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The LP02, manufactured by Hukseflux, is an ISO 9060:2018 spectrally flat Class C (second class) pyranometer that monitors solar radiation for the full solar spectrum range. It produces a millivolt signal that is measured directly by a Campbell Scientific data logger. The LP02 can provide solar radiation measurements for a variety of meteorological applications.
続きを読むThe LP02 measures solar radiation with a high-quality blackened thermopile protected by a dome. The blackened thermopile provides a flat spectral response for the full solar spectrum range, which enables the LP02 to be used under plant canopies or lamps, when the sky is cloudy, and for reflected radiation measurements.
The LP02 includes a bubble level, three adjusting screws, and a cable gland. The bubble level and adjusting screws allow the sensor to be leveled without using a leveling base. The gland facilitates cable replacement.
The LP02 produces a millivolt signal that is measured directly by a Campbell Scientific data logger.
Two LP02 pyranometers can be mounted back-to-back to make a low-cost albedometer. Contact Campbell Scientific for more information.
Because the LP02 is a second-class pyranometer, it is acceptable for providing the solar radiation data used in stability estimations (EPA Meteorological Monitoring Guidance for Regulatory Modeling Applications, pages 2-10).
Sensor | Blackened thermopile protected by a dome |
Measurement Description | Monitors solar radiation for the full solar spectrum range |
Spectral Range | 285 to 3000 nm |
Maximum Irradiance | 2000 W/m2 |
Sensitivity | 15 µV/W/m2 (nominal) |
Operating Temperature Range | -40° to +80°C |
Temperature Dependence | < 0.15% per °C |
ISO Classification | ISO 9060:2018 spectrally flat Class C (second class) |
Body Diameter | 7.8 cm (3.1 in.) |
Dome Diameter | 3.0 cm (1.2 in.) |
Height | 5.9 cm (2.3 in.) |
Weight | 363 g (0.8 lb) with 4.6 m (15 ft) cable |
注意: 以下は代表的な互換性情報を示しています。互換性のある製品や互換性のない製品をすべて網羅したリストではありません。
製品 | 互換性 | 注意 |
---|---|---|
21X (リタイア) | ||
CR10 (リタイア) | ||
CR1000 (リタイア) | ||
CR10X (リタイア) | ||
CR200X (リタイア) | ||
CR206X (リタイア) | ||
CR211X (リタイア) | ||
CR216X (リタイア) | ||
CR23X (リタイア) | ||
CR295X (リタイア) | ||
CR300 (リタイア) | ||
CR3000 (リタイア) | ||
CR310 | ||
CR500 (リタイア) | ||
CR5000 (リタイア) | ||
CR510 (リタイア) | ||
CR6 | ||
CR800 (リタイア) | ||
CR850 (リタイア) | ||
CR9000 (リタイア) | ||
CR9000X (リタイア) |
The LP02 includes a bubble level and three adjusting leveling screws, which allow the sensor to be leveled without using a leveling base. The CM225 Solar Sensor Mounting Stand is used to attach the sensor to a crossarm. The CM225 consists of a rectangular plate, mounting bracket, U-bolts, washers, lock washers, and nuts. The LP02 should be mounted away from all obstructions and reflective surfaces that might adversely affect the measurement.
If the sensor needs to be mounted at an angle, a CM255 or CM255LS adjustable-angle mount can be used instead.
LP02-Lに関するよくある質問の数: 12
すべて展開すべて折りたたむ
Yes. It is recommended to clean the dome weekly. However, depending on the environment the pyranometer is deployed in, it may need to be cleaned more frequently—perhaps daily. The frequency of the cleaning schedule varies based on the amount of buildup on the dome caused by precipitation, dust, and biological films.
The LP02-L produces an analog millivolt signal that is linearly related to the amount of solar radiation incident on the device. This relationship is based on a calibration coefficient that is entered in the data logger program.
Yes. Depending on the application, it is recommended to have the sensor calibrated every one to two years.
Perhaps, but it is more likely that there is a wiring or programming issue. If the pyranometer is reading 0 W/m2, separate it from the data logger and measure the resistance across the sensor leads. If the reading is approximately 0 ohms, the sensor has likely been damaged and will need to be repaired or replaced. For information about the process of returning equipment to Campbell Scientific, refer to the Repair and Calibration page.
The LP02-L measures solar irradiance with primary units of W/m2 and over a range of 0 to ≈1000 W/m2 for terrestrial radiation. Other units can be measured with modifications to the measurement instruction in the data logger’s program.
すべてのセンサに異なるケーブル終端オプションがあるわけではありません。特定のセンサで利用可能なオプションは、センサ製品ページの注文情報エリアの 2 つの場所で確認できます。
モデル番号
ケーブル終端オプション リスト
センサが –ET、–ETM、–LC、–LQ、または –QD バージョンで提供されている場合、そのオプションが利用可能かどうかはセンサモデル番号に反映されます。たとえば、034B は 034B-ET、034B-ETM、034B-LC、034B-LQ、および 034B-QD として提供されています。
その他のすべてのケーブル終端オプション (利用可能な場合) は、センサ製品ページの注文情報エリアの「ケーブル終端オプション」の下にリストされています。たとえば、034B-L 風力発電セットは、034B-L 製品ページの注文情報エリアに示されているように、–CWS、–PT、および –PW オプションで提供されています。
注意: 新しい製品が在庫に追加されると、通常は複数のモデル番号を作成するのではなく、1 つのセンサモデルの下に複数のケーブル終端オプションをリストします。たとえば、HC2S3-L には、HC2S3-LC モデルではなく、CS110 に接続するための –C ケーブル終端オプションがあります。
Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.
For best results, use a differential voltage instruction, such as VoltDiff(). A single-ended voltage instruction, VoltSe(), could be used; however, this would not take full advantage of input reversal, which allows for the subtraction in common-mode gain errors. For more information, see the “The Benefits of Input Reversal and Excitation Reversal for Voltage Measurements” white paper.
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact Campbell Scientific for assistance.
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.
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