Delta OHM HD2003 User Manual
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Delta OHM HD2003 User Manual

Three-axis ultrasonic anemometer
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HD2003-HD2003.1
Three-Axis Ultrasonic
Anemometer
User's Manual
Rev.2.0
February 2006
© 2006 Delta Ohm Srl, All Rights Reserved

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Summary of Contents for Delta OHM HD2003

  • Page 1 HD2003-HD2003.1 Three-Axis Ultrasonic Anemometer User’s Manual Rev.2.0 February 2006 © 2006 Delta Ohm Srl, All Rights Reserved...

  • Page 2: Table Of Contents

    1. Introduction 1.1. Conventions 1.2. Models 1.2.1. Heaters Option 1.3. Features 1.4. Operating Modes 1.5. Specifications 1.6. (HD2003 Model) Temperature – Relative Humidity - Pressure Sensors 2. Installation and Maintenance Packaging Mounting and Positioning Alignment Electrical Connections Power Supply and Earthing 2.4.1...

  • Page 3: Introduction

    The angle is calculated from 0° to 360° clockwise along the Horizontal Plane. The origin 0° is the direction of Geographical North. The HD2003 built-in integrated compass measures the magnetic azimuth , with reference to Magnetic North.

  • Page 4: Models

    When necessary, the difference between the two models is unequivocally underlined. 1.2.1 Heaters Option The HD2003 is guaranteed to function in temperatures as low as –20°C if ice or snow is absent, without any heating circuits for sonic transducers. Temperature conditions below –20°C, or temperatures around 0°C when snowing or ice possibly forms on the transducers, prevent the HD2003 from functioning correctly, making the use of the heaters option essential.

  • Page 5: Operating Modes

    Their activation is obtained via software (see Chap. 3.2.3.9) , subsequently switching the HD2003 off and on. It is always possible to return to RS232 Serial mode by providing a suitable command when switching the HD2003 on.

  • Page 6: Specifications

    Operation ensured up to 300mm/hr ♦ Humidity 0% ÷ 100% RH The HD2003 application fields are continuously developing, thus Delta Ohm reserves the right to change the above-mentioned specifications without prior notice. Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 7 Range: 600 ÷ 1100 mbar Resolution: 0.1 mbar Accuracy: ± 0.4 mbar @ 20 °C Temperature Effects: ± 0.8mbar between –40°C and +60°C Long-term stability: < 0.2% F.S. in 6 months @ 20 °C Delta Ohm – Caselle di Selvazzano (PD) ITALY...

  • Page 8: Installation And Maintenance

    (see Drawing DWG1HD2003 page 35) Orientation A. If the HD2003 is rotated on its vertical axis, it can be fixed in any other angular position. The HD2003 built-in magnetoresistive sensor allows to automatically refer angular measurements to Magnetic North, independently of its position.

  • Page 9: Electrical Connections

    The earth connection is fundamental to protect against electromagnetic disturbances. The HD2003 is installed on a metallic pole fixed to the ground that must be earthed. Connect the metallic structure of the pole to the earthing screw provided near the HD2003 connector (see Drawing DWG1HD2003 page 35) with a φ1.5 mm²...

  • Page 10: Rs232 Serial Communication Mode

    2.4.3 RS485 Multidrop Communication Mode. This mode can be selected via software (Chap. 3.2.3.9) Make a parallel connection between each HD2003 of the network and the RS485 port on the computer, (or the RS232/RS485 converter connected to the computer), by using a shielded twisted pair cable.

  • Page 11: Maintenance

    Rev.2.0 February 2006 Maintenance The HD2003 maintenance consists of periodic checks in order to: ♦ Find and possibly eliminate all deposits of ground, leaves or any other kind of debris that may accumulate on the sonic transducers. In highly polluted areas, remove all fouling deposits from the measuring elements such as sonic transducers, support rods, etc.

  • Page 12: Programming

    Connect power supply and RS232 as shown in Chapters 2.4.1 and 2.4.2. After the power supply of the instrument has been switched on, the HD2003 will enter the autoranging mode for a few seconds and then it will work in Measuring mode and automatically supply the Output Data which can be displayed on Hyper Terminal ®.

  • Page 13: Rs232 Serial Mode Examples

    HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006 3.2.2.1 RS232 Serial Mode Examples Delta Ohm – Caselle di Selvazzano (PD) ITALY...

  • Page 14: Setup

    Hyper Terminal® or DeltaMet8u®. When opening a Menu that allows the selection between different values/options, or a Menu that allows to set up a numeric value, the value/option correctly stored by the HD2003 and preceded by a “=” sign, is always highlighted.

  • Page 15: Baud Rate

    (=19200 Factory Default). When baud rate changes, the Hyper Terminal® Port Setup is to be modified by inserting the new baud rate in the Bit per second item. It remains active in the HD2003 even when passing to Multidrop RS485 mode.
  • Page 16 It allows to set a gain factor in 1/10000 for U–V–W components and consequently for SoW and SUV components (=10000 Factory Default). This gain variation allows to align the wind speeds measured by the HD2003 with the wind speeds measured by any other reference instrument.

  • Page 17: Analog Output Format

    Humidity). In substance, all quantities chosen as Output Data in RS232 or RS485 as well as those chosen as Analog Outputs, are supplied by the HD2003 with values that represent the average calculated on the last time interval. The magnetic azimuth provided by the compass is excluded from moving averages.
  • Page 18 Outputs combined with the U component of wind speed (Chap. 3.2.3.6), the reciprocity scale is established between the voltage of the relevant Analog Output and the meters per seconds of U component: - 45m/s -> 1Vdc +45 m/s -> 5Vdc Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 19 The string of desired output quantities is established by typing in the desired order, the corresponding alphanumeric characters which appear on Menu (= st012c5789e Factory Default). The string may consist of 11 alphanumeric characters at most. Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 20 For output quantities format in RS232 Serial mode see Chapter 3.2.2 Measuring mode. For RS485 Multidrop mode see Chapter 3.3.2 HD2003 Communication Protocol. Output quantities will be available in the digital Output Data in the same order as they have been chosen in the string.

  • Page 21: Unit Of Measurement

    (On request) Additional output quantities (see figure Chap. 3.2.2.1): (HD2003 Model). When you place your order, you can combine the two optional quantities q3 and q4, with two 0-1V external sensors. Thus, two additional measurements are added to the output quantities already available in the HD2003.

  • Page 22: Sonic Transducer Heating

    The one referring to tens, identifies the sonic transducers with possible anomaly. Sonic transducers are grouped in pairs of facing elements. For the first pair, the upper transducer is next to the HD2003 metallic support which indicates the North direction. The other pairs follow anti-clockwise.
  • Page 23 3.2.3.8 Sonic Transducer Heating This function is provided on request, and refers just to HD2003.R and HD2003.1R models supplied with sonic transducer heating circuit. The climatic conditions which make it necessary to use the heaters option are indicated in Chapter 1.2.1.

  • Page 24: Rs232 Serial Or Rs485 Multidrop Communication Mode

    Whatever the stored communication mode, you can always set RS232 serial mode when switching the HD2003 on. You can just make a RS232 Serial connection (Chap. 2.4.2) and by pressing the keyboard of the Host computer when switching the HD2003 on, RS232 Serial mode is established during auto ranging (which takes a few seconds), even though for example RS485 Multidrop mode was previously stored.

  • Page 25: Output Rate And Digital High Frequency

    The set frequency is independent of the Internal Refresh of the instrument (see Chapter 3.2.3.4). • By typing 2: (Fast): Digital High Frequency mode is activated, and on the lower screen side appears: =Fast Digital Sel: Delta Ohm – Caselle di Selvazzano (PD) ITALY...

  • Page 26: Logging

    Here are summarized the values set by the factory calibration, as well as the current configuration of the main parameters that can be managed by the user in Setup. Press any key to go back to the Main Menu. Delta Ohm – Caselle di Selvazzano (PD) ITALY...

  • Page 27: Rs485 Multidrop Communication Mode

    RS232 Serial Communication mode, (see Chapters 2.4.1 and 2.4.2 for electrical connections). The baud rate, the same for all the HD2003 units in the network, is selected following the Chapter 3.2.3.1 instructions. The identicode must be different for each HD2003 unit in the network, and it’s selected following the Chapter 3.2.3.10 instructions.
  • Page 28 Connect the Anemometers in the RS485 Multidrop network and set electrical connections as illustrated in Chapters 2.4.1 and 2.4.3. After the power is supplied, each HD2003 unit (Slave) will work on Stand by continuing to execute its normal measurement cycle, waiting for commands from the Computer Host (Master).

  • Page 29: S Command (Setup

    The RS485 communication program after sending the command: S<ID><x><x> according to the modes illustrated in Chapter 3.3.2, sets the queried HD2003 unit in Setup, and receives the Main Menu page from it (see Chapter 3.2.3). In substance, the RS485 communication program can manage the Setup of the HD2003 queried unit on the RS485 Multidrop line, in the same modes shown for the RS232 Serial Communication.

  • Page 30: M Command (Output Data

    Chapter 3.3.2, will receive Output Data from the queried HD2003 unit, in a proper format. ♦ The Output Data received, will correspond to the last measurement carried out by the HD2003 unit, concerning the set average interval in the Setup (see Chapter 3.2.3.4).

  • Page 31: H Command (Digital High Frequency Enable ) And

    The Digital High Frequency is automatically disabled when switching the HD2003 on again. The RS485 communication program after sending the command: L<ID><x><x> according to the modes illustrated in Chapter 3.3.2, sets the HD2003 in the normal Output Data emission mode, and disables the Digital High Frequency mode. 3.4 Analog Output Mode.

  • Page 32: Analog Output Mode Examples

    HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006 3.4.1 Analog Output Mode Examples Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 33 HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006 Fig.1 - HD2003 Connector Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 34 OUTmA1 Analog Out current 1 OUTmA2 Analog Out current 2 OUTmA3 Analog Out current 3 OUTmA4 Analog Out current 4 OUTmA5 Analog Out current 5 Reserved Reserved Reserved Reserved Reserved SHIELD Shielding Delta Ohm – Caselle di Selvazzano (PD) ITALY...

  • Page 35: How To Order

    (for plug pin, see Fig.1 – HD2003 Connector) Besides, please specify if you want: • HD2003 Model: additional output quantities to be used, through external sensors with analog output signal 0-1V. You are kindly required to specify the number of sensors to be used (up to two) and their engineering range to be linearized on the 0-1V scale.
  • Page 36 HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006 Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 37 HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006 Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 38 HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006 Delta Ohm – Caselle di Selvazzano (PD) ITALY...
  • Page 39 Nome Prodotto: Product Name: DELTA OHM SRL 35030 Caselle di Selvazzano (PD) Italy Via Marconi, 5 Tel. +39.0498977150 r.a. - Telefax +39.049635596 Cod. Fisc./P.Iva IT03363960281 N.Mecc. PD044279 R.E.A. 306030 ISC. Reg. Soc. 68037/1998 Delta Ohm – Caselle di Selvazzano (PD) ITALY...

  • Page 40: Serial Number

    All DELTA OHM instruments have been subjected to strict tests and are guaranteed for 24 months from date of purchase. DELTA OHM will repair or replace free of charge any parts which it considers to be inefficient within the guarantee period. Complete replacement is excluded and no request of damages are recognized.

This manual is also suitable for:

Hd2003.1

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