Specifications

CNR4 Table of Contents
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1. General Description.....................................................1
2. Sensor Specifications .................................................2
2.1 CNR4 Specifications ................................................................................3
2.2 Pyranometer Specifications ......................................................................4
2.3 Pyrgeometer Specifications ......................................................................5
2.4 Optional CNF4 Heater/Ventilator.............................................................5
2.4.1 CNF4 Specifications .......................................................................6
3. Installation....................................................................6
4. Using the Optional CNF4 Heater/Ventilator Unit.......8
5. Using the CNR4 in the Four Separate Components
Mode ...........................................................................9
5.1 Measuring Short-wave Solar Radiation with Pyranometer ......................9
5.2 Measuring Long-wave Far Infrared Radiation with Pyrgeometer ............9
5.3 Measuring CNR4 Temperature with Thermistor....................................10
5.4 Calculation of Albedo.............................................................................12
5.5 Calculation of Net Short-wave Radiation...............................................13
5.6 Calculation of Net Long-wave Radiation ...............................................13
5.7 Calculation of Net (Total) Radiation ......................................................14
6. Wiring..........................................................................14
7. Datalogger Programming..........................................17
7.1 Sensor Sensitivity ...................................................................................17
7.2 Example Programs..................................................................................17
7.2.1 Example 1, CR1000 Program Using Differential Measurements .17
7.2.2 Example 2, CR3000 Program Using Differential Measurements .21
7.2.3 Example 3, CR5000 Program Using Differential Measurements .24
8. Troubleshooting ........................................................28
8.1 Testing the Pyranometer .........................................................................28
8.2 Testing the Pyrgeometer .........................................................................29
8.3 Testing the Thermistor............................................................................29
8.4 Testing the Pt-100...................................................................................29
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