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OTT HydroMet Lufft SHM31 Operational Manual

Snow depth sensor
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SHM31 Snow Depth Sensor
Operational Manual

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Summary of Contents for OTT HydroMet Lufft SHM31

  • Page 1 SHM31 Snow Depth Sensor Operational Manual...
  • Page 2 70736 Fellbach Germany +49 711 51822 -0 met-info@otthydromet.com www.otthydromet.com All rights reserved. All content is the intellectual property of OTT HydroMet. Reprinting, duplication and translation (even as excerpts) are only permitted with the prior written consent of OTT HydroMet. Subject to technical change.

  • Page 3: Table Of Contents

    Table of contents Scope of supply Order numbers and variant code Product variants Accessories and spare parts About this manual Other applicable documents General signs and symbols Explanation of warnings General safety instructions Intended use Potential misuse Personnel qualification Operator obligations Personnel obligations Correct handling Installation and maintenance at high places...
  • Page 4 Commissioning Switching on the device 8.1.1 Factory settings 8.1.2 Settings over RS-232 or RS-485 8.1.3 Performing automatic zero measurement Configuration using ConfigTool.NET 8.2.1 Basic installation with ConfigTool.NET and serial interface 8.2.2 Calibrating the device 8.2.3 Setting parameters 8.2.4 Checking function 8.2.5 Starting measurement Communication over UMB or Modbus mode...
  • Page 5 Technical data 13.1 General technical data 13.2 Electrical data 13.3 Data transfer 13.4 Measuring range and accuracy 13.5 Dimensions and weight <5>...

  • Page 6: Scope Of Supply

    1 Scope of supply The following items are included with delivery: – SHM31 sensor – Test report – Quick start guide – USB stick with the SHM31 Operational Manual and ConfigTool.NET software <6>...

  • Page 7: Order Numbers And Variant Code

    2 Order numbers and variant code 2.1 Product variants Variant Order number Snow depth sensor SHM31 8365.30 2.2 Accessories and spare parts Item Order number SHM mounting clamp, steel, up to 80 mm 8365.608-11 SHM mounting clamp, steel, up to 300 mm 8365.609-11 SHM mounting clamp, steel, standard up to 72 mm 8365.610-11...

  • Page 8: About This Manual

    3 About this manual 3.1 Other applicable documents The following documents and software contain further information on installation, maintenance and calibration: – User Manual SHM31 Snow Depth Sensor – UMB protocol – ConfigTool.NET software – Firmware The documents and software can be downloaded at: www.otthydromet.com 3.2 General signs and symbols The signs and symbols used in the operational manual have the following meaning: Practical tip...

  • Page 9: Explanation Of Warnings

    3.3 Explanation of warnings To avoid personal injury and material damage, you must observe the safety information and warnings in the operating manual. The warnings use the following danger levels: WARNING WARNING This indicates a potentially hazardous situation. If the hazardous situation is not avoided, it may result in death or serious injuries.

  • Page 10: General Safety Instructions

    4 Do not change or convert the product in any way. 4 Do not perform any repairs yourself. 4 Get OTT HydroMet to examine and repair any defects. 4 Ensure that the product is correctly disposed of. Do not dispose of it in household waste.

  • Page 11: Installation And Maintenance At High Places

    4.7 Installation and maintenance at high places When the product is installed and maintained at high places, special safety measures must be taken to avoid personal injury. 4 Observe and follow the local safety regulations. 4 Use suitable safety equipment. 4 Inspect the safety equipment before use.

  • Page 12: Product Description

    5 Product description 5.1 Design and function The snow depth sensor is used for snow weather monitoring. The device is connected by way of an 8-pin plug-in terminal and associated connection cable. The measured values are requested over the RS-485 or RS-232 interface with UMB protocols or SDI-12. During commissioning via RS-485 with UMB binary protocol, configuration and verification takes place using the ConfigTool.NET software.

  • Page 13: Transport, Storage, And Unpacking

    6 Transport, storage, and unpacking 6.1 Transport 4 Transport the product always in its original packaging. 4 Ensure that the product is not mechanically stressed during transport. 6.2 Storage 4 Store within specified temperature ranges. 4 Store in dry area. 4 Store in original box where possible.

  • Page 14: Installation

    7 Installation 7.1 Mechanical installation 7.1.1 Required tools and aids The following tools and aids are required: – adjustable wrench – screwdriver for electrical connections on terminal block, size 2 x 40 mm to 2,5 x 65 mm 7.1.2 Installing device 4 Mount the mast clamp securely to the mast. The sequence of the following installation is not fixed and depends on the local conditions.

  • Page 15: Alinging Device

    4 Place the device on mast clamp pins using the 360° perforated ring and lock with the tristar knob. 7.1.3 Alinging device 4 Align the device at an tilt angle (α) of 10 to 30 degrees to the surface. This prevents that snow falling from the mast or the device itself from affecing the measured result. If an angle is too large, this causes the laser beam to hit the ground at too flat an angle, which may give a vague and inconsistent distance measurement result.

  • Page 16: Electrical Installation

    7.2 Electrical installation 7.2.1 Electrical connections There is an 8-pin plug on the device’s housing. This serves to connect the supply voltage and the data interface via the connection cable. Pin assignment Number Color Assignment Comment Pink RS-232_TX RS-232 transmission line Yellow B_RS-485 / SDI-12 RS-485 B / SDI-12 data line...

  • Page 17: Commissioning

    8 Commissioning 8.1 Switching on the device WARNING Risk of eye injury due to laser beams! Looking directly into the laser beam can injure the eyes. 4 Do not look directly into the laser beam. 4 Observe the laser beam indirectly. As soon as the device is supplied with power, it starts its internal measuring cycle and can be addressed over RS-232, RS-485 or SDI-12.

  • Page 18: Configuration Using Configtool.net

    8.2 Configuration using ConfigTool.NET For configuration and testing OTT HydroMet Fellbach GmbH provides the proprietary software ConfigTool.NET. The ConfigTool.NET software can communicate over a serial, a Bluetooth or a network interface and allows the following communication steps: – Reading out the device’s individual UMB channels –...
  • Page 19 4 Use the device template download function to update the list of available UMB channels. 4 Confirm the changes with OK, or click on Cancel to return to the start screen. 4 To create a new workspace, click the Edit Workspaces icon. Different workspaces can be set up to manage sensor settings and measurements.
  • Page 20 4 To assign a device to the new workspace, click the Add Device icon. ð The Add Device window appears. 4 Enter a Name for the device. 4 Select the SHMX-UMB from the Device Class drop-down menu. 4 Confirm the changes with OK. ð...

  • Page 21: Calibrating The Device

    8.2.2 Calibrating the device 4 Click the device row on the Workspace Details page to open the Device Details page. 4 Click the Settings icon to open the Device Settings page. 4 On the Device Settings page click the Calibration icon.

  • Page 22: Setting Parameters

    8.2.3 Setting parameters Once the device is calibrated, additional parameter can be set on the Device Settings page. 4 To open the Device Settings page, see section Calibrating the device [} 21]. 4 Set the Transmission interval [s] in the UMB-ASCII 2.0 section. This value determines how often the device will provide new snow depth.
  • Page 23 Parameter Default value Range Description Timeout for protocol change 1 to 60 Duration after which the protocol is [min.] being reactivated in the case of a temporary changeover. RS-485 Parity 8n1, 8e1, 7e1 Serial port parity setting (sdi-12), 8n2 Imperial units for SDI-12 metric metric, sdi-12 us- –...
  • Page 24 Parameter Default value Range Description Hold time for window defrost 1 to 255 Select the duration of the window [min.] defrost procedure. Hold time for block defrost [min.] 15 1 to 255 Select the duration of the housing defrost procedure Automatic defrost after startup –...

  • Page 25: Checking Function

    Parameter Default value Range Description Laser parameters Laser interval [ms] 10000 1000 to 60000 Time interval for the laser- measurement of the sensor. Use below 5000 ms is not recommended. Laser mode – – Not yet implemented 8.2.4 Checking function To check the functionality of the device, all channels that ConfigTool.NET can read can be selected. For an initial sensor check, channels 500, 600, 650, 660 700 and 800 are recommended.

  • Page 26: Starting Measurement

    8.2.5 Starting measurement 4 Select how often to poll the device for measured values from the Measurement query rate drop-down menu on the right-hand side of the start page. ð The measured values are written to the log file at the selected interval. The interval does not change the device's measuring sequence previously defined in the device settings.

  • Page 27: Maintenance

    9 Maintenance 9.1 Checking signal quality If the device seems to be measuring insufficiently, the quality of the signal can be checked with the target plate set (8365.KWK-SET). The set consists of the following DIN A4-sized plastic plates: – White card in protective cover with approx 85 % reflectance –...

  • Page 28: Cleaning The Target Plate Set

    The domain for the signal intensity (signal normalized) is between 0 and 255. The sensors are set to achieve a value of approximately 50 for the black plate and 200 for the white plate. The exact values for the calibration are documented in the factory certificate.
  • Page 29 4 Click on the update icon (1) and select the downloaded Firmware File (2) in the Firmware Update window. 4 Ensure that the check box Reboot is selected. Otherwise, only the firmware is transferred, but the device does not work with the new firmware. 4 Click on Update.

  • Page 30: Troubleshooting

    10 Troubleshooting 10.1 Error elimination Error Possible cause Corrective action Device cannot be queried or is not Incorrect connection 4 Check the power supply. responding 4 Check the cable. 4 Check the interface connection. If necessary, use the RS-232 interface to determine whether the error is only with the RS-485 interface.
  • Page 31 Error code Description SIO framing error; serial interface parameter not set correctly to 8N1 Evaluation routine: In some cases, measurements in the calculation interval were ignored because they would have exceeded the maximum permitted change in snow depth. Evaluation routine: The most recently valid snow depth was output, as all measurements in the calculation interval would have exceeded the maximum permitted snow depth change.

  • Page 32: Repair

    11 Repair 11.1 Customer support 4 Have repairs carried out by OTT HydroMet service personnel. 4 Only carry out repairs yourself, if you have first consulted OTT HydroMet. 4 Contact your local representative: www.otthydromet.com/en/contact-us 4 Include the following information: – instrument model –...

  • Page 33: Notes On Disposing Of Old Devices

    In accordance with the German Electrical and Electronic Equipment Act (ElektroG; national implementation of EU Directive 2012/19/EU), OTT HydroMet takes back old devices in the Member States of the European Union and disposes of them in the proper manner. The devices that this concerns are labeled with the following symbol:...

  • Page 34: Technical Data

    13 Technical data 13.1 General technical data Specification Value Laser classification Laser Class 2 (IEC 60825-1:2014) Protection type IP68 Operating temperature range -40 to +50 °C Without heating -10 to +50 °C (laser inactive -15 °C) ≤ Storage temperature range -25 to +70 °C Humidity range 0 to 100 % Housing Sheet aluminum 13.2 Electrical data Specification Value Power supply...
  • Page 35 13.4 Measuring range and accuracy Specification Value Snow depth 0 to 15 m Mounting distance to surface 0.1 to 16 m Tilt angle to the vertical position 10° to 30° Accuracy ± (5 mm + 0.06 %) Repeatability 0.6 mm Precision, reproducibility 5 mm Signal intensity (normalized) 0 to 255 13.5 Dimensions and weight 130 mm...
  • Page 36 Contact Information...

This manual is also suitable for:

8365.30

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