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Lufft IRS31Pro-UMB User Manual

Intelligent road sensor
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© G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany. Subject to change without notice.

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Summary of Contents for Lufft IRS31Pro-UMB

  • Page 1 © G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany. Subject to change without notice.
  • Page 2 Operating Manual IRS31Pro-UMB English © G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany. Subject to change without notice.

  • Page 3: Table Of Contents

    11.3 Examples for the Creation of Addresses ......................33 11.4 Firmware-Update .............................. 33 11.5 Overview channel list of an IRS31-UMB (IRS31Pro-UMB in IRS31-UMB compatibility mode) ......34 12 Coupling with ARS31/ARS31Pro-UMB ........................37 12.1 Configuration of coupling within IRS31Pro-UMB: ....................37 13 Technical Data ................................
  • Page 4 First version 01.2014 LA/BR IRS31-UMB compatibility mode, revised channel list for TLS. 02.2014 LA/BR Coupling of IRS31Pro-UMB with ARS31-UMB 04.2014 SDI12 Protocol 03.2015 BR/LA Description of channels 900 and 905 improved; with the existing description the calculation of these values in the ASCII protocol was unclear.

  • Page 5: Please Read Before Use

    This manual is valid for the IRS31Pro-UMB from device version 8 (from February 2014). Some functions or features specified in this manual may not be available or may not be valid with older versions of the device.

  • Page 6: Scope Of Delivery

    IRS31Pro-UMB Operating Manual V10 / 01.2020 Scope of Delivery The content of the delivery consists of the following components:  Sensor IRS31Pro-UMB  Installation aid  Installation instructions  Transport packaging G. Lufft Mess- und Regeltechnik GmbH...

  • Page 7: Order Numbers

    Standard version IRS31Pro-UMB ..50 m cable length .............. ……. 8910.U050 IRS31Pro-UMB ..50 m cable length, 1 below-ground temperature sensor ... 8910.U051 IRS31Pro-UMB ..50 m cable length, 2 below-ground temperature sensors ..8910.U052 IRS31Pro-UMB ..100 m cable length ..........…………….. 8910.U100 IRS31Pro-UMB ..

  • Page 8: Equipment Description

    Depending on the requirements of the road traffic meteorological monitoring network, sensors are installed in the roadways and / or "overhead". The Lufft IRS31Pro-UMB is intended for installation in the roadway. The passive measuring instrument IRS31Pro-UMB is used to determine the road surface temperature, the height of the water film above the sensor and the saline concentration on the sensor (from which the freezing temperature is derived).

  • Page 9: Generation Of Measurements

    1, 2, 5 or 10 minutes. An average value is recommended if the measurement and sampling rates are different. Figure 2: UMB Config Tool: Sensor Configuration / Sensor Settings Menu G. Lufft Mess- und Regeltechnik GmbH...

  • Page 10: Transmission Of Measurements

    °C; °F Request channels: UMB Channel Measuring Range Measured Value Data Type Unit Freezing temp. NaCl uint16 65520 norm value Freezing temp. NaCl float32 -40.0 °C Freezing temp. NaCl float32 -40.0 32.0 °F G. Lufft Mess- und Regeltechnik GmbH...
  • Page 11 1280 lbs.p.l.mile 6.1.10 Ice Percentage Sampling rate: see section 5.3 Units: Request channels: UMB Channel Measuring Range Measured Value Data Type Unit Ice percentage float32 6.1.11 Friction Sampling rate: see section 5.3 experimental implementation G. Lufft Mess- und Regeltechnik GmbH...
  • Page 12 There is frost on the road The factory settings for the moist and wet thresholds are 10 and 200 µm, respectively. These settings can be adjusted in the sensor configuration (see screenshot). experimental implementation G. Lufft Mess- und Regeltechnik GmbH...
  • Page 13 Measured Value Data Type Unit 20001 Measurement counter uint16 65520 6.1.17 Resistance Sampling rate: see section 5.3 Units: Request channels: UMB Channel Measuring Range Measured Value Data Type Unit 32210 resistive_avg float32 -1.0E15 1.0E15 G. Lufft Mess- und Regeltechnik GmbH...

  • Page 14: Installation

    Re-insert the fixing screws of the installation aid into the open holes of the sensor. All 6 fastening screws of the cover are then tightened with a torque of 2 Nm. G. Lufft Mess- und Regeltechnik GmbH...
  • Page 15 At 100 m the result per wire is a loop impedance of 7.3 Ω. By connecting 4 wires in parallel the result is a loop impedance of 7.3 Ω / 4 = 1.83 Ω Figure 5: Example of an Extension Box G. Lufft Mess- und Regeltechnik GmbH...

  • Page 16: Connecting The Supply Cable

    The data lines and the supply voltage of each IRS31Pro-UMB must be electrically isolated from each other. This can be achieved for example by means of a LUFFT ISOCON-UMB. If the sensor is operated without electrical isolation, the sensor may be destroyed and the warranty expires!
  • Page 17 Note: When installing the system, please also pay attention to the operating instructions for the ISOCON- UMB. Attention: Errors in connection will destroy the road sensor! Attention: A connection of the sensor to 24 VDC leads after a short time to the destruction of the sensor. G. Lufft Mess- und Regeltechnik GmbH...
  • Page 18 1 ..... white ....negative power supply 2 ..... brown....positive power supply 3 ..... green ....SDI12-GND 4 ..... yellow ....SDI12 Signal Attention: The power supply lines may not be connected to earth! G. Lufft Mess- und Regeltechnik GmbH...
  • Page 19 IRS31Pro-UMB Operating Manual V10 / 01.2020 Figure 9: IRS31Pro-UMB Installation in the Road with 2 External Temperature Sensors G. Lufft Mess- und Regeltechnik GmbH...

  • Page 20: Use Of Surge Protection (8379.Usp)

    IRS31Pro-UMB Operating Manual V10 / 01.2020 Figure 10: Installing the IRS31Pro-UMB Use of Surge Protection (8379.USP) When using surge protection (order no.: 8379.USP), please note the connection example in the operating instructions for surge protection. G. Lufft Mess- und Regeltechnik GmbH...

  • Page 21: Commissioning And Testing

    Check that communication between the sensor and the evaluation unit is working properly. The road condition determined by the sensor should be checked with dry and wet sensor. The functional test is described in section 10, Configuration and Testing. G. Lufft Mess- und Regeltechnik GmbH...

  • Page 22: Maintenance

    The seal must be fitted using silicone grease. It must not cant when the plastic cover plate is inserted. The plastic cover plate must fit into the housing without the use of force. Grease the thread of the fixing screws. First lightly fasten the screws and then tighten evenly (torque 2 Nm). G. Lufft Mess- und Regeltechnik GmbH...

  • Page 23: Connections

    See section 7.3 Connecting the Supply Cable 9.1.1.1 Power Supply The IRS31Pro-UMB is supplied by a voltage of 12 VDC. The power supply unit used must be approved to operate devices of protection class III (SELV). 9.1.1.2 RS485 Interface or SDI12 The device has a half-duplex 2 wire RS485 interface with the following settings: Data bits:..
  • Page 24 1 ..white ..ext. temperature right 1 2 ..brown ..ext. temperature right 2 3 ..white ..ext. temperature left 1 4 ..brown ..ext. temperature left 2 The cable markings are based on DIN 47100. G. Lufft Mess- und Regeltechnik GmbH...

  • Page 25: Configuration And Testing

    IRS31Pro-UMB Operating Manual V10 / 01.2020 10 Configuration and Testing Lufft provides PC software for configuration purposes. With the aid of this software the device can be adjusted in accordance with the user's requirements. 10.1 Factory Settings The IRS31Pro-UMB is delivered with the following settings: Class ID: .........
  • Page 26 10, 20, 30 or 60 seconds. (Factory setting: 10 seconds) Number of measurements for average: The number of measurements that are used to generate the moving average. This can be configured between 1 and 20. G. Lufft Mess- und Regeltechnik GmbH...
  • Page 27 55h(85d) is reported. When the temperature is above the temperature limit for freezing temperature calculations the error value 55h(85d) also is reported. This error message means that the sensor is unable to measure due to ambient conditions. G. Lufft Mess- und Regeltechnik GmbH...
  • Page 28 NaCl. Threshold [µm] dry-moist: When the water film height lies below the threshold set here, the IRS31PRO-UMB transmits the road surface condition "dry" (provided that no ice is detected) and no longer calculates the freezing temperature. (Factory setting 10µm)
  • Page 29 IRS31Pro-UMB Operating Manual V10 / 01.2020 Figure 15: Sensor Configuration: Coupling of IRS31Pro-UMB with ARS31 Coupling with the ARS31Pro-UMB see chapter 12. 10.2.5 Measurement Polling Channels Each channel can be enabled for measurement polling by clicking the respective channel. Figure 16: Select the Channels for Measurement Polling 10.2.6 Firmware Update...

  • Page 30: Function Test With The Umb Config Tool

    Note: Channel selection relates to measurement polling for the UMB Config Tool only. In general, all channels are always available for polling and do not need to be enabled in the sensor. 10.3.2 Example of Measurement Polling Figure 19: Measurement Polling with the UMB Config Tool G. Lufft Mess- und Regeltechnik GmbH...
  • Page 31 Note: The UMB Config Tool is provided for test and configuration purposes only. It is not suitable for the permanent acquisition of measurement data. We recommend the use of professional software solutions for this purpose, e.g. SmartView3. G. Lufft Mess- und Regeltechnik GmbH...

  • Page 32: Irs31-Umb Compatibility Mode

    IRS31 encoded road conditions 11.1 Important notes for using Sensor in compatibility mode  When an IRS31Pro-UMB is set to IRS31-UMB compatibility mode, you have to add an IRS31-UMB to your measurement setup to configure or test the sensor. ...

  • Page 33: Examples For The Creation Of Addresses

    Figure 21: Model parameters 11.3 Examples for the Creation of Addresses If, for example, a road sensor IRS31Pro-UMB is to be addressed with the device ID 1, this is achieved as follows: Class ID for the road sensor IRS31Pro-UMB is 9 = 9h Device ID is 1= 1h Placing the class and device ID’s together gives the following address 9001h = 36865d.

  • Page 34: Overview Channel List Of An Irs31-Umb (Irs31Pro-Umb In Irs31-Umb Compatibility Mode)

    IRS31Pro-UMB Operating Manual V10 / 01.2020 11.5 Overview channel list of an IRS31-UMB (IRS31Pro-UMB in IRS31-UMB compatibility mode) The channel assignment applies to online data requests in UMB protocol. The data types used are described in section 6.1.1 The change between average value and current measurement is done on an IRS31-UMB with the sensor configuration.
  • Page 35 Road is covered with snow or slush. Road is covered with ice (solid, frozen water and frozen aqueous solution). Frost. Sensor is unable to determine the road surface condition due to the prevailing conditions. G. Lufft Mess- und Regeltechnik GmbH...
  • Page 36 8 bit 0…100 = 0d Thawing material = 100d concentration Error (255d = FFh) 1074 Result message 8 bit 0…100 1g/m = 0d Thawing material per square = 100d meter Error (255d = FFh) G. Lufft Mess- und Regeltechnik GmbH...

  • Page 37: Coupling With Ars31/Ars31Pro-Umb

    ARS31-UMB timeout sets the time after which the IRS31Pro-UMB resets a freezing temperature reported by an ARS31(Pro)-UMB. After this time an IRS31Pro-UMB uses a freezing temperature of -0.1°C for all model calculations. This usually should be a time 3-5 times the time between 2 measurement queries of an ARS31(Pro)-UMB.
  • Page 38 The freezing temperature mode is off, the takeover of ARS31(Pro)-UMB freezing temperature is disabled in the sensor configuration of the IRS31Pro-UMB. The freezing temperature mode is switched on, and in the IRS31Pro-UMB a valid freezing temperature of the configured ARS31(Pro)-UMB exists.

  • Page 39: Technical Data

    0.2mm to 4mm: better than +/-30% Sampling rate: Variable (10 sec….60 sec) Units: µm, mil 13.1.3 Freezing Temperature Measurement process: Calculated from saline concentration Measuring range: -40°C … 0°C Resolution: 0.1°C Factory setting and baud rate for firmware update G. Lufft Mess- und Regeltechnik GmbH...
  • Page 40 0.1% Accuracy: see freezing temperature Sampling rate: Variable (10 sec….60 sec) Units: 13.1.6 Friction Measurement process: Calculated from ice percentage Measuring range: 0 … 1 Resolution: 0.01 Sampling rate: Variable (10 sec. ….60 sec.) G. Lufft Mess- und Regeltechnik GmbH...

  • Page 41: Fault Description

    Device transmits error value 33h contact the manufacturer’s technical support service (51d) Device transmits freezing - The Sensor is too warm temperature - The Sensor is dry - The sensor is covered with ice G. Lufft Mess- und Regeltechnik GmbH...

  • Page 42: Certifications

    2. This device must accept any interference received, including interference that may cause undesirable operation. Any changes or modifications not expressly approved by the responsible party for compliance (G. Lufft Mess- und Regeltechnik GmbH) could void the user’s authority to operate the equipment.

  • Page 43: Disposal

    For further information on the return procedure, please contact your local sales contact. You will find the addresses of all sales partners in the internet on "www.lufft.com". Please take into consideration also the national implementation of the EU guideline 2012/19/EU of your country.

  • Page 44: Appendix

    Saline concent.MgCl2 float32 1280 lbs.p.l.mile Saline concent.CaCl2¹ uint16 65520 norm value Saline concent.CaCl2 float32 Saline concent.CaCl2 float32 Saline concent.CaCl2 float32 1280 lbs.p.l.mile Ice percentage Ice percentage float32 Friction Friction float32 Road condition Road condition uint8 G. Lufft Mess- und Regeltechnik GmbH...

  • Page 45: Channel List Summary Per Tls2012 Fg3

    Result message 16 bit -30 … +80°C 0.1°C 80.0 = 800d 0320h Below-ground temperature at = 0d 0000h depth 3 -0.1 = -1d FFFFh -30.0 = -300d = FED4h (30cm) Error (32767d = 7FFF) G. Lufft Mess- und Regeltechnik GmbH...

  • Page 46: Communication In Binary Protocol

    SOH <ver> <to> <from> <len> STX <cmd> <verc> <payload> <cs> Control character for the start of a frame (01h); 1 byte <ver> Header version number, e.g.: V 1.0 <ver> = 10h = 16d; 1 byte G. Lufft Mess- und Regeltechnik GmbH...
  • Page 47 Putting the class and device IDs together gives the address 9001h (36865d). 18.3.4 Example of a Binary Protocol Request If, for example, an IRS31Pro-UMB device with the device ID 001 is to be polled from a PC for the current road surface temperature, this takes place as follows:...
  • Page 48 You can find further information in the description of a CRC calculation in the UMB protocol. 18.3.7 Recording of a Communication with the UMB Config Tool The UMB Config Tool uses the command ‘Online data request multiple channels’ (2Fh) for the data request. G. Lufft Mess- und Regeltechnik GmbH...

  • Page 49: Communication In Ascii Protocol

    6.1. Example: Request: &_36865_M_00100 By way of this request, channel 100 of the device with address 36865 (IRS31Pro-UMB with device ID 001) is requested. Response: $_36865_M_00100_34785 This channel outputs a temperature from –40 to +80°C; this results in the following calculation:...
  • Page 50 <e2version> <deviceversion> 18.4.8 Normalization of Measurement Values in ASCII Protocol The normalization of measurement values from 0d – 65520d corresponds to the measuring range of the respective measurement variable. Measuring Range Measurement Variable Unit G. Lufft Mess- und Regeltechnik GmbH...
  • Page 51 Measurement data error or no valid data available 65526d Device / sensor unable to execute valid measurement due to ambient conditions 65527d Measurement error 65528d Channel off (deactivated) 65534d Invalid calibration 65535d Unknown error G. Lufft Mess- und Regeltechnik GmbH...

  • Page 52: Communication In Sdi12 Protocol

    IRS31Pro-UMB Operating Manual V10 / 01.2020 18.5 Communication in SDI12 Protocol The communication in the SDI-12 mode of the IRS31Pro-UMB is conforming to the standard defined in ‚SDI-12 A Serial-Digital Interface Standard for Microprocessor-Based Sensors Version 1.3 January 12, 2009‘...
  • Page 53 18.5.2 Command Set For details of the SDI-12 protocol please refer to the above mentioned standard document. Following commands are available for the IRS31Pro-UMB: Note: The examples in the following sections use italics to print the requests from the logger (0V!)
  • Page 54 9 measurement values are available 0D0! 0+1.5+2.7+3.5-5.5+3.7<CR><LF> Road temperature 1.5°C, external temperature 1 2.7°C, external temperature 2 3.5°C, freezing temperature -5.5°C Salzkonzentration 3,7% 0D1! 0+183+0.0+0.78+15<CR><LF> Water film height 200um, ice percentage 0.0% friction 0.78, road condition 15 (moist) G. Lufft Mess- und Regeltechnik GmbH...
  • Page 55 Road temperature 1.5°C, external temperature 1 2.7°C, external temperature 2 3.5°C, freezing temperature -5.5°C Salzkonzentration 3,7% 0D1! 0+183+0.0+0.78+15<CR><LF> Water film height 200um, ice percentage 0.0% friction 0.78, road condition 15 (moist) 0D2! 0+5.1<CR><LF> Saline concentration 5.1 g/m2 G. Lufft Mess- und Regeltechnik GmbH...
  • Page 56 801/806 100,0 Buffer ‘1’ Water Film Height 602/607 393,70 Ice Percent 810/815 100,0 Friction 820/825 Road Condition 900/905 10, 15, 20, 25, 30, 35, 40, 45 Buffer ‘2’ Saline Concentration lbs/mi 920/925 1280,0 lbs/mi G. Lufft Mess- und Regeltechnik GmbH...
  • Page 57 2, ext. temp. 2 buffer, saline concentration, saline concentration buffer Status group 3: +nnnn water film height, water film height buffer, road condition, road condition buffer Measurement value Unit Channel measurement counter 20001 65520 G. Lufft Mess- und Regeltechnik GmbH...
  • Page 58 FLASH_FLOAT_ERR MEAS_ERROR MEAS_UNABLE INIT_ERROR VALUE_OVERFLOW CHANNEL_OVERRANGE VALUE_UNDERFLOW CHANNEL_UNDERRANGE BUSY other sensor status Example (SDI-12 Address ‘0’, no error): 00004<CR><LF> 0D0! 0+0000+0000+0000+523<CR><LF> Example (SDI-12 Address ‘0’, measurement of saline concentration not possible): 00004<CR><LF> 0D0! 0+0000+0044+0000+738<CR><LF> G. Lufft Mess- und Regeltechnik GmbH...
  • Page 59 Command: nnn: water film height threshold in µm aXW+nnn<CR><LF> Response: The response to the attempt of setting of an invalid value is aXWf<CR><LF> Example: The threshold is set to 220 µm 0XW+220! 0XW+220<CR><LF> G. Lufft Mess- und Regeltechnik GmbH...
  • Page 60 18.5.12 Message: Station Reset The command initiates a station reset. aXR! Command: Response: aXRok<CR><LF> The response is followed by the station reset, i.e. the station will be offline for a few seconds. Example: 0XR! 0XRok<CR><LF> G. Lufft Mess- und Regeltechnik GmbH...

  • Page 61: List Of Figures

    Figure 7: Examples of the Earthing of the Cable Screening ..................... 17 Figure 8: ISOCON-UMB Connection ..........................17 Figure 9: IRS31Pro-UMB Installation in the Road with 2 External Temperature Sensors ..........19 Figure 10: Installing the IRS31Pro-UMB ........................... 20 Figure 11: Sensor Selection ............................. 25 Figure 12: Sensor Configuration –...

  • Page 62: Index

    Technical Data Technischer Support General Settings Testing TLS2012, Channel List per…. Transmission of measurements Housing, connections in the… UMB-ConfigTool Ice Percentage 11, 40 ID, device and class... Incorrect use Water Film Height Installation Weight G. Lufft Mess- und Regeltechnik GmbH...

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