientific 的很多传感器都有可行的不同线缆尾端处理选项,包括以下几种:
注: 线缆尾端选项的可行性因传感器而异。例如,传感器可能会有 无选项、两个选项或几个选项可供选择。如果预期的选项没有列在所指定的传感器中,请联系 Campbell Scientific 的应用工程师寻求帮助。