GHM Delta OHM HD52.3D Series Operating Manual

GHM Delta OHM HD52.3D Series Operating Manual

Ultrasonic anemometers

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English
Companies / Brands of GHM
Operating manual
Ultrasonic anemometers
HD52.3D... series
www.deltaohm.com
Keep for future reference.

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Summary of Contents for GHM Delta OHM HD52.3D Series

  • Page 1 English Operating manual Ultrasonic anemometers HD52.3D… series Companies / Brands of GHM www.deltaohm.com Keep for future reference.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ....................3     ..................4     VAILABLE VERSIONS TECHNICAL SPECIFICATIONS ................5     DESCRIPTION ....................... 8     MEASURING PRINCIPLE OF WIND SPEED AND DIRECTION ........ 10     INSTALLATION ....................11    ...
  • Page 3: Introduction

    1 INTRODUCTION The instruments of the series HD52.3D… are 2-axis ultrasonic static anemometers. The availa- ble measurement options combine in a single instrument the main quantities of meteorological interest, making the instrument like a compact and light meteorological station. Measured quantities: ...
  • Page 4: Available Versions

    VAILABLE VERSIONS The table below shows the measuring quantities available in the different models of the series: TAB. 1.A – Available versions Relative Wind Wind humidity Solar Barometric Model Rainfall speed direction radiation pressure Temperature   HD52.3D   ...
  • Page 5: Technical Specifications

    2 TECHNICAL SPECIFICATIONS Wind speed Sensor Ultrasounds Measuring range 0…60 m/s (0…50 m/s with rain gauge option) Resolution 0.01 m/s Accuracy ± 0.2 m/s or ± 2%, the greatest (0…35 m/s), ± 3% (> 35 m/s) Wind direction Sensor Ultrasounds Measuring range 0…359.9°...
  • Page 6 Communication protocols NMEA, MODBUS-RTU, SDI-12, proprietary RS232 and RS485 Analog outputs 2 analog outputs, for wind speed and direction. Output at choice among 4…20 mA (standard), 0…1 V, 0…5 V and 0…10 V (option 0…10 V needs 15…30 Vdc power supply) Wind speed averaging interval Configurable from 1 s to 10 min Electrical connection...
  • Page 7 Mast Mast HD52.3D / HD52.3D4 HD52.3DP / HD52.3DP4 40 ext. Mast 36 int. HD52.3DT147 HD52.3D… V2.2...
  • Page 8: Description

    3 DESCRIPTION 1. Pyranometer 2. Ultrasonic sensors for the measurement of wind speed and direction 3. Protective shield from solar radiation for relative humidity and temperature sensors 4. Fixing clamp to Ø 40 mm mast Note: in the models measuring barometric pressure, the pressure sensor is inside the instru- ment.
  • Page 9 Version with rain gauge 1. Rain gauge 2. Ultrasonic sensors for the measurement of wind speed and direction 3. Protective shield from solar radiation for relative humidity and temperature sensors 4. Fixing clamp to Ø 40 mm mast HD52.3D… V2.2...
  • Page 10: Measuring Principle Of Wind Speed And Direction

    4 MEASURING PRINCIPLE OF WIND SPEED AND DIRECTION Wind speed and direction are determined by measuring the time taken by ultrasonic pulses to cover the distance from the transducer that generates the pulse to the receiving transducer. The instrument uses 2 pairs of transducers oriented along two orthogonal axes. Detecting the wind speed along two axes allows determining not only the intensity but also the wind direc- tion.
  • Page 11: Installation

    5 INSTALLATION To install the instrument, pass the connection cable inside the support mast and connect the 19-pole M23 female connector of the cable to the 19-pole M23 male connector situated at the bottom of the instrument. Ensure connection stability by tightening the connector external nut. Align the instrument to the desired direction (see par.
  • Page 12: Alignment Of The Instrument

    For version with rain gauge option it is reccommended to place the instrument at a height not exceeding 3 m (the precipitation measurement is standardized at ground level, as it is very af- fected by the presence of wind). It is very important to place the instrument on a rigid mast, as the oscillation of the mast could cause false detections of the tipping bucket of the rain gauge.
  • Page 13 For an accurate alignment, connect the instrument to a PC (see following chapters for commu- nication protocols), then rotate the instrument on its vertical axis until the compass measures 0.0° ± 0.1°. When evaluating the wind direction, one should take into account that the geographic North differs from the magnetic North indicated by the compass.
  • Page 14: Electrical Connections

    LECTRICAL ONNECTIONS All connections are performed through a 19-pole M23 male connector situated at the bottom of the instrument. The figure and the table below show numbers and function of the connector contacts and the corresponding wires of the optional CP52.x cable: Reference Visible side male...
  • Page 15: Rs232 Serial Connection

    5.2.1 RS232 SERIAL CONNECTION RS232 Port Reference of female connector solder side Power supply For RS232 connection, TX-, RX+ and serial GND signals (pin 9, 3 and 8 of M23 connector) are used, to be connected respectively to RX, TX and GND signals of RS232 port on PC (pin 2, 3 and 5 of 9-pole SubD connector).
  • Page 16: Rs422 Serial Connection

    signal repeater between a segment and the successive one. Line termination should be applied at both ends of each segment. The maximum length of the cable depends on the transmission speed and the cable character- istics. Typically, the maximum length is 1200 m. The data line should be kept separated from any power lines in order to prevent interference with the transmitted signal.
  • Page 17: Serial Connection

    5.2.4 SDI-12 SERIAL CONNECTION SDI-12/USB or SDI-12/RS232 Reference of female converter or connector solder side data logger with SDI-12 input Other sensors with SDI-12 output Power supply SDI-12 standard has three connection wires: power supply +12V, data line and ground. Up to 10 sensors can be connected in parallel, each of them identified by its own address.
  • Page 18: Connection Of Rs52 Cable

    5.2.6 C RS52 ONNECTION OF CABLE If the PC is not equipped with RS232 serial ports, but with USB ports only, the RS52 adapting ca- ble (with built-in USB/RS232 converter) should be interposed between the PC and the instrument. RS52 cable Reference of female connector solder side To use the RS52 cable, the drivers included in the HD52.3D-S software package should be in-...
  • Page 19: Configuration

    6 CONFIGURATION Configuration mode allows to read the instrument’s general info (firmware version, calibration date, serial number), to set the operation mode, to read and set the instrument operation pa- rameters. To configure the instrument, a RS232 serial connection to a PC should be performed (see par- agraph 5.2.1).
  • Page 20: Serial Commands

    ERIAL OMMANDS The tables below describe the serial commands that allow to read the current instrument con- figuration and change the operation parameters. Measuring units: Command Reply Description CGUVn &| Sets measuring unit of wind speed:  m/s if n=1 ...
  • Page 21 Parameters for proprietary RS232 and RS485 modes: Command Reply Description CU1Ac &| Sets the address for proprietary RS485 mode to c value The address is an alphanumeric character ranging within 0…9, a…z, A…Z Default : 0 RU1A & c| Reads the address for proprietary RS485 mode set in the instrument CU1Bn &|...
  • Page 22 Command Reply Description CU2Rnnnn &| Sets transmission interval of string with measurements in proprietary RS232 mode to nnnn seconds The interval should range within 1 and 3600 seconds Default : 1 second RU2R & nnnn| Reads transmission interval of string with measurements in proprietary RS232 mode 2 : M EASUREMENTS...
  • Page 23 Parameters for NMEA mode: Command Reply Description CU4Bn &| Sets Baud Rate for NMEA mode to:  2400 if n=1  4800 if n=2  9600 if n=3  19200 if n=4  38400 if n=5  57600 if n=6 ...
  • Page 24 Parameters for MODBUS-RTU mode: Command Reply Description CU5Annn &| Sets MODBUS address to nnn The address should range within 1 and 247 Default : 1 RU5A & nnn| Reads the MODBUS address setting CU5Bn &| Sets the Baud Rate for MODBUS mode to: ...
  • Page 25 Parameters for SDI-12 mode: Command Reply Description CU3Ac &| Sets the SDI-12 address to c value The address is an alphanumeric character ranging within 0…9, a…z, A…Z. Default : 0 RU3A & c| Reads the SDI-12 address set in the instru- ment General parameters: Command...
  • Page 26 Command Reply Description RWaM & n| Reads the method for the calculation of the average speed and average direction set in the instrument &| Enables/disables the compass compensation of wind speed and direction: note: command available  Disables if n=N ...
  • Page 27 If 539.9° value is exceeded in extended mode, the output goes to the value corresponding to 180°. The table below shows the correspondence between the value of the analog output and the di- rection of the wind in the two modes. 4…20mA output 0…1V output 0…5V output...
  • Page 28 Analog outputs: Command Reply Description CAFxnn &| Sets offset and direction of the analog output x (x=1 or 2) to: Standard if nn=00  [ex. 4…20 mA , 0...1 V , 0...5 V , 0...10 V]  Without offset if nn=01 [ex.
  • Page 29 Command Reply Description & n| Reads the value corresponding to the wind speed analog output full scale V COMPONENTS By selecting the U and V components, the speed value associated to the initial scale of the two analog outputs is equal to the opposite of the speed value associated to the full scale of the outputs.
  • Page 30: Proprietary Rs232 Mode

    7 PROPRIETARY RS232 MODE In proprietary RS232 mode, the instrument sends automatically the acquired measurements at regular intervals. The interval is factory-set to 1 second and is configurable from 1 to 3600 seconds. To change the interval, you should enter in configuration mode and send the com- mand CU2Rnnnn, where nnnn indicates the interval value in seconds (see chapter 6 “CON- FIGURATION”...
  • Page 31: Proprietary Rs485 Mode

    8 PROPRIETARY RS485 MODE In proprietary RS485 mode, the instrument sends the acquired measurements only if request- ed by the PC. To use this mode, you must connect to a RS485 or RS422 serial port. Communication parame- ters should be set in the PC or data logger as follows: ...
  • Page 32: Nmea Mode

    9 NMEA MODE NMEA protocol, mainly used in the nautical field and in satellite-based navigation systems, specifies that only one of the devices connected can send data, while the others can only act as recipients. In NMEA mode, the instrument sends automatically the acquired measurements at regular in- tervals.
  • Page 33 If the instrument model is not equipped to measure some of the quantities indicated in the general format, the relevant fields will be empty and multiple consecutive commas will appear to indicate the missing fields. The previous string doesn’t include the measurement of solar radiation or amount of rainfall. Models equipped with a pyranometer or a rain gauge provide to send the measurement with a second string continuously alternating to the former: $IIXDR,a,x.x,a,c--c*hh<CR><LF>...
  • Page 34: Modbus-Rtu Mode

    10 MODBUS-RTU MODE In MODBUS-RTU mode, the instrument sends the acquired measurements only if specifically requested by the PC, PLC or data logger. The mode is available with RS232, RS485 and RS422 serial connections. Communication parameters should be set in the PC or data logger as follows: ...
  • Page 35 Register From FW Quantity Format Note number version Status register unsigned 16 bits 2.00 bit0=1  speed measurement error bit1=1  compass measurement error bit2=1  temperature meas. error bit3=1  humidity measurement error bit4=1  pressure measurement error bit5=1  solar rad. measurement error Wind speed unit of measurement unsigned 16 bits 2.00...
  • Page 36 (function 07h) INSTRUMENT ERROR CONDITIONS The Modbus function code 07h allows reading the 8-bit register containing information about error conditions of the instrument. Each register bit corresponds to an error condition:  Bit 0: Wind speed measurement error;  Bit 1: Compass measurement error; ...
  • Page 37: Sdi-12 Mode

    11 SDI-12 MODE In SDI-12 mode, the instrument sends the acquired measurements only if specifically request- ed by the PC. To use this mode, an SDI-12 serial connection should be performed. The communication pa- rameters of the protocol are:  Baud rate: 1200 ...
  • Page 38 Command Instrument reply Description aAb! b<CR><LF> Change of instrument address. where: Note: if character b is not an acceptable address, b = new the instrument answers with a in the place of b. address a<CR><LF> Request for instrument address. If more than a sensor is connected to the bus, a conflict will occur.
  • Page 39 Command Instrument reply Description As to the quantities with configurable measuring unit (wind speed, temperature, barometric pres- sure and rainfall), the measurement value is ex- pressed in the unit set in the instrument. <DP> measurement has the same format as tem- perature.
  • Page 40: Instrument Storage

    12 INSTRUMENT STORAGE Instrument storage conditions:  Temperature: -40...+70 °C.  Humidity: less than 90 %RH no condensation.  In storing, avoid locations where:  There is a high humidity level.  The instrument is exposed to direct sunlight.  The instrument is exposed to a high temperature source. ...
  • Page 41: Order Codes

    14 ORDER CODES HD52.3D… 2-axis ultrasonic static anemometer for the measurement of wind speed and di- rection, U-V Cartesian components of wind speed, Wind Gust, relative humidity and temperature (optional), global solar radiation (optional), barometric pres- sure (optional) and rainfall (optional). The “rainfall” and “global solar radia- tion”...
  • Page 42 CP52.15 12-pole connecting cable with 19-pole M23 female free connector on one end, open wires on the other. Length 15 m. CP52.20 12-pole connecting cable with 19-pole M23 female free connector on one end, open wires on the other. Length 20 m. CP52.30 12-pole connecting cable with 19-pole M23 female free connector on one end, open wires on the other.
  • Page 44   G U A R A N T E E TERMS OF GUARANTEE All DELTA OHM instruments are subject to accurate testing, and are guaranteed for 24 months from the date of purchase. DELTA OHM will repair or replace free of charge the parts that, within the warranty period, shall be deemed non efficient according to its own judgement.
  • Page 45 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | info@deltaohm.com The quality level of our instruments is the result of the constant development of the product. This may produce some differences between the information written in this manual and the instrument you have purchased.
  • Page 46 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | info@deltaohm.com V2.2 11/11/2020...

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