Campbell Scientific CNR4 Net Radiometer - Manual (Page 5)

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