WindMaster & Windmaster Pro Ultrasonic Anemometer User Manual
Contents
1. SRPS 9 30V 6 7 Connection to a PC using RS 422 Notes 1 The PC must be fitted with an internal or external RS422 RS232 converter 2 Configure WindMaster for RS 422 by linking Comms Mode line Pin 4 to OV Pin 12 WindMaster connector BC ya converter Pin nos Cable twisted Signal names Signal names pairs Bre T ey ae TXA 1 RXA o S Py i RXA 6 TXD Signal Ground Screen 3 7 21 Screen and drai Chassie stond Use the most convenient pin 30 or 31 8 Comms Mode link to Power OV Pin 12 4 or leave unconnected Power V 1 DC Power P OV 12 ae A 9 30V WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 6 8 Connection to a PC via a Power and Communications Interface Dependent upon system requirements the WindMaster unit can be operated with the Power and Communications and Interface unit PCI which can be ordered as an optional extra Connect WindMaster via RS422 port then connect computer to RS232 port on PCI Environmental The Desktop PCI is intended for use in a protected environment and provides interfacing to a single anemometer RS232 and RS422 ports are provided The PCI is not intended for outdoor use PCI Electrical Power Requirements 1 100Vac 120Vac 10VA for the 115V switch position 2 200Vac 250Vac 10VA for the 230V switch position 3 9 30Vdc 55mA excluding analogue outputs anemometer2. 8 15Vdc 50mA max interface 3 fuses protect the unit 1 Externally accessible 315 mA T for 115 230v operation 2 Internally accessible 500 mA T AUX 500 m A T ANEM Connector Pin and Cable Assignments for PCI Anemometer connector 15 way Pin Designation Screen RS422 RXB RS422_ TXB Digital OV Signal ground Supply V Analogue output V1 Not used Analogue output V2 RS422_RXA RS422_ TXA Supply V Oo AND NN PWN e e N Analogue output V4 Ww Analogue 0V Not used Analogue output V3 Se nn A WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 DC Supply 4 way Pin RW N RK Designation Interface V Interface V Anemometer V Anemometer V RS232 Output 9 way Pin OwWONI DN BW NY Designation DCD RX data TX data DTR Signal Ground DSR RTS DCD RI RS422 Input Output 9 way Pin O AmONI DN BW NY Designation Not connected Not connected Not connected RS422_RXA Signal ground RS422_TXA RS422_ TXB RS422 RXB Earth 20 Issue 2 August 2006 1561 PS 0001 WindMaster and WindMaster Pro ZZO N 68 LL YY SNOISN3NIG LINN Idd YOOGNI i a i ee a ON aa STIL WWO P SYM WWO 92 ONY WWO RE SVM are Bien wwg s0z WUB SYM WWO 6RL N MIG z 96 14 94 d ey et payl P Houvassa atya T3AIIHI NAV HSINIA 0L WA3N39 TID sig ie ae 4aSV413u SH eo and LVE alten no aasn ee awas aava
3. 12 Vdc excluding analogue outputs RS232 RS422 RS485 network up to 8 anemometers 2400 57600 Resolution 14 bit User selectable full scale wind speed 0 20 mA 4 20 mA 0 5 V 5V 0 2 5V Resolution 14 bit plus PRT 100ohm option 5 V 40 C to 70 C 1 7 kg 750 mm x 240 mm IP65 40 C to 70 C lt 5 to 100 Operation up to 300 mm hour Emissions BS EN 61000 6 3 Immunity BS EN 61000 6 2 Accuracy specification applies for wind speed up to range maximum and for wind incidence up to 30 from the horizontal Custom calibration to be specified when ordering or unit can be returned for calibration Wind tunnel calibration is in accordance with ISO 16622 and traceable to national standards 8 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 5 PRE INSTALLATION 5 1 Equipment supplied WindMaster or WindMaster Pro Connector assembly comprising 31 way Clipper connector Solder bucket pins Sealing gland and washer Installation kit Four M6 stainless steel nuts bolts and shake proof washers User Manual this document 5 2 Software WIND software is available free at www gill co uk and is strongly recommended as it provides an easy user friendly interface 5 3 Options Notes These options must be specified when ordering the WindMaster or WindMaster Pro See Section 4 Specification for more detail WindMaster WindMaster Pro Fo
4. SOS and Sonic Temperature display Neither Analogue input display OFF Analogue output velocity full scale Sm s Analogue output mode Ov to 5Y Ouput rate 1Hz 40Hz sampling OK 31 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 To change the WindMaster configuration click Tools and Wizard in the tool bar Anemometer Wizard Message Output Format Poa i iti is sS YS Baud Rate Jeo S YS Output Rate THz 40Hz sampling gt Message Terminator ke H Measurement Units m s SOS Sonic Temp Display Neither z Display Analogue Inputs OFF X Analogue Output Mode ov to 5V x Analogue Output Scale 5m s x Direction Wrapping 360 degree wrap x A typical screen is shown below Customer is able to adjust all the settings as required taking into account the options selected at time of order Anemometer Wizard Unit Identifier Q z Physical Communications Auto 7 Power on Message Display Power On Messac 7 V Retries Enabled M Insantaneous Sampling IV Calibration Enabled ASCII Format Comma Seperated CSV 7 DAC Channel 1 360 degree wrap Sms al Sms sh Polar angle DAC Channel 2 Polar Magnitude DAC Channel 3 W output DAC Channel 4 Status z M Bolling Average for velocity Fields Good signal high bad Bolling Average Depth 5 hd Next gt Cancel 32 WindMaster and WindMaster Pro 1561 PS 0001
5. Issue 2 August 2006 Anemometer Wizard ail et ack ap pe Op EL AS Channel 4 Status iz Good signal high bad Vv Rolling Average tor Velocity Fields Bolling Average Depth Analogue Input Channeli Analogue Input Channel 2 Analogue Input Channel 3 Analogue Input Channel 4 Analogue Input E Analogue Snalogue Input E Analogue Input Channel g When the changes are complete the Wizard will display a confirmation of the changes with all changes shown in red this may be printed as a hard copy if required Click next and the WindMaster will be re configured and will return to measurement mode Anemometer Wizard Output Message Format Polar Output Message Format UVW Output Message Velocity Units m s Output Message Terminator lt cr gt lt lf gt Retries ON Instantaneous Sampling OFF Factory Calibration ON Physical Communications Auto Power On Message Display Power On Message Cll Format Comma Seperated CSV Ouput Channel 1 Axis full range 5rm s Ouput Channel 2 Polar angle wrap mode 360 degree wrap Ouput Channel 3 Polar Magnitude full range 5m s Input Channel 0 0 0 2 5 Innut Channel 1 1 1 m 33 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 10 2 Configuring using Hyperterminal Note Other terminal emulators can be used to configure the WindMaster in a very similar way Setting u
6. cae a 3BNvHO NOLL Se I530 oss WW NI JAY SNOISNSWIC NY 21 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 6 8 Networking using RS485 Notes 1 Upto 8 WindMasters can be networked as Slaves 2 WindMasters must be configured for RS485 by linking Comms Mode line Pin 4 to OV Pin 12 3 WindMasters must be in Polled mode with each device given a unique node address before they are connected to the network buss 4 The Master unit can be any suitable control device fitted with a RS485 interface card such as a PC or Data logger 5 Power needs to be supplied to each unit in the network r Master WindMaster connector 3 eg PC with RS485 card Signal names Pin nos Signal names TXB 2 RXB 5 T RXB TXA 1 T RXA RXA 6 Signal ground Comms Mode link to Power OV Pin 12 4 Screen Use the most 3 7 21 Screen and drain wires Chassis ground convenient pin 30 or 31 Power V 11 DC Power supply Power 0V 12 9 30V To next unit lt Up to 8 units 22 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 6 9 Mechanical installation Before installing it is strongly recommended that a bench test is carried out Location Select a position so that the unit is clear of any structure which may obstruct the airflow or induc
7. ransducer Firing Analogue Input Measurement Serial Communications L gt U Indicates lower to upper transducer firing U gt L Indicates upper to lower transducer firing Analogue inputs 1 amp 2 are sampled every measurement period Analogue inputs 3 amp 4 are sampled alternatively ie half of measurement rate PRT is sampled once every 4 firings ie quarter of measurement rate Signal processing Instantaneous Sampling The WindMaster can be configured to output the sampled data direct at the selected output rate without any averaging Instantaneous Sampling Alternatively data can be sampled at 32 or 40 Hz and averaged see section 10 2 PX This applies for wind data and speed of sound All samples are transmitted with a status code Retries Enabled If this mode is selected if a problem sample is detected the unit will attempt another ultrasonic firing within the set time parameters Calibration Enabled Disabled The on board calibration providing compensation for spar and transducer shadowing can be disabled returning the unit to raw uncorrected operation WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 4 SPECIFICATION Outputs Output rate Sample rate automatically selected Units of measure Format Averaging Wind Speed Range Resolution Accuracy 12 m s Standard Accuracy 12 m s to special order Direction Range Resolution Accuracy 12 m s Standard Acc
8. PS 0001 Issue 2 August 2006 7 MESSAGE FORMATS On applying power to the WindMaster it will automatically operate in the Measurement Mode and provide wind measurements in one of the following formats gt Gill Polar Continuous default format gt Gill UVW Continuous gt Gill UVW Polled gt Gill Polar Polled Note In this Section the default settings are shown in Bold Information on how to change the formats and all the settings follows in Section 10 CONFIGURING 7 1 Gill format Polar Continuous Default format lt STX gt Q 229 002 74 000 46 341 29 21 01 M 00 lt ETX gt 06 a VN WindMaster Horizontal Horizontal Vertical Speed of sound Units Status node address wind direction wind speed wind speed and or temperature if enabled WindMaster node address The default setting is Q If there is more than one WindMaster in a network the others MUST be renamed R to Z so that each WindMaster is uniquely identified Horizontal wind direction Indicated in degrees from 0 to 359 with respect to the WindMaster North marker In fixed field mode and when the wind speed is below 0 05 metres sec the direction will not be calculated but the last calculated direction above 0 05 m s will be output The threshold of 0 05 m s is the default setting it is user configurable Horizontal wind speed Shows the wind speed in the U V Plane See Fig 2 Vertical wind speed Shows the magni
9. Pro 1561 PS 0001 Issue 2 August 2006 Ex Set Physical Communications 1 AUTO 2 485 3 232 This can also be overiden from RS232 to RS422 485 by linking the comms line to V for RS232 or to OV for RS422 485 See section 6 5 to 6 9 Fx y Set user changeable options If x 1 then y 1 0 turns on and off the retry settings If retries occur the timing of the sampling will be slightly altered If x 2 then y 1 0 turns on and off the instantaneous sampling see section 3 instantaneous If x 3 then y 1 0 turns on and off the internal wind data calibration warning with this off there is no adjustment for the spar supports of the unit For example F1 0 turns off the retries and F1 1 turns them back on Notes If Instantaneous Sampling is enabled all output data is exactly as measured ie there is no averaging If Calibration Data is enabled the internal calibration table is used to provide greater accuracy compensation for spar and transducer shadowing Gxx Controls Averaging setting The unit can be used to average readings over long periods of time up to 3600 seconds When the Gxx command is used the unit is automatically switched to P1 mode 1Hz and will output every xx seconds it will not output any data in between readings so for long averaging periods the unit will appear to be inactive If xx is set to zero then averaging settings will be disabled While averaging is active the Px command is di
10. Pro 32Mhz2 SS Gill Instruments Ltd 2366 113 RS232 AUTO CHECKSUM ROM DB27 OB27 PASS CHECKSUM FAC 67BF G7BF PASS CHECKSUM ENG 166A 166A PASS CHECKSUM CAL A14E A14E PASS 6Q 166 001 74 066 45 60 164 061 81 000 64 60 163 001 66 00G 17 6Q 163 001 47 90G4 11 6Q 163 061 24 066 12 6Q 163 661 47 666 14 6Q 163 661 41 666 17 60 166 061 85 006 12 60 157 062 26 006 16 eQ 1660 001 98 000 13 eQ 164 001 43 000 05 66 002 66 13 66 001 46 004 68 002 eal 66 004 66 16 66 008 00 4907 66 002 3232323233122323 If you need to review your instrument settings click Tools and Report config in the tool bar When selected a similar message to that below will be displayed Anemometer Wizard Sw VERSION Anemometer Firmware Version 2306 113 HW DETAILS OF ANEMOMETER Detected Anemometer Class WindMaster Pro 32Hz SS Number of AXIS on this unit 3 ADC resolution of attached unit 12 DAC resolution of attached unit 12 Number of ADC channels 4 Number of DAC channels 4 Maximum sampling rate 9 32Hz 32Hz sampling USER CONFIGURATION OF ANEMOMETER Baud Rate 9600 Output Message Format Polar Output Message Velocity Units m s Output Message Terminator lt cr gt lt If gt Retries ON Instantaneous Sampling OFF Factory Calibration ON Physical Communications Auto Power On Message Display Power On Message ASCII Format Comma Seperated CS
11. WindMaster or WindMasterPro manufactured by Gill Instruments Ltd The units have no customer serviceable parts and require no calibration or maintenance To achieve optimum performance we recommend that you read the whole of this manual before proceeding with use WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Gill products are in continuous development and therefore specifications may be subject to change and design improvements without prior notice The information contained in this manual remains the property of Gill Instruments and should not be copied or reproduced for commercial gain 2 INTRODUCTION This manual describes the operation of both the WindMaster 1590 PK 020 options and WindMaster Pro 1561 PK 020 options The instruments replace the previous WindMaster model 1086 PK 046 and WindMasterPro 1352 PK 001 Refer to appropriate manuals for these instruments The term WindMaster is used in this manual as a general term for both the WindMaster and the WindMaster Pro they are robust three axis anemometers with no moving parts The units of wind speed output rate and formats are all user selectable The WindMaster constructed in aluminium and carbon fibre can perform measurements in wind speeds up to 45 m s The WindMaster Pro constructed from marine grade stainless steel 316 can perform measurements in wind speeds up to 65 m s Options include up to four analogue input and four analogue o
12. electronics ref 9 026 02663 8774 91009 The cable allows for the connection of all Power inputs Digital inputs Analogue inputs Analogue Outputs Note If PRT input option is selected customer must compromise on the number of enclosed inputs or outputs If PRT is connected you must sacrifice two analogue inputs or outputs WindMaster and WindMaster Pro 1561 PS 0001 6 4 Cable length The maximum cable length is dependent on the chosen communication format RS232 RS422 or RS485 the baud rate and to a lesser extent on the cable type and the local electrical noise level Communication format Baud rate Max cable length RS232 9600 6 5 m 20 ft or if using Cat 5 cable see manufacturers recommendations RS422 485 9600 1 km 3200 ft Analogue outputs N A 6 5 m 20 ft voltage Analogue outputs current N A Resistance dependent max 250 Q The table shows the typical maximum lengths at the given baud rates using the recommended cable If any problems of data corruption etc are experienced then a slower baud rate should be used Alternatively a thicker or higher specification cable can be tried Issue 2 August 2006 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 6 5 Connections Do NOT join any of the cores of the cable together Do NOT connect the unit s analogue output OV or power OV to the screen or ground earth Th
13. reply M1 When the unit is returned to the Measurement mode it will be in UVW Continuous format Note The factory set default settings are shown in bold in the following sections 35 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Command List COMMAND USER SOS Sonic Temp Output Baudrate Analogue angle wrapping Diagnostic Config info Set Physical Comms Misc user settings Averaging Settings Power on message Disable Enable analogue input High Low Resolution Minimum Direction Velocity Message Terminator Message Format Set Unit ID Set ASCII format Set output rate MEASUREMENT MODE Analogue output range Analogue output type amp Config Select Units PRT output ON OFF SN K X a lt a a FRO DO z SIO AS TE aoa SS a w gt INTERACTIVE MODE Where the command is a single parameter command the notation is Dx for example if the parameter x 2 then in interactive mode the user would type D2 A two parameter command may be used see F for example In this instance the notation is Fx y for example to turn on the retries the user would enter F1 1 with a space between the two 1 s Some commands can be used in either two parameter or single parameter mode to allow increased functionality this is clearly specified below Typing just the c
14. 01 59 002 74 000 27 341 29 21 01 M 00 lt ETX gt 2D a WindMaster U axis V axis W axis Speed of sound Units Status node address speedand speedand speedand and or temperature polarity polarity polarity if enabled All the other parameters are as described in Section 7 1 7 3 Gill format Polled Polar or UV When in the Polled mode an output is only generated when the host system sends a Poll signal to the WindMaster consisting of the WindMaster Unit Identifier that is the relevant letter Q Z The output formats are otherwise as described in Sections 7 1 and 7 2 The commands available in this mode are Description Command WindMaster response WindMaster Unit Identifier Q Z Wind speed output generated Enable Polled mode none Disable Polled mode none Request WindMaster Unit amp Q Z as configured Identifier Enter Configuration mode lt N gt CONFIGURATION MODE Where lt N gt is the Unit Identifier 27 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 8 ANALOGUE INPUTS Options of four analogue inputs and outputs must be specified when ordering 8 1 Analogue Inputs The input range is fixed at 5V For pin connections see 6 5 Connections Must be specified when ordering Note The Analogue inputs must be enabled if they are to be used See Section 10 Configuring Specification Input range SVtot t5V Common mode input range 5V I
15. INSTRUMENTS WindMaster amp Windmaster Pro Ultrasonic Anemometer User Manual Doc No 1561 PS 0001 Issue 02 Gill Instruments Limited Saltmarsh Park 67 Gosport Street Lymington Hampshire S041 9EG UK Tel 44 0 1590 613500 Fax 44 0 1590 613501 E mail anem gill co uk Website www gill co uk WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Contents Contents 1 1 FOREWORD 3 2 INTRODUCTION 4 3 PRINCIPLE OF OPERATION 5 Polar definition 6 U V and W axes definition 6 Effects of temperature barometric pressure rainfall and humidity 7 Measurement sequence 7 Signal processing 7 4 SPECIFICATION 8 5 PRE INSTALLATION 9 5 1 Equipment supplied 9 5 2 Software 9 5 3 Options 9 5 4 Accessories 9 5 5 Packaging 9 5 6 Installation requirements 9 PC requirement 9 Other equipment 10 Connection 10 Power supply 10 6 INSTALLATION 11 6 1 Installation Guidelines 11 6 2 Bench system test 11 6 3 Cable type 11 6 4 Cable length 12 6 5 Connections 13 Cable assembly 14 Connector Pin amp Conductor positions 15 Grounding earthing 17 6 6 Connection to a PC using RS 232 18 6 7 Connection to a PC using RS 422 18 6 8 Connection to a PC via a Power and Communications Interface 19 Environmental 19 Electrical Power Requirements 19 Connector Pin and Cable Assignments for PCI 19 6 8 Networking using RS485 22 6 9 Mechanical installation 23 Location 23 Orienta
16. Pro 1561 PS 0001 Issue 2 August 2006 Now screw the cable clamping nut into place The connector can now be removed from the WindMaster Grounding earthing To ensure correct operation and for maximum protection against lightning the anemometer MUST be correctly grounded earthed via its mountings Inadequate grounding will degrade anemometer performance particularly in the presence of radio frequency interference The unit MUST be connected to an appropriate grounding point with a minimum of 6mm copper wire via the M6 base screws The primary earth for the anemometer must be provided via the base screws and not via the cable screens 17 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 6 6 Connection to a PC using RS 232 Notes 1 Using RS232 the cable length for reliable operation is limited to 6 5m 20ft 9600 Baud See 6 4 2 For longer cable runs we recommend using the WindMaster configured with RS422 output and a RS422 232 converter at the PC See 6 7 3 Ensure WindMaster is configured for RS232 See Section 10 Configuring WindMaster IRE T Typical Serial connector 9 Way D Pin nos Cable Signal Signal names A Pin nos 2 twisted pairs names TXA 1 RXD 2 RXA 6 TXD 3 Signal comms 5 Ground Comms Mode 4 link to Power V Pin 11 Screen 3 7 21 Screen jand Chassis NYA Use the most convenient pin 30 or 31 ground DCP Power V 11 A Power 0V 12
17. e integrity of the screen of each pair should be maintained throughout the cable run Important gt Any cores not used should be isolated gt gt gt Avoid long grounding loops For maximum lightning protection it is essential that the unit is properly grounded via its mounting base Function Remarks Pin No TXA Anemometer Transmit 1 TXB 4 Anemometer Transmit 2 RXB Anemometer Receive 5 RXA Anemometer Receive 6 Polarity sets comms mode Connect to V for RS232 Communications mode Connect to OV for RS422 485 4 If left unconnected unit will default to RS422 485 Power V 9 30V 11 Power 0V Use also for digital comms 0V 12 Analogue Output 1 8 Analogue Output 2 14 Analogue Output 3 9 Analogue Output 4 15 PRT Excitation 19 PRT Excitation 20 PRT Sense 25 PRT Sense 26 Analogue Input 1 27 Analogue Input 2 28 Analogue Input 3 29 Analogue Input 4 24 Analogue Grounds Use the most convenient pin 10 16 17 Screens Use the most convenient pin 3 7 21 30 31 Not connected 13 18 22 23 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Cable assembly Open the pack of parts 1561 PK 050 provided with the WindMaster Strip the cable and solder the contact pins to the cores please note that the connector supplies the correct strain relief for cables with an outside diameter of 6 12mm Put the parts on the cable in the order as shown below ome el Whilst
18. e turbulence Do NOT mount the WindMaster in close proximity of high powered radar or radio transmitters A site survey may be required if there is any doubt about the strength of external electrical noise Orientation Normally the WindMaster is mounted vertically ensuring a horizontal Measuring Plane However the unit may be mounted with the Measurement Plane set to any required orientation provided the sealing gasket is fitted to the flange Alignment The reference north spar as indicated by a notch that is in the direction line with north which is also indicated on the base of the unit by another notch Corrosion Careful note should be taken of the possibility of galvanic corrosion by incorrect mounting It is vital that only stainless steel fixings are used and that the instrument is insulated from the mounting surface with the rubber gasket This will ensure that the anemometer will provide long service under extreme conditions such as marine Grounding Earthing For protection against lightning the WindMaster MUST be earthed via its mountings Cable strain relief Fit strain relief when installing such that the weight of the cable is supported and does not put a strain on the connector 23 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Flange mounting Mount the unit to a suitable surface using the flange gasket and the M6 nuts bolts and washers provided ensuring that the clearance for the c
19. f sight gt Use cables recommended by Gill If cables are cut and re connected incorrectly perhaps in a junction box then EMC performance may be compromised if cable screen integrity is not maintained gt Earth loops should not be created wire the system in accordance with the installation guidelines gt Ensure the power supply operates to the WindMaster specification at all times 6 2 Bench system test Note Prior to physically mounting the WindMaster in its final location we strongly recommend that a bench system test is carried out to confirm the system is configured correctly is fully functional and electrically compatible with the selected host system and cabling preferably utilising the final cable length The required data format units output rate and other options should also all be configured at this stage 6 3 Cable type An RS232 RS422 compatible cable as appropriate should be used with the number of twisted pairs matching the application Generic description Twisted pairs with drain wire screened with aluminised tape with an overall PVC sheath Wire size 7 0 2mm 24 AWG Gill 15m lead A nine pair 15metre lead with one end free and the other end fitted with Clipper pins is available as an accessory from Gill see 5 4 Accessories for part number The table shows some suitable manufacturers references other manufacturers equivalents can be used No of pairs Gill ref Belden ref Batt
20. follows Output Voltage Voltage Voltage Current Current 0 to 5V 2 5V 5V 4 20mA 4 20mA U V W or Polar 50 m s 0 2 5 5 4 0 50 m s 5 2 5 5 20 20 Polar wind direction wraparound The wind direction in Polar mode can be configured for either 360 or 540 Wraparound If the 360 mode is used with a chart recorder large swings of the recorder pen will be experienced each time the wind direction passes between 0 and 359 Using the 540 mode when the wind first changes from 0 to 359 there will be a step change on the output but after this first time the output will change smoothly each time the wind passes through 360 Similarly the first time the wind veers from 539 to 180 there will be a step change after which the output will change smoothly Output Voltage Voltage Current Current 0 to 5V 2 5V 4 20mA 0 20mA 360 wraparound 0 0 00 2 50 4 00 0 00 180 2 50 0 00 12 00 10 00 360 5 00 2 50 20 00 20 00 540 wraparound 0 0 00 2 50 4 00 0 00 180 1 67 0 83 9 33 6 67 360 3 33 0 83 14 67 13 33 540 5 00 2 50 20 00 20 00 29 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 10 CONFIGURING It is strongly recommended that WIND software available free from the Gill website www gill co uk is used to configure the WindMaster A less preferred option for configuring is using a terminal emulation package using com
21. ith the options fitted to the WindMaster or WindMaster Pro See Sections 8 and 9 Connection o The unit is fitted with a modified 31 way Clipper industrial plastic connector shell size 3 and supplied with a mating plug with solder bucket pins for installation by the user o The cable should be securely fixed with cable clamps or equivalent so that the cable is not under stress at the plug There are restrictions on the maximum cable lengths for correct operation See 6 4 The cable should be routed up the inside of the mounting tube See 6 3 for cable specification Power supply o The WindMaster requires a DC supply of between 9 30 V DC o Typical current drain 55 mA 12 V excluding analogue outputs WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 6 INSTALLATION 6 1 Installation Guidelines As with any sophisticated electronics good engineering practice should be followed to ensure correct operation gt Always check the installation to ensure the WindMaster is not affected by other equipment operating locally which may not conform to current standards e g radio radar transmitters boat engines generators etc gt Guidelines o Avoid mounting in the plane of any radar scanner a vertical separation of at least 2m should be achieved o Radio transmitting antennas the following minimum separations all round are suggested e VHF IMM lm e MF HF 5m e Satcom 5m avoid likely lines o
22. mand codes These are both described in the sections below Note Certain combinations of output rate baud rate and message type may be unsupported 10 1 WIND software Download the WIND software from the Gill website www gill co uk Assuming the WindMaster has been correctly connected to the PC and a Power Supply the opening menu will show the WindMaster in Measurement mode A short Start message will be displayed followed by continuous wind information displayed the default setting being Polar with the unit of measure Metres per second m s If a message similar to the one below is displayed click Tools and Synch Comms in the tool bar and the system will be synchronised and correct data displayed iok Baudrate Tools Exit About L t ptit Rt tet tet tatl jaz i ltet t a a S T i Sad aT ELS T ETE DE Has TPTEGPTSURT ETETETT ETELA Ptht i t lt gasce lt u ELETE 08 TETETCGRT TT LT PG att Gao GOR GASC TLS TCG emempoge 19200 E Anemometer Synchronised at 9600 baud If after Synch Comms there is still a problem with start up switch power to anemometer off and then on again and repeat procedure 30 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 The unit is set to factory default 1 Hz output and in Polar mode A typical message format is shown below G wind 5 x Baudrate Tools Exit About it GaPPTHTStcCGRT tt tt Gu eeGas lt e tt GH eHG asc tity WindMaster
23. nd Z The WindMaster responds with a CONFIGURATION MODE message stops reporting wind measurements and waits for a command as detailed below Returning to Measurement mode Q ENTER The WindMaster responds with wind measurements immediately when in Continuous mode or on receipt of a Poll signal when in Polled mode 34 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Checking the configuration We recommend that as a standard procedure you use this command prior to and after changing any settings It shows the current settings for most of the alterable settings bad D 3 ENTER Return to measurement mode Q ENTER The WindMaster responds with the current default settings These are shown below M2 U1 O1 L1 P1 B4 F1 H1 NQ E1 T1 S1 C2 A1 11 J1 GO K50 We suggest you note down the settings so that you can easily return to them All of these settings and how to change them are explained in the following sections Changing settings To change a setting refer to the sections below and enter the command of the new setting required followed by For example to change the message format to UVW Continuous enter ENTER If successful the new setting will be sent back as a message by the WindMaster M 1 ENTER The WindMaster will
24. nput impedance 310 K ohm in series with 2 5 V Resolution 12 14 bit as installed 8 2 PRT input Available on the WindMaster Pro only Must be specified when ordering The PRT input is designed to work with any 4 wire PRT that meets IEC60751 Pin Nos 19 PRT excitation 25 PRT sense PRT 100 26 PRT sense 20 PRT excitation 9 ANALOGUE OUTPUTS Options of four analogue inputs and outputs must be specified when ordering Information on how to change the formats and all the settings follows in Section 10 CONFIGURING Output allocations Each of the outputs can be configured to one of the following Polar direction Polar magnitude U V W Speed of Sound Status 28 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Output types They are user configurable as Voltage OV to 5V or 2 5V to 2 5V or 5V to 5V or Current 4 20 mA or 0 20mA Voltage outputs The output impedance is less than 1 ohm To prevent inaccuracies the outputs should be connected to an input with an impedance greater than 10KQ Current outputs Important When using the current outputs the load resistance between the Output and Ground must be lt 250 ohms including cable resistance This is to ensure that the voltage levels on the Analogue outputs does not exceed 5V Scaling This is user configurable to 5 10 20 30 40 50 60 or 120 m s full scale Using 50m s as an example this defines the outputs as
25. ommand letter will cause the current settings to be output Warning Certain combinations of output rate baud rate and message type may be unsupported 36 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Ax Select SOS Sonic Temp output RW N Neither SOS Sonic Temp Both The SOS and or Sonic Temp is displayed after the UNITS and before the status byte the SOS is always in m s and the Sonic Temp is always in deg C Bx Set Baud rate Dn nn F amp F WN 2400 4800 9600 19200 38400 57600 If a request is sent to change the Baud rate before it changes it must be confirmed by entering B Baud rate eg If set to B3 9600 baud to change to B5 38400 baud enter and confirm by entering B ENTER B nN IENTER NOTE a random echo may be generated after the B5 confirmation ENTER at the new change host terminal to 38400 baud Certain combinations of output rate baud rate and message type may be unsupported Cx Analogue output polar direction wrapping 1 2 540 degree wraparound on analogue output 360 degree wraparound on analogue output Dx Diagnostic and configuration information NYDN PWN Request serial number Request SW version Request current configuration Initiate a self test Report DAC channel configuration 37 WindMaster and WindMaster
26. onnector is maintained as shown on Figure 3 Three M6 Bolts and Washers Supplied by Gill M6 Fixings Equi spaced on a 85mm PCD Base Gasket Supplied by Gill Bracket Supplied by Customer Clearance for Connector Should Extend at Least 100mm Below Surface Pipe mount adaptor The pipe mount adaptor enables the WindMaster to be fitted directly to a standard 1 5 inch BSP pipe Pipe size OD 1 9 ID 1 5 wall thickness 0 2 The pipe mount adaptor must be ordered from Gill The WindMaster connector must be connected to the WindMaster before the pipe mount adaptor is attached to the WindMaster Pass the cable fitted with the 31 way Clipper plug through the tube Connect the plug by twisting it whilst pushing it gently into the socket on the WindMaster When it locates twist the outer sleeve clockwise to connect and lock the plug Fix the pipe mount adaptor to the pipe using the 2 stainless steel screws provided Note the customer MUST fit appropriate strain relief to the cable this is particularly important with pipe mounting Mount the WindMaster unit to the pipe mount adaptor using the flange gasket and the M6 nuts bolts and washers provided 24 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Fig 4 Pipe Mount Adaptor Gill Pipe Mount Adapter Two M8 Fixing Bolts Supplied by Gill Customer Supplied Pipe 1 OD 48 3mm ID 38 1mm 25 WindMaster and WindMaster Pro 1561
27. p 1 Decide on an available Com port that you want to use Usually Com1 2 Run Hypertrm exe Typically accessed via Start gt Programs gt Accessories gt Communications gt Hyperterminal 3 Create a New Connection File gt New Connection 4 Entera Name eg WindMaster 5 Change Connect Using to Direct to Com 1 or other Com port as required 6 Adjust the Port settings to match WindMaster settings WindMaster default settings are Bits per second 19200 Data bits 8 Parity None Stop bits 1 Flow Control Handshaking None Assuming the WindMaster has been correctly connected to the PC and a Power Supply the opening menu will show the WindMaster in Measurement mode A short Start message Figure 9 will be displayed followed by continuous wind information displayed the default setting being Polar with the unit of measure Metres per second m s DEMONSTRATION UNIT Gill Instruments Ltd 2306 104 RS485 AUTO CHECKSUM ROM 71A2 71A2 PASS CHECKSUM FAC 827 0827 PASS A 9 CHECKSUM ENG ED8 OED PASS Figure CHECKSUM CAL 2FCE 2FCE PASS Typical Start message 80 000 13 000 12 K 00 53 80 306 000 18 000 15 K 00 12 80 334 000 17 000 11 K 00 06 6Q 000 13 000 14 K 00 51 GQ 000 11 000 18 K 00 61 80 340 000 26 000 19 K 00 15 80 042 000 19 000 24 K 00 12 Entering Configuration mode From Continuous mode ia From Polled mode NI where N is the Unit identifier a letter between Q a
28. rmal output data and that the Status Code is OK 00 If the status code is other than 00 or 11 refer to Section 11 5 Status error codes Use an office fan or similar to check that the unit is sensing wind turning the unit to simulate changing wind direction and to check that all three axes are functioning re ee NS 6 Note that this a quick functional test There are no calibration adjustments See 12 2 Note Refer to Dx diagnostic and configuration information for further self tests 12 2 Calibration Note There are no in use calibration adjustments the unit is designed NOT to require re calibration within its lifetime Standard calibration Accuracy at 12 m s Wind speed 1 5 RMS Direction 2 Certified calibration The unit can be Wind tunnel calibrated in accordance with ISO 16622 with traceability to national standards This should be specified when ordering or the unit can be returned to Gill Instruments for retrospective calibration Accuracy at 12 m s Wind speed 1 RMS Direction 0 5 13 APPENDICES 13 1 Guarantee For terms of guarantee contact your supplier Warranty is void if the red security seal covering base nuts is damaged or broken or the transducer caps have been damaged 43 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 13 2 ELECTRICAL CONFORMITY im EC DECLARATION OF CONFORMITY ACCORDING wE w TO COUNCIL DIRECTIVE 89 336 EEC INSTRUMENTS We Gill Instruments L
29. s the sonic temperature can be derived from the formula Ts Cy 403 Where Ts Sonic temperature C Speed of sound Note the formula does not account for the effect of Humidity Figure 2 shows the direction and polarity of the U V and W axes WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Polar definition The wind speed in the UV plane with direction in degrees from 0 to 359 with respect to the Reference spar which is normally aligned to North U V and W axes definition U is defined as towards the direction in line with the north spar as indicated in the diagram V is defined as towards the direction of 90 anti clockwise from N the Reference spar W is defined as vertically up the mounting shaft WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Effects of temperature barometric pressure rainfall and humidity The calculated u v and w components are independent of temperature pressure rainfall amp humidity within the operating parameters of the WindMaster The calculated sonic temperature speed of sound should be corrected by the user for humidity to provide and indication of ambient temperature Measurement sequence The table shows the firing sequence of the transducers Measurement Sequence The sample rate is automatically selected to either 32 or 40 Hz depending on the output rate configured Measurement Period Ultrasonic Measurement Axis
30. sabled Hx Enable Disable power on message 1 Power on message enabled 2 Power on message disabled If the power up message is On then a message similar to that below is output whenever the unit goes into Measurement mode ie when power is first applied to the unit or the unit returns to Measurement mode from Configuration mode DEMONSTRATION UNIT Gill Instruments Ltd 2306 104 RS485 AUTO CHECKSUM ROM 71A2 71A2 PASS CHECKSUM FAC 0827 0827 PASS CHECKSUM ENG ED8 OED PASS CHECKSUM CAL 2FCE 2FCE PASS If any of these checksums fail the word PASS will be replaced by FAIL and the unit will use its default settings If the checksum repeatedly fails after power on contact your supplier 38 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Ix Enable Disable analogue input message 1 Analogue input data off 2 Analogue input data on Jx Set the unit Resolution 1 Select Normal Resolution 2 Select High resolution Kxx Set Minimum direction velocity This allows the minimum wind velocity to be set at which display of the direction is enabled in thousandth of a metre per second The default is 50 which means that any wind magnitude lt 0 05m s will have the wind direction omitted in polar mode The maximum value allowed for this is 5000 or 5m s Lx Message Terminator 1 lt CR gt lt LF gt 2 lt CR gt Mx Message Forma
31. squeezing the red retainers in the direction of ARROW A pull in the direction of ARROW B Your connector should now resemble the connector in the picture above WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Insert each contact pin until you feel a slight click If you have inserted the contact into the incorrect hole it can be removed at this point by simply pulling it out Please note there will be some resistance Continue to insert all of the contacts you require in accordance with the diagram below Connector Pin amp Conductor positions VIEW ON PIN INSERTION SIDE OF CONNECTOR The drawing above shows the pin positions amp the colour of the wire conductors together with position of conductor screens This information must be used on conjunction with the information shown in 6 5 connections If the PRT option is selected you may have to sacrifice two analogue inputs or outputs WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Once all of the contacts are inserted push the red retainer into place NB The retainer can only be pushed back into place if the contacts are fully engaged Fit the connector to the WindMaster so that you can now finish assembling the connector Screw the back shell onto the connector until it is fully in place Please note that the final rotations can be slightly stiff Screw the cable clamp into the back shell 16 WindMaster and WindMaster
32. t 1 UVW 2 Polar 3 UVW Polled 4 Polar Polled 5 NMEA Nx Set unit ID Sets the unit ID displayed at the start of all GILL communications strings Set Q Z Command N lt Q gt Ox Set ASCII output format 1 Comma separated format 2 Fixed field 39 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Px Set output rate Rate is 1 Hz 40Hz Sampling Rate is 2 Hz 40Hz Sampling Rate is 4 Hz 40Hz Sampling Rate is 5 Hz 40Hz Sampling Rate is 8 Hz 32Hz Sampling Rate is 10 Hz 40Hz Sampling Rate is 16 Hz 32Hz Sampling Rate is 20 Hz 40Hz Sampling Rate is 32 Hz 32Hz Sampling O ON HD Nn BW NH m 20 Rate is 1 4 Hz 21 Rate is Hz Sx Analogue output range This sets the velocity scaling for the analogue output Full range is 5m s Full range is 10m s Full range is 20m s Full range is 30m s Full range is 40m s Full range is 50m s Full range is 60m s Full range is 120m s o uN Nn BW YN Tx Set analogue output type OV to 5V range 2 5V to 2 5V range 4mA to 20mA range 5V to 5V range OmA to 20mA range nA A U N m Ux Set units 40 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 1 m s 2 Knots 3 MPH 4 KPH 5 FPM Vx Enable Disable PRT 1 OFF 2 ON 11 MAINTENANCE amp FAULT FINDING 11 1 Cleaning If there is any build up of deposit on
33. td declare our under sole responsibility that the products WindMaster 1590 PK 020 options WindMaster Pro 1561 PK 020 options Manufactured by Gill Instruments Ltd Saltmarsh Park 67 Gosport Street Lymington S041 9EG to which this declaration relates are in conformity with the protection requirements of Council Directive 89 336 EEC on the approximation of the laws relating to electromagnetic compatibility This Declaration of Conformity is based upon compliance of the product with the following harmonized standards Emissions EN 61326 Immunity EN 61326 Signed by A C R Stickland Director Date of issue 27 06 2006 Place of issue Gill Instruments Ltd Saltmarsh Park 67 Gosport Street Lymington S041 9EG 44
34. th set to the same protocol RS232 RS422 One way communication or RS485 Check wiring is in accordance with the manual Failed Incorrect Check that transducer path is not blocked WindMaster output data invalid flag 11 4 Returning unit If the unit has to be returned it should be carefully packed in the original packaging and returned to your authorised Gill distributor with a full description of the fault condition 11 5 Status error codes The Status code is sent as part of each wind measurement message Code Status Condition 00 OK Functioning correctly 01 Sample failure Insufficient samples in average period from transducer pair 1 02 Sample Failure Insufficient samples in average period from transducer pair 2 03 Sample Failure Insufficient samples in average period from transducer pair 3 04 Sample Failure Insufficient samples in average period from transducer pairs 1 2 05 Sample Failure Insufficient samples in average period from transducer pairs 1 3 06 Sample Failure Insufficient samples in average period from transducer pairs 2 3 07 Sample Failure Insufficient samples in average period from all transducer pairs 42 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 12 TESTS 12 1 Bench test Couple the WindMaster to the host system and power supply using a known working test cable Check that the unit is correctly configured see Section 10 Check for no
35. the unit it should be gently cleaned with a cloth moistened with water and soft detergent Solvents should not be used and care should be taken to avoid scratching any surfaces The unit must be allowed to defrost naturally after being exposed to snow or icy conditions do NOT attempt to remove ice or snow with a tool 11 2 Servicing There are no moving parts or user serviceable parts requiring routine maintenance Opening the unit or breaking the security seal will void the warranty and the calibration In the event of failure prior to returning the unit to your authorised Gill distributor it is recommended that 1 All cables and connectors are checked for continuity bad contacts corrosion etc 2 A bench test is carried out as described in Section 12 1 3 You contact your supplier for advice 41 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 11 3 Fault finding Symptom Solution Check DC power to WindMaster cable and connections Check comms settings of WindMaster as detailed in Section 10 and host system match including correct Com port Neca Check unit is in Continuous mode Check that in line communication devices are wired correctly NOTE It is usual for Anemometer TX to be connected to converter device RX Check comms settings of WindMaster and host system match Corrupted output Try a slower baud rate Check cable lengths and type of cable Check WindMaster and host system are bo
36. tion 23 Alignment 23 Corrosion 23 Grounding Earthing 23 Cable strain relief 23 Flange mounting 24 Pipe mount adaptor 24 7 MESSAGE FORMATS 26 7 1 Gill format Polar Continuous Default format 26 WindMaster node address 26 Horizontal wind direction 26 Horizontal wind speed 26 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Vertical wind speed 26 Units 26 Speed of Sound SOS 27 Sonic temperature 27 Status 27 Checksum 27 Output rate not displayed 27 7 2 Gill format UVW Continuous 27 7 3 Gill format Polled Polar or UV 27 8 ANALOGUE INPUTS 28 8 1 Analogue Inputs 28 8 2 PRT input 28 9 ANALOGUE OUTPUTS 28 Output allocations 28 Output types 29 Voltage outputs 29 Current outputs 29 Scaling 29 Polar wind direction wraparound 29 10 CONFIGURING 30 10 1 WIND software 30 10 2 Configuring using Hyperterminal 34 Setting up 34 Entering Configuration mode 34 Returning to Measurement mode 34 Checking the configuration 35 Changing settings 35 Command List 36 11 MAINTENANCE amp FAULT FINDING 41 11 1 Cleaning 41 11 2 Servicing 41 11 3 Fault finding 42 11 4 Returning unit 42 11 5 Status error codes 42 12 TESTS 42 12 1 Bench test 43 12 2 Calibration 43 Standard calibration 43 Certified calibration 43 13 APPENDICES 43 13 1 Guarantee 43 13 2 Electrical Conformity 44 EC DECLARATION OF CONFORMITY ACCORDING 44 1 FOREWORD Thank you for purchasing a
37. tude of wind speed in the W axis See Fig 2 Units The Units identifier shows the units in which the wind speeds are measured Units Identifier Metres per second default M Knots N Miles per hour P Kilometres per hour K Feet per minute F 26 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Speed of Sound SOS If enabled this is displayed in metres per second Sonic temperature If enabled this is displayed in degrees C Status This indicates either correct operation Code 00 or status code See 11 5 for explanation of codes Checksum This enables the host system to check that the data has been correctly received This is the EXCLUSIVE OR of the bytes between and not including the lt STX gt and lt ETX gt characters lt STX gt Start of string character ASCII value 2 lt ETX gt End of string character ASCII value 3 Output rate not displayed The WindMaster delivers wind information at rates from 1 default setting to 32 outputs second The sample rate 40 or 32 Hz is chosen automatically to be an appropriate multiple of the output rate Data can be instantaneous or averaged see section 10 7 2 Gill format UVW Continuous In this mode the wind speed outputs are given as signed ie positive or negative speeds along the U axis V axis and the W vertical axis The definition of the U V and W axis are shown in Figure 2 lt STX gt Q 0
38. ur Analogue outputs 12 or 14 bit specify 14 bit Four Analogue inputs 12 or 14 bit specify 14 bit PRT input Not available Specify when ordering Wind tunnel calibration Specify when ordering Specify when ordering traceable to national standards Units may be returned to Gill for Wind tunnel calibration 5 4 Accessories Item Part No Travelling case Portable protective case 1210 30 074 Spare 31 way Clipper connector 1561 PK 050 Spare 15m lead one end free other end fitted with Clipper pins 1561 10 018 Power Supply and Interface Unit PCI 1189 PK 021 Pipe mount adaptor 1561 30 025 5 5 Packaging Whilst the WindMaster is being moved to its installation site the unit should be kept in its packaging All the packaging should be retained for use if the unit has to be returned at any time Note that if the WindMaster is to be regularly moved around a travelling case is available as an optional extra 5 6 Installation requirements PC requirement The new WIND software will operate with any PC with Windows software from Windows 98 onwards The PC must be fitted with a suitable interface to match the chosen communication format RS232 RS422 or RS485 Alternatively a Gill Power Supply and Interface PCI may be used to convert RS422 485 output to RS232 WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 Other equipment Analogue inputs outputs must be compatible w
39. uracy 12 m s to special order Speed of Sound Range Resolution Accuracy Power requirement Digital output Protocol ASCII Baud rates Analogue outputs optional 4 channels Selectable range Output type Analogue inputs optional Up to 4 single ended or 2 differential Input range Sonic temperature Range General Weight Size Environmental Operating temperature Humidity Precipitation EMC WindMaster 1 2 4 8 10 16 20 32 option Hz 32 or 40 Hz m s mph KPH knots ft min UVW or Polar Flexible 0 3600 s 0 45 m s 0 01 or 0 001 m s lt 1 5 RMS lt 1 0 RMS 0 359 9 1 or 0 1 20 0 5 300 370 m s 0 01 m s lt 0 5 20 C 9 30 Vdc 55 mA 12 Vdc excluding analogue outputs RS232 RS422 RS485 network up to 8 anemometers 2400 57600 Resolution 12 or 14 bit User selectable full scale wind speed 0 20 mA 4 20 mA 0 5 V 5 V 0 2 5V Resolution 12 or 14 bit 5 V 40 C to 70 C 1 0 kg 750 mm x 240 mm IP65 40 C to 70 C lt 5 to 100 Operation up to 300 mm hour Emissions BS EN 61000 6 3 Immunity BS EN 61000 6 2 WindMaster Pro 1 2 4 8 10 16 20 32 Hz 32 or 40 Hz m s mph KPH knots ft min UVW or Polar Flexible 0 3600 s 0 65 m s 0 01 or 0 001 m s lt 1 5 RMS lt 1 0 RMS 0 359 9 1 or 0 1 70 0 5 300 370 m s 0 01 m s lt 0 5 20 C 9 30 Vde 55 mA
40. utput channels 12 or 14 bit resolution for WindMaster 14 bit resolution for WindMaster Pro A PRT input is also available WindMaster Pro only Units may additionally be calibrated in a wind tunnel to ISO 16622 traceable to national standards WIND software is available free from the Gill website www gill co uk It is strongly recommended as it provides an easy user friendly interface WindMaster and WindMaster Pro 1561 PS 0001 Issue 2 August 2006 3 PRINCIPLE OF OPERATION TIME OF FLIGHT THEORY Therefore L Distance between transducer faces C Speed of sound V Velocity of gas flow T1 Transit time of ultrasound T2 Transit time of ultrasound Figure 1 Time of Flight details The WindMaster measures the times taken for an ultrasonic pulse of sound to travel from an upper transducer to the opposite lower transducer and compares it with the time for a pulse to travel from lower to upper transducer Likewise times are compared between each of the other upper and lower transducers As Figure shows the air velocity along the axis between each pair of transducers can then be calculated from the times of flight on each axis This calculation is independent of factors such as temperature From the three axis velocities the wind speed is calculated as either signed U V and W or as Polar and W It can be seen from Figure 1 that the speed of sound in air can be calculated from the times of flight From thi
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