Kipp&Zonen CNR 4 Net Radiometers User Manual
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3
CONTENTS
IMPORTANT USER INFORMATION ................................................................................................................................... 1
DECLARATION OF CONFORMITY ..................................................................................................................................... 2
CONTENTS ................................................................................................................................................................................. 3
1
GENERAL INFORMATION ............................................................................................................................................ 4
1.1
Connecting the CNR 4 ............................................................................................................ 5
1.1.1
The difference between temperature and sensor connection ........................................... 5
1.1.2
The radiometer Sensor connector (S) ............................................................................... 5
1.1.3
The radiometer Temperature connector (T) ..................................................................... 7
1.1.4
The (optional) CNF 4 connector ....................................................................................... 8
1.1.5
Using the CNR 4 calibration factors ................................................................................. 8
1.1.6
Using the CNR 4 measuring Net Radiation ....................................................................... 9
1.1.6.1
Measuring Solar radiation with the pyranometer ........................................................................... 9
1.1.6.2
Measuring Far Infrared radiation with the pyrgeometer ................................................................ 9
1.1.6.3
Measuring the CNR 4's body temperature ..................................................................................... 9
1.1.6.4
Calculation of the albedo for solar radiation ............................................................................... 12
1.1.6.5
Calculation of the Net Solar radiation ......................................................................................... 12
1.1.6.6
Calculation of the Net (total) radiation ........................................................................................ 13
2
CNR 4 PROPERTIES ..................................................................................................................................................... 16
2.1
Properties of the CNR 4 Net-Radiometer ............................................................................... 16
2.1.1
Specifications of the CNR 4 ........................................................................................... 17
2.2
Properties of the pyranometer .............................................................................................. 17
2.2.1
Specifications of the pyranometer ................................................................................. 18
2.2.2
Spectral properties of the pyranometer ......................................................................... 20
2.2.3
Directional / Cosine response of the pyranometer ......................................................... 20
2.3
Properties of the pyrgeometer .............................................................................................. 22
2.3.1
Window heating offset .................................................................................................. 22
2.3.2
Water deposition on the pyrgeometer window ............................................................... 22
2.3.3
Specifications of the Pyrgeometer ................................................................................. 22
2.3.4
Spectral properties of the pyrgeometer ......................................................................... 24
2.3.5
Directional / Cosine response of the pyrgeometer ......................................................... 24
2.4
Properties of the CNF 4 (optional) ventilation unit ................................................................ 25
2.4.1
CNF 4 specifications ...................................................................................................... 25
2.5
Properties of the Pt-100 and thermistor ................................................................................ 26
3
CALIBRATION ................................................................................................................................................................ 27
3.1
Calibration of the pyranometers ........................................................................................... 27
3.2
Calibration of the pyrgeometers ........................................................................................... 27
3.3
Recalibration of pyranometers and pyrgeometers ................................................................. 27
3.4
Checking the Pt-100 and Thermistor .................................................................................... 27
4
INSTALLATION AND MAINTENANCE ................................................................................................................... 28
4.1
Replacing the drying cartridge ............................................................................................. 28
4.2
Replacing the Ventilator Filter .............................................................................................. 29
5
TROUBLE SHOOTING .................................................................................................................................................. 30
5.1
Testing the pyranometer ...................................................................................................... 30
5.2
Testing of the pyrgeometer .................................................................................................. 30
5.3
Testing the Pt-100 ................................................................................................................ 31
5.4
Testing the thermistor ......................................................................................................... 31
5.5
Testing the Heater ............................................................................................................... 31
5.6
Testing the Ventilator .......................................................................................................... 31
6
CMB 1 OPTIONAL MOUNTING BRACKET ........................................................................................................... 32
7
DELIVERY ........................................................................................................................................................................ 34
8
RECALIBRATION SERVICE ......................................................................................................................................... 35