GHM DeltaOHM HD52.3D Series Operating Manual

GHM DeltaOHM HD52.3D Series Operating Manual

Ultrasonic anemometers

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English
Operating manual
Ultrasonic anemometers
HD52.3D... series
www.deltaohm.com
Keep for future reference.

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Summary of Contents for GHM DeltaOHM HD52.3D Series

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

    TABLE OF CONTENTS INTRODUCTION ....................3 ......................4 ODELS TECHNICAL SPECIFICATIONS ................5 DESCRIPTION ....................... 8 MEASURING PRINCIPLE OF WIND SPEED AND DIRECTION ........ 10 INSTALLATION ....................11 ................12 LIGNMENT OF THE INSTRUMENT HD52.3DT147 ........13 SSEMBLING RAIN GAUGE FILTER AND FUNNEL IN ...................
  • 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: Models

    ODELS The table below shows the optional features in the various models of the series. OPTIONS Global Atm. R.H. Bird Powder Analog Model solar Rainfall Heating press. Temp. spikes coating outputs rad. HD52.3D[K][R][W][V…] Option √ HD52.3D[K]4[R][W][V…] √ HD52.3DP[R][W][V…] N.A. 4…20 mA if √...
  • 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 General features Power Supply 10…30 Vdc Power consumption 26 mA @ 24 Vdc without heater 8 W @ 24 Vdc with heater Serial outputs RS232, RS485 (¼ Unit Load), RS422 and SDI-12 Communication protocols NMEA, MODBUS-RTU, SDI-12, proprietary RS232 and RS485 Analog outputs 2 analog outputs, for wind speed and direction.
  • Page 7 Mast Mast HD52.3D / HD52.3D4 HD52.3DP / HD52.3DP4 40 ext. Mast 36 int. HD52.3DT147 HD52.3D… V3.0...
  • 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… V3.0...
  • 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 recommended 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: Assembling Rain Gauge Filter And Funnel In Hd52.3Dt147

    When evaluating the wind direction, one should consider that the geographic North differs from the magnetic North indicated by the compass. The difference, named magnetic declination, depends on the area where the instrument was installed (for example, about 15° in North America and less than 3°...
  • Page 14: Lectrical Onnections

    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

    5.3.1 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

    5.3.4 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: Usb Connection Via The Rs52 Cable (Rs232/Usb)

    5.3.6 USB RS52 (RS232/USB) CONNECTION VIA THE CABLE The instrument RS232 serial port can be connected to a PC USB port via the optional RS52 adapting cable, with built-in RS232/USB converter. Reference of female RS52 connector solder side RS232/USB adapter Lmax = 15m To PC To use the RS52 cable, the drivers included in the HD52.3D-S software package, down-...
  • Page 19: Connection Of Heating System

    5.3.8 C ONNECTION OF HEATING SYSTEM Models with heat option (R option) have an integrated device that heats sonic transducers in order to prevent ice forming and ensure correct operation even in the presence of snow. The heater power supply is separated from the instrument’s main power supply. Heater power supply Reference of female...
  • Page 20: Configuration

    6 CONFIGURATION Configuration mode allows reading the instrument general info (firmware version, serial num- ber, …) and setting the instrument operating mode and operating parameters. The configura- tion of the instrument can be done: • With the aid of HD52.3D-S application software (see the software online help), down- loadable from Delta OHM website.
  • Page 21: Serial Commands

    ERIAL OMMANDS Instrument information Command Reply Description &Vnn.nn yyyy/mm/dd| Version and date of firmware &yyyy/mm/dd hh.mm.ss| Date and time of calibration &nnnnnnnn| Serial number of instrument &ccc…ccc| User code CGIccc…ccc &| Sets user code to ccc…ccc (max. 34 characters) Operating Mode: Command Reply Description...
  • Page 22 Disabling the 10-second wait for the @ command at power up, and therefore the immediate activation of the set mode, is only possible if the instrument is set in configuration or MOD- BUS-RTU mode; the disabling command has no effect if the instrument is set in other modes, because sending the @ command at power up is the only way to access the configuration (in MODBUS-RTU it is instead possible to access the configuration via the holding register 10000).
  • 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 Enabling/disabling the heating: Command...
  • Page 26 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 Enables if n=Y from firmware version 2.06 Default : Enabled (n=Y) CRTnnnn &|...
  • 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 CAF1nn &| Sets offset and direction of the analog outputs Standard if nn=00  [ex. 4…20 mA , 0...1 V , 0...5 V , 0...10 V]  Without offset if nn=01 [ex. 0…20 mA]  With offset if nn=02 [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: Rs232 And Rs485 Ascii Proprietary Modes

    7 RS232 AND RS485 ASCII PROPRIETARY MODES In RS232 and RS485 proprietary modes, the instrument automatically sends a string with the detected measurements every second, via RS232 or RS485 depending on the set proprietary mode. Communication parameters should be set in your PC as follows: •...
  • Page 31: Nmea Mode

    8 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 32 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 33: Modbus-Rtu Mode

    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 34 From FW Address Description Format Note version Wind speed unit of measurement unsigned 16 bits 2.00 0  m/s 3  knot 1  cm/s 4  mph 2  km/h Temperature unit of measurement unsigned 16 bits 2.00 0  °C 1 ...
  • Page 35 From FW Address Description Format Note version Waiting time after transmission in unsigned 16 bits 2.26 MODBUS mode: 0= Immediate reception (violates pro- tocol); 1= Waiting 3.5 characters (respects protocol, default). MODBUS parity and stop bits: unsigned 16 bits 2.26 0=8N1;...
  • Page 36 From FW Address Description Format Note version 30001 Starts the instrument firmware update. unsigned 16 bits 2.26 By writing 0x69A5 (=27045) in this register, the instrument suspends the MODBUS protocol and waits to receive the firmware update file, via XModem or HD52.3D-S software, on the serial interface set for configuration mode (see HD52.3D-S software: “Instrument...
  • Page 37: Sdi-12 Mode

    10 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 Type M (start measurement) commands Command Reply Description Wind speed and direction, temperature, relative and absolute humidity, dew point, barometric pressure, solar radiation and compass angle atttn<CR><LF> Request to detect the measurements. where: a = address of the instrument (1 character) ttt = number of seconds needed by the instrument to make measurements available (3 characters) n = number of detected quantities (1 character)
  • Page 39 Type R (continuous measurements) commands Command Reply Description aR0! a<WS><WD><T><CR><LF> Request for measured values. aR1! a<RH><AH><DP><CR><LF> aR2! a<P><R><C><CR><LF> aR3! a<WSa><WDa><CR><LF> aR4! a<WGS><WGD><CR><LF> aR5! a<TBT><TBL><RR><CR><LF> where: a = address of the instrument <WS> = wind speed <WD> = wind direction in degrees <T>...
  • Page 40: Instrument Storage

    11 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: Accessories Ordering Codes

    13 ACCESSORIES ORDERING CODES CP52… Connecting cable with 19-pole M23 female free connector on one end, open wires on the other. Available lengths: 5 m (CP52.5) and 10 m (CP52.10). Serial connection cable with built-in USB/RS232 converter. USB connector for RS52 the PC and screw terminals on the instrument side.
  • Page 42 OTES HD52.3D… V3.0...
  • Page 44 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 | sales@deltaohm.com WARRANTY Delta OHM is required to respond to the "factory warranty" only in those cases provided by Legislative Decree 6 September 2005 - n.

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