Hukseflux SR30-M2-D1 User manual

Copyright by Hukseflux | manual v2203 | www.hukseflux.com | [e-mail]
USER MANUAL SR30-M2-D1
Digital Class A (secondary standard)
pyranometer with heating and tilt sensor
Hukseflux
Thermal Sensors
compliant with IEC
61724-1:2017 Class A

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Cautionary statements
Cautionary statements are subdivided into four categories: danger, warning, caution and
notice according to the severity of the risk.
DANGER
Failure to comply with a danger statement will lead to death or serious
physical injuries.
WARNING
Failure to comply with a warning statement may lead to risk of death or
serious physical injuries.
CAUTION
Failure to comply with a caution statement may lead to risk of minor or
moderate physical injuries.
NOTICE
Failure to comply with a notice may lead to damage to equipment or may
compromise reliable operation of the instrument.

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Contents
Cautionary statements 2
Contents 3
List of symbols 5
Introduction 6
1Ordering and checking at delivery 13
1.1 Ordering SR30-M2-D1 13
1.2 Included items 14
1.3 Quick instrument check 14
2Instrument principle and theory 15
2.1 Why a “spectrally flat” pyranometer? 18
2.2 Operating modes: heating and ventilation 20
2.3 Overview of remote diagnostics 21
2.4 Use of the tilt sensor 22
3Specifications of SR30-M2-D1 23
3.1 Specifications of SR30-M2-D1 23
3.2 Dimensions of SR30-M2-D1 29
4Standards and recommended practices for use 30
4.1 Classification standards 30
4.2 General use for solar radiation measurement 30
4.3 Specific use for outdoor PV system performance testing 31
4.4 Specific use in meteorology and climatology 31
4.5 General use for sunshine duration measurement 32
5Installation of SR30-M2-D1 33
5.1 Site selection and mechanical installation 33
5.2 Installation of the sun screen 35
5.3 Installation of optional mounts 36
5.4 Electrical installation 40
5.5 Internal protection 42
5.6 Connecting to an RS-485 network 42
5.7 Electrical isolation, grounding and shield connection 44
5.8 Cabling requirements 46
5.9 A PC as RS-485 master 47
6Communication with SR30-M2-D1 48
6.1 PC communication: Hukseflux Sensor Manager software 48
6.2 Network communication: getting started 48
6.3 Changing the device address and serial communication settings 50
7Use of remote diagnostics 51
7.1 Recommendations 51
7.2 Sensor body temperature 51
7.3 Tilt angle 52
7.4 Internal relative humidity 52
7.5 Heater current 52
7.6 Ventilator current 53
7.7 Ventilator speed 53

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8Making a dependable measurement 54
8.1 The concept of dependability 54
8.2 Reliability of the measurement 55
8.3 Repair and maintenance 56
8.4 Uncertainty evaluation 56
9Maintenance and trouble shooting 59
9.1 Recommended maintenance and quality assurance 59
9.2 Trouble shooting 60
9.3 Calibration and checks in the field 62
9.4 Data quality assurance 63
10 Appendices 65
10.1 Appendix on tools for SR30-M2-D1 65
10.2 Appendix on spare parts for SR30-M2-D1 65
10.3 Appendix on the ventilator 66
10.4 Appendix on standards for classification and calibration 67
10.5 Appendix on calibration hierarchy 67
10.6 Appendix on meteorological radiation quantities 69
10.7 Appendix on ISO and WMO classification tables 70
10.8 Appendix on ISO 9060:1990 classification no longer valid 72
10.9 Appendix on definition of pyranometer specifications 73
10.10 Appendix on terminology / glossary 75
10.11 Appendix on function codes, register and coil overview 76
10.12 Appendix on electromagnetic compatibility (EMC) testing 80
10.13 EU declaration of conformity 81

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List of symbols
Quantities Symbol Unit
Sensitivity S V/(W/m2)
Temperature T °C
Solar irradiance E W/m2
Plane of Array irradiance GiW/m2
Solar radiant exposure H W∙h/m2
Time in hours h h
Tilt angle relative to horizontal θh°
Relative humidity RH %
Pressure p bar
Temperature coefficient a 1/°C²
Temperature coefficient b 1/°C
Temperature coefficient c -
(see also appendix 10.6 on meteorological quantities)
Subscripts
extended RS-485 common mode range Vcm, max
DC isolation voltage (instrument body to signal ground) Viso
heater power Pheater
Acronyms
ASTM American Society for Testing and Materials
CRC Cyclic Redundancy Check
GHI Global Horizontal Irradiance
IEC International Electrotechnical Commission
ISO International Organization for Standards
LSW Least-Significant Word
MSW Most-Significant Word
POA Plane of Array
PV Photovoltaic
RPM Rounds-per-Minute
SCADA Supervisory Control And Data Acquisition
WMO World Meteorological Organization
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