Kippzonen CNR 4 Net Radiometers Manuel d'utilisateur Page 1

Net RadiometerCNR 4Instruction Manual

9 1.1.6 Using the CNR 4 measuring Net Radiation In the CNR 4 all components are measured separately. This implies that you should

10 Temperature [EC] Resistance [Ω] Temperature [EC] Resistance [Ω] Temperature [EC] Resistance [Ω] -30 -29 -28 -27 -26 -25 -24 -23 -22 -2

11 Temperature [EC] Resistance [Ω] Temperature [EC] Resistance [Ω] Temperature [EC] Resistance [Ω] -30 -29 -28 -27 -26 -25 -24 -23 -22 -2

12 1.1.6.4 Calculation of the albedo for solar radiation The albedo is the ratio of incoming and reflected Solar radiation. It is a figure so

13 1.1.6.6 Calculation of the Net (total) radiation The Net radiation, NR, can be calculated using all 4 sensor measurement results: NR = (E

14 Typical graphs for the pyrgeometers Figure 1.2.2 partly clouded day for the upper pyrgeometer Figure 1.2.3 clear day for the downward fac

15 It is assumed that when ambient temperature varies, the Net Far Infrared radiation remains roughly the same, independent of

16 2 CNR 4 PROPERTIES The CNR 4 consists of two pyranometers, for measuring solar radiation, and of two pyrgeometers for measuring Far Infrar

17 2.1.1 Specifications of the CNR 4 General specifications Environmental 0 - 100% RH (Relative Humidity) Definition Intended for conti

18 2.2.1 Specifications of the pyranometer Pyranometers Specification Unit Value (All indicated values are absolute values) Spectral range nm

1 IMPORTANT USER INFORMATION Reading this entire manual is recommended for full understanding of the use of this product. The exclamati

19 Irradiance: W/m² 0 to 2000 Definition Measurement range Non-stability % < 1 Definition Maximum change of sensitivity per year, percent

20 2.2.2 Spectral properties of the pyranometer The spectral properties of the pyranometer are mainly determined by the properties of the abso

21 Figure 2.4 The directional response, or cosine response, of the pyranometer: On the horizontal axis, the zenith angle is shown (0E zenith a

22 2.3 Properties of the pyrgeometer The pyrgeometer consists of a thermopile sensor and a silicon window integrated in the CNR

23 Definition Instrument sensitivity within a specific spectral range Sensitivity µV/W/m² 5 to 15 Definition Calibration factor Impedance Ω 20

24 2.3.4 Spectral properties of the pyrgeometer The spectral properties of the pyrgeometer are mainly determined by the properties of the abso

25 2.4 Properties of the CNF 4 (optional) ventilation unit The ventilator and heaters purpose is to prevent dew deposition on the pyrgeometer

26 2.5 Properties of the Pt-100 and thermistor The Pt-100 is a common temperature sensor. Essentially it is a resistor that is temperature dep

27 3 CALIBRATION 3.1 Calibration of the pyranometers The primary standard for pyranometers is the World Radiometric Reference. Reference pyr

28 4 INSTALLATION AND MAINTENANCE For measurement of the Net Radiation, it is most important that the instrument is located in

2 DECLARATION OF CONFORMITY According to EC guideline 89/336/EEC 73/23/EEC We: Kipp & Zonen B.V. Delftechpark 36 2

29 4.2 Replacing the Ventilator Filter The CNF 4 ventilation unit has a filter that can be checked and if required cleaned or r

30 5 TROUBLE SHOOTING This chapter describes what to do if there appears to be a problem. The following chapters give individ

31 The CNR 4 body and ambient air should be at the same temperature as much as possible. Let the pyrgeometer rest for at least five minutes to r

32 6 CMB 1 OPTIONAL MOUNTING BRACKET The CMB 1 mounting bracket is ideal for mounting the CNR 4 to a pole or wall. The stainle

33 Fig 7.2 CMB 1 mounting examples with CNR 4, albedometer and pyranometer

34 7 DELIVERY Check the contents of the shipment for completeness (see below) and note whether any damage has occurred during

35 8 RECALIBRATION SERVICE Pyranometers, UV-meters, pyrgeometers, Net radiometers & Sunshine duration meters Kipp & Zonen solar radi

Our customer support remains at your disposal for any maintenance or repair, calibration, supplies and spares.Für Servicearbeiten und Kalibrierung, Ve

3 CONTENTS IMPORTANT USER INFORMATION ...

4 1 GENERAL INFORMATION The CNR 4 is a 4 component net radiometer that measures the energy balance between incoming short-wave a

5 1.1 Connecting the CNR 4 1.1.1 The difference between temperature and sensor connection CNR 4 has several output signals: two voltages for

6 Figure 1.2 The sensor connections of the CNR 4. The sensor has four mV outputs, 2 for the pyranometers and 2 for the pyrgeometers Ground *

7 1.1.3 The radiometer Temperature connector (T) The temperature connector of the CNR 4 carries the signals for the PT-100 and T

8 1.1.4 The (optional) CNF 4 connector The optional ventilator CNF 4 for the CNR 1 has separate wires for heating and ventilati