CS320是一种数字热电器金字计计,可测量广谱短波辐射,并通过简单的SDI-12协议通信到数据记录器。该传感器设计消除了可能不利影响数据质量的测量误差和编程错误。
This pyranometer has been designed to improve the global solar radiation measurement significantly (even under cloudy conditions) without adding substantial cost. The CS320 is suitable for applications ranging from environmental research to agriculture to large mesoscale weather networks (mesonets).
The CS320 is manufactured using a high-grade anodized aluminum body and IP68-rated 316 stainless-steel M8 connector (marine grade). The CS320 sensor is heated (on/off switchable under user control) and allows continuous operation in changing environmental conditions. The pyranometer's calibration data is stored on the sensor.
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CS320将黑体热探测器与丙烯酸扩散器结合在一起。与硅光电池金字计计的光谱响应相比,这种设计是一个显着的改进,同时提供了可比的价格。热电器金字计计使用一系列热电连接(遵循热电偶原理的两种不同金属的多个连接连接),提供了几个信号,该信号为几个µV/w/m2proportional to the temperature difference between a black absorbing surface and a reference. The thermopile pyranometer’s black surface uniformly absorbs solar radiation across the solar spectrum.
0.2 W加热器keeps water (liquid and frozen) off the sensor to minimize errors caused by dew, frost, rain, and snow blocking the radiation path. Dew and rain runoff is faciliated by the dome-shaped sensor head (diffuser and body). This keeps the sensor clean and minimizes errors caused by dust blocking the radiation path. The sensor is housed in a rugged anodize aluminum body, and the electronics are fully potted.
The CS320 pyranometer has sensor-specific calibration coefficients determined during the custom calibration process. Coefficients are programmed into the microcontrollers at the factory. The CS320 has an SDI-12 output (SDI-12 version 1.4), where short-wave radiation (W/m2)以数字格式返回。CS320载液计的测量需要具有包括M或C命令的SDI-12功能的测量设备。
| Sensor | 热电检测器,丙烯酸扩散器,加热器和信号处理电路安装在铝制外壳中 |
| Measurement Description | 量度广谱短波辐射 |
| ISO分类 | C类(第二类) |
| 校准不确定性 | ±2.6% |
| 测量范围 | 0 to 2000 W/m2(净短波辐照) |
| 测量可重复性 | <1% |
| 长期漂移 | <2%(每年) |
| 非线性 | <1% |
| 灵敏度 | 0.057 mv/w/m2 |
| 检测器类型 | 黑体热门 |
| SDI-12 Response Time | 2 s |
| 视野(FOV) | 180° |
| 光谱范围 | 385 to 2105 nm (50% points) |
| 定向(余弦)响应 | <±20 w/m2(在80°太阳能顶峰) |
| 温度响应 | <5%(从-15°到 +45°C) |
| 输出 | SDI-12(版本1.4)1200 bps |
| 零偏移a | 8 W/m2 |
| 零偏移b | < 5 W/m2 |
| 工作温度范围 | -50°至 +60°C |
| 操作环境 | 0至100%相对湿度 |
| 加热器 | 0.2 W (on-board) |
| 加热器Power Requirements | 25 mA电流排水(在12 VDC时) |
| Input Voltage Requirements | 6至24 VDC |
| 当前排水 |
|
| 每日总数的不确定性 | < 5% |
| 由于云引起的错误 | ±2 % |
| Mechanical Rating | IP66/68 |
| 工厂校准 | 可追溯到二级标准黑体热层载膜计,可追溯到瑞士达沃斯的世界辐射参考。 |
| 遵守with Standards |
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| 保修单 | 4 years against defects in materials and workmanship |
| 直径 | 3.43厘米(1.35英寸) |
| 高度 | 3.96厘米(1.56英寸) |
| 重量 | 〜65 g(2.3盎司) 可能因盆栽而有所不同。 |
使用M4的两个示例程序!命令返回太阳辐射(w/m^2),原始毫伏值(MV),传感器温度(°C)以及X,Y和Z轴值(°)。该程序还计算每日总助焊剂(MJ)。一个示例程序还根据空气温度测量,露点计算和电池电压测量来控制加热器。Hygrovue™10气温和相对湿度探针提供了露点计算中使用的测量值。
与CS320:9
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The leveling base provides physical stability and helps ensure the sensor is leveled correctly. It is not recommended to use the sensor without the base. The sensor mounts to the base with an included bolt. However, a user-supplied plate with a hole drilled in it could be used instead to accept the sensor’s mounting bolt.
笔记:无论使用什么安装方法,都必须将传感器升级才能正确操作。
SDI-12总线能够至少有10个传感器连接到它,每个传感器都有200英尺的电缆。传感器较少,可能会有更长的电缆长度。
将传感器与最近校准的CS320在晴朗的阳光下与太阳在头顶上进行比较。确保将传感器用作参考也是水平。
为了最大程度的准确性,坎贝尔科学通常建议每两年重新校准所有传感器。根据应用程序的要求,可能需要在重新校准周期之间等待更长的时间。要确定金直线计是否需要重新校准,请访问Clear Sky Calculator web page。
有关其他信息,请阅读“如何检查太阳辐射测量的准确性”博客文章。
尽可能购买带有所需电缆长度的传感器。一些传感器具有用户指定的电缆长度,而其他传感器具有设置的电缆长度。
有时,旧电缆可以用新的,更长的电缆代替。
通常,其他电缆不能插入现有电缆上,因为:
拼接电缆共同增加了水可能进入电缆并引起短路,腐蚀和其他一些潜在问题的可能性,从而导致测量问题。
Because of the potential issues, do not splice any sensor cable without first contacting Campbell Scientific to discuss the sensor in detail.
并非每个传感器都有不同的电缆终止选项。可以通过在传感器产品页面的订购信息区域的两个地方查看特定传感器的选项:
如果在–ET,–ETM,–LC,–LQ或–QD版本中提供传感器,则该选项的可用性反映在传感器型号中。例如,034b以034b-et,034b-etm,034b-lc,034b-LQ和034b-qD提供。
如果有的话,所有其他电缆终止选项均在传感器产品页面的“电缆终止选项”下的“订购信息”页面上列出。例如,如034B-L产品页面的订购信息区域所示,使用–CWS,–PT和–PW选项提供034B-L风集。
笔记:由于通常将较新的产品添加到我们的库存中,因此我们将在单个传感器模型下列出多个电缆终止选项,而不是创建多个模型号。例如,HC2S3-L具有将其连接到CS110而不是提供HC2S3-LC模型的–C电缆终止选项。
否。这不是使传感器成为量子传感器的范围。这是光电器与光电器一起使用的轻滤波器的类型,仅允许在PAR频率范围内特定的光波长击中光电器。
For thermopile pyranometers, a thermopile is used within the instrument as the sensor, and the thermal gradients are measured across hot and cold areas (black and white). The radiation intensity is proportional to the temperature differences between the two sensing areas. Accuracy depends upon the sensitivity of the material used in the sensors, the response time, and the distortion characteristics of the material constituting the dome (if present) covering the sensors.
For silicon photocell pyranometers, electric current is generated by a photo-sensitive diode in proportion to solar intensity. Ordinarily, silicon photocell pyranometers are not fully sensitive to the full spectrum of visible light, and they cannot “see” a certain portion of the electromagnetic spectrum such as under cloudy conditions or vegetative canopies. Silicon photocell pyranometers will introduce errors under these conditions. In full sunlight conditions, however, they are calibrated to properly output solar radiation measurements.
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