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Related Manuals for THIES 4.3811.00.000
Summary of Contents for THIES 4.3811.00.000
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Page 1: Operating Instructions
Operating Instructions 021511/10/06 Ultrasonic Anemometer 2D 4.3811.00.000 Software version V2.00 or higher Status: 10/2006 ADOLF THIES GmbH & Co. KG Hauptstraße 76 37083 Göttingen Germany Box 3536 + 3541 37025 Göttingen Phone ++551 79001-0 Fax ++551 79001-65 www.thiesclima.com info@thiesclima.com... -
Page 2: Table Of Contents
Contents Application ..........................4 Mode of Operation ........................4 Measuring principle: Wind velocity and direction ..............5 Measuring principle: Acoustic virtual temperature............... 6 Preparation for Operation / Installation ..................6 Selection of installation site ....................7 Installation of anemometer ....................7 Alignment to north ....................... - Page 3 Technical Data........................23 Dimension Drawing ......................25 Accessories (available as optional features) ................ 25 Fig. Fig. 1: Connector assembly......................8 Table Table 1: Return values with incorrect interpretation of command ..........13 Table 2: Access key for different command levels ................. 13 Table 3: List of predefined data telegrams ..................
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Page 4: Application
No. and "Factory Setting". Order number and setting see supplementary sheet "Factory Setting" In addition, the default settings for device version 4.3811.00.000 are marked in "grey" in these Operating Instructions. Mode of Operation The Ultrasonic Anemometer 2D consists of 4 ultrasonic transformers, in pairs of two facing each other at a distance of 200 mm. -
Page 5: Measuring Principle: Wind Velocity And Direction
The time required for a measuring sequence is approx. 2.5 msec at +20°C at the maximum measuring speed. Measuring principle: Wind velocity and direction The speed of propagation of the sound in calm air is superposed by the velocity components of an air flow in the direction of the wind. -
Page 6: Measuring Principle: Acoustic Virtual Temperature
Measuring principle: Acoustic virtual temperature The speed of propagation of the sound depends on the absolute temperature of the air via a root function although it is more or less independent of the air pressure and only depends on the air humidity to a minor extent. -
Page 7: Selection Of Installation Site
Selection of installation site As already described, the ultrasonic anemometer transmits sound packages required to measure the propagation speed. If these sound packages meet surfaces that reflect sound, they are thrown back as an echo and can may result in incorrect measurements under unfavourable conditions. It is therefore advisable to install the ultrasonic anemometer at a minimum distance of 1 metre to objects in the measuring level. -
Page 8: Fig. 1: Connector Assembly
Coupling socket 507550 (Binder, series 432), EMC with cable clamp Cable strain relief View X Cable assembly 1 1. String parts onto cable according to diagram above. View X 2. Strip off cable sheath 20 mm Shorten exposed shield by 15 mm Strip off litz wire 5mm. -
Page 9: Connector Pin Assignment
Connector pin assignment Note: - The exact functional assignment can be found in the supplementary sheet "Factory Setting". - Pins 1 to 6 (inclusive) are electrically isolated from the supply voltage and the housing. Pin No. Function Comment View of solder terminal of coupling socket Selection device ID (Low active), Bit 0 Pull up 1mA internal... -
Page 10: Calibration
Calibration The ultrasonic anemometer does not contain any adjustable components such as electrical or mechanical trimming elements. All components and materials used show invariant behaviour in terms of time. This means that no regular calibration is required due to ageing. Errors in measured values are only caused by mechanical deformation of the transformer arms and associated changes in measurement path lengths. -
Page 11: Functional Description
When starting the ULTRASONIC, the communications parameters are output to the serial interface. Output takes place at 9600.8N1. The baud rate, the duplex modus and the ID are output: Example: THIES ULTRASONIC !00BR00006 !00DM00000 The ULTRASONIC starts with ID 0, a baud rate of 19200.8N1 and half duplex mode. -
Page 12: General Telegram Structure
7.1.1 General telegram structure For serial communication the ULTRASONIC has a fixed telegram format which also permits communication in bus mode. It has the following form: NNBB<cr> <cr> stands for Carriage Return (Enter key) for a data enquiry or NNBBPPPPP<cr> <cr>... -
Page 13: Return Values Of Ultrasonic
7.1.2 Return values of ULTRASONIC After a valid command has been input, the ULTRASONIC sends acknowledgement, e.g. acceptance of the parameter or output of a data telegram. For a standard command the response starts with a '!', followed by the ID and the parameter value. If the input command is TR or TT, the ULTRASONIC transmits a data telegram as the response. -
Page 14: Device Id
After the access key has been changed, the ULTRASONIC transmits a response which contains not only the parameter input but also the access mode. After parameters have been changed with the key '00001' or '00234', the ULTRASONIC must be reset to the locked state with the command 00KY00000. Example: 00KY00001 USER ACCESS... -
Page 15: Serial Data Output
The Ultrasonic incorporates two different practical procedures for averaging: • one procedure for generating vectorial mean values • one procedure for generating scalar mean values "Vectorial averaging" is set in this device version. Serial data output The transmission of data via the RS485 interface is known as serial data output. Two modes are available for data transmission: •... -
Page 16: Generation Of Check Sum
Where wind velocity standard deviation of wind velocity wind direction standard deviation of wind direction temperature standard deviation of temperature status byte check sum (EXOR link) identifier for scaling of wind velocity (K, N, M, S = km/h, Knots, m/s, mph) wind velocity in X-direction (east ->... -
Page 17: Definition Of Temperature Difference In Status Byte
7.5.3 Definition of temperature difference in status byte Bit 2 Bit 1 Temperature difference x to y path in Kelvin 0.0 K to 3.1 K 3.2 K to 6.3 K 6.4 K to 7.9 K ≥ 8.0 K → invalid measurement 7.5.4 Definition of averaging memory used Bit 4 Bit 3... -
Page 18: Output Of All System Parameters
The heating system switches off after another 10sec when: Acoustic virtual temperature> 7°C No error in acquisition of measured values Output of all system parameters Most parameters of the ULTRASONIC are stored internally in an EEPROM. The command SS can be used to output all stored parameters. -
Page 19: Configuration Of Ultrasonic Anemometer By Customer
Here it should be borne in mind that with a change in settings, the order number allocated at the factory can then no longer help with identification. These Operating Instructions relate to the device version 4.3811.00.000. For the adjustment of settings we recommend you consult the General Operating Instructions for THIES ULTRASONIC. -
Page 20: Command List, Short
Command List, Short Command Description <id>AA<para5> Functions for PIN WV/RXD-(Analog channel A) <id>AB<para5> Functions for PIN WD/RXD+ (Analog channel B) <id>AC<para5> Functions for PIN ADIO (Analog channel C) <id>AM<para5> Selection of averaging method (Average mode) <id>AN<para5> Analog output mode (Analog output) <id>AO<para5>... - Page 21 <id>NC<para5> Correction to north (North correction) <id>OD<para5> Emulation of an ULTRASONIC 1D (One dimension) <id>OR<para5> Telegram output interval (Output ratio) <id>OS<para5> Scaling of wind velocity output (Output scale) <id>PC<para5> Plausibility test (Plausibility check) <id>PR<para5> Periodic receive time (Receive time) <id>PT<para5> Periodic send time (Period transmit time) <id>RD<para5>...
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Page 22: Predefined Data Telegram
Predefined Data Telegram Wind velocity, direction, acoustic virtual temperature, status and check sum Command: TR00009 Telegram structure "Gamesa" : !iivvvdddttttwfR Ch. No. Character set Function 1 (!) Response character 2 (i) 0 ••• 9 Identifier 3 (i) 0 ••• 9 Identifier 4 (v) 0 •••... -
Page 23: Technical Data
Technical Data Wind velocity Measuring range 0...65 m/s Scaling of analog output freely selectable <= 5 m/s: ± 0.1 m/s (rms, mean over 360°) Accuracy ± 2% of measured value (rms, mean > 5 m/s: over 360°) Resolution 0.1 m/s: in telegrams 14.1 to 14.6 <0.1 m/s: in telegrams 14.7 and user-defined telegrams... - Page 24 80 VA @ 24V Protection type IP 65 (with proper installation, see section "Preparation for operation") Icing-up as per THIES STD 012001 EN 55022 5/95 class B; EN 50082-2 2/96 Model V4A stainless steel for housing and transformer arms Installation type Mast tube 1½...
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Page 25: Dimension Drawing
Dimension Drawing Take-up for mast tube 1 1/2“ 40mm deep 8-pole con- nector in shaft Ø70 Accessories (available as optional features) Connecting cable, complete 507751 15 m cable with coupling socket on transmitter side. The other end of the cable is equipped with core identification rings. - Page 26 ADOLF THIES GmbH & Co. KG Hauptstraße 76 37083 Göttingen Germany P.O. Box 3536 + 3541 37025 Göttingen Phone ++551 79001-0 Fax ++551 79001-65 www.thiesclima.com info@thiesclima.com - Alterations reserved - 4.3811.00.000_US-Anemometer-DSP_eng.doc 26 - 26 021511/10/06...