Kipp & Zonen SUV5 User manual

SUV5 • Smart UV Radiometer
Instruction Manual

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Dear customer, thank you for purchasing a Kipp & Zonen instrument. It is essential that you read this manual completely for a
full understanding of the proper and safe installation, use, maintenance and operation of your new SUV5 series radiometer.
We understand that no instruction manual is perfect, so should you have any comments regarding this manual we will be pleased
to receive them at:
Kipp & Zonen B.V.
Delftechpark 36, 2628 XH Delft, - or
P.O. Box 507, 2600 AM Delft,
The Netherlands
[phone]
[e-mail]
www.kippzonen.com
Warranty and liability
Kipp & Zonen guarantees that the product delivered has been thoroughly tested to ensure that it meets its published specifications.
The warranty included in the conditions of delivery is valid only if the product has been installed and used according to the
instructions supplied by Kipp & Zonen.
Kipp & Zonen shall in no event be liable for incidental or consequential damages, including without limitation, lost profits, loss
of income, loss of business opportunities, loss of use and other related exposures, however incurred, rising from the faulty and
incorrect use of the product.
Modifications made by the user may affect the instrument performance, void the warranty, or affect the validity of the CE declaration
or other approvals and compliances to applicable International Standards.
Copyright © 2017 Kipp & Zonen B.V.
All rights are reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or
by any means, without authorisation by Kipp & Zonen.
Kipp & Zonen reserves the right to make changes to this manual, brochures, specifications and other product documentation
without prior notice.
Manual document number: V1702
Publication date: 1st February 2017
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Important user information

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This Declaration of Conformity is compliant with the European Standard EN 45014 General Criteria for supplier’s Declaration of Conformity. The basis for the criteria has been found
in international documentation, particularly in ISO/IEC, Guide 22, 1982, Information on manufacturer’s Declaration of Conformity with standards or other technical specifications
Declaration of Conformity
Kipp & Zonen B.V.
Delftechpark 36, 2628 XH Delft
P.O. Box 507, 2600 AM Delft
The Netherlands
declares under our sole responsibility that the product
SUV5 Smart UV Radiometer
to which this declaration relates, is in conformity with European Harmonised Standards
as published in the Official Journal of the EC, based on the following standard
following the provisions
also, this device complies to
Del, 7 February 2017
E. Valks - CEO
Kipp & Zonen B.V.
[EMC - FCC] Title 47CFR part 15
[EMC - Emissions]
[EMC - Immunity]
[Environmental Aairs]
EN 61326-2-3:2013
EN 61326-2-3:2013
EN 50581:2012
EMC-directive
RoHS Directive
2014/30/EC
2011/65/EC

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Important User Information
Declaration of Conformity
1 Introduction
1.1.1 The SUV5 broad-band UV Radiation
1.1.2 Spectral response of SUV5 radiometer
1.2 Key parts of the SUV5 radiometer
2 Installation
2.1 Included with the product
2.2 Tools required
2.3 Location and support
2.4 Installation for measurement on a horizontal plane
2.4.1 Location
2.4.2 Mounting
2.4.3 Orientation
2.4.4 Levelling
2.4.5 Securing
2.4.6 Fitting the connector and cable
2.4.7 Fitting the sun shield
2.5 Electrical connections
2.5.1 Power connection
2.5.2 Data connection
2.5.3 Analogue voltage output
2.5.4 Analogue current output
2.9.5 Recommended cable types
3 Accessories
3.1 Ventilation
3.2 Mountings
3.3 Cables
4 SmartExplorer software and Modbus® communication
5 Operation and measurement
5.1 Data collection
5.2 Key parts of the SUV5 radiometer
5.2.1 Dome
5.2.2 Detector
5.2.3 Housing
5.2.4 Drying cartridge
5.2.5 Cable and connector
6 Maintenance and recalibration
6.1 Daily maintenance
6.2 Monthly maintenance
6.3 Yearly maintenance
6.4 Calibration
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Table of Contents

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7 Specifications
7.1 Optical and electrical
7.2 Dimensions and weight
8 Trouble shooting
8.1 Output signal not present or incorrect
8.2 Frequently Asked Questions
9 Customer support
Appendices
A. Modbus®
A.1 Modbus® commands
A.2 Input registers
A.3 Holding registers
A.4 Read input register
A.5 Discrete inputs
A.6 Coils
A.7 Read write holding registers
A.8 Read discrete inputs
A.9 Read write discrete coils
A.10 Requesting serial number
A.11 Simple demonstration program
B. Radiometer physical properties
B.1 Spectral range
B.2 Sensitivity
B.3 Response time
B.4 Non-linearity
B.5 Tempearture dependence
B.6 Tilt error
B.7 Operating temperature
B.8 Field of view
B.9 Directional response
B.10 Maximum irradiance
B.11 Non-stability
B.12 Environmental
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Using this table
Click on any item in the table of contents to be taken directly to the relevant page.
Click on the bottom of any page to be taken back to the table of contents.

Throughout this manual the following symbols are used to indicate to the user important information.
General warning about conditions, other than those caused by high voltage electricity, which may result in physical
injury and/or damage to the equipment or cause the equipment to not operate correctly.
Note Useful information for the user
1.1 Product overview
The UV radiometer type SUV5 is designed to measure broadband global UV irradiance. The instrument has a sensitivity covering
the entire UV range, UVA and UVB. The radiometer is designed for continuous outdoor use in routine monitoring applications
with the sun as a source. It can also be used in indoor applications, bearing the specifications of the source (generally a lamp)
and of the radiometer in mind.
SUV5 radiometer features internal digital signal processing and interface optimised for industrial data acquisition and control
systems. Kipp & Zonen has developed a smart interface that features RS-485 Modbus® data communication for connection to
programmable logic controllers (PLC’s), inverters, digital control equipment and the latest generation of data loggers. Amplified
Voltage or Current outputs are also included for devices that have high-level analogue inputs or current loop interfaces.
The SUV5 is available in two versions. One has an analogue voltage output of 0 to 1 V, the other has an analogue current output
of 4 to 20 mA. They both have a 2-wire RS-485 interface with Modbus® (RTU) protocol.
Digital signal processing and an integrated temperature sensor, corrects for the temperature dependence of the detector sensitivity.
This manual, together with the SmartExplorer manual and instruction sheet, provides information related to the installation,
maintenance, calibration, product specifications and applications of the SUV5 UV Radiometer.
If any questions should remain, please contact your local Kipp & Zonen representative or e-mail the Kipp & Zonen customer and
product support department at: suppor[email protected]
Please go to www.kippzonen.com for information about other Kipp & Zonen products, or to check for any updates to this manual
or software.
1.1.1 The SUV5 broad-band UV Radiation
The SUV5 radiometer can measure UV-radiation of extended spectra of radiation as from solar radiation and incandescent lamps.
Customer must be aware that: a feature of broadband radiometry is that very different spectra can yield the same integrated
irradiances in the bandwidth of the radiometer as long as the spectral response curve of the latter is rectangular (ideal). The
bandwidth of a radiometer with a non-rectangular shape of the spectral response is determined by its half power wavelengths.
For the SUV5 radiometer the nominal pass band so becomes 315 to 378 nm (the overall spectral range is 280 to 400 nm). In
principle the SUV5 radiometer measures global irradiance within this wavelength interval.
Due to the non-rectangular spectral response curve of the SUV5, it will not weigh UV radiation of different wavelength equally in
this band. Different spectra with the same irradiance in the SUV5 passband will give different output voltages and consequently
each spectra needs its own sensitivity figure (µV/W/m²).
1. Introduction
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1.1.2 Spectral response of SUV5 radiometer
The accuracy of the SUV5 radiometers is mainly determined by the properties of the band pass filter. The figure below shows the
spectral response of a SUV5 on a logarithmic scale. A linear plot of the SUV5 relative spectral response attached to the calibration
certificate.
SUV5 relative spectral response (relative units).
By definition global radiation G is the downward irradiance, both direct and diffuse, on a horizontal surface. In other words, G
represents the downward vertical component of the radiation field. Especially the accurate measurement of the vertical component
of the direct radiationrequires a detector with a so-called cosine response. In pyranometers with thermal detectors a good cosine
response is reached with flat black absorber paint and proper domes. For measurement of weak UV-signals in small wavelength -
intervals photoelectric detectors are more attractive. However photodiodes and the interference filter needed cannot accept
radiation with large incidence angles. A diffuser is necessary which accepts radiation from at least a full angle of 170°. The
dimensions of the diffuser ensure a good cosine response but due to tolerances in diffuser and protecting dome each UV radiometer
has its own individual directional response. To ensure that the response at 90° incidence angle is zero (cos. 90° = 0) a shadow of
a rim shades off the diffuser side for angles >85°.
10
280
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
300
Wavelength [nm]
Normalized Spectral Response
320 340 360 380 400

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The diagram is only given as qualitative information. The diffuse radiation undergoes the same cosine errors but of course
‘weighted’ over all zenith and azimuth angles. From some parts of the sky strongly polarized diffuse radiation is received.
However the diffuser depolarizes this radiation.
Cosine error versus azimuth of SUV5 REF 1 at different sun's zenith (cable pointing North)
To achieve the required spectral and directional characteristics SUV5 radiometer use a photo-diode detector filter and glass
dome. It has a built-in bubble levels and adjustable levelling feet. Snap-on sun shields reduce solar heating of the housings. The
waterproof connectors have gold-plated contacts.
The SUV5 can be delivered with a waterproof plug pre-wired to a high quality signal cable, typically this is 10 m long but other
lengths are available. The instruments can also be ordered without a cable or with a plug only, for the user to fit their own cable.
The SUV5 has an internal desiccant that is guaranteed for 10 years.
-4
-3
-2
-1
0
1
2
3
4
5
6
Cosine error [%]
Azimuth
45°90°135°180°225°270°315°360°
40°
60°
70°
80°
=
=
=
=
0° NE East SE South SW West NW NorthNorth

1.2 Key parts of the SUV5 radiometer
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glass dome
housing
diffusor
sun shield bubble level
connector
detector
fixed foot adjustable feet
desiccant

Please follow the instructions in this section carefully for the mechanical and electrical installation of the SUV5 series radiometers.
Do not turn on power to the instrument until instructed to do so.
Note Do not connect the instrument to a computer until instructed to do so.
Note Do not turn on power to the operating computer until instructed to do so.
2.1 Included with the product
Check the contents of the shipment for completeness (see below) and note whether any damage has occurred during transport. If
there is damage, a claim should be filed with the carrier immediately. In the case of damage and/or the contents are incomplete,
contact your local Kipp & Zonen representative or e-mail the Kipp & Zonen customer and product support department at:
[email protected]
Although the SUV5 radiometers are weather-proof and suitable for use in harsh environmental conditions, they have some
delicate mechanical parts. Please keep the original packaging for safe transport of the radiometer to the measurement site, or
for use when returning the radiometer for calibration.
The following items are included with SUV5 radiometers:
Smart UV Radiometer
Sun screen
Optional cable, pre-wired with 8-pins connector or connector only for customer cable
Calibration certificate
Instruction sheet
Radiometer fixing kit; 2 each of stainless steel M5 x 80 mm screw, nut, flat washer, nylon insulation ring
2.2 Tools required
The tools required to fi an SUV5 radioometer to a support are a 4 mm (M5 socket head screw) Allen key and a 8 mm (M5 nut)
wrench / spanner.
2.3 Location and support
The instruction sheets contain all the outline information necessary for the correct installation of the radiometers. Further detail
for specific types of installation and application are given later in this section.
The SUV5 has an internal desiccant that is operational for 10 years after the last calibration date as mentioned on the instrument
label and calibration certificate.
2.4 Installation for measurement on a horizontal plane
The following steps must be carefully taken for optimal performance of the instrument.
2. Installation
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2x
2x
2x
2x
6
5
3
1
2
1
3
4
5
6
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2.4.1 Location
Ideally, the site for the radiometer should be free from any obstructions to the hemispherical view from the plane of the detector.
If this is not possible, the site should be chosen in such a way that any obstruction over the azimuth range between earliest
sunrise and latest sunset should have an elevation not exceeding 5° (the apparent sun diameter is 0.5°).
It is evident that the radiometer should be located in such a way that a shadow will not be cast upon it at any time (for example
by masts or ventilation ducts). Note that hot exhaust gas (> 100°C) will produce some radiation in the spectral range of the
radiometer and cause an offset in the measurements. The radiometer should be distant from light-coloured walls or other
objects likely to reflect sunlight onto it, or emitting short-wave radiation.
The radiometer should be readily accessible for cleaning the outer dome, checking that it is level and inspecting the desiccant.
2.4.2 Mounting
The SUV5 radiometer is provided with two holes for 5 mm bolts. Two nylon insulation rings and two each of stainless steel bolts,
washers and nuts are provided in the fixing kit. The radiometer should first be secured lightly with the bolts to a solid and stable
mounting stand or platform as shown below. The nylon insulators are important to prevent corrosion between the screws and
the radiometer housing.
Ensure that there is a good electrical contact with the ground to conduct away currents in the cable shield induced by lightning.
Note After recalibration and/or reinstallation ensure that the nylon insulators are refitted.
2.4.3 Orientation
In principle no special orientation of the instrument is required, although the World Meteorological Organisation (WMO) recommends
that the signal lead (connector) is pointed towards the nearest pole, to minimise heating of the electrical connections. This is also
where any mounting pole, or other support, should be located in order that shadows do not fall on the instrument.
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h
>10 x h
Ø 5.2 mm (2x)
65 mm
M5 x 80 mm screw (2x)
Nylon insulation rings (2x)
Nut (2x)
Flat washer (2x)

2.4.4 Levelling
Accurate measurement requires proper levelling of the detector surface. Level the instrument by turning the two adjustable feet
to bring the bubble of the spirit level centrally within the marked ring.
Note It is ideal that the bubble should be completely within the marked ring. However, in fact, the radiometer is level
within the specified accuracy when the bubble is at least half within the ring.
2.4.5 Securing
Secure the radiometer tightly with the two stainless steel bolts. Use the two nylon insulators to avoid contact between the
aluminium body and the steel screws. Ensure that the radiometer maintains the correct levelled position when it is tightened.
.
2.4.6 Fitting the connector and cable
Locate the plug correctly in the radiometer socket, it only fits one way, and push it in. Screw the plug locking ring hand-tight.
Over-tightening may damage the waterproof seal. Secure the cable so that it cannot blow in the wind or cause a shadow on the
instrument.
Note The cable should be arranged with a curve below the instrument so that water drips off, rather than running along
the cable up to the connector.
2.4.7 Fitting the sun shield
Finally, clip on the sun shield to prevent excessive heating of the radiometer body. The bubble level is visible through the top
of the sun shield for routine checks and the shield ‘tail’ helps to protect the connector.
2.5 Electrical connections
The SUV5 radiometers uses an 8-wire cable with pre-wired waterproof connector. Cables are available at different lenghts.
The colour code of the wires and the connector pin numbers are shown below and on the instruction sheet.
Special attention is needed to prevent power or ground loops when connecting the SUV5 to multiple readout devices.
Connecting the RS-485 to a grounded circuit and the analogue output to a floating circuit can cause unacceptable
ground loops. This may cause differential voltages outside the SUV5 specifications and will damage the unit. We
recommend using either the analogue or the digital output but not both. The maximum differential between either
of the Modbus® RS-485 lines (yellow and grey) and the power ground / RS-485 common line (black) is 70 VDC.
Radiometer Connection
Wire Function Connect with
Red
Blue
HousingShield
Not connectedNone
Modbus® common / Ground
Analogue out V+/4-20 mA(+)
Analogue ground V
- /4-20 mA( - )
Modbus® RS-485
Modbus® RS-485
Power 5 to 30 VDC (12 V recommended)
Power ground / RS-485 Common
Ground *
White
Black
Yellow
Brown
Green
Grey
5
1
2
8
7
* Connect to ground if radiometer not grounded
4
6
3
15
SUV5-V or SUV5-A
5 to 30 VDC
power supply
Modbus® RS-485
V / mA
0.0
0.2
0.4
0.6
0.8
1.0

First connect all wires before plugging into the radiometer
The shield of the cable is connected to the aluminium radiometer housing through the connector body. Preferably,
secure the radiometer with its levelling screws on a metal support with a good connection to ground (e.g. by using
a lightning conductor) and do not connect the cable shield at the readout end.
If there is no good ground connection at the radiometer, the shield at the cable end should be connected to ground
at the readout equipment. Lightning can induce high voltages in the shield but these will be led off at the radiometer
or readout equipment.
Note Long cables may be used, but the cable resistance must be smaller than 0.1% of the impedance of the readout
equipment for the analogue outputs and may affect the baud rate of the RS-485 digital connection.
2.5.1 Power connection
The minimum power supply voltage for SUV5 radiometers is 5 VDC. However, for optimal performance it is advised to use 12VDC,
especially when long cables are used. 5-volt power can only be used in combination with a short cable, maximum 10m.
It is advised to protect the output of the power supply with a fast blowing fuse of maximum 250 mA rating.
Typical power consumption SUV5-V for maximum output (1 V)
5 VDC 50 mW (approx. 10.0 mA)
12 VDC 55 mW (approx. 4.5 mA)
24 VDC 60 mW (approx. 2.5 mA)
.
Maximum power consumption 65 mW at the highest input voltage.
Maximum input current 12.5 mA at the lowest input voltage.
Maximum inrush current 200 mA.
Typical power consumption SUV5-A for max output (20 mA)
5 VDC 77 mW (approx. 28 mA with 100 Ω load resistor)
12 VDC 83 mW (approx. 24 mA with 100 Ω load resistor)
24 VDC 100 mW (approx. 6 mA with 100 Ω load resistor)
The above mW values represent the dissipation within the SUV5-A. For the total power the energy in the load resistor has to
be added.
For supply voltages below 12 Volts or above 20 Volts it is advised to use a load resistor of less than 500 Ω to keep the power
consumption as low as possible.
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2.5.2 Data connection
Connection to a Personal Computer by Universal Serial Bus (USB)
The connection depends on the use of a RS-485 to USB converter.
The converter must have galvanic isolation between the inputs and outputs to prevent possible damage to the SUV5
digital interface. This is particularly an issue with portable computers (laptops, etc.) in which the power supplies
can generate large voltage spikes.
A suitable converter is the model USOPTL4 from B & B Electronics. One end has the USB connector to the PC the other end has
a connector with screw terminals for the instrument wires. This RS-485 converter is powered from the USB interface, so no
additional power adaptor is necessary.
*Note Switches on the converter should be set for RS-485, 2-wire operation and Echo off.
Connection to a RS-485 Network
The digital interface can be connected to a 2-wire RS-485 network as shown below.
Shield - ground connection
SUV5 connections to USB
USB to PC
Not connected
Analogue out +
Analogue out
-
Modbus® RS-485
Modbus® RS-485
Modbus® common / Ground
Power 5 to 30 VDC
Power ground / RS-485 common
+ V
- V
RS-485 / USB converter
Common *
Slave 1 Slave n
Master
Common
Balanced pair
LT LT
Pull down
Pull up
5 V
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The slaves may be a SUV5 radiometer or any other Modbus® devices. If a SUV5 radiometer is the last device on the network a
line terminator (LT), consisting of a 120 Ω or 150 Ω resistor, must be connected between terminals A/A'/- and B/B'/+. Never
place this line termination on the derivation cable. It is also required to install the pull up and pull down resistors as shown.
The value of these resistors must be between 650 Ω and 850 Ω.
2.5.3 Analogue voltage output
The SUV5-V (voltage output versions) have been factory set such that an output of 0 Volts represents -100 W/m² (this will never
be reached in practice), and the full-scale output of 1 Volt represents 400 W/m².
The voltage output range in W/m² can be changed by the user with the supplied PC software. The maximum recommended
irradiance for the SUV5 is 400 W/m².
The measurement range must start from a negative value because the analogue output itself cannot go to zero or go negative. For
the default setting of 0 to 1 Volt representing -100 to 400 W/m² the range is actually 500 W/m² with a zero offset of 100 W/m².
If the radiometer is used in atmospheric conditions it is advised to keep the range as factory set.
2.5.4 Analogue current output
The SUV5-A (current output versions) have been factory set such that an output of 4 mA represents 0 W/m² and the full-scale
output of 20 mA represents 400 W/m².
The current output range in W/m² can be changed by the user with the supplied PC software. The maximum recommended
irradiance for the SUV5 is 400 W/m².
2.9.5 Recommended cable types
Where cables need to be extended, or the customer prefers to provide their own cables, they should be suitable for outdoor used
and UV resistant.
Recommended types
RS-485 Ethernet CAT 5 shielded twisted pair (STP)
0 to 1 V Shielded 2-core signal cable
4 to 20 mA Shielded twisted pair control cable
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Below is a brief description of the accessories available for SUV5 radiometers. Detailed information can be found on our
website, where the brochures and manuals for these accessories can be viewed and downloaded.
3.1 Ventilation
To further improve measurement accuracy of the SUV5 radiometers the CVF4 ventilation unit can be used. CVF4 has a tacho
output to monitor the fan speed and 5 or 10 Watt heater. The advantages of a CVF4 are:
No precipitation or condensation on the dome
Less dirt on the dome
Frost, snow or ice can be melted
Less frequent cleaning required
3.2 Mountings
For mounting radiometers the following plates and brackets are available:
CMF1 mounting fixture with rod for mounting one unventilated SUV5
CMF4 mounting plate with rod for mounting one ventilated SUV5
CMB1 mounting bracket to fix and adjust a mounting rod to a mast, pole or wall
3.3 Cables
For the SUV5 different cable lengths are available with a pre-wired waterproof connector plug. Also a loose connector can be
ordered for you to fit to your own cable.
10 m cable with connector
25 m cable with connector
50 m cable with connector
Loose connector without cable
3. Accessories

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