Celestron CG-4 Manuel d'utilisateur

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Page 1 - INSTRUCTION MANUAL

INSTRUCTION MANUAL0345 200PYRGEOMETERmanualCustomer Support

Page 2 - IMPORTANT USER INFORMATION

GENERAL INFORMATION 9 Within this spectral range the earth is able to maintain an equilibrium temperature by losing a certain quantity of heat

Page 3 - DECLARATION OF CONFORMITY

GENERAL INFORMATION 10 Figure 1.3 Atmospheric radiation (atmospheric window 8 to 14 µm) Where as a pyranometer only receives

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GENERAL INFORMATION 11 = Upward irradiance of the CG 4 sensor [W/m2] Note that the net radiation term (Uemf / S) is mostly negative, so th

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GENERAL INFORMATION 12 • The thermistor contacts a part of the window, it is a blackbody radiator and heat source itself and its materi

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GENERAL INFORMATION 13 1.4.1 How to perform the check? The check must be performed under clear sky conditions. The CG 4 pyrgeometer is opera

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GENERAL INFORMATION 14CG 4 stabilises at < 3 W/m2. The experiment shows that for most practical purposes, CG 4 does not need compensation fo

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GENERAL INFORMATION 15 Due to the thermopile construction and applied thermistor compensation circuit the temperature response is suppressed to

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GENERAL INFORMATION 16

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TECHNICAL DATA 17 2 TECHNICAL DATA 2.1 SPECIFICATIONS OF THE CG 4 PYRGEOMETER Performance Spectral range: 4.5 to 42 µm, 50% points. Se

Page 11 - 1067.5 ⋅⋅+=

TECHNICAL DATA 18 Estimated inaccuracy of measurement: < 7.5 W/m2. Thermistor specifications (only for thermistor version): Type YSI 44

Page 12 - 1067.5 ⋅⋅

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

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TECHNICAL DATA 19 Figure 2.1 CG 4 pyrgeometer outline dimensions

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TECHNICAL DATA 20 2.2 ACCURACY As listed in paragraph 2.1 the sensitivity is cross-correlated to a number of parameters such as temperature a

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TECHNICAL DATA 21 The temperature dependence of the sensitivity is an individual function. For any given CG 4 the curve lies in the region betw

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TECHNICAL DATA 22

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INSTALLATION 23 3 INSTALLATION Reading these instructions before installation is recommended. 3.1 DELIVERY Check the contents of the shipm

Page 18 - Max. 4 W/m

INSTALLATION 24 3.2 MECHANICAL INSTALLATION The mechanical installation of the pyrgeometer must be carried out depending on the application. D

Page 19

INSTALLATION 25 Note: After recalibration and/or reinstallation the nylon insulators must be replaced with new ones to maintain durability.

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INSTALLATION 26 3.2.3 Levelling Accurate measurement of the downward atmospheric long wave radiation requires the proper levelling of the ther

Page 21 - Non- linearity

INSTALLATION 27 Figure 3.2 Mounting of two pyrgeometers. The pyrgeometer must always be mounted with the cable gla

Page 22 - (Typical curves)

INSTALLATION 28 3.3 ELECTRICAL CONNECTION The CG 4 is provided with a 10 m, 6 wire shielded cable (8 wire for the Pt-100 version). The followi

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IMPORTANT USER INFORMATION 2 DECLARATION OF CONFORMITY According to EC guideline 89/336/EEC 73/23/EEC We Kipp & Zonen B.V. Röntgen

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INSTALLATION 29 Looking at the circuit diagram of figure 3.3, it is clear that the impedance of the readout equipment is loading the thermistor

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INSTALLATION 30Kipp & Zonen supplies shielded low-noise extension cables up to lengths of 200 m which are coupled by waterproof connectors

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INSTALLATION 31 Figure 3.5 Example of a CG 4 with a Pt-100 connected to a Campbell data logger For amplification of the p

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OPERATION 33 4 OPERATION After completing the installation the pyrgeometer will be ready for operation. At the end of the paragraph an exampl

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OPERATION 34 4.1.1 Example During field measurements the pyrgeometer is exposed to varying atmospheric conditions with typical radiating prop

Page 30 - Ω or more such as

OPERATION 35 4.1.3 Clear sky conditions Clear sky conditions differ in the way that there is a relative large heat loss caused by the atmosph

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OPERATION 36on many parameters, for example the water vapour content in the atmosphere (Humidity), location of the CG 4 at a certain altitude a

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OPERATION 37 4.2 MEASURING NET RADIATION WITH TWO PYRGEOMETERS With two CG 4’s as a net-pyrgeometer, the long wave radiation balance (also

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OPERATION 38

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TABLE OF CONTENTS 3 TABLE OF CONTENTS IMPORTANT USER INFORMATION ...1 DECLARATION OF CONF

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MAINTENANCE 39 5 MAINTENANCE Once installed the pyrgeometer needs little maintenance. The Silicon window must be inspected at regular inte

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MAINTENANCE 40 It is normal in humid areas to replace the desiccant twice a year. The exchange interval is affected by humidity, change in ai

Page 37 - mid of September

CALIBRATION 41 6 CALIBRATION 6.1 THE CALIBRATION FACTOR The ideal pyrgeometer should always have a constant ratio of voltage output to irra

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CALIBRATION 42 A final St is determined only from one minute St’s determined in periods with net IR-exchange = Ld – Tb481067.5 ⋅⋅−> 40 W/m²

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FREQUENTLY ASKED QUESTIONS (FAQ’S) 43 7 FREQUENTLY ASKED QUESTIONS (FAQ’s) The most frequently asked questions are listed below. For an

Page 40 - MAINTENANCE

FREQUENTLY ASKED QUESTIONS (FAQ’S) 44 normally the cable gland is never touched while the cartridge is removed frequently. So when no care is

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TROUBLE SHOOTING 45 8 TROUBLE SHOOTING Any visible damage or malfunction should be reported to your dealer, who will suggest appropriate acti

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TROUBLE SHOOTING 46

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PART NUMBERS / SPARE PARTS / OPTIONS 47 9 PART NUMBERS / SPARE PARTS / OPTIONS Description Part no. Upper sunscreen (plastic) 0305-166

Page 44 - (Lnet = -150 W/m

PART NUMBERS / SPARE PARTS / OPTIONS 48Description Part no. Mounting plate for 4 unventilated sensors (2 upper and 2 lower) 0012 092 10

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TABLE OF CONTENTS 4 6.2 CALIBRATION PROCEDURE AT KIPP & ZONEN ... 41 6.2.1 The outdoor procedure...

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APPENDIX I 49 APPENDIX I WORLD RADIATION CENTRE INFORMATION The World Radiation Centre capable of Pyrgeometer calibration is: Physikalis

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APPENDIX I 50

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APPENDIX II 51 APPENDIX II THERMISTOR SPECIFICATIONS YSI thermistor 44031 Resistance versus Temperature in °C Temperature [ °C ] Resistan

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APPENDIX II 52

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APPENDIX III 53 APPENDIX III Pt-100 SPECIFICATIONS Pt-100 Resistance versus Temperature in °C Temperature [ °C ] Resistance [ Ω ] Temperat

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APPENDIX III 54

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APPENDIX VI 55 APPENDIX IV RECALIBRATION SERVICE Pyranometers, UV-meters, Pyrgeometers & Sunshine duration sensors Kipp & Zonen s

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APPENDIX VI 56

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APPENDIX VI 57 NAME : COMPANY/INSTITUTE : ADDRESS : POSTCODE +CITY : COUNTRY : PHONE : FAX :  I would like to receive a price list for r

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APPENDIX VI 58

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GENERAL INFORMATION 5 1 GENERAL INFORMATION 1.1 INTRODUCTION Pyrgeometers are recommended by the BSRN (Baseline Surface Radiation Network)

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APPENDIX VI 59 NAME : COMPANY/INSTITUTE : ADDRESS : POSTCODE +CITY : COUNTRY : PHONE : FAX :  I would like to receive a price list for rec

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APPENDIX VI 61 NAME : COMPANY/INSTITUTE : ADDRESS : POSTCODE +CITY : COUNTRY : PHONE : FAX :  I would like to receive a price list for r

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APPENDIX VI 62

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Holland Kipp & Zonen B.V. Röntgenweg 1 2624 BD DELFT T +31 15 269 8000 F +31 15 262 0351 E [email protected] Kipp & Zonen

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GENERAL INFORMATION 6 1.2 PHYSICAL PRINCIPLES OF THE PYRGEOMETER The CG 4 pyrgeometer is provided with a thermal detector. The thermal detec

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GENERAL INFORMATION 7 1.2.1 Properties of the Silicon window CG 4 uses a specially designed pure silicon window. Although the window isn’t h

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GENERAL INFORMATION 8 Figure 1.2 Typical transmittance of a CG 4 window. 1.3 DOWNWARD ATMOSPHERIC LONG WAVE RADIATION Th

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