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OTT SVR 100 Operating Instructions Manual

Surface velocity radar
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Operating Instructions
Surface Velocity Radar
OTT SVR 100

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Summary of Contents for OTT SVR 100

  • Page 1 Operating Instructions Surface Velocity Radar OTT SVR 100...
  • Page 2 We reserve the right to make technical improvements!

  • Page 3: Table Of Contents

    9 Information on disposal of old devices 10 Troubleshooting 11 Technical Data Appendix A – Connecting the OTT SVR 100 to OTT netDL via the RS-485 interface Appendix B – Wall bracket dimensions/mounting hole positions Appendix C – Note on the declaration of conformity Appendix D –...

  • Page 4: Scope Of Supply

    – RS-485 interface with Modbus protocol (preset) 63.151.002.9.0 Accessories OTT USB/SDI-12 interface 65.050.001.9.2 – for temporary connection of OTT sensors to a PC using an SDI-12 or RS-485-interface – including USB connecting lead; USB A to USB B connector; 3 m RS-232 connecting lead 97.120.371.4.2...

  • Page 5: Basic Safety Instructions

    OTT SVR 100. Retain these operating instruc- tions for subsequent reference The OTT SVR 100 is used for contactless measurement of the surface velocity of a flowing waterway. Only use the OTT SVR 100 as described in these operating instructions.

  • Page 6: Introduction

    A physical RS-485 interface is available to connect the OTT SVR 100 to a data logger or peripherals, and communication with the radar sensor is via the SDI-12 or Modbus transmission protocol .
  • Page 7 A swivel mount allows easy, problem-free installation, even on unsuitable sur- faces. The electrical connection is via a factory-assembled 12-pin angled con - nector and a mounting socket. Fig. 2: OTT SVR radar sensor overview. Swivel mount Transmission and reception aerial cover...
  • Page 8 OTT RLS OTT SVR 100 The projection of the OTT SVR 100 radar footprint on the water surface is elliptical. In the example shown here, the water level is determined using a contactless OTT RLS...

  • Page 9: Installing The Ott Svr 100

    Risk of explosion due to spark formation and electrostatic charge If the OTT SVR 100 is operated in an explosive atmosphere, there is a risk of the atmosphere igniting. This can cause an explosion involving a risk of very severe injury and damage.
  • Page 10 An optimum measuring point has a uniformly shaped cross-section with an even velocity distribution and a stable position of the maximum surface velocity. Avoid large metallic surfaces close to the sensor radar footprint (reflections from these surfaces can falsify the measured result). Table for determining the approximate size of the sensor radar footprint: Height "h"...

  • Page 11: Information On Supply Voltage

    Distance „a“ (centre of sensor radar footprint) 5.2 Information on supply voltage The OTT SVR 100 requires a supply voltage of 9 … 28 V DC, typically 12/24 V (e.g. form battery or mains connection with electrically isolated safety extra low voltage).

  • Page 12: Installing The Ott Svr 100

    5.4 Installing the OTT SVR 100 Attaching the swivel mount (see also Appendix C) Surface: Concrete or brickwork Attachment material: e.g. hexagonal wood screws M6 x 40 + plastic dowels Make two holes (Ø 8 mm) using a hammer drill (use the wall bracket for marking the holes).
  • Page 13 Connecting the cable with angled connector Please note: No moisture may get into the angled connector/the mounting socket. Protect the OTT SVR 100 from precipitation during installation. Ingress of moisture can lead to malfunctions and corrosion. Align the angled connector in the correct position (observe keying nose) and fit on the mounting socket.
  • Page 14 Fig. 10: OTT SVR 100 – Installation of swivel mount. Wall bracket Hexagon bolt A Housing bracket Hexagon bolt B...
  • Page 15 Fig. 11: Adjusting the sensor tilt angle ( ) on the OTT SVR 100. 0° 20° 30° 20° ≤ ≤ 60° Recommended: = 30° 45° 60°...

  • Page 16: Connecting The Ott Svr 100 To The Data Logger

    5.5 Connecting the OTT SVR 100 to the data logger Connect the OTT SVR 100 to an SDI-12 input on the data logger. Refer to the data logger manual for more details. Refer to Figure 12 for the OTT SVR 100 terminal assignment.

  • Page 17: Sdi-12-Commands And Responses

    All advanced, manufacturer-specific SDI-12 commands on the OTT SVR 100 begin with " " for OTT. With these commands it is possible to configure the OTT SVR 100, for example using the "SDI-12 transparent mode" on a data logger or with the OTT USB/SDI-12 interface (accessory).

  • Page 18: Standard Commands

    Start measurement – Sensor address – Time in seconds until sensor has determined measured result OTT SVR 100 response = 000 seconds – Number of measured values OTT SVR 100 response = 6 a<value1><value2><value3> … Send data (after aM!) aD0! …...
  • Page 19 ¨ unacceptable measured values aR0! a<value1><value2><value3> … … <value4><value5><value6> … The OTT SVR 100 continuously measures the flow velocity … <CR><LF> without the aM!/aD0! command combination; for details This command enables measured results to be obtained even see aD0! command.

  • Page 20: Advanced Sdi-12 Commands

    – Sensor address 1 = Floating mean Factory setting: 1 The OTT SVR 100 determines approx. 20 individual mea- sured values for the flow velocity per second. Depending on factors such as the roughness of the water surface, wind influence, precipitation or turbulence, the individual mea- sured values can be very scattered.
  • Page 21 Set flow direction filter Read flow direction filter <value> – 0 = Filter is deactivated ¨ The OTT SVR 100 – Sensor address determines the flow velocities towards sen- (–1/+1) in the response to the aD0! com- sor and away from the sensor. The value 4 mand shows the corresponding flow direc- tion.

  • Page 22: Performing Maintenance Work

    7 Performing maintenance work The OTT SVR 100 radar sensor is largely maintenance free. No adjustment or calibration work is necessary. Likewise, it has no parts that have to be cyclically replaced. The following maintenance work should be performed at regular intervals, accord- ing to your local conditions: Check the OTT SVR 100 for soiling (e.g.

  • Page 23: Information On Disposal Of Old Devices

    After decommissioning, dispose of the OTT SVR 100 properly. Comply with the applicable regulations for disposal of electronic devices in your country. Never dispose of the OTT SVR 100 with normal household waste. Materials used See Chapter 11, Technical data...

  • Page 24: Troubleshooting

    10 Troubleshooting Sensor not responding to RS-485 interface Sensor correctly connected to a data logger with SDI-12-input (master)? ¨ Correct terminal assignment. Supply voltage polarity reversed? ¨ Correct terminal assignment. Supply voltage < 9 V or > 27 V? ¨ Correct supply voltage level (check length and cross section of connecting cable).

  • Page 25: Technical Data

    11 Technical Data Measuring range 0.08 … 15 m/s Resolution 0.1 mm/s Measuring accuracy ±2 % of measured value Measuring time Continuous measurement Supply voltage 9 … 27 V Current consumption Typical < 112 mA bei 12 V Maximum < 250 mA Transmission frequency (min./typ./max.) 24.050/24.125/24.200 GHz (K-band) Transmission power...

  • Page 26: Appendix A - Connecting The Ott Svr 100 To Ott Netdl Via The Rs-485 Interface

    RS-485 interface). Refer to Chapter 5.3 for the maximum cable length and recommended wire cross-section. Connect the OTT SVR 100 to the OTT netDL IP data logger as shown in Figure A1. Also refer to the OTT netDL operating manual.
  • Page 27 Therefore, six channels on the OTT netDL are necessary to record all measured values from an OTT SVR 100. The first channel contains the SDI-12 Master or OTT SDI RS485 function block as the input signal. The second channel contains a vir tual sensor (V02) as the input signal.

  • Page 28: Appendix B - Wall Bracket Dimensions/Mounting Hole Positions

    Appendix B – Wall bracket dimensions/mounting hole positions 114.5 all measures in mm...

  • Page 29: Appendix C - Note On The Declaration Of Conformity

    Appendix C – Note on the declaration of conformity If required, you can download the current version of the declaration of conformity for the OTT SVR 100 from our website as a PDF file: "www.ott.com/resources".

  • Page 30: Appendix D - Rs-485 Interface With Modbus Protocol (Rtu)

    Appendix D – RS-485 interface with Modbus protocol (RTU) D.1 Prerequisites Transmission parameter 1 stop bit, even parity Transmission speed Factory setting: 9 600 RS-485 interface protocol Modbus Read Holding Register function (0x03) Register- Factory Access Register name number Type Value range setting mode...
  • Page 31 Register- Fartory Access- Register name number Type Value range setting mode Unit RS-232 protocol 0011 unsigned word 1¨ NMEA RS-485 protocol 0012 unsigned word 1 ¨ Modbus 2 ¨ SDI-12 Preset Single Register function (0x06) Register- Factory Access Register name number Type Value range...

  • Page 32: Appendix E - Ott Svr 100 Operating Program

    Appendix E – OTT SVR 100 Operating Program The "OTT SVR 100 Operating Program" PC software is available for service pur- poses. You can use this software to establish a temporary connection to the OTT SVR 100 via the RS-232 interface and...
  • Page 33 6 measured values as instanta- neous values every 5 seconds. In addition the operating program plots the instan- taneous values "average flow velocity" and "current flow velocity" graphically. Fig. E2: Setting OTT SVR 100 operating " parameters with the OTT SVR 100 "...
  • Page 36 OTT Hydromet GmbH Ludwigstraße 16 87437 Kempten · Deutschland Telefon +49 831 5617- 0 Telefax +49 831 5617- 209 Document number 63.151.001.B.E 01-0418 info@ott.com · www.ott.com...

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