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3 Preparation for operation

Attention:

The working position of the anemometer is vertical (sensor
arms "above".
During installation, de-installation, transport or maintenance of
the anemometer it must be ensured that no water gets into the
shaft and connector or cable gland of the anemometer.
When using a lightning rod take care that it be installed in a
angle of 45°to a measuring arm; otherwise there wil l be
deviations in the measured values.

3.1 Selection of installation site

As described above, the ultrasonic anemometer transmits sound packages required to measure
the propagation speed. If these sound packages meet surfaces that reflect sound well, 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.

In general, wind meters should register wind conditions over a wide area. To obtain comparable
values when measuring the ground wind, measurement should be performed at a height of 10
metres above even and undisrupted terrain. Undisrupted terrain means that the distance between
the wind transmitter and the obstruction should be at least ten times the height of the obstruction
(s. VDI 3786). If it is not possible to comply with this provision, the wind meter should be installed at
a height at which measured values are influenced by obstructions located in the vicinity to the least
possible extent (approx. 6-10 m above the interference level). On flat roofs the anemometer should
be installed in the middle of the roof and not at the edge to thus avoid any preferential directions.

The ultrasonic-anemometer has an electro-magnetic compatibility which is far in excess of the
required standard threshold value.

Within the complete frequency range, required by standard, electro-magnetic fields with 20 V/m
(capacity of the test transmitter) could not affect the measuring value acquisition of the instrument.

In case you intend to install the instrument at transmitter masts or other sources of strong electro-
magnetic radiation, where the local field strength is far above the standard threshold value, please
contact the manufacturer.

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Содержание Ultrasonic Anemometer 2D

Страница 1: ...ATHER DATA Instruction for Use 021537 06 10 Ultrasonic Anemometer 2D 451301 from software version V3 09 Status 05 2009 Feinger tebau K Fischer GmbH Venusberger Str 24 09430 Drebach Germany Phone 49 37...

Страница 2: ...16 3 5 Electrical Installation for Ultrasonic Anemometer with Screwed Cable Gland 17 3 5 1 Cable Pin Assignment Examples of function 17 4 Maintenance 18 5 Calibration 18 6 Warranty 18 7 Functional de...

Страница 3: ...5 7 4 6 4 Status information in telegram 9 46 7 5 Behavior of Instrument under extreme Conditions of Measurement Value Acquisition 46 7 5 1 In the event of error 47 7 5 2 Behaviour of analog outputs 4...

Страница 4: ...Return values with incorrect interpretation of command 21 Table 3 Access key for different command levels 22 Table 4 Config of analog outputs WV RXD and WD RXD with parameters AN and SC 25 Table 5 Ass...

Страница 5: ...ttings of the instrument The Ultrasonic Anemometer 2D is factory set Identification for the factory setting derives from the order No and the respective Factory Setting Order number and Setting see su...

Страница 6: ...ar wind velocity Standard deviation of the wind direction Standard deviation of the acoustic virtual temperature Wind velocity of the gust acc to WMO Wind direction of the gust acc to WMO Measurement...

Страница 7: ...ient temperatures This also ensures functionality with snowfall and sleet and minimises the risk of malfunctions due to icing up Thanks to additional ultrasonic transformer heating systems the model N...

Страница 8: ...the measurement results of the sum and the angle of the wind velocity vector are obtained in the form of rectangular components After the rectangular velocity components have been measured they are t...

Страница 9: ...ir without any water vapour content The deviation of the measured acoustic temperature from the real air temperature shows linear dependence on the absolute humidity level of the air The amount of wat...

Страница 10: ...and is for ex approx 2 8 with 40 C and 100 relative humidity The water vapour pressures to be expected in the nature are clearly below The error with the simplification of the formalism can consequen...

Страница 11: ...mperature by using an ultrasonic anemometer 2 Musa Mark Meteo Swiss Tammelin Bengt Finnish Meteorological Institute et al Measurement of temperature with wind sensors during severe winter conditions 3...

Страница 12: ...suring the ground wind measurement should be performed at a height of 10 metres above even and undisrupted terrain Undisrupted terrain means that the distance between the wind transmitter and the obst...

Страница 13: ...The instrument is fixed to the shaft with the four Allen screws SW 4 mm 3 2 1 Device to Refuse Birds optionally A protective pin prevents bigger birds from sitting on the instrument The device consist...

Страница 14: ...terfering magnetic fields e g iron parts electric cables Attention If an additional north marking N is attached on the sensor head see figure it is overriding for the north alignment In the bottom of...

Страница 15: ...cable diameter resistant to ultraviolet rays overall shielding Remark Optionally a completely converted connecting cable can be included in delivery for the ultrasonic anemometer see accessories Coup...

Страница 16: ...erface halve duplex and analogue outputs Pin allocation Function View of solder terminal of coupling socket 1 WG Analogue output wind speed 2 TXD RXD Serial interface 3 ADIO Function not preset 4 WR A...

Страница 17: ...e refer to supplement Factory Settings The pins 1 6 incl are galvanically isolated from the supply voltage and from housing Cable assignment Analogue outputs serial interface halve duplex Pin Colour C...

Страница 18: ...sed by mechanical deformation of the transformer arms and associated changes in measurement path lengths The acoustic virtual temperature can be used to check the effective acoustic measurement path l...

Страница 19: ...Duplex mode decides the type of physical connection of the serial interface In full duplex mode the send and receive signals are each transmitted via separate pairs of cables This means it is possibl...

Страница 20: ...switched over from the mode sending to the mode receiving This might lead to absurd telegrams In order to avoid this effect the ULTRASONIC has the parameter RD response delay With this parameter the r...

Страница 21: ...ce 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...

Страница 22: ...ent is equipped with an access key KY Inputting of the key accesses the individual levels Access to commands at a higher level includes access to commands at a lower level Access key Response from ULT...

Страница 23: ...SONIC once again After transmission the ULTRASONIC acknowledges the command with the output Baud rate saved Example The baud rate is to be changed to 962100baud Command Response ULTRASONIC Comment 00K...

Страница 24: ...logue inputs which read in an external voltage of 0 9 96V perform digital conversion and output this via the user specific telegram The ULTRASONIC is also equipped with the cable ADIO which includes d...

Страница 25: ...ed The parameter CZ describes the measuring value for 10 0V The output value for measuring value 10V shall be 80 C The conversion is as follows Command value 30000 80 10 30800 Through the command 00CZ...

Страница 26: ...he wind direction to be output via a range of 0 360 0 540 and 0 720 The last two modes are used when compatibility of the indicating device is required 7 2 5 Correction to north The command NC is used...

Страница 27: ...locity 720 Another possible setting is scaling of 0 720 As for 0 540 the unsteadiness is avoided at 360 A jump to 360 only takes place when the limit of 360 720 is exceeded for the second time It shou...

Страница 28: ...C0 Set measuring delay to zero 00MD0 Automatic measuring adjustment off 00MA0 All measured values of the ULTRASONIC can now be output if the high baud rate is high enough It is recommended creating a...

Страница 29: ...urpose one of the four possible combinations is selected using the Command AM as for Average Method Command for selection of averaging procedure AM0 Average Method Vectorial averaging of velocity and...

Страница 30: ...e measured data is output in the output telegram selected see Command TB On activating the burst mode the internal milliseconds counter is reset After activation the burst mode must be started within...

Страница 31: ...the analog input with command AB1 see Command AB Set the value for the pre trigger by BP for ex the parameter PB00100 records the data 100ms before the trigger event as well Format the analog value wi...

Страница 32: ...e 00BP100 Recording of data 100ms before the trigger event 00MD0 No delay between measurements 00MA0 Switch off of automatic measuring speed adjustment 00PC7 Switch on of plausibility 00AC16 Activate...

Страница 33: ...of the gust can be output only by means of the user specific telegram See chapter 7 4 5 Example 00AV3 one minute averaging 00GU030 Length of gust is 3 seconds WMO recommendation for gust length 00UT...

Страница 34: ...ate response telegram The time between the last character in the request telegram and the first character in the data telegram is 0 5ms The user defined telegram and the telegrams as for the definitio...

Страница 35: ...4 5 Vx Vy 7 STX aaa a bbb b ttt t ss cc CR ETX VD Variant 1 8 STX gg g ddd cc CRLF ETX VDT Variant1 9 iivvvdddttttwf CR VDT Variant2 11 See appendix chapter 10 Scientific telegram 12 See appendix cha...

Страница 36: ...s output For example the input of 00TR6 prompts the ULTRASONIC to output the user defined telegram The commands UA UT UR and US are available to define the user defined telegram See here also Command...

Страница 37: ...rn Enter key occupy 5 blocks in which only one character each is seized The output leads to the same result in both cases but considerably more memory is used in the second version A new block is gene...

Страница 38: ...ithout a sign using a total of 6 characters including comma and 2 places after the comma the complete formatting string is as follows 00UT 8 6 2 If a line feed is to also be added to the end of the ou...

Страница 39: ...tion of normalised wind velocity in X direction NUMBER 21 Standard deviation of normalised wind velocity in Y direction NUMBER 22 Standard deviation of virtual temperature NUMBER 23 Reserved 24 Reserv...

Страница 40: ...the same time most universal data format It is used to output fixed text within the telegram output This data format requires no further formatting characters For example the command 00UTHello World...

Страница 41: ...ut 29 0d cr cr stands for Carriage return Enter key Outputs the storage interval with three places without a sign Only with averaging switched on is display not equal to zero Example 2 00ut 29 3 2 h 0...

Страница 42: ...data format PR F_SUMME supports calculation of a check sum on the basis of a byte wise exclusive OR link The CHECK SUM has the following format 36 First Last Number of characters Format where 36 Measu...

Страница 43: ...BCC XOR 36 2 3 2 2 h 0d cr cr stands for Carriage return Enter key The output is AABBCC XOR 42h The value for the check sum is 42h The ASCII value of 42h is B which is the character to be checked itse...

Страница 44: ...Bit 4 Static malfunction Is set when a static malfunction has occurred e g lasting violation of VT no measured values 1min Bit 5 bit 7 Reserved Is always zero Bit 8 Bit 9 Bit 10 Bit 11 Used averaging...

Страница 45: ...Bit 4 Reserved Is always zero Bit 5 Static malfunction Is set when a static malfunction has occurred e g lasting violation of VT no measured values 1min Bit 6 Heating criterion Is one when the criteri...

Страница 46: ...0 0 1 80 x 66 1 0 66 x 33 Bit 4 Buffer fill level 1 1 33 Bit 5 reserved Is always zero Bit 6 reserved Is always one Bit 7 Heating on Is one when heating is switched on 7 5 Behavior of Instrument under...

Страница 47: ...ing control To prevent the instrument from freezing and to avoid consequential error measurements the ULTRASONIC is equipped with built in heating for the sensor arms In standard mode the heating is c...

Страница 48: ...ading out of value on supply of instrument in back up operation with inactive heating 3 Setting of automatic threshold on mean value between the measured values by command HC see Command HC Model with...

Страница 49: ...uffer fill level 2 increments basis is the value from the extended status valence 16 6 Temperature difference from X to Y distance 3Kelvin at WV 2m s valence 32 7 Temperature difference from X to Y di...

Страница 50: ...Initiating defects of the sensors respectively temporary disturbance in the measurement distance If these errors occur several times in quick succession only the first signal is recorded or in case t...

Страница 51: ...in ADIO can be switched so that the PIN is set to V when the averaging buffer of the ULTRASONIC has reached a content level 7 8 Here the shortest adjustable averaging time is 600ms see also Command AC...

Страница 52: ...TRASONIC turns into the boot loader mode where further details can be stated The following output appears use id BR000XX to set baudrate use id ID000XX to set ID use id DM0000X to set duplex mode use...

Страница 53: ...In this mode it is more likely to obtain a valid measured value in fault conditions e g rain A complete data record is now made every 4ms using all 4 sensors so that the ULTRASONIC generates 250 measu...

Страница 54: ...1 Storing of Parameter Data Set The ULTRASONIC is able to store internally three complete parameter data sets By the commands SP and RP complete parameter sets are stored respectively read out from th...

Страница 55: ...The command 00UD1 THIES ULTRASONIC Stores the text THIES ULTRASONIC at data position one The query 00UD1 provides the result 01 THIES ULTRASONIC During the query the data set number is always included...

Страница 56: ...analogue input PIN WG RXD Command BZ id BZ para5 Scaling of the maximum value for analogue input PIN WG RXD Command CA id CA para5 Adjustment value for analog outputs in 0 1 per mil inclination Comman...

Страница 57: ...SL para5 Serial number low word Command SM id SM para5 System event mask Command SP id SP para5 Store parameter data set Store Parameters Command SS id SS para5 System status Command SV id SV para5 So...

Страница 58: ...he ULTRASONIC and are re imported The analog voltage value at WV RXD undergoes digital conversion cyclically and is read in by the system The digital value read in can be output via the user defined t...

Страница 59: ...ode for PIN3 ADIO It can either be switched as an analog input digital input or digital output The functions of the PIN3 ADIO are independent of the duplex mode selected Attention For instruments of a...

Страница 60: ...ment ends 17 Starts measurement in burst mode when PIN3 ADIO is switched to AGND If PIN3 ADIO is open no measurement is started Internal pull up resistor switched on If PIN3 ADIO is fixed to AGND burs...

Страница 61: ...ind direction scaling can be selected in which the angle is output To preserve compatibility with existing systems it is sometimes necessary to select an extended angle range The ranges 0 360 0 540 an...

Страница 62: ...nd the outputs are written The parameter defines the interval between two complete update intervals in ms A conversion time of approx 2 5ms is required per channel In the configuration each of the thr...

Страница 63: ...quality of the measured values is not achieved until a certain content level of the mean value buffer If an averaging period of AV0 is selected the averaging period is calculated from the selected ou...

Страница 64: ...eter value Measuring instrument address of WV Measuring instrument address of WD Measuring instrument address of VT 0 11 1 22 1 400 410 420 2 202 201 211 3 11 1 21 4 81 82 83 5 1 2 3 Table 9 Measuring...

Страница 65: ...1200 baud 8 N 1 3 2400 baud 8 N 1 4 4800 baud 8 N 1 5 9600 baud 8 N 1 6 19200 baud 8 N 1 7 38400 baud 8 N 1 8 57600 baud 8 N 1 9 115200 baud 8 N 1 10 1200 baud 7 E 1 11 2400 baud 7 E 1 12 4800 baud 7...

Страница 66: ...rom 230400baud to 921600baud The following baud rates are defined for BX Parameter description 101 230400 baud 8 N 1 102 460800 baud 8 N 1 103 921600 baud 8 N 1 Table 11 List of baud rates with telegr...

Страница 67: ...orm By means of the command BY the output value is stated for 0V input voltage The value for the parameter BY is calculated as follows Parameter value 30000 reference value 10 See also 7 2 1 and Comma...

Страница 68: ...he format of the commands input THIES is selected as the standard command interpreter It awaits commands in the form XXBBnnnnn CR Telegram to change a parameter XXBB CR Interrogation telegram Where XX...

Страница 69: ...al value Command DE id DE para5 Standard deviation Deviation Access User mode Description Switches calculation of standard deviation on or off The ULTRASONIC includes an option for calculation of the...

Страница 70: ...ission of the send or receive signals is via the same pair of cables Depending on the setting there are restrictions on the function of the connector PINs of the ULTRASONIC see Command AA Command AB C...

Страница 71: ...mum value is output at the analog outputs in the case of error If the ULTRASONIC establishes a static error during a measurement it will output an error under certain conditions This output is designe...

Страница 72: ...f the start parameters with 9600baud from boot loader version V1 43 3 Fast boot switched off After a restart the X modem boot loader starts first the main program afterwards In case of a preferably fa...

Страница 73: ...ument on activation of the heating The basis for this is a pulse duration of 100ms On start up the ratio between switched on heating to switched off heating is 1 100 After every further 100ms this rat...

Страница 74: ...nquiry mode Description To change the parameters of the ULTRASONIC access authorisations are necessary for most commands This prevents any accidental change in parameters Access takes place on three l...

Страница 75: ...is stated on 0 1 ms that means a value MA equates 1 3 ms Range of values 0 100 Initial value 13 Command MD id MD para5 Measuring interval Measurement Delay Access User mode Description Specifies the t...

Страница 76: ...s to a period of approx 11 4 years The counter reading remains of course in case of power failure or de installation of the instrument Initial value 0 Command OR id OR para5 Telegram output interval O...

Страница 77: ...s the plausibility checks on off Every measured value is checked when Plausibility is switched on It is checked whether the measured value is plausible and whether it fits into the sequence of measure...

Страница 78: ...a5 Correction factor for analog input values Reference Correction Access Configuration mode Description The command specifies a correction factor in 10ppm for the measured values of the analog inputs...

Страница 79: ...connection of the supply voltage Range of values 1 Initial value No initial value Command SC id SC para5 Minimum value of analog outputs Start Current Access User mode Description When using analog o...

Страница 80: ...This serial number allows the ULTRASONIC to be clearly identified Storage of the serial number is divided up into high and low bytes The serial number must not be changed Range of values 0 65535 Comm...

Страница 81: ...s stored in the EEPROM are output here Before parameters of the ULTRASONIC are changed this command should be used to generate and save a list of the selected parameters e g by copying parameters to a...

Страница 82: ...ation time of the ultrasound ultimately resulting in corruption of an acoustic virtual temperature Parameter TC is used to take account of the crosswind component and to correct the acoustic virtual t...

Страница 83: ...gram wind velocity wind direction virtual temperature 3 V4DT telegram wind velocity wind direction virtual temperature 4 NMEA V2 0 5 VDT with standard deviation values 6 User defined telegram 7 Veloci...

Страница 84: ...signs each where any text can be stored By the command UD this buffer is administered The format of entry is 00Udn xxxx with n index 1 32 xxxx text with a maximum length of 32 signs query 00UD return...

Страница 85: ...and TT Parameter description 2 Saves the telegram definition in the internal EEPROM Range of values 2 Initial value No initial value Command UT id UT para5 User specific telegram User Telegram Access...

Страница 86: ...the external lines WV RXD BIT 0 WD RXD BIT 1 and ADIO BIT 2 Here the channels must be configured accordingly See Command AA Command AB Command AC On start up the ULTRASONIC reads in the ID and stores...

Страница 87: ...d of Text 03h 11 2 Telegram 2 VDT Wind speed wind direction acoustic virtual temperature Command TR2 command TT2 Telegram construction STX xx x xxx xxx x xx xx CR ETX Telegram output in case of error...

Страница 88: ...20 nn Status value hexadecimal 20 nn Status value hexadecimal 22 Check sum identifier 2Ah 22 Check sum identifier 2Ah 23 nn Check sum hexadecimal 2 18 23 nn Check sum hexadecimal 2 18 25 CR Carriage...

Страница 89: ...n STX xx x xx x xxx xxx xxx x xxx x xx xx CR ETX Telegram output in case of error The telegram format corresponds to the data telegram with respective status value No Character Function Value 1 STX St...

Страница 90: ...decimal 1 22 23 nn Check sum hexadecimal 1 22 25 CR Carriage return 0Dh 25 CR Carriage return 0Dh 26 ETX End of Text 03h 26 ETX End of Text 03h 11 7 Telegram 8 VD Variant 1 Wind speed and Wind directi...

Страница 91: ...riage Return 11 9 Telegram 11 VDT Variant 2 Wind velocity wind direction and acoustic virtual temperature Command TR11 Command TT11 Telegram construction STX xx xx x xxx xxx x xxxx xx CR LF ETX Telegr...

Страница 92: ...er 2 in direction Converter 4 east west direction 5 N1 Internal counter 5 N2 Time interval where the values are written into the main average memory 5 N3 Number of values in the main average memory 5...

Страница 93: ...y Vy 36 Semicolon 36 Semicolon 37 nnnnn Number of mean values 37 99999 Number of mean values 42 Semicolon 42 Semicolon 43 nnnn Status value extended status 43 9999 Status value extended status 47 Star...

Страница 94: ...selectable Standard deviation for wind velocity direction and acoustic virtual temp Predefined data telegrams or user defined data telegram Output rate 1 per 1msec to 1 per 60 seconds adjustable Statu...

Страница 95: ...arms and US converter 24 V AC DC 15 typical 85 VA max 90 VA 24 V with 4 382x 4x xxx Supply electronics heating with heating operation of US arms US converter and housing 48 V AC DC 15 typical 280 VA m...

Страница 96: ...96 96 021537 06 10 13 Dimension Drawing 70 287 200 424 Distance between reception tube and Sensor Centre 378 Plug Cable in shaft reception 50 mm for mast tube 1 in shaft 40 mm North marking...

Страница 97: ...97 97 021537 06 10 North drilling North notch 60 Bottom views North drilling 5 1 0 1 8mm deep South drilling 6 10mm bottom up North notch 11 mm wide 60 9 5 deep North marking Bottom views...

Страница 98: ...mpact 1 9 3199 01 100 For power supply to the ultrasonic anemometer 4 382x 0x xxx 4 382x 3x xxx and other measuring value transmitter Primary 230V 50Hz Interface converter 9 1702 xx 000 For RS 422 sig...

Страница 99: ...agnetic compatibility and repealing Directive 89 336 EEC 2006 95 EC DIRECTIVE 2006 95 EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 December 2006 on the harmonisation of the laws of Member St...

Страница 100: ...100 100 021537 06 10 Copyright Adolf Thies GmbH Co KG Alterations reserved...

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