Delta OHM HD2003 User manual

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

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 1
INDEX
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
2.1 Packaging
2.2 Mounting and Positioning
2.3 Alignment
2.4 Electrical Connections
2.4.1 Power Supply and Earthing
2.4.2 RS232 Serial Communication Mode
2.4.3 RS485 Multidrop Communication Mode
2.4.4 Analog Output Mode
2.5 Maintenance
3. Programming
3.1. Introduction
3.2. RS232 Serial Communication Mode
3.2.1. Parameter Setup
3.2.2. Measuring mode
3.2.2.1. RS232 Serial Mode Examples
3.2.3. Setup
3.2.3.1. Baud rate
3.2.3.2. Gain
3.2.3.3. Minimum Threshold
3.2.3.4. Average Interval
3.2.3.5. Analog Output Format
3.2.3.6. Output Quantities
3.2.3.7. Unit of Measurement
3.2.3.8. Sonic Transducer Heating
3.2.3.9. RS232 Serial or RS485 Multidrop Communication Mode
3.2.3.10. Identicode
3.2.3.11. Output Rate and Digital High Frequency
3.2.4. Logging
3.3. RS485 Multidrop Communication Mode
3.3.1. Parameter Setup
3.3.2. HD2003 Communication Protocol
3.3.2.1. S Command (Setup)
3.3.2.2. M Command (Output Data)
3.3.2.3. H Command (Digital High Frequency enable ) and
L Command (Digital High Frequency disable )
3.4. Analog Output Mode
3.4.1. Analog Output Mode Examples
4. How to Order
4.1 Order codes

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 2
1. Introduction
Ultrasonic Anemometers allow to detect surface wind speed and direction.
These instruments measure the transit time of the ultrasonic pulse between a pair of opposite sonic
transducers, in both directions. From the measurement of tA and tR times, you can trace to the wind
speed component in the direction of the two transducers, through the formula:
V = D/2 · (1/tA – 1/tR)
Where:
D = distance between two transducers. tA = forward transit time tR = backward transit time
This formula ensures that the wind speed does not depend on Pressure, Temperature and Humidity.
Three couples of transducers allow to make a three-axis vector measurement of wind.
1.1 Conventions
♦Definitions of the anemometric quantities measured by the HD2003.
The wind direction is established through the calculation of angles:
azimuth.
The azimuth is the angle that defines the position of the wind flow along the Horizontal Plane,
with reference to the direction from which the wind itself is coming. 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.
elevation.
This is the angle that defines the position of the wind flow along the Vertical Plane.
It varies from +/-60° along the Vertical Plane: positive inclinations are those over the Horizontal
Plane while the negative ones are those under it.
The wind speed is calculated in terms of intensity of components or resultants:
SoW, SUV and SoS.
The intensity of wind speed is indicated by SoW, that of its component along the Horizontal
Plane U-V is indicated by SUV, while that of sound by SoS.
U-V-W.
These are the three Cartesian components of wind speed.
If we draw a Cartesian plane with U and V along the Horizontal Plane, W will be the Vertical
Axis. The “V” direction coincides with Geographical North and, consequently, the “U” will
coincide with East and the “W” with the vertical.
♦Other conventions
F.S. and Zero.
F.S. identifies the Full Scale of a quantity, while Zero identifies the Scale Minimum Value.
Factory Default.
The Factory Default corresponds to the value of a factory set parameter, when first programming
an instrument which comes out of the production department.
Internal Refresh.
It represents the automatic frequency by which all the calculations are refreshed according to the
set average intervals.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 3
Symbols.
The keys of an IBM compatible PC keyboard are identified with a white text on a black
background, for example:
[Esc] = Esc key, [Enter] = Enter key, [A] = A key
One ASCII generic character, or several ASCII generic characters can be identified with the
symbol: <name> , where name is any expression that gives the title to that character.
Example of peculiar characters:
<CR> = Carriage Return <LF> = Line Feed
Output Data.
It is the digital string of all formatted measuring data available for RS232 and RS485 Serial
communication interfaces.
1.2 Models
The code HD2003 mentioned in this manual refers to both models:
HD2003
HD2003.1
They represent the same kind of Anemometer, except for the fact that the HD2003 has the
following built-in sensors: Temperature, Relative Humidity and Pressure, in order to measure
these additional output quantities.
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.
The heating circuit intervenes at temperatures below +5°C, with a minimum additional power of
4W (with temperature no lower than –10°C), preventing the formation of ice, and ensuring that the
HD2003 functions correctly even during sleet or snow.
The models equipped with the heaters option are named with the additional letter R:
HD2003R
HD2003.1R
1.3 Features
The HD2003 main features are:
♦Determination of anemometric quantities with different units of measurement:
wind speed and direction, U-V-W Cartesian components, sonic temperature and speed.
♦(HD2003 Model) Additional quantities measured: Temperature, Relative Humidity, Pressure.
♦5 analog outputs in current or voltage, with different ranges.
♦Digital communication interfaces: RS232 Serial and RS485 Multidrop.
♦Digital strings of output data at a configurable emission frequency.
♦Average intervals for all output quantities, configurable at 1÷60 sec or at 1÷60 min.
♦Processing and validity Algorithms for raw measurement signals to provide the measurement of
the anemometric quantity with ±1% precision.
♦Acquisition mode in Digital High Frequency with data output at 50 Hz.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 4
♦Self-diagnosis with checking and error reporting.
♦Reliability and precision for the whole measurement field, without any need for further
calibrations.
♦Flexible and easy-to-use operating software which can be adapted to the customer’s
requirements through a computer interface.
♦Setup user interface and software upgrade via RS232 or RS485.
♦Compass with magnetoresistive sensor for automatic alignment to the Magnetic North.
♦No moving parts, with reduced maintenance and servicing costs.
♦Robust construction, apt to operate continuously in severe climatic conditions.
♦Low power consumption.
♦(On request) Heaters Option: Sonic transducers integrated heating device, to prevent ice and
snow formation, ensuring a correct functioning even when sleeting or snowing.
1.4 Operating Modes
The HD2003 has four operating modes:
♦RS232 Serial Communication Mode (Chap. 3.2)
A connection over a RS232 Serial line is established between a Host Computer and one HD2003
Anemometer. The Host Computer (Slave) is continuously receiving on its RS232 serial port, Output
Data digital strings, which are automatically supplied by HD2003 (Master), with its own frequency
(configurable at a cadence from 1 to 3600s).
In this mode the Setup user interface can be managed from the computer.
♦RS485 Multidrop Communication Mode (Chap. 3.3)
A RS485 Multidrop network can be established between a Host Computer and several HD2003
Anemometers (up to 32). The Host Computer (Master) sends a command to the univocal address of
a HD2003 (Slave). Only the Anemometer which is identified by that address answers on request,
giving the Output Data. In this mode the command to activate the Setup user interface is available.
♦Digital High Frequency Mode (Chap. 3.2.3.11 and Chap. 3.3.2.3)
When on RS232 Serial communication mode, the Digital High Frequency functioning can be set up,
obtaining the digital output in RS232 of quantities at a fixed frequency of 50 Hz, with a baud
rate=115200 and for 4 measurement quantities at most.
When on RS485 Multidrop communication mode, a command for activating the Digital High
frequency can be sent. Then, any command for requiring a measurement can be sent to the HD2003
up to a maximum frequency of 50 Hz, with a baud rate=115200 and for 4 measurement quantities at
most.
♦Analog Output Mode (Chap. 3.4)
All measurement quantities can be configured to be converted into 5 analog outputs in current or
voltage, available in different measurement ranges. This mode is always active, combined with the
RS232 Serial and RS485 Multidrop modes. When on Digital High Frequency mode, the 5 analog
outputs are still available with a refresh of 1Hz.
The RS232 Serial and RS485 Multidrop Communication modes are alternative: only one of
them can be active. 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.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 5
1.5 Specifications
Output quantities
Anemometric wind direction and speed, U-V-W components, sound speed, sonic temperature
Meteorological (HD2003 Model) Pressure, Temperature, Relative Humidity
Heading Compass with magnetic azimuth
¾Wind Speed
Unit of measurement m/s, cm/s, km/h, knots, mph
Range 0 ÷ 60 m/s (216 km/h)
Resolution 0.01 m/s
Accuracy ±1% of reading
¾Wind Direction
Range Azimuth: 0 ÷ 360° Elevation: ±60°
Resolution 0.1 °
Accuracy ±1 °
¾Sound Speed
Range 300 ÷ 380 m/s
Resolution 0.01 m/s
Accuracy ±1% of reading
¾Sonic Temperature
Range -40 +60°C
Resolution 0.1 °C
Accuracy ±1 °C
¾Compass
Range 0÷360°
Resolution 0.1°
Accuracy ± 1°
¾Moving Averages 1÷60 sec / 1÷60 min
¾Ultrasonic rate 60Hz
Digital Outputs
¾Quantities Anemometric output quantities and compass
(HD2003 Model) Pressure, Temperature, Relative Humidity
¾Communications RS232 full duplex, RS485 Multidrop half duplex
¾Baud rate 9600 ÷ 115200 bit/sec
¾Output Rate Normal mode (Slow): 1 ÷ 3600 sec
Digital High Frequency (Fast) : fixed 1/50s
Analog Outputs
¾Quantities 5 to be selected from all the output quantities available (anemometric, compass, meteo)
¾Range 0-20 mA, 4-20 mA, 0÷1V, 0÷5V, 0÷10V, 1÷5V
¾Resolution 14 bits max
Power Supply
¾Range 12 ÷ 30 Vdc
¾Power < 2W (Typically: 110mA @ 15Vdc)
< 6W Models with heaters and environment temperature not lower than –10 °C
Heaters Option(On request when placing the order).
Heating with automatic temperature control on sonic transducers, to prevent ice and snow formation and ensure a correct functioning
even when sleeting or snowing.
Weight.
♦HD2003 : 2.1 Kg.
♦HD2003.1 : 1.5 Kg.
Environmental Conditions.
♦Temperature Range -40 +60 °C
♦EMC CE Regulations
♦Precipitation 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.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 6
1.6 Temperature – Relative Humidity – Pressure Sensors
(HD2003 Model)
Temperature.
Sensor: Pt100
Analog Output: 0-20 mA, 4-20 mA, 0÷1V, 0÷5V, 0÷10V, 1÷5V
Range : –40 + 60 °C
Resolution: 0.1 °C
Accuracy: ± 0.2 °C, ± 0.15% of reading
Relative Humidity.
Capacity sensor: H6100
Analog Output (0 %÷100 % RH): 0-20 mA, 4-20mA, 0÷1V, 0÷5V, 0÷10V, 1÷5V
Range: 5÷98% RH
Resolution: 0.1 %
Accuracy: ± 2.5% RH @ 23°C
Pressure.
Piezo resistive Sensor.
Analog Output: 0-20 mA, 4-20mA, 0÷1V, 0÷5V, 0÷10V, 1÷5V
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

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 7
2. Installation and Maintenance.
2.1 Packaging
In order to avoid damage due to transport, the HD2003 Anemometer is supplied fixed in a special
container. Carefully remove the Anemometer from its container and save this one, for any future
packaging and transport.
The warranty does not cover the instrument if, in further shipments, containers other than the one
supplied are used, or if the HD2003 is not fixed inside it.
2.2 Mounting and Positioning
The instrument will be vertically mounted and positioned on “open terrain”, far from turbulences
due to near trees or buildings.
In the presence of buildings, trees or any other obstruction, the HD2003 should be positioned at a
height of 10 meters above the ground; the distance between the instrument and any obstruction
should be at least 10 times the relevant height.
2.3 Alignment
(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.
Orientation B.
The HD2003 is connected to a computer in RS232 Serial or RS485 Multidrop communication mode
(Chap. 3.2 and Chap. 3.3). Then the HD2003 is rotated on its vertical axis until the measurement
of the compass shows 0.0° +/- 0.1° on the serial communication program of the computer.
This ‘Orientation B’ ensures greater precision in angular measurements and U-V-W Cartesian
components of wind speed correspond to cardinal points:
V direction= North
U direction = East
W direction = Instrument Vertical Axis.
In order to refer angular measurements to Geographical North, you should consider the Magnetic
Declination error, which is to be algebraically summed to Magnetic North.
Once the alignment is finished, tighten the clamp which fixes the Anemometer to the mounting
mast.
With strong magnetic fields, (for example radio or telephone antennas are in the same installation),
the automatic calculation of the azimuth angle, may be independent from the compass meaurement.
In order to do it, make an RS232 serial connection (Chapter 2.4.2), and if you press # on the
keyboard of the Host computer, when turning the HD2003 on, ( autoranging takes a few seconds),
you set it up to work with manual North orientation.
To align the instrument, rotate the HD2003 on its vertical axis, so the Geographical North
corresponds to the north side of HD2003, which is identified by the direction of the metal support
opposite the connector (see Orientation B, Drawing DWGHD2003 page 35).

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 8
2.4 Electrical Connections
Electrical connections to the HD2003 are made with its 26 pole connector.
Each pin of the connector, is marked with an identity label and a mnemonic symbol.
See Fig. 1 – HD2003 Connector, for references to connector labels and symbols.
(On request) Multipolar cable: the HD2003 may be supplied with a cable and plug.
The cable may be 5 meters or 10 meters length.
2.4.1 Power Supply and Earthing
♦Power supply: 12÷30 Vdc
110mA @ 15Vdc: without Heaters Option
400mA @ 15Vdc and –10°C: with Heaters Option (heating circuit activated)
Power Supply
12÷30 Vdc
HD2003 Connector / Symbol
pole ¬G / PWR+
pole ¬K / PWR+
pole −H / PWR-
pole −J / PWR-
Note for the model with Heaters Option:
When the HD2003 has remained off in temperatures below 0°C, being switched on later will
give initial absorption peaks when the heating circuit turns on. These peaks should be planned
when dimensioning the power supply circuit used (ex: from 5A to 1A first 5sec @ 15Vdc and –
20°C).
♦Earth Connection.
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 cable.
A B
The Aconnection was made by using a screw on the support pole, while the B connection was
made by using a clamp around the support pole.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 9
2.4.2 RS232 Serial Communication Mode.
This mode can be selected via software (Chap. 3.2.3.9)
Connect the HD2003 cable to a computer’s serial port.
If necessary, use a pin to pin extension with a shielded cable.
The possible extension cable plus the HD2003 cable cannot exceed 15 meters.
(Chap. 3.2.2.1).
♦RS232 connections
RS232Port (computer side)
9 pole Cannon connector
HD2003 Connector / Symbol
pin#2 Y / TXD
pin#3 L / RXD
pin#5 X / SG
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.
The maximum cable length between the Anemometers placed in the extreme places of the
Multidrop RS485 network is 1,200m (Chap. 3.3.1)
♦RS485 Multidrop connections
RS485 Port (computer side) HD2003 Connector / Symbol
pole B F / DATA +
for all the HD2003 of the network
pole A W / DATA -
for all the HD2003 of the network
2.4.4 Analog Output Mode.
( see Chap. 3.4.1)
♦5 Analog Outputs at 14 bits in voltage, 0 ÷ 1V, 0 ÷ 5V, 0 ÷10V ,1 ÷ 5V
Analog Outputs of voltage HD2003 Connector/ Symbol
#1 E / OUTV1
#2 V / OUTV2
#3 c / OUTV3
#4 Z / OUTV4
#5 M / OUTV5
Analog ground of voltage D / REF
♦5 Analog Outputs at 14 bits in current, 0-20mA, 4-20mA
Analog Outputs of current HD2003 Connector/ Symbol
#1 U / OUTmA1
#2 b / OUTmA2
#3 a / OUTmA3
#4 N / OUTmA4
#5 C / OUTmA5
Analog ground of current J / PWR−

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 10
2.5 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.
♦Check and possibly restore the integrity of the connector seal.
♦Check and repair any damage caused by third parties.
♦Check and possibly restore the correct power supply level, especially in case of supply provided
by accumulators or solar panels.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 11
3. Programming
3.1 Introduction
RS232 Serial and RS485 Multidrop Communication modes are selected via software, as shown in
Chapter 3.2.3.9.
The Setup user interface is available in both modes.
3.2 RS232 Serial Communication Mode
3.2.1 Parameter Setup
From the Host Computer, open a serial communication program such as Hyper Terminal® or
DeltaMet8u® .
By using Hyper Terminal® , select and set up the following Menus:
•Port Configuration:
Bit per second
Data bit
Parity
Stop bit
Flow Control
HD2003 baud rate (19200 Factory Default, see Chapter 3.2.3.1)
8
None
2
None
•Settings / Terminal Setup / Rows:
Set the number of rows at 24.
•Settings / ASCII Setup:
Select ‘Echo typed characters locally’.
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 ®.
On the computer keyboard, press the character ?to enter Setup mode.
3.2.2 Measuring mode
While in Measuring mode, the HD2003 Anemometer transmits the digital strings of Output Data,
each one in a separate line of ASCII characters which correspond to the last measurement, at an
emission frequency and an average interval which may be configured in the Setup (Chap. 3.2.3).
The quantities to be represented in Output Data are selected in Setup mode, up to 15.
Each quantity’s measured value is formatted into 8 ASCII characters, right justified, with the space
character before the sign and a number of decimal positions depending on the unit of measurement.
Each string of data is followed by <CR> + <LF> characters.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 12
3.2.2.1 RS232 Serial Mode Examples

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 13
3.2.3 Setup.
The setup allows the user to configure and parameterise the Anemometer according to his needs
through linked Menus, displayed in succeding pages through a serial communication program, such
as 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.
Each single change of a parameter operated by the user determines a permanent storage of the new
parameter value, still valid even after the power supply of the HD2003 has been switched off.
In any configuration page which is visualized, a timeout becomes active after a previously set
period: unless a key is pressed on the Host Computer keyboard, the HD2003 returns to previous
pages until Measuring Mode. By consecutively pressing up to 5 characters that are not available on
the current Menu of the page used, you get the same result.
The Main Menu displayed through Hyper Terminal® or DeltaMet8u®, is the following:
DeltaOHM
Anemometer HD2003 Rel.2.0
→→ Menu
S. Setup
L. Logging
Esc. Exit
Sel:
Press [Esc] to go back to Measuring Mode (see Chapter 3.2.2).
Type Sto enter the Setup Menu.
Type L to display the Logging (see Chapter 3.2.4).

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 14
Setup Menu.
The screen page displays:
→→ Setup
1. Baud To select the RS232 or RS485 communication baud rate
2. Gain To set the gain factor for U-V-W, SoW and SUV
3. Threshold To set the minimum threshold for SoW
4. Average Interval To set the average interval in seconds or minutes for all output quantities
5. Analog Output To select the analog range and wind speed range for Analog Outputs
6. Output Quantity To select output quantities in RS232 Serial, RS485 Multidrop and Analog Output mode
7. Wind Units To select the unit of measurement of SoW, SoS, U-V-W and SUV
8. Heating (On request) To enable the heating circuit of sonic transducers
9. COM Mode To select RS232 Serial or RS485 Multidrop communication mode
I. ID To set the instrument identicode for RS485 Multidrop mode
R. Output Rate To set Digital High/Low Frequency of output quantity transmission in RS232 and RS485
Esc. Exit
Sel:
Type the alphanumeric character next to each Menu item, in order to activate the corresponding
submenu.
3.2.3.1 Baud rate
Typed Character: 1
(Baud)
How to set RS232 and RS485 baud rate. The screen page displays:
→→ Baudrate(N,8,2)
1. 9600
2. 19200
3. 38400
4. 57600
5. 115200
Esc. Exit
Enter. Save
= 19200
Sel:
By typing a number displayed among the Menu items, the relevant baud rate will appear.
For example, by typing 5, =115200 will appear.
After selecting the desired baud rate number, press [ENTER] to enable the Anemometer at the new
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.
Note: Press any key in order to get a new screen page.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 15
3.2.3.2 Gain
Typed Character: 2
(Gain)
How to set the gain factor.
The screen page displays:
Sel: 2
= 10000
Gain [Range= 5000 to 15000]:
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.
To set the desired gain , type it and then press [ENTER]; make sure that the number is within the
5000÷15000 range.
3.2.3.3 Minimum Threshold
Typed Character: 3
(Threshold)
How to set the Minimum Threshold displayed.
Screen page:
Sel: 3
= 20
[cm/s] [Range= 0 to 500]:
It is possible to set a minimum threshold of speed in cm/s, below which SoW is considered equal to
zero.
Type the digits of the desired value and then press [ENTER], according to the 0÷500 range.
3.2.3.4 Average Interval
Typed Character: 4
(Average Interval)
How to set the interval value in seconds or minutes in order to calculate the moving averages of all
output quantities.
The first screen page displays:
→→ Average Interval
1. [sec]
2. [min]
Esc. Exit
= [min]
Sel:

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 16
The time unit of the moving average interval can be chosen, in seconds or minutes
(=[min] Factory Default). After typing the number corresponding to the desired unit, the following
screen page will appear:
… if you choose seconds:
→→ Average Interval
= 2
[sec] [Range= 1 to 60]:
… if you choose minutes:
→→ Average Interval
= 2
[min] [Range= 1 to 60]:
The interval value should be set between 1 and 60 (=2 Factory Default) for calculating the moving
average. The moving average is the average calculated by the samples acquiring in the last time
interval, equivalent to the set period in seconds or minutes. Averages can be calculated over a
period from 1 to 60 seconds, or from 1 to 60 minutes. The moving average is calculated on the U-
V-W and SoS components (and consequently on all the other anemometric quantities resulting from
them), and for all the remaining output quantities ( HD2003 Model: Pressure, Temperature, Relative
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.
Type the digits of the desired number according to the range displayed on the screen and then press
[ENTER].
After choosing the average interval, the instrument automatically sets its Internal Refresh
(Chap. 1.1). The Internal Refresh is equal to 1s if you choose the interval in seconds; if you choose
it in minutes, it is equal to as many seconds as the minutes chosen.
(for example, an average interval of 10min corresponds to an Internal Refresh each 10sec).
3.2.3.5 Analog Output Format
Typed Character: 5
(Analog Output)
How to select the analog range and the wind speeds range for Analog Outputs.
Screen page:
→→ Analog Output
1. mA-V Ranges
2. Speed Ranges
Esc. Exit
Sel:

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 17
♦By typing 1
(mA-V Ranges) :
How to select the analog range. The screen page displays:
→→ Ranges
1. 0-20 mA
2. 4-20 mA
3. 0-1 V
4. 0-5 V
5. 0-10 V
6. 1-5 V
Esc. Exit
Enter. Save
= 3
Sel:
After selecting the number from Menu items which corresponds to the desired analog range, press
[ENTER to enable the five Anemometer Analog Outputs to provide a voltage/current signal in the
selected range (=0-1V Factory Default).
For instance, if you type 2, i.e. you choose 4-20mA range, and one of the Analog Outputs is
combined with azimuth 0-360° (Chap. 3.2.3.6), the reciprocity scale is established between current
available as Analog Output and engineering values referring to the azimuth:
0° -> 4mA
360° -> 20mA
♦By typing 2
(Speed Ranges) :
How to set the engineering range for wind speeds available for Analog Outputs.
The following screen page for range setup appears:
Sel: 2
= +/- 60 m/s (U, V, W)
= 0 to 60 m/s (SoW, SUV)
F.S. [Range= 10 to 60]:
Set a positive number in m/s between 10 and 60, which represents the F.S. on the scale of
measurement for SoW and SUV starting from zero; it also represents the extreme limits on the
symmetrical scale of measurement for U,V,W components.
Type the digits of the desired number according to the range displayed on the screen
(= 60m/s Factory Default) and then press [ENTER].
For instance, if you type 45, having selected 1-5V from Menu “mA-V Ranges”, with one of Analog
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

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 18
3.2.3.6 Output Quantities
Typed Character: 6
(Output Quantity)
How to set output quantities in RS232 Serial, RS485 Multidrop and Analog Output mode.
Screen page:
→→ Output Quantity
1. User
Esc. Exit
= 1
Sel:
♦By typing 1
(User):
The following screen page appears:
→→ Custom Format
0. q0
1. q1
2. q2
3. q3
4. q4
5. U-V-W
6. Speed in U-V
7. Speed of Wind
8. Azimuth
9. Elevation
S. Speed of sound
T. Sonic temperature
C. Compass
E. Errors
Esc. Exit
= st012c5789e
Sel [max 11]:
You can select the type and order of measured quantities which will appear from left to right in
Output Data, supplied in RS232 Serial mode or obtained after a query in RS485 Multidrop mode.
For Analog Output mode, you can choose the type and order of measured quantities coupled with
the five Analog Outputs available.
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.

HD2003 – HD2003.1 Ultrasonic Anemometers Rev.2.0 February 2006
Delta Ohm – Caselle di Selvazzano (PD) ITALY 19
RS232 Serial and RS485 Multidrop Mode.
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.
Analog Output Mode.
In Analog Output mode, the output quantities format is extremely transparent for the user who will
have these quantities in the terminals designed for Analog Outputs. These quantities will be
converted into analog output ranges selected as shown in Chapter 3.2.3.5.
They coincide with the first five quantities selected from the above-mentioned string of output
quantities, without considering the ones that follow. They will be available in the terminals of
Analog Outputs, in the same order as they have been chosen in the string.
For instance, if you set a string of quantities like st78c59, the last two quantities, i.e. 5 (U,V,W) and
9 (Elevation) are ignored, while the first five quantities will be available in the terminals of Analog
Outputs (see Fig.1 – HD2003 Connector):
Output Quantities HD2003 Connector Symbol
s (Speed of Sound) E OUTV1
t (Sonic Temperature) V OUTV2
7 (Speed of wind) c OUTV3
8 (Azimuth) Z OUTV4
c (Compass) M OUTV5
NB: In this example, an analog voltage range has been selected (Chap. 3.2.3.5).
By typing:
0 1 2 3 4
(q0) (q1) (q2) (q3) (q4)
(HD2003 Model). The arbitrary selection of 0, 1, 2 allows to include the measurement of an
additional meteorological quantity, in the output quantities.
In the HD2003 Model, the following correspondence exists:
q0 -> Pressure (600 ÷ 1100mbar)
q1 -> Temperature (-40 ÷ 60°C )
q2 -> Relative Humidity ( 0 ÷ 100% )
q3 -> Optional
q4 -> Optional
Therefore, if you type characters 0 (referring to Pressure), 1(referring to Temperature), 2 (referring
to Relative Humidity), you can add these measurements to output quantities in the desired order.