ClimaVUE™50 是一款一体式气象传感器，能够满足日常天气监测的需求，并兼容 Campbell Scientific 数据采集系统。它采用 SDI-12 输出空气温度、相对湿度、水汽压、气压、风（风速、阵风和风向）、太阳辐射、降水和雷电（次数和距离）。传感器本身无活动部件，功耗低。内置倾斜传感器可以保证长期数据完整性。ClimaVUE™50适用于快速部署、远程安装或加入其它系统等。
All sensors are integrated into a single, small form-factor unit, requiring minimal installation effort. With a robust, no-moving-parts design that prevents errors because of wear or fouling, the ClimaVUE™50 is ideal for long-term, remote installations.
Solar radiation is measured by a pyranometer that is integrated into the lip of the rain gage funnel at the top of the ClimaVUE™50. The miniature pyranometer uses a silicon-cell sensor to measure the total incoming (direct and diffuse) solar radiation. Silicon-cell sensors have excellent response time to changing radiation conditions and acceptable sensitivity across the solar spectrum, which make them well-suited for use on the ClimaVUE™50.
A carefully developed cosine-correcting head ensures accurate readings regardless of sun angle, while the painstakingly researched optical filter material balances cost and performance to ensure the silicon-cell provides the ClimaVUE™50 with good accuracy regardless of temperature or sensor age.
The space underneath the rain gage is where the ClimaVUE™50 measures wind speed. Ultrasonic signals emitted from transducers at right angles to each other bounce off the porous sintered glass plate and back up to the opposite sensor. The speed of sound is affected by the wind, and the wind speed is calculated by measuring differences in the time it takes for sound to travel from the transmitters to the receivers.
The ClimaVUE™50 temperature measurement is made in the center of the anemometer area where a small stainless-steel needle containing a tiny temperature sensor (thermistor) extends from the middle of the four sonic transducers in the center of the anemometer.
Unlike most air temperature measurements, the temperature sensor is not covered with louvered plates to protect it from solar heating. Instead, it sits in open air, susceptible to solar heating of the instrument body. However, the ClimaVUE™50 accurately corrects the measured air temperature because solar radiation and the wind speed are known. These two are the main variables that determine the error between measured air temperature and the actual air temperature. An energy balance equation is then used to calculate what the actual temperature should be to an accuracy of ±0.6°C.
For more information, see the "ClimaVUE™50—Correction of air temperature measurements from a radiation-exposed sensor" technical paper.
The relative humidity sensor on the ClimaVUE™50 is located behind the circular Teflon™ screen close to the sonic transducers. The Teflon screen protects the sensor from liquid water and dust while allowing water vapor to freely pass to the sensor. The ClimaVUE™50 measures relative humidity and temperature and computes vapor pressure.
The ClimaVUE™50 contains a 9.31 cm (3.67 in.) diameter rain-collection funnel. A spring in the funnel acts as a filter to keep out large particles while allowing enough flow so water does not back up. Rain collected by the funnel exits the funnel through a precision flared hole that forms the rain into drops of a known size. The falling drops hit and momentarily bridge the gap between two gold pins, creating an electrical pulse.
The ClimaVUE™50 counts the pulses (drops) and calculates the water volume. As the rain intensity increases, the drops become smaller, but the ClimaVUE™50 firmware contains an algorithm to automatically compensate for drop size as the rain increases.
Note: This non-heated sensor is not suitable for solid precipitation measurements or riming environments.
The ClimaVUE™50 is also equipped with a tilt sensor. The primary use of the tilt sensor data is to ensure the ClimaVUE™50 remains level at all times. Regularly check X and Y tilt data to ensure the ClimaVUE™50 is level; if it has tilted, return to the site and level again. Three degrees off level can cause errors in the rain and solar radiation measurements. Although this sensor's readings may be used to level the instrument during installation, it is much easier to use the small bubble level on the bottom of the anemometer plate.
The ClimaVUE™50 includes a V-bolt for mounting to a pipe with a nominal outer diameter of 31.8 to 50.8 mm (1.25 to 2.0 in.). This allows the sensor to mount directly to a tripod mast or CM300-series mounting pole, or to a crossarm using the 17387 mounting pipe kit.
|Measurements Made||Air temperature, barometric pressure, lightning average distance, lightning strike count, precipitation, relative humidity, solar radiation, tilt, wind direction, and wind speed.|
|Operating Temperature Range||-50° to +60°C (Except the barometer and RH: -40° to +60°C.)|
|Minimum Supply Voltage||3.6 Vdc continuous|
|Maximum Supply Voltage||15.0 Vdc continuous|
|Minimum Digital Input Voltage||
|Typical Digital Input Voltage||
|Maximum Digital Input Voltage||
|Typical Current Drain @ 12 Vdc||< 1 mA (average)|
|Typical Measurement Duration||110 ms|
|Maximum Measurement Duration||3,000 ms|
|Maximum Polling Frequency||10 s|
|Application of Council Directive(s)||
|Standards to Which Conformity Is Declared||
|Connection Description||25 mm (10 in.) pigtail with M12 pin (male) 5-pin 316 stainless-steel knurl|
|Diameter||10 cm (4 in.) including rain gage funnel|
|Height||34 cm (13.4 in.) including rain gage funnel|
|Weight||839.15 g (1.85 lb)|
|Maximum Peak Current||33 mA|
|Average Using the R7! Command every 10 s||1.0 mA|
|Average Using the R7! Command every 60 s (or slower)||0.4 mA|
|Measurement Range||-50° to +60°C|
|Measurement Range||0 to 100%|
|Accuracy||±3% RH typical (varies with temperature and humidity)|
|Barometer Operating Temperature Range||-40° to +60°C|
|Measurement Range||500 to 1100 hPa|
|Measurement Range||0 to 47 kPa|
|Accuracy or Repeatability||Varies with temperature and humidity; ±0.2 kPa typical below 40°C.|
|Wind Speed Maximum||10 s gust|
|Measurement Range||0 to 30 m/s (0 to 67 mph)|
|Resolution||0.01 m/s (0.02 mph)|
|Accuracy or Repeatability||0.3 m/s or 3% (0.67 mph or 3%), whichever is greater|
|Measurement Range||0° to 359°|
|Measurement Range||0 to 1750 W m-2|
|Resolution||1 W m-2|
|Accuracy||±5% of measurement (typical)|
|Spectral Range||300 to 1150 nm|
|Measurement Range||0 to 400 mm/h (15.75 in./h)|
|Accuracy||±5% of measurement (from 0 to 50 mm/h or 0 to 1.97 in./h)|
|Measurement Range||-90° to +90°|
Lightning Strike Count
|Measurement Range||0 to 65,535 strikes|
|Accuracy||> 25% detection at < 10 km typical (variable with distance)|
Lightning Average Distance
|Measurement Range||0 to 40 km (0 to 24.9 mi)|
|Resolution||3 km (1.86 mi)|
An example CR1000X program that uses the R7! SDI-12 command to retrieve data. The program adjusts the barometric pressure measurement to sea level. The adjustment is entered as a constant in the beginning of the program. It assumes the site elevation is 1382 m, and a different value is required for different site elevations.
This program also includes instructions that set wind measurements that are less than 0 to the last valid measurement. These instructions are needed because high winds with rain can temporarily interfere with sonic wind measurements.
Internally to the ClimaVUE™50, precipitation is continually measured. Solar radiation, wind, and air temperature are measured every 10 seconds; orientation, vapor pressure, atmospheric pressure, and relative humidity are measured every 60 seconds. Querying the sensor more often than two times the measurement interval will return raw values. Querying more often than the measurement interval will result in duplicate values and may cause timing problems in the data logger.
The SDI-12 bus is capable of having at least 10 sensors connected to it, each with 200 feet of cable. With fewer sensors, longer cable lengths are possible.
The average current drain for the ClimaVUE™50 during the quiescent state and routine 10 s wind measurement is on the order of 300 µA. Polling with the aR7! command every 60 seconds increases the average current drain to 0.4 mA. Polling with the aR7! command every 10 seconds increases the average current drain to 1 mA.
The ClimaVUE™50 mounting type can be a meteorological stand, pole in cement, or tripod: 31.8 to 50.8 mm, 1.25 to 2.0 in. diameter. The ClimaVUE™50 is fitted with a V-bolt, allowing it to be mounted on top of most posts, poles, tripods, etc. Use a wrench to tighten the bolts, securing the ClimaVUE™50 flat and tight against the top of the stand.
The ClimaVUE™50 collects all the information necessary to correct for absorbed radiation using an energy balance approach.
The ClimaVUE™50 is a microclimate sensor, so you should position it to be representative of the climate relevant to the research questions you are asking. FAO56 gives specific guidelines to the positioning and field size of sensors. If you intend to use the sensor for reference ET, follow those guidelines.Refer to the following: http://www.fao.org/docrep/X0490E/X0490E00.htm.
The ClimaVUE™50 does need to be powered continuously to make the routine wind measurements (every 10 seconds) that are combined to give the wind speed and direction. If you only power up and quickly grab a measurement, those wind speed and direction measurements will be of little value, given the inherently variable nature of wind. Campbell Scientific highly recommends that you power the ClimaVUE™50 instruments continuously for reliable wind measurement. The average current drain for the ClimaVUE™50 during the quiescent state and routine 10 s wind measurement is on the order of 300 microAmps, so battery drain from continuous power should be minimal.
We do not have a heated version of the ClimaVUE™50 at this time. The model to correct the air temperature is based on the energy balance and should be good in all situations in which the radiation and wind sensors can collect reliable data; however, unintentional burial in snow and ice may impede the function of both. The ClimaVUE™50 will not be a universally great fit for all climates. If the winter precipitation is critical for your study, other instruments will be necessary.
See the maintenance section of the manual for recommendations.
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。