User guide

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TABLE OF CONTENTS
IMPORTANT USER INFORMATION........................................................................................................................................ 2
WARRANTY AND LIABILITY.....................................................................................................................................................2
DECLARATION OF CONFORMITY ......................................................................................................................................... 3
TABLE OF CONTENTS.................................................................................................................................................................4
INTRODUCTION ............................................................................................................................................................................ 5
1 INSTALLATION AND OPERATION................................................................................................................................6
1.1 Delivery................................................................................................................................... 6
1.2 Contents of delivery ................................................................................................................ 6
1.3 Mechanical installation............................................................................................................ 6
1.4 Electrical installation ............................................................................................................... 7
2 OPERATION............................................................................................................................................................................ 8
2.1 Measurement of direct solar radiation..................................................................................... 8
2.2 Measurement of instrument temperature ................................................................................ 8
3 MAINTENANCE ..................................................................................................................................................................... 9
4 PRINCIPLE COMPONENTS OF PYRHELIOMETERS.............................................................................................. 10
4.1 Window ................................................................................................................................. 10
4.2 Detector ................................................................................................................................ 10
4.3 Housing ................................................................................................................................ 10
4.4 Drying cartridge .................................................................................................................... 10
4.5 Cable and connector .............................................................................................................10
5 PYRHELIOMETER PHYSICAL PROPERTIES............................................................................................................. 11
5.1 Spectral range ....................................................................................................................... 11
5.2 Sensitivity.............................................................................................................................. 11
5.3 Impedance ............................................................................................................................ 11
5.4 Response time ...................................................................................................................... 11
5.5 Operating temperature.......................................................................................................... 11
5.6 Field of view.......................................................................................................................... 12
5.7 Environmental ....................................................................................................................... 12
6 MEASUREMENT ACCURACY ........................................................................................................................................ 13
6.1 Non linearity ......................................................................................................................... 13
6.2 Temperature dependence...................................................................................................... 13
6.3 Zero offset B ......................................................................................................................... 13
6.4 Non-stability.......................................................................................................................... 14
6.5 Spectral selectivity................................................................................................................. 14
7 CALIBRATION..................................................................................................................................................................... 15
7.1 Calibration principle.............................................................................................................. 15
7.2 Calibration procedure at Kipp & Zonen.................................................................................. 15
7.3 Traceability to world radiometric reference ........................................................................... 15
8 RECALIBRATION ............................................................................................................................................................... 16
9 FREQUENTLY ASKED QUESTIONS ............................................................................................................................ 16
10 TROUBLE SHOOTING ................................................................................................................................................. 16
APPENDIX I RADIOMETRIC TERMINOLOGY .................................................................................................................. 17
APPENDIX II 10K THERMISTOR SPECIFICATIONS ...................................................................................................... 18
APPENDIX III PT-100 SPECIFICATIONS ............................................................................................................................ 19
APPENDIX IV MAIN SPECIFICATIONS ............................................................................................................................... 20
APPENDIX V LIST OF WORLD AND REGIONAL RADIATION CENTRES .............................................................. 21
APPENDIX VI RECALIBRATION SERVICE ......................................................................................................................... 22