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IEC 60904-4
Edition 2.0 2019-11
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Photovoltaic devices –
Part 4: Reference solar Photovoltaic reference devices – Procedures
for establishing calibration traceability
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IEC 60904-4
Edition 2.0 2019-11
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Photovoltaic devices –
Part 4: Reference solar Photovoltaic reference devices – Procedures
for establishing calibration traceability
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-7608-2
– 2 – IEC 60904-4:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements for traceable calibration procedures of PV reference solar devices . 9
5 Uncertainty analysis . 10
6 Calibration report . 10
7 Marking . 11
Annex A (informative) Examples of validated calibration procedures . 12
A.1 General . 12
A.1.1 Overview . 12
A.1.2 Examples of validated methods . 12
A.1.3 List of common symbols . 12
A.1.4 Common formulae . 13
A.1.5 Reference documents . 15
A.2 Global sunlight method (GSM) . 15
A.2.1 General . 15
A.2.2 Equipment . 16
A.2.3 Measurements . 16
A.2.4 Data analysis . 17
A.2.5 Uncertainty estimates . 19
A.2.6 Reference documents . 19
A.3 Differential spectral responsivity calibration (DSR calibration) . 20
A.3.1 General . 20
A.3.2 Equipment . 20
A.3.3 Test procedure . 21
A.3.4 Data analysis . 22
A.3.5 Uncertainty estimate . 24
A.3.6 Reference documents . 27
A.4 Solar simulator method(SSM) . 28
A.4.1 General . 28
A.4.2 Equipment . 28
A.4.3 Calibration procedure . 28
A.4.4 Data analysis . 29
A.4.5 Uncertainty estimate . 29
A.4.6 Reference documents . 30
A.5 Direct sunlight method (DSM) . 30
A.5.1 General . 30
A.5.2 Equipment . 31
A.5.3 Measurements . 31
A.5.4 Data analysis . 31
A.5.5 Uncertainty estimate . 32
A.5.6 Reference documents . 32
Bibliography . 34
Figure 1 – Schematic of most common reference instruments and transfer methods
used in the traceability chains for solar irradiance detectors . 9
Figure A.1 – Block diagram of differential spectral responsivity calibration
superimposing chopped monochromatic radiation DE(l) and DC bias radiation E . 25
b
Figure A.2 – Optical arrangement of differential spectral responsivity calibration . 27
Figure A.3 – Schematic apparatus of the solar simulator method . 30
Table 1 – Examples of reference instruments used in a traceability chain of time and
solar irradiance . 9
Table A.1 – Typical uncertainty components (k = 2) of global sunlight method . 19
Table A.2 – Typical Uncertainty components (k = 2) of differential spectral responsivity
calibration method on PV reference devices . 24
Table A.3 – Example of uncertainty components (k = 2) of a solar simulator method
calibration . 29
Table A.4 – Typical uncertainty components (k = 2) of a solar simulator method
calibration when WRR traceable cavity radiometer is used. 29
Table A.5 – Typical uncertainty components (k = 2) of a direct sunlight method using
temperature dependent spectral correction factor (Formula (A.16)), without applying
a correction factor for the WRR to SI scale . 32
– 4 – IEC 60904-4:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC DEVICES –
Part 4: Reference solar Photovoltaic reference devices –
Procedures for establishing calibration traceability
FOREWORD
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International Standard IEC 60904-4 has been prepared by IEC technical committee 82: Solar
photovoltaic energy systems.
This second edition cancels and replaces the first edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with r
...