NR01 4-Component Net Radiometer
Forschungsstandard
Robust—4-Komponenten-Strahlungsensor, der wenig Wartung erfordert
wetter wasser energie gas flux and turbulence bauwerke boden

Überblick

Der NR01 ist ein Strahlungsbilanzsensor mit Forschungsstandard. Er bestimmt die Energiebilanz zwischen eingehender kurzwelliger und langwelliger infraroter Strahlung gegenüber von der Oberfläche reflektierter kurzwelliger und ausgehender Infrarotstrahlung. Unsere Logger messen die Ausgabe des NR01 und kontrollieren die interne Heizung.

Das NR01 ist ein Sensor für professionelle Energiebilanzforschung und wird auch in EC-Systemen eingesetzt.  

Zu beachten: NR01s mit Seriennummern kleiner als 2313 verwenden die Halterung #21271, NR01s mit einer Seriennummer größer als 2312 brauchen sie nicht.

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Funktionen und Vorteile

  • Internal RTD provides temperature compensation of measurements
  • Research-grade performance
  • Internal 1-W heater reduces formation of dew and melts frost
  • Separate outputs of short-wave and long-wave infrared radiation for better accuracy and more thorough quality assurance
  • Robust—only requiring limited maintenance

Bilder

Technische Beschreibung

The NR01 consists of a pyranometer and pyrgeometer pair that faces upward and a complementary pair that faces downward. The pyranometers and pyrgeometers measure short-wave and far infrared radiation, respectively.

The NR01 includes an on-board RTD to measure the radiometer’s internal temperature and a 1-W heater that minimizes the formation of dew and melts frost. To reduce current drain, a relay is typically used to turn on the heater only when the solar radiation is less than 20 W/m2.

Campbell Scientific's CR3000 and CR5000 dataloggers are ideal for measuring this radiometer. A CR1000 can also be used, but a 4WPB100 module is required to measure the internal RTD.

Spezifikationen

Sensor Description Hukseflux’s SR01 ISO-class, thermopile pyranometer, IR01 pyrgeometer, PT100 RTD
Response Time 18 s
Sensitivity 10 to 40 μV W-1 m2
Expected Output Range -0.1 to +50 mV
Expected Accuracy for Daily Totals ±10%
Heater 90 ohm, 1.6 W (at 12 Vdc)
Operating Temperature Range -40° to +80°C
Heater Current Drain ~140 mA
Dimensions 26.3 x 11.3 x 12.1 cm (10.4 x 4.4 x 4.8 in.)
Weight
  • 1.3 kg (2.9 lb) with 5 m (16.4 ft) cable
  • 0.9 kg (2 lb) sensor only

Pyranometer

Spectral Range 305 to 2800 nm

Pyrgeometer

Spectral Range 4500 to 50,000 nm

Kompatibel mit

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Datenlogger

Product Compatible Note
CR1000 (retired) A 4WPB100 PRT Bridge Module is required to measure the internal RTD.
CR1000X A 4WPB100 PRT Bridge Module is required to measure the internal RTD.
CR200X (retired)
CR216X (retired)
CR3000
CR3000
CR5000 (retired)
CR6
CR800
CR850
CR9000X (retired) A 4WPB100 PRT Bridge Module is required to measure the internal RTD.

Halterungen und Masten

Product Compatible Note
NR Sensor Mount

Additional Compatibility Information

Mounting

To avoid shading or reflections and to promote spatial averaging, the NR01 should be mounted at least 1.5 m above the ground or crop canopy and away from all obstructions or reflective surfaces that might adversely affect the measurement. Campbell Scientific recommends mounting the NR01 to a CM300-series mounting pole at least 25 feet away from other mounting structures. The NR01 is attached to the CM300-series mounting pole via a CM204 or CM206 crossarm.

Dokumente

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FAQs für

Number of FAQs related to NR01: 12

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  1. Shading and reflection are important aspects to consider. The sensor should have a clear view of the upward hemisphere of the sky. To avoid shading effects and to promote spatial averaging, the sensor  should be mounted at least 1.5 m above the ground surface.

  2. Campbell Scientific recommends that the sensor be mounted to a separate vertical pipe at least 25 ft from any other mounting structures.

  3. As of June 2013, all of our current and retired net radiation sensors can be mounted using this kit. These include:

    • Current sensors: CNR4-L, NR-LITE2-L, and NR01-L
    • Retired sensors: CNR1, CNR1-L, CNR2-L, NR-LITE-L, and Q7.1-L
  4. It is possible that an older version of Short Cut is being used. Download the latest version of Short Cut.

    For programming assistance, consult the NR01-L instruction manual. For additional assistance, contact Campbell Scientific.

  5. Only one 4WPB100 is needed to measure the internal PRT in the radiometer.

  6. Mount the net radiometer so that no shadow will be cast on it at any time of day from obstructions such as trees, buildings, the mast, or the structure on which it is mounted.

    Campbell Scientific recommends installing a net radiometer in an open area, away from the main weather station structure on a separate vertical mast. If it is necessary to install this sensor on the main tall tower (30 ft or taller), the sensor should be installed at the top of the tower. In the northern hemisphere, the sensor should be facing south. In the southern hemisphere, the sensor should be facing north. If the tower uses a solar power system (that is, solar panels), ensure that the solar panels are installed away from the main tower.

  7. The CR1000 requires a 4WPB100 to measure the internal PRT. (Dataloggers such as the CR3000 and CR5000 have the necessary PRT bridge module built in to measure the PRT.) Note that the CNR4-L also includes an internal thermistor, which can be directly measured by the CR1000. Because of this, when using a CR1000, Campbell Scientific typically recommends monitoring the internal temperature of the CNR4-L using its internal thermistor instead of the PRT. 

  8. 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.

  9. 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:

    • An –LC model has a user-specified cable length for connection to an ET107, CS110, or retired Metdata1.
    • An –LQ model has a user-specified cable length for connection to a RAWS-P weather station.

    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.

    • –ET models terminate with the connector for an ET107 weather station.
    • –ETM models terminate with the connector for an ET107 weather station, but they also include a special system mounting, which is often convenient when purchasing a replacement part.
    • –QD models terminate with the connector for a RAWS-F Quick Deployment Station.
    • –PW models terminate with the connector for a PWENC or pre-wired system.