Campbell NR-LITE2 Product Manual
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Campbell NR-LITE2 Product Manual

Net radiometer
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NR-LITE2
Net Radiometer
Revision: 6/19
Copyright © 1998 – 2019
Campbell Scientific, Inc.

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Summary of Contents for Campbell NR-LITE2

  • Page 1 NR-LITE2 Net Radiometer Revision: 6/19 Copyright © 1998 – 2019 Campbell Scientific, Inc.
  • Page 2 Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, are warranted only to the limits extended by the original manufacturer.
  • Page 3 Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA) number, contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000. Please write the issued RMA number clearly on the outside of the shipping container. Campbell Scientific’s shipping address is: CAMPBELL SCIENTIFIC, INC.
  • Page 4 Periodically (at least yearly) check electrical ground connections. • WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.

  • Page 5: Table Of Contents

    Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction..............1 2. Precautions ..............1 3. Initial Inspection ............1 Ships With ....................1 4.
  • Page 6 NR-LITE2 components and dimensions (in millimeters) ....5 7-1. Siting and mounting diagram for the NR-LITE2 .........6 7-2. Mounting the NR-LITE2 onto a pole (top) and crossarm (bottom) via the Net Radiation Sensor Mounting Kit ........8 7-3. NR-LITE2 to data logger connections ..........9 8-1.

  • Page 7: Introduction

    If damage to the cable is suspected, contact Campbell Scientific. When installing the NR-LITE2, use only the support arm to rotate the NR- • LITE2. Using the sensor head to rotate the instrument may damage it.

  • Page 8: Quickstart

    Open Short Cut and click Create New Program. Double-click the data logger model. In the Available Sensors and Devices box, type NR-LITE2 or find the sensor in the Sensors > Meteorological > Solar Radiation folder. Double-click NR-LITE2 Net Radiometer (no wind correction). Enter the calibration factor supplied on the manufacturer certificate of calibration;...
  • Page 9 NR-LITE2 Net Radiometer Click the Wiring tab. Click OK after wiring the sensor. Repeat steps three and four for other sensors you want to measure. Click Next. In Output Setup, type the scan rate, a meaningful Table Name, and Data...

  • Page 10: Overview

    Although net radiometers are usually used in meteorology to measure radiation balance, the NR-LITE2 can also be used to measure indoor climate radiative stress. The NR-LITE2 is manufactured by Kipp & Zonen, but cabled for use with Campbell Scientific data loggers.

  • Page 11: Specifications

    Physical dimensions (FIGURE 6-1) Sensor: 8.0 cm (3.1 in) diameter Support arm: 1.6 cm (0.6 in) diameter x 80 cm (31.5 in) L Support arm weight: 635 g (23 oz) Support arm FIGURE 6-1. NR-LITE2 components and dimensions (in millimeters)

  • Page 12: Environmental

    (1 in FIGURE 7-1). To avoid shading or reflection effects and to promote spatial averaging, the NR-LITE2 should be mounted at least 1.5 m above the ground or crop surface. It is recommended that the NR-LITE2 be mounted to a separate vertical pipe at least 25 ft from any other mounting structures (2 in FIGURE 7-1).

  • Page 13: Mounting

    NR-LITE2 Net Radiometer Mounting The Net Radiation Sensor Mounting Kit is used to mount the NR-LITE2 directly to a vertical pipe, or to a CM200-series crossarm. If mounting the sensor to a vertical pipe, ensure that no reflections from the pipe are cast on to the sensor.

  • Page 14: Wiring

    FIGURE 7-2. Mounting the NR-LITE2 onto a pole (top) and crossarm (bottom) via the Net Radiation Sensor Mounting Kit Wiring The NR-LITE2 can be measured with a differential or single-ended terminal on the data logger; a differential terminal is recommended. FIGURE provides the NR-LITE2 wiring.

  • Page 15: Data Logger Programming

    Blue Signal Reference ⏚ (User supplied jumper wire for differential measurement only) Black Shield FIGURE 7-3. NR-LITE2 to data logger connections TABLE 7-1. Wire Color, Function, and Connections to the Data Logger Differential Single-Ended Wire Color Function Data Logger Terminal...

  • Page 16: 7.4.1 Input Range And Integration

    This shows the sensor serial number and a sensitivity, or calibration factor. This calibration factor is used in the data logger program. Always cross-check to ensure that the serial number of the NR-LITE2 and the number on the calibration certificate are identical. The serial number and sensitivity are also shown on a small label attached to the connecting arm near the head of the sensor itself.

  • Page 17: Spectral Properties

    The downward facing sensor has the same sensitivity. However, since the two sensors may not be perfectly symmetrical, this assumption may not always be true, but differences are small. The NR-LITE2 sensitivity is the same for both solar and infrared radiation. • Directional/Cosine Response...

  • Page 18: Sensitivity To Wind Speed

    FIGURE 8-2. Cosine response of a typical net radiometer Sensitivity to Wind Speed The calibration of the NR-LITE2 is carried out at zero wind speed. At any other wind speed, the sensitivity will decrease. It has been shown that this decrease in sensitivity is less than 1% of reading per meter per second wind speed, and the effect is essentially independent of the radiation level.

  • Page 19: Maintenance

    Hold the instrument only by its mounting arm at all times. Do the following: Connect the NR-LITE2 wires to the voltmeter. Connect the red wire to the positive terminal and the blue wire to the negative terminal. Select the most sensitive range on the voltmeter.
  • Page 20 Did you convert the factor to the correct value for the data logger program? (Section 7.4, Data Logger Programming (p. 9) Check the data logger program for errors. If you cannot resolve your problems, please contact Campbell Scientific for further advice.

  • Page 21: Importing Short Cut Code Into Crbasic Editor

    Appendix A. Importing Short Cut Code Into CRBasic Editor Short Cut creates a .DEF file that contains wiring and memory usage information, and a program file that can be imported into the CRBasic Editor. By default, these files reside in the C:\campbellsci\SCWin folder. Import Short Cut program file and wiring information into CRBasic Editor: Create the Short Cut program following the procedure in 4, QuickStart (p.

  • Page 22: Example Programs

    Scan(5,Sec,1,0) 'Default Data Logger Battery Voltage measurement BattV Battery(BattV) 'NR-LITE2 Net Radiometer (no wind speed correction) measurement NR_Wm2 'Note that the calibration factor in the Volt_Diff instruction is 'specific to each sensor. See Section 7.4.2 (p. 10) for details. VoltDiff(NR_Wm2,1,mV50,1,True,0,_60Hz,63.29,0)

  • Page 23: Cr1000X Example Program With Wind Speed Correction

    Correction TABLE provides the wiring for this CR1000X example program. Besides measuring the NR-LITE2, the program also measures wind speed and applies the correction factor as described in Section 8.4, Sensitivity to Wind Speed (p. 12) Average net radiation and wind speed are output every hour.
  • Page 24 '05103 Wind Speed & Direction Sensor measurements WS_ms and WindDir PulseCount(WS_ms,1,P1,5,1,0.098,0) BrHalf(WindDir,1,mV5000,1, Vx1,1,2500,True,20000,60,355,0) WindDir>=360 Then WindDir=0 'NR-LITE2 Net Radiometer (dynamic wind speed correction) 'measurement NR_Wm2 and CNR_Wm2 'Note that the calibration factor in the Volt_Diff instruction is 'specific to each sensor. VoltDiff(NR_Wm2,1,mv200,2,True,0,60,63.29,0 WS_ms>=5 Then CNR_Wm2=NR_Wm2*(1+0.021286*(WS_ms-5))
  • Page 25 Global Sales & Support Network A worldwide network of companies to help meet your needs CANADA GERMANY FRANCE CHINA SPAIN SOUTHEAST ASIA COSTA RICA Campbell Scientific group companies Sales representatives AUSTRALIA BRAZIL SOUTH AFRICA Australia Costa Rica Southeast Asia Garbutt, QLD Australia...

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