CNR4 Net Radiometer Revision: 9/13 Copyright © 2000-2013 Campbell Scientific, Inc. Warranty “PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding Campbell pricelist or product manual. Products not manufactured, but that are re-sold by Campbell, are warranted only to the limits extended by the original manufacturer. Batteries, fine-wire thermocouples, desiccant, and other consumables have no warranty. Campbell’s obligation under this warranty is limited to repairing or replacing (at Campbell’s option) defective products, which shall be the sole and exclusive remedy under this warranty. The customer shall assume all costs of removing, reinstalling, and shipping defective products to Campbell. Campbell will return such products by surface carrier prepaid within the continental United States of America. To all other locations, Campbell will return such products best way CIP (Port of Entry) INCOTERM® 2010, prepaid. This warranty shall not apply to any products which have been subjected to modification, misuse, neglect, improper service, accidents of nature, or shipping damage. This warranty is in lieu of all other warranties, expressed or implied. The warranty for installation services performed by Campbell such as programming to customer specifications, electrical connections to products manufactured by Campbell, and product specific training, is part of Campbell’s product warranty. CAMPBELL EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Campbell is not liable for any special, indirect, incidental, and/or consequential damages.” Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit www.campbellsci.com to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000. After an applications engineer determines the nature of the problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. Campbell Scientific’s shipping address is: CAMPBELL SCIENTIFIC, INC. RMA#_____ 815 West 1800 North Logan, Utah 84321-1784 For all returns, the customer must fill out a “Statement of Product Cleanliness and Decontamination” form and comply with the requirements specified in it. The form is available from our web site at www.campbellsci.com/repair. A completed form must be either emailed to [email protected] or faxed to (435) 227-9106. Campbell Scientific is unable to process any returns until we receive this form. If the form is not received within three days of product receipt or is incomplete, the product will be returned to the customer at the customer’s expense. Campbell Scientific reserves the right to refuse service on products that were exposed to contaminants that may cause health or safety concerns for our employees. 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. Cautionary Statements...............................................1 3. Initial Inspection .........................................................1 3.1 Ships With............................................................................................1 4. Quickstart ....................................................................2 4.1 Siting Considerations ...........................................................................2 4.2 Mounting..............................................................................................2 4.3 Use SCWin to Program Datalogger and Generate Wiring Diagram ....4 5. Overview......................................................................7 6. Specifications .............................................................8 6.1 CNR4 Specifications..........................................................................10 6.2 Pyranometer Specifications................................................................10 6.3 Pyrgeometer Specifications................................................................11 6.4 Optional CNF4 Heater/Ventilator ......................................................12 6.4.1 CNF4 Specifications ...................................................................12 7. Operation...................................................................13 7.1 Using the CNR4 in the Four Separate Components Mode.................13 7.1.1 Measuring Short-wave Solar Radiation with Pyranometer.........13 7.1.2 Measuring Long-wave Far Infrared Radiation with Pyrgeometer.............................................................................13 7.1.3 Measuring CNR4 Temperature with Thermistor ........................14 7.1.4 Calculation of Albedo .................................................................16 7.1.5 Calculation of Net Short-wave Radiation ...................................17 7.1.6 Calculation of Net Long-wave Radiation....................................17 7.1.7 Calculation of Net (Total) Radiation...........................................18 7.2 Wiring ................................................................................................18 7.3 Datalogger Programming ...................................................................21 7.3.1 Sensor Sensitivity........................................................................21 7.3.2 Example Programs ......................................................................21 7.3.2.1 Example 1, CR1000 Program Using Differential Measurements...............................................................21 7.3.2.2 Example 2, CR3000 Program Using Differential Measurements...............................................................24 7.3.2.3 Example 3, CR5000 Program Using Differential Measurements...............................................................27 i Table of Contents 8. Troubleshooting........................................................30 8.1 Testing the Pyranometer.................................................................... 30 8.2 Testing the Pyrgeometer.................................................................... 31 8.3 Testing the Thermistor ...................................................................... 31 8.4 Testing the Pt-100 ............................................................................. 31 9. Maintenance and Recalibration ...............................32 9.1 Cleaning Windows and Domes ......................................................... 32 9.2 Recalibration ..................................................................................... 32 9.3 Replacing the Drying Cartridge......................................................... 32 9.4 Replacement Parts ............................................................................. 33 Appendices A. CNR4 Performance and Measurements under Different Conditions .............................................A-1 B. CNF4 Heater/Ventilator...........................................B-1 B.1 General Information ........................................................................ B-1 B.2 Attaching the Optional CNF4 Heater/Ventilator Unit to CNR4...... B-3 B.3 Wiring.............................................................................................. B-7 B.4 Example B, CR3000 Datalogger Program with Heater/ Ventilator Control........................................................................ B-8 B.5 CNF4 Heater/Ventilator Maintenance........................................... B-11 B.5.1 Testing the Heater .................................................................. B-11 B.5.2 Testing the Ventilator............................................................. B-11 B.5.3 Replacing the Filter for the Ventilator.................................... B-11 C. CR3000 Program for Measuring Pt-100 Temperature Sensor.............................................C-1 Figures 4-1. Attaching the mounting rod to the CNR4 body................................... 2 4-2. Attaching the CNR4 onto the mounting rod (pn 26120) using vertical pole or horizontal crossarm................................................. 3 6-1. The CNR4 net radiometer with cables and mounting rod, top view.... 9 6-2. The CNR4 net radiometer with CNF 4 heater/ventilator unit, top view.................................................................................................. 9 7-1. The CNR4 sensor with SOLAR and TEMP cables ........................... 18 7-2. The marks on the end of the CNR4: S for SOLAR cable, and T for TEMP cable.............................................................................. 19 7-3. Labels on the pigtail end of the SOLAR cable .................................. 19 7-4. Labels on the pigtail end of the TEMP cable. ................................... 20 9-1. Replacing the drying cartridge .......................................................... 33 A-1. Different measurement conditions and signals...............................