Hukseflux SR05 series User manual

Copyright by Hukseflux | manual v1801 | www.hukseflux.com | [e-mail]
USER MANUAL
SR05-D1A3-PV
Digital second class pyranometer – alternative
for PV reference cell
Hukseflux
Thermal Sensors

SR05-D1A3-PV manual v1801 2/83
Warning statements
Putting more than 30 Volt across the sensor wiring
of the main power supply can lead to permanent
damage to the sensor.
Keep the voltage on the RS-485 data wiring of
SR05-D1A3-PV between -7 and +12 V to avoid
permanent damage.
For proper instrument grounding: use SR05 with its
original factory-made SR05 cable.
Using the same Modbus address for more than one
device will lead to irregular behaviour of the entire
network.
Disconnect power while performing service or
maintenance.
Locally connect the cable shield to ground if
SR05-D1A3-PV is not connected to ground through
the installation platform.
Modbus®is a registered trademark of Schneider Electric, licensed to the Modbus Organization, Inc.

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Contents
Warning statements 2
Contents 3
List of symbols 5
Introduction 6
1Ordering and checking at delivery 11
1.1 Ordering SR05-D1A3-PV 11
1.2 Included items 13
1.3 Quick instrument check 14
2Instrument principle and theory 15
3Specifications of SR05-D1A3-PV 18
3.1 Specifications of SR05-D1A3-PV 18
3.2 Dimensions of SR05 22
4Standards and recommended practices for use 23
4.1 Classification standard 23
4.2 General use for solar radiation measurement 23
4.3 General use for sunshine duration measurement 23
4.4 Specific use for outdoor PV system performance testing 24
4.5 Specific use in meteorology and climatology 25
5Installation of SR05 26
5.1 Site selection and installation 26
5.2 Mounting and levelling SR05 27
5.3 Installing SR05 27
5.4 Installing SR05 with its ball levelling and tube mount 28
5.5 Placing and removing SR05’s ball levelling shim 30
5.6 Electrical connection of SR05-D1A3-PV: wiring diagram 32
5.7 Grounding and use of the shield 32
5.8 Using SR05-D1A3-PV’s digital output 33
5.9 Using SR05-D1A3-PV’s analogue 0 to 1 V output 36
6Communication with SR05 37
6.1 PC communication: Sensor Manager software 37
6.2 Network communication: function codes, registers, coils 43
6.3 Silicon Reference Cell compatible Modbus output 45
6.4 Standard Hukseflux Modbus Output 48
6.5 Network communication: getting started 53
6.6 Network communication: example master request to SR05 54
7Making a dependable measurement 56
7.1 The concept of dependability 56
7.2 Reliability of the measurement 57
7.3 Speed of repair and maintenance 58
7.4 Uncertainty evaluation 58
8Maintenance and trouble shooting 61
8.1 Recommended maintenance and quality assurance 61
8.2 Trouble shooting 62
8.3 Calibration and checks in the field 63
8.4 Data quality assurance 64
9Appendices 66
9.1 Appendix on cable extension / replacement 66
9.2 Appendix on tools for SR05 68
9.3 Appendix on spare parts for SR05 68

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9.4 Appendix on standards for classification and calibration 69
9.5 Appendix on calibration hierarchy 70
9.6 Appendix on meteorological radiation quantities 71
9.7 Appendix on ISO and WMO classification tables 72
9.8 Appendix on definition of pyranometer specifications 73
9.9 Appendix on terminology / glossary 74
9.10 Appendix on floating point format conversion 75
9.11 Appendix on function codes, register and coil overview 76
9.12 Appendix on the sensor model name in the register 80
9.13 EU declaration of conformity 81

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List of symbols
Quantities SymbolUnit
Voltage output U V
Sensitivity S V/(W/m2)
Solar irradiance E W/m2
Output of 0-1 V U V
Transmitted range of 0-1 V r W/m2
(see also appendix 9.6 on meteorological quantities)
Subscripts
Not applicable
Notation Example
Decimal numbers are indicated without prefix 30
Hexadecimal numbers are indicated with a 0x prefix 0x1E

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Introduction
SR05 series is the most affordable range of pyranometers meeting ISO 9060
requirements. These sensors are ideal for general solar radiation measurements and
popular for monitoring photovoltaic (PV) systems. Model SR05-D1A3–PV is made as a
perfect alternative to PV reference cells. It offers the same Modbus interface as the most
common PV reference cell model for easy compatibility. Relative to PV reference cells,
SR05-D1A3-PV has the advantage of higher stability, independence of the PV cell type or
anti-reflection coating, and better availability and price of recalibration.
SR05 series is an economical range of ISO 9060 second class pyranometers for
measurement of solar radiation received by a plane surface, in W/m2, from a 180 ° field
of view angle. SR05 is perfect for predicting generated power and monitoring the overall
efficiency of PV power plants. Different mounting options are available, allowing SR05 to
be mounted in virtually any situation. The combination of easy installation and its low
cost makes SR05 the preferred solution for commercial scale PV systems.
There are several versions of SR05 series:
•Version SR05-D1A3: digital sensor with Modbus over RS-485 and analogue 0-1 V output
•Version SR05-D2A2: digital sensor with Modbus over TTL and analogue 4–20 mA output
•Version SR05-A1: analogue sensor with analogue millivolt output
and:
•Version SR05-D1A3-PV: digital sensor with Modbus over RS-485, alternative for PV
reference cell
This user manual covers use of SR05-D1A3-PV. Specifications of this version
differ from those of the other digital and analogue sensors in the SR05 series
range. For use of SR05-D1A3 or SR05-D2A2, consult the separate SR05-D1A3 &
SR05-D2A2 user manual. For use of SR05-A1, offering analogue millivolt output,
consult the separate SR05-A1 user manual.
Figure 0.1 SR05-D1A3-PV digital second class pyranometer seen from above

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Model SR05-D1A3-PV has a digital output that is identical to the most commonly used
photovoltaic reference cell with Modbus over RS-485 output. This allows for easy
installation in existing PV monitoring systems, without the need to make major
modifications to data logging software, instrument libraries and infrastructure.
Compared to silicon reference cells, pyranometers offer several advantages such as a
perfect (cosine) directional response and a flat spectral response over a wide range.
Pyranometers therefore measure the maximum available resource and are suitable to act
as a reference for all types (for example amorphous, crystalline or thin-film) of
photovoltaic cells both with and without anti-reflection coating. See also our Application
note “pyranometers versus PV reference cells”.Moreover, since the working principle of a
pyranometer is different from a solar cell, the pyranometer offers a truly independent
measurement of the irradiance.
PV system performance monitoring: compliant with IEC 61724-1, Class C
IEC 61724-1: Photovoltaic System Performance Monitoring - Guidelines for Measurement,
Data Exchange and Analysis – suggests to use pyranometers for PV monitoring; SR05
complies with IEC 61724-1 class C system requirements.
Features and benefits of SR05-D1A3-PV
•higher stability than PV reference cells
•independent of PV cell type
•affordable calibration
•register structure and content identical to most common reference cells for easy
exchangeability
•easy implementation and servicing
•easy mounting and levelling
•pricing: affordable second class pyranometers
Figure 0.2 Two SR05-D1A3-PV digital second class pyranometers, of which one
measuring in Plane of Array, replacing PV reference cells

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SR05-D1A3-PV design
SR05 pyranometers employ a thermopile sensor with black coated surface, one dome
and an anodised aluminium body with visible bubble level. Optionally the sensor can be
delivered with a unique ball levelling mechanism and tube mount or dedicated mounting
fixture, for easy installation. SR05-D1A3-PV has an industry standard digital output:
Modbus RTU over half-duplex RS-485, that allows multiple sensors to be installed on a
single network. In addition, SR05-D1A3-PV has analogue 0 to 1 V output.
Figure 0.3 On the left SR05-D1A3-PV pyranometer with bubble level and M12-A cable
connector in its standard configuration (3 metre cable standard included); on the right
SR05 with optional ball levelling, for easy mounting and levelling on (non-)horizontal
surfaces (included mounting bolts not displayed)
Figure 0.4 SR05-D1A3-PV digital second class pyranometer with optional ball levelling
and tube mount for easy mounting and levelling on a tube (tube not included)

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Communication with a PC: Hukseflux Sensor Manager Software
For communication between a PC and SR05-D1A3-PV(‘s), the Hukseflux Sensor Manager
software can be used. It is available for download on our website. The software allows
the user to quickly configure SR05-D1A3-PV Modbus address and serial communication
settings (baud rate, parity and stopbits) and to plot and export data. Also, the digital
outputs may be viewed for sensor diagnostics.
Figure 0.5 User interface of the Hukseflux Sensor Manager
Compatibility
SR05-D1A3-PV’s Modbus interface is exchangeable with IMT-Solar Si-RS485TC-T-MB PV
reference cell’s interface. Other reference cells upon request.
Suggested use for SR05-D1A3-PV
•replacement of PV reference cells
•measuring global tilted irradiance (GTI) in the Plane of Array (PoA) of solar panels
•measuring global horizontal irradiance (GHI)
SR05-D1A3-PV is suited for use in SCADA (Supervisory Control And Data Acquisition)
systems, supporting Modbus RTU (Remote Terminal Unit) protocol over RS-485. In these
networks the sensor operates as a slave. Using SR05-D1A3-PV in a network is easy.
Once it has the correct Modbus address and communication settings and is connected to
a power supply, the instrument can be used in RS-485 networks. A typical network will
request the irradiance (either register 0x0000 or registers 0x1002 + 0x1003) and
temperature data (either register 0x0007 or register 0x1006) every 1 second, and
eventually store the averages every 60 seconds. How to issue a request, process the
register content and convert it to useful data is described in the paragraphs about
network communication. The user should have sound knowledge of the Modbus
communication protocol when installing sensors in a network. When using the analogue
0 to 1 V output provided by SR05-D1A3-PV, the instrument can be connected directly to
commonly used datalogging systems capable of handling a 0 to 1 V signal.

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The recommended calibration interval of pyranometers is 2 years. The registers
containing the applied sensitivity and the calibration history of the digital versions of
SR05 are accessible for users with a password. This allows the user to choose his own
local calibration service. The same register access may also be used for remotely
controlled re-calibration of pyranometers in the field. Ask Hukseflux for information on
this feature and on ISO and ASTM standardised procedures for field calibration.
The ASTM E2848 “Standard Test Method for Reporting Photovoltaic Non-Concentrator
System Performance” (issued end 2011) confirms that a pyranometer is the preferred
instrument for PV system performance monitoring. SR05 pyranometer complies with the
requirements of this standard. For more information, see our pyranometer selection
guide.
WMO has approved the “pyranometric method” to calculate sunshine duration from
pyranometer measurements in WMO-No. 8, Guide to Meteorological Instruments and
Methods of Observation. This implies that SR05 may be used, in combination with
appropriate software, to estimate sunshine duration. This is much more cost-effective
than using a dedicated sunshine duration sensor. Ask for our application note.
All SR05 versions should be used in accordance with the recommended practices of ISO,
WMO and ASTM.
See also
•view our complete range of sensors
•PMF01 pyranometer mounting fixture, compatible with SR05 ball levelling

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1Ordering and checking at delivery
1.1 Ordering SR05-D1A3-PV
SR05-D1A3-PV second class pyranometer has a digital output that is identical to the
most commonly used photovoltaic reference cell with Modbus over RS-485 output.
Besides SR05-D1A3-PV, SR05 series offers several other versions with industry standard
outputs, both digital and analogue. Each version offers multiple mounting options and
various cable lengths:
•SR05-D1A3 digital second class sensor, with Modbus over RS-485 and 0-1 V output1
•SR05-D2A2 digital second class sensor, with Modbus over TTL and 4-20 mA output
•SR05-A1 analogue second class pyranometer with millivolt output
1This is our standard Modbus model which is not directly exchangeable with the commonly used PV reference cells.
For an overview of all versions and options, and how to order, please take a look at Table
1.1.1 on the next page.
The standard configuration of SR05-D1A3-PV is with 3 metres cable length.
Common options for SR05-D1A3-PV are:
•longer cable (10, 20 metres). Specify total cable length
•extension cable with connector pair (10, 20 metres). Specify total cable length
•with ball levelling (-BL)
•with ball levelling and tube mount (for tube diameters 25 to 40 mm, -TMBL)
Ball levelling and tube mount are suited for retrofitting.
SR05-D1A3-PV’s Modbus interface is exchangeable with IMT-Solar Si-RS485TC-T-MB PV
reference cell’s interface. Other reference cells upon request.

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Table 1.1.1 Ordering codes for the versions of model SR05
VERSIONS OF SR05 (part numbers), without cable
SR05-D1A3-PV digital second class pyranometer, with Modbus over
RS-485 output, alternative for PV reference cell
SR05-D1A3-PV-BL digital second class pyranometer, with Modbus over
RS-485 output, alternative for PV reference cell, with ball
levelling
SR05-D1A3-PV-TMBL digital second class pyranometer, with Modbus over
RS-485 output, alternative for PV reference cell, with tube
mount on ball levelling
SR05-D1A3 digital second class pyranometer, with Modbus over
RS-485 and 0-1 V output
SR05-D1A3-BL
digital second class pyranometer, with Modbus over
RS-485 and 0-1 V output, with ball levelling
SR05-D1A3-TMBL
digital second class pyranometer, with Modbus over
RS-485 and 0-1 V output, with tube mount on ball
levelling
SR05-D2A2
digital second class pyranometer, with Modbus over TTL
and 4-20 mA output
SR05-D2A2-BL digital second class pyranometer, with Modbus over TTL
and 4-20 mA output, with ball levelling
SR05-D2A2-TMBL digital second class pyranometer, with Modbus over TTL
and 4-20 mA output, with tube mount on ball levelling
SR05-A1 analogue second class pyranometer, with millivolt output
SR05-A1-BL analogue second class pyranometer, with millivolt output,
with ball levelling
SR05-A1-TMBL
analogue second class pyranometer, with millivolt output,
with tube mount on ball levelling
CABLE FOR SR05, with female M12-A connector at sensor end, non-stripped on other end
‘-03’ after SR05 part number
standard cable length: 3 m
‘-10’ after SR05 part number
cable length: 10 m
‘-20’ after SR05 part number
cable length: 20 m
CABLE EXTENSION FOR SR05, with male and female M12-A connectors
C06E-10
cable length: 10 m
C06E-20
cable length: 20 m
An extension cable (with connector pair) can be used in combination with a regular cable
(with one connector at sensor end) to make alternative SR05 cable lengths possible.
Example: Cable length needed: 15 m. In this case, it is easiest to buy SR05 with a 20 m
cable and to cut it to desired length.
Example: Cable length needed: 30 m. In this case, it is easiest to buy SR05 with 10 m
cable and a cable extension of 20 m.

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1.2 Included items
Arriving at the customer, the delivery should include:
•pyranometer SR05-D1A3-PV
•cable of the length as ordered
•product certificate matching the instrument serial number
For SR05-D1A3-PV-BL, also
•ball levelling
•4 mm hex key
•1 x shim
•2 x M5x20 bolts
•2 x M5 nuts
For SR05-D1A3-PV-TMBL, also
•ball levelling
•4 mm hex key
•1 x shim
•2 x M5x20 bolts
•2 x M5 nuts
•tube mount
•2 x M5x30 bolts
•2 x M5x40 bolts
Please store the certificate in a safe place.
The Hukseflux Sensor Manager can be downloaded via www.hukseflux.com/downloads
SR05-D1A3-PV SR05-D1A3-PV-BL SR05-D1A3-PV-TMBL
Figure 1.2.1 From left to right: SR05-D1A3-PV, SR05-D1A3-PV-BL and SR05-D1A3-PV-
TMBL (nuts and bolts, tools and certificates are not shown, tube itself is not included)

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1.3 Quick instrument check
A quick test of the instrument can be done by connecting it to a PC and installing the
Sensor Manager software. See the chapters on installation and PC communication for
directions.
1. At power–up the signal may have a temporary output level different from zero; an
offset. Let this offset settle down.
2. Check if the sensor reacts to light: expose the sensor to a strong light source, for
instance a 100 W light bulb at 0.1 m distance. The signal should read > 100 W/m2now.
Darken the sensor either by putting something over it or switching off the light. The
instrument irradiance output should go down and within one minute approach 0 W/m2.
3. Inspect the bubble level.
4. Inspect the instrument for any damage.
5. Check the instrument serial number as indicated by the software against the label on
the instrument and against the certificates provided with the instrument.

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2Instrument principle and theory
Figure 2.1 Overview of SR05:
shaded areas in exploded view show ball levelling mount and shim
(1) cable (standard length 3 metres, optional longer cable)
(2) connector
(3) bubble level
(4) thermal sensor with black coating
(5) glass dome
(6) sensor body
(7) tube mount (optional)
(8) mounting screw (included with ball levelling and tube mount; requires 4 mm hex key)
(9) shim (included with and needed for ball levelling mount)
(10) ball levelling mount (optional)
(11) countersunk set screw for levelling adjustment (included with ball levelling mount;
requires 4 mm hex key)
(12) opening for Ø 25 to Ø 40 mm tube when using ball levelling and tube mount
1
2
3
45
6
7
8
10
11 9
12

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SR05’s scientific name is pyranometer. A pyranometer measures the solar radiation
received by a plane surface from a 180 ° field of view angle. This quantity, expressed in
W/m2, is called “hemispherical” solar radiation. The solar radiation spectrum extends
roughly from 285 to 3000 x 10-9 m. By definition a pyranometer should cover that
spectral range with a spectral selectivity that is as “flat” as possible.
In an irradiance measurement by definition the response to “beam” radiation varies with
the cosine of the angle of incidence; i.e. it should have full response when the solar
radiation hits the sensor perpendicularly (normal to the surface, sun at zenith, 0 ° angle
of incidence), zero response when the sun is at the horizon (90 ° angle of incidence, 90 °
zenith angle), and 50 % of full response at 60 ° angle of incidence.
A pyranometer should have a so-called “directional response” (older documents mention
“cosine response”) that is as close as possible to the ideal cosine characteristic.
In order to attain the proper directional and spectral characteristics, a pyranometer’s
main components are:
•a thermal sensor with black coating. It has a flat spectrum covering the 200 to 50000
x 10-9 m range, and has a near-perfect directional response. The coating absorbs all
solar radiation and, at the moment of absorption, converts it to heat. The heat flows
through the sensor to the sensor body. The thermopile sensor generates a voltage
output signal that is proportional to the solar irradiance.
•a glass dome. This dome limits the spectral range from 285 to 3000 x 10-9 m (cutting
off the part above 3000 x 10-9 m), while preserving the 180 ° field of view angle.
Another function of the dome is that it shields the thermopile sensor from the
environment (convection, rain).
•The digital versions of model SR05 have a high-end 24-bit A/D converter, which is
used by SR05 to convert the analogue thermopile voltage to a digital signal. SR05-
D1A3-PV has a digital output that is identical to the most commonly used
photovoltaic reference cell with Modbus over RS-485 output for easy exchangeability.
Pyranometers can be manufactured to different specifications and with different levels of
verification and characterisation during production. The ISO 9060 - 1990 standard, “Solar
energy - specification and classification of instruments for measuring hemispherical solar
and direct solar radiation”, distinguishes between 3 classes; secondary standard (highest
accuracy), first class (second highest accuracy) and second class (third highest
accuracy).
From second class to first class and from first class to secondary standard, the achievable
accuracy improves by a factor 2.

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Figure 2.2 Spectral response of the pyranometer compared to the solar spectrum. The
pyranometer only cuts off a negligible part of the total solar spectrum.
0
0,2
0,4
0,6
0,8
1
1,2
100 1000 10000
relative spectral content /
response [arbitrary units]
wavelength [x 10-9 m]
solar radiation
pyranometer
response

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3Specifications of SR05-D1A3-PV
3.1 Specifications of SR05-D1A3-PV
SR05 pyranometers measure the solar radiation received by a plane surface from a 180 °
field of view angle. This quantity, expressed in W/m2, is called “hemispherical” solar
radiation.
SR05-D1A3-PV offers irradiance in W/m2as a digital output and as a 0-1 V output. It
must be used in combination with suitable power supply and a data acquisition system
which uses the Modbus communication protocol over RS-485 or one that is capable of
handling a 0-1 V signal.
This user manual covers use of SR05-D1A3-PV. Specifications of this version
differ from those of the other digital and analogue sensors in the SR05 series
range. For use of SR05-D1A3 or SR05-D2A2, consult the separate SR05-D1A3 &
SR05-D2A2 user manual. For use of SR05-A1, offering analogue millivolt output,
consult the separate SR05-A1 user manual.
The instrument is classified according to ISO 9060 and should be used in accordance with
the recommended practices of ISO, IEC, WMO and ASTM.
Table 3.1.1 Specifications of SR05-D1A3-PV (continued on next pages)
SR05-D1A3-PV MEASUREMENT SPECIFICATIONS:
LIST OF CLASSIFICATION CRITERIA OF ISO 9060*
ISO classification (ISO 9060: 1990)
second class pyranometer
WMO performance level (WMO-No. 8,
seventh edition 2008)
moderate quality pyranometer
Response time (95 %)
18 s
Zero offset a (response to 200 W/m2
net thermal radiation)
< 15 W/m2 unventilated
Zero offset b (response to 5 K/h
change in ambient temperature)
< ± 4 W/m
2
Non-stability
< ± 1 % change per year
Non-linearity
< ± 1 % (100 to 1000 W/m2)
Directional response
< ± 25 W/m2
Spectral selectivity
< ± 5 % (0.35 to 1.5 x 10-6 m)
Temperature response < ± 3 % (-10 to +40 °C)
Tilt response
< ± 2 % (0 to 90 ° at 1000 W/m2)
*For the exact definition of pyranometer ISO 9060 specifications see the appendix.

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Table 3.1.1 Specifications of SR05-D1A3-PV (continued)
SR05-D1A3-PV ADDITIONAL SPECIFICATIONS
Measurand global irradiance
(hemispherical solar radiation)
Measurand in SI radiometry units
irradiance in W/m2
Optional measurand
sunshine duration
Field of view angle
180 °
Measurement range
0 to 2000 W/m2
Spectral range
(20 % transmission points)
285 to 3000 x 10
-9
m
Rated operating temperature range
-40 to +80 °C
Output definition running average over 4 last measurements,
measurement every 0.1 s
Recommended data request interval
1 s, storing 60 s averages
Measurement function / optional
programming for sunshine duration
programming according to WMO guide paragraph
8.2.2
Measurand
instrument body temperature
Temperature sensor
Solid state System on Chip (SoC) silicon bandgap
temperature sensor
measurand in SI units
temperature in °C
Standard governing use of the
instrument
ISO/TR 9901:1990 Solar energy -- Field pyranometers
-- Recommended practice for use
ASTM G183 - 05 Standard Practice for Field Use of
Pyranometers, Pyrheliometers and UV Radiometers
Standard cable length (see options)
3 m
Cable diameter
4.8 x 10-3 m
Cable conductor cross-section
0.25 x 10-6 m2(24 AWG)
Chassis connector
M12-A straight male connector, male thread, 5-pole
Cable connector
M12-A straight female connector, female thread, 5-
pole
Connector protection class
IP67
Cable replacement
replacement and extension cables with connector(s)
can be ordered separately from Hukseflux
Mounting (see options)
2 x M5 bolt at 46 mm centre-to-centre distance on
north-south axis, requires 4 mm hex key
Levelling (see options)
bubble level is included
Levelling accuracy
< 0.6 ° bubble entirely in ring
Desiccant
silica gel, 1.0 g, in a HDPE bag, (25 x 45) mm
IP protection class
IP67
Gross weight including 3 m cable
0.45 kg excluding optional accessories
Net weight including 3 m cable
0.35 kg excluding optional accessories
Packaging
box of (170 x 100 x 80) mm
CALIBRATION
Calibration traceability
to WRR
Calibration hierarchy from WRR through ISO 9846 and ISO 9847, applying
a correction to reference conditions
Calibration method
indoor calibration according to ISO 9847, Type IIc
Calibration uncertainty
< 1.8 % (k = 2)
Recommended recalibration interval
2 years
Reference conditions
20 °C, normal incidence solar radiation, horizontal
mounting, irradiance level 1000 W/m
2
Validity of calibration
based on experience the instrument sensitivity will not change during storage. During use under exposure to
solar radiation the instrument “non-stability”
specification is applicable.
.

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Table 3.1.1 Specifications of SR05-D1A3-PV (started on previous pages)
MEASUREMENT ACCURACY AND RESOLUTION
Uncertainty of the measurement statements about the overall measurement
uncertainty can only be made on an individual basis.
see the chapter on uncertainty evaluation
WMO estimate on achievable accuracy
for daily sums (see appendix for a
definition of the measurement conditions)
10 %
WMO estimate on achievable accuracy
for hourly sums (see appendix for a
definition of the measurement conditions)
20 %
Irradiance resolution 0.1 W/m
2
(register address 0x0000)
0.01 W/m
2
(register address 0x1002 + 0x1003)
Instrument body temperature resolution 0.1 °C (register address 0x0007)
0.01 °C (register address 0x1006)
Instrument body temperature accuracy
± 0.5 °C
SR05-D1A3-PV
Rated operating voltage range
5 to 30 VDC
Recommended operating voltage
12 VDC
Power consumption
< 48 x 10-3 W at 12 VDC
SR05-D1A3-PV: DIGITAL
Digital output irradiance in W/m
2
instrument body temperature in °C
Communication protocol
Modbus over 2-wire RS-485
Transmission mode
RTU
RS-485 transceiver common mode range
-7 to +12 V
RS-485 transceiver type
2-wire, non-isolated
System requirements for use with PC Windows 7 and later, USB or RS-232 (COM) port and
connector, RS-485 / USB converter or RS-485 / RS-
232 converter
Software requirements for use with PC
Java Runtime Environment 8 – latest version available
free of charge at http://www.java.com, Hukseflux
Sensor Manager - software version v1817 or higher
User interface on PC Hukseflux Sensor Manager v1817 or higher software
downloadable: to download and for available software
updates, see
http://www.hukseflux.com/page/downloads
SR05-D1A3-PV: ANALOGUE 0 TO 1 V
0 to 1 V output
irradiance in W/m2
Transmitted range
0 to 1600 W/m2
Output signal
0 to 1 V
Standard setting (see options) 0 V at 0 W/m
2
and
1 V at 1600 W/m
2
OPTIONS
Longer cable: 10,20 m
Cable with M12-A female connector on
sensor end, non-stripped on other end
option code = total cable length
Extension cable with connector pair:
10, 20 m. Cable with male and female
M12-A connectors
option code = C06E-10 for 10 metres, C06E-20 for
20 metres