Lufft NIRS31-UMB User manual

© G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany. Subject to change without notice.
48.7230-NIRS31E
Document version V8.2 (03/2017)

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 3
Contents
1Please Read Before Use.............................................................................................................................................5
1.1 Symbols Used .....................................................................................................................................................5
1.2 Safety Instructions...............................................................................................................................................5
1.3 Designated Use...................................................................................................................................................5
1.4 Incorrect Use.......................................................................................................................................................5
1.5 Guarantee............................................................................................................................................................5
1.6 Brand Names.......................................................................................................................................................5
2Scope of Delivery........................................................................................................................................................6
3Order Numbers............................................................................................................................................................7
3.1 Accessories.........................................................................................................................................................7
3.2 Spare Parts..........................................................................................................................................................7
3.3 Additional Documents and Software....................................................................................................................7
4Equipment Description...............................................................................................................................................8
4.1 Road Surface Temperature.................................................................................................................................8
4.2 Water Film Height................................................................................................................................................8
4.3 Ice Layer Thickness.............................................................................................................................................8
4.4 Road Condition....................................................................................................................................................8
4.5 Ice Percentage ....................................................................................................................................................8
4.6 Freezing Temperature.........................................................................................................................................8
4.7 Saline Concentration ...........................................................................................................................................9
4.8 Snow Height ........................................................................................................................................................9
4.9 Friction.................................................................................................................................................................9
4.10 Sensor Technology NIRS31-UMB.....................................................................................................................10
5Generation of Measurements...................................................................................................................................11
5.1 Current Measurement (act)................................................................................................................................11
6Operation Modes.......................................................................................................................................................11
6.1 Normal Operation..............................................................................................................................................11
6.2 Energy Saving Mode .........................................................................................................................................11
7Measurement Output ................................................................................................................................................12
7.1 Measurements...................................................................................................................................................12
7.2 Additional Sensor Information............................................................................................................................15
8Installation.................................................................................................................................................................17
8.1 Fastening...........................................................................................................................................................17
8.2 Aligning the Sensor............................................................................................................................................18
8.3 Selecting the Installation Location .....................................................................................................................19
9Connections ..............................................................................................................................................................22
9.1 Equipment Connector........................................................................................................................................22
9.2 Pin Assignment..................................................................................................................................................22
9.3 Supply Voltage ..................................................................................................................................................22
9.4 RS485 Interface.................................................................................................................................................22
9.5 Connection to ISOCON-UMB (8160.UISO).......................................................................................................23
9.6 Use of Surge Protection (8379.USP).................................................................................................................23
10 Commissioning.........................................................................................................................................................24
10.1 Conditions for the Initial Commissioning............................................................................................................24
10.2 Important Instructions for Commissioning..........................................................................................................24
11 Sensor Adjustment...................................................................................................................................................25
11.1 Readjustment using the UMB Config Tool.........................................................................................................25
11.2 Adjustment during Operation.............................................................................................................................25
12 Configuration and Testing........................................................................................................................................26
12.1 Factory Settings.................................................................................................................................................26
12.2 Configuration with the UMB Config Tool............................................................................................................26

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
4G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
12.3 Function Test with the UMB Config Tool........................................................................................................... 28
13 Firmware Update...................................................................................................................................................... 29
14 Maintenance.............................................................................................................................................................. 30
14.1 Replacing the Reflector Unit ............................................................................................................................. 30
14.2 Cleaning the Transmitter and Receiver Plates.................................................................................................. 31
14.3 Resetting the Service Level.............................................................................................................................. 32
14.4 Function Test.................................................................................................................................................... 32
14.5 Checking the Sensor Adjustment...................................................................................................................... 33
14.6 Generate Status File......................................................................................................................................... 33
15 Technical Data.......................................................................................................................................................... 34
15.1 Measurement Range / Accuracy....................................................................................................................... 35
15.2 Drawings........................................................................................................................................................... 36
16 Fault Description...................................................................................................................................................... 37
17 Disposal .................................................................................................................................................................... 38
17.1 Within the EC.................................................................................................................................................... 38
17.2 Outside the EC ................................................................................................................................................. 38
18 Repair / Corrective Maintenance............................................................................................................................. 38
18.1 Technical Support............................................................................................................................................. 38
19 Appendix................................................................................................................................................................... 39
19.1 Channel List Summary...................................................................................................................................... 39
19.2 Channel List Summary per TLS2002 FG3........................................................................................................ 40
19.3 Communication in Binary Protocol.................................................................................................................... 41
19.4 Communication in ASCII Protocol..................................................................................................................... 44
19.5 Communication in SDI-12 Mode....................................................................................................................... 46
20 List of Figures........................................................................................................................................................... 56
21 Index.......................................................................................................................................................................... 57

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 5
1 Please Read Before Use
Please read this Operating Manual carefully and keep it handy for future reference. Please
note that various components of the sensor and the described software may look somewhat
different from those shown in the illustrations in this operating manual.
This manual is valid for devices of the Lufft NIRS31-UMB with device version 21 or
higher (03/2013). Some functions or features specified in this manual may not be
available or may not be valid with older device versions. The device version is indicated
as the last number of the serial number printed on the type plate, e.g.: the device with
SN: 063.1010.0707.014 has the device version 14.
1.1 Symbols Used
Important information concerning potential hazards to the user
Important information concerning the correct operation of the equipment
1.2 Safety Instructions
Installation and commissioning must only be carried out by suitably qualified specialist
personnel.
Never take measurements on or touch live electrical parts.
Pay attention to the technical data and storage and operating conditions.
1.3 Designated Use
The equipment must only be operated within the range of the specified technical data.
The equipment must only be used under the conditions and for the purposes for which it
was designed.
The safety and operation of the equipment can no longer be guaranteed if it is modified or
adapted.
1.4 Incorrect Use
If the equipment is not correctly installed:
It may not function or its operation may be limited.
It may be permanently damaged.
Danger of injury may exist if the equipment is allowed to fall.
If the equipment is not correctly connected:
It may not function.
It may be permanently damaged.
The possibility of an electrical shock may exist under certain circumstances.
1.5 Guarantee
The guarantee period is 24 months from the date of delivery. The guarantee is forfeited if the
designated use is violated.
1.6 Brand Names
All brand names referred to are subject without limitation to the valid trademark and
ownership rights of the respective owner.

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
6G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
2 Scope of Delivery
The content of the delivery consists of the following components:
Sensor NIRS31-UMB
Mast clamp
Sounding pipe
Operating manual
Transport packaging
Note: The delivery does not include a connection cable; this must be ordered to the
required length (15 or 50 meters; see Accessories page 7).
Note: The sensor must always be transported in the original packaging, as otherwise it will
be damaged.

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 7
3 Order Numbers
NIRS31-UMB 8710.UT01
Non-invasive road sensor including integrated road surface temperature sensor
3.1 Accessories
15m connection cable including
connector
8371.UK015
50 m connection cable including
connector
8371.UK050
Power supply unit 24V/100VA
8366.USV1
ISOCON-UMB
8160.UISO
Surge protection
8379.USP
3.2 Spare Parts
Reflector unit
8710.ULAMP
3.3 Additional Documents and Software
You can download the following documents and software via the Internet at www.lufft.com.
Operating Manual
This document
UMB Config Tool
Windows®software for testing, firmware updates and
configuration of UMB devices
UMB Protocol
Communication protocol for UMB devices
Firmware
The current equipment firmware

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
8G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
4 Equipment Description
Depending on the requirements of the road traffic meteorological monitoring network,
sensors are installed in the roadways and / or "overhead". The Lufft NIRS31-UMB completes
the product range to include a non-invasive, intelligent sensor. The NIRS31-UMB provides
an alternative to the Lufft IRS31-UMB, especially for measuring points such as bridges,
which do not always allow direct installation of sensors in the roadway. In addition, at points
where asphalt repairs often take place, it is no longer necessary to remove the sensor
technology during repair works. The optical measuring device NIRS31-UMB for the detection
of water, ice and snow can be mounted on a bridge or mast. The measurement distance
between the measuring device and the road surface can be from 6 to 15 meters.
The sensor delivers established and commonly used decision-making data to winter
maintenance services, including water film height, road condition, road surface temperature
and freezing temperature. In addition, the sensor provides ice percentage and snow depth
readings. As the ice percentage on the road surface increases, the friction coefficient falls off
and this can be used as a guide in preventive road gritting decision-making.
In contrast to built-in road sensors, non-invasive sensors are not able to measure
underground soil temperature.
The equipment is connected by way of an 8 pole plug-in terminal and associated connection
cable (available in lengths of 15m and 50m).
The measured values can be requested over the RS485 interface in accordance with the
UMB protocol.
During commissioning, configuration and measurement polling takes place using the UMB
Config Tool (Windows®PC software).
4.1 Road Surface Temperature
Road surface temperature is measured by means of a non-invasive pyrometer, which is fully
integrated into the sensor.
4.2 Water Film Height
Measurement of the water film height on the road surface takes place by means of non-
invasive optical spectroscopy. The water film height is the proportion of liquid water.
4.3 Ice Layer Thickness
Measurement of the ice layer thickness on the road surface takes place by means of non-
invasive optical spectroscopy.
The ice layer thickness indicates the proportion of the frozen water as water
equivalent. The sum of water film height and ice layer thickness results the total water
equivalent.
4.4 Road Condition
The current road condition is determined from the measurement of water film height and
road surface temperature. The sensor calculates the following conditions: dry, damp, wet,
snow / ice and critical wetness.
4.5 Ice Percentage
The proportions of frozen solution are determined from the measurement data provided by
optical spectroscopy and transmitted as the ice percentage.
4.6 Freezing Temperature
The freezing temperature is determined on the basis of the current road surface temperature
and the measured ice percentages.
Note: The freezing temperature can only be determined if ice percentages have already
formed. Determination of freezing temperature is currently limited to the de-icing agent
sodium chloride (NaCl).

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4.7 Saline Concentration
The saline concentration is calculated from the current freezing temperature.
Note: The saline concentration can only be determined if ice percentages have already
formed. Determination of saline concentration is currently limited to the de-icing agent
sodium chloride (NaCl).
4.8 Snow Height
The sensor detects the snow height in the field of measurement.
Note: the snow height is an additional information and it is not part of the water equivalent.
4.9 Friction
Friction describes the grip of tires on the road surface. This can be reduced as a result of
environmental influences such as rain or snow. The value of the friction is scaled between
0.1 and 1.0. High values indicate a good grip, and low values indicate a bad grip. The
highest value is reached in dry road conditions. If there is water on ice the lowest value is the
result.

Operating Manual V8.2/03.2017 Non Invasive Road Sensor
10 G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
Fig. 1: Sensor
Technology
4.10 Sensor Technology NIRS31-UMB
Receiver
Pyrometer
Reflector unit
Sounding pipe