USER'S GUIDE Vaisala WINDCAP® Ultrasonic Wind Sensor WS425 M210361EN-E
PUBLISHED BY Vaisala Oyj P.O. Box 26 FI-00421 Helsinki Finland Phone (int.): +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www.vaisala.com/ © Vaisala 2010 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. The contents are subject to change without prior notice.
________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION............................................................................ 7 About This Manual ................................................................... 7 Contents of This Manual ....................................................... 7 Version Information ............................................................... 8 Feedback.......................................
USER'S GUIDE____________________________________________________________________ Factory Settings...................................................................22 RS-232 Default Settings for USA ...................................22 Default Settings of RS-232, RS-422, and RS-485 for Europe ............................................................................23 Mounting..............................................................................26 Mounting Procedure on a 1-inch IPS Vertical Pipe.
________________________________________________________________________________ Impedance........................................................................... 52 SDI-12 Communications Protocol....................................... 53 Baud Rate and Byte Frame Format .................................... 53 Two Different Submodes..................................................... 54 Standard SDI-12 Commands Supported by WS425 .......... 55 Acknowledge Active Command (a!)..............................
USER'S GUIDE____________________________________________________________________ List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Different Wind Speed and Direction Presentations ..................18 Mounting the Sensor to Adapter...............................................24 WS425 Main Dimensions .........................................................
Chapter 1 ________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the product. About This Manual This manual provides information for installing, operating, and maintaining the WS425 Ultrasonic Wind Sensors. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the product.
USER'S GUIDE____________________________________________________________________ Version Information Table 1 Manual Revisions Manual Code U428en-1.1 M210361en-A M210361en-B M210361EN-C M210361EN-D M210361EN-E Description Applicable to Models WAS425A and WAS425AH Firmware versions 1.04. Previous version of the manual. Corrections to Table 8, Figure 11, and to the measurement range of the wind speed in the technical data.
Chapter 1 ________________________________________________________ General Information Table 2 Sensor Ordering Options vs. Supported Data Outputs Sensor Ordering Options Sensor Cable WS425 x 1 ... (Analog/ SDI-12/RS-232USA) SDI-12 cable Analog cable RS-232 cable WS425 x 2 ... (RS-232/ RS-485/RS-422 RS-232 cable RS-422/ RS-485 cable Table 3 Supported Operating Modes SDI-12 submode A SDI-12 submode B Analog mode Supported Data Outputs SDI-12 standard commands WS [Hz] 0 ... 65 WS [V] 0 ...
USER'S GUIDE____________________________________________________________________ Safety General Safety Considerations Throughout the manual, important safety considerations are highlighted as follows: WARNING Warning alerts you to a serious hazard. If you do not read and follow instructions very carefully at this point, there is a risk of injury or even death. CAUTION Caution warns you of a potential hazard.
Chapter 1 ________________________________________________________ General Information Table 4 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Maximum Voltages Min. volts Max. volts -0.3 -0.3 5.3 5.3 -12.0 -12.0 -0.5 -0.5 -10.0 -10.0 -0.5 -5.0 20.0 20.0 18.0 5.3 12.0 12.0 5.3 42.0 Ordering Options WS425 x 2 ... Ground Ground Ground N/C Jumper Jumper Ground Ground Digital Output Digital Input +12 V Power Digital Output N/C Digital Input N/C Heater Power WS425 x 1 ...
USER'S GUIDE____________________________________________________________________ Regulatory Compliances The Vaisala WS425 Ultrasonic Wind Sensor has been tested to fulfill the following regulatory compliances. Also mentioned here are some thirdparty tests that involved field testing of the sensor.
Chapter 1 ________________________________________________________ General Information Third-Party Testing (Field Tests Included) NWS ASOS Mechanical Wind Sensor Replacement Vaisala has participated in a three-year test program conducted by the U.S. National Weather Service ASOS Program group. The NWS has conducted a variety of tests including wind tunnel tests from 0 to 120 knots and field tests in various locations.
USER'S GUIDE____________________________________________________________________ Trademarks Vaisala WINDCAP® is a registered trademark of Vaisala Oyj. Windows® is a registered trademark of Microsoft Corporation in the United States and/or other countries. License Agreement All rights to any software are held by Vaisala or third parties. The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement.
Chapter 2 __________________________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter describes the features of the WS425 Ultrasonic Wind Sensors. Introduction to WS425 Measuring Principle The WS425 Ultrasonic Wind Sensor has an on-board microcontroller that captures and processes data and performs serial communications. The wind sensor has an array of three equally spaced ultrasonic transducers on a horizontal plane.
USER'S GUIDE____________________________________________________________________ Measuring the six transmit times allows wind velocity to be calculated for each of the three ultrasonic paths, which are offset to each other by 120°. The calculated wind speeds are independent of altitude, temperature, and humidity because they cancel out with the six measurements even though the velocity of sound affects individual transit times.
Chapter 2 __________________________________________________________ Product Overview Sensor Features Some of the sensor features depend on the WS425 operating mode. Table 5 below outlines where the features are available.
USER'S GUIDE____________________________________________________________________ Polar Wind Speed and Direction The wind speed (WS) is represented as a scalar speed in selected units (m/s, kt, mph, km/h). The wind direction (WD) is expressed in degrees (°).
Chapter 2 __________________________________________________________ Product Overview speed measurement taken over the preceding averaging interval is summed and the sum is then divided by the number of measurements. The sensor computes the true running average. If the Data Acquisition System requests data before the initial averaging interval completes, the sensor returns the best possible running average.
USER'S GUIDE____________________________________________________________________ specify a direction coast speed between 0.0 and 9.9 units of measurement. Use 0.0 if coasting is not required. For example, making the direction coast speed = 2.0. The consecutive measurements are presented in Table 6 below. Table 6 Wind Direction Coasting Measured Wind Speed Measured Wind Direction 3.5 350 2.5 340 2.2 340 1.9 175 1.2 045 2.
Chapter 3 _______________________________________________________________ Installation CHAPTER 3 INSTALLATION This chapter provides you with information that is intended to help you install this product. Selecting Location WS425 Ultrasonic Wind Sensor should be installed in a location that is free from turbulence caused by nearby objects, such as trees or buildings. Ideally, the sensor should be higher than any other object within the horizontal radius of 300 m.
USER'S GUIDE____________________________________________________________________ CAUTION A transducer is located at the top of each of the three arms. Be careful not to damage any of the transducers. Dropping the sensor can break or damage the transducer or the arms will bend and they cannot be realigned. Damage can also be caused if the transducers are twisted (the transducers are not screwed into the arms).
Chapter 3 _______________________________________________________________ Installation Default Settings of RS-232, RS-422, and RS-485 for Europe Operation Mode: Wind Speed Units: Average Interval (seconds): Averaging Method: Output Interval (seconds, 0 for polled): Sensor ID Character: Wind Direction Coast Threshold (speed units): Head Orientation: Baud Rate: Parity: Data Bits: NMEA Extended Meters/Second 3 Scalar 1 A 0.0* Up 9600b None 8 * 0.
USER'S GUIDE____________________________________________________________________ 0311-011 Figure 2 Mounting the Sensor to Adapter The following numbers refer to Figure 2 above. 1= 2= 3= 4= 5= 6= 7= Sensor body Cable connector Spacer ring 3/16 inch Hex-socket bolt or standard screw Sensor adapter Fastening clamp Vertical tube The dimensions of the adapter are illustrated in Figure 3 on page 25.
Chapter 3 _______________________________________________________________ Installation 0212-045 Figure 3 WS425 Main Dimensions The dimensions are in millimeters.
USER'S GUIDE____________________________________________________________________ Mounting Mounting Procedure on a 1-inch IPS Vertical Pipe Use the following procedure to mount the sensor normally to a vertical 1inch International Pipe Standards (IPS) pipe. WS425FIX30 is suitable for the 1-inch IPS vertical pipe and WS425FIX60 is suitable for a 60-mm vertical pipe (Europe). See Figure 2 on page 24 for details. To mount the sensor, do the following: 1. 2. 3. 4. 5. 6.
Chapter 3 _______________________________________________________________ Installation Alignment Magnetic Declination Correction One transducer arm is permanently marked with an N for north and another with an S for south. NOTE Aligning might be easier if you mark the sensor body, for example, with paint or colored tape, to indicate north and south so that it can be seen from the ground.
USER'S GUIDE____________________________________________________________________ 0212-048 Figure 5 Suunto Compass MC-2 Compass Alignment with a Mast Adapter The following steps aim the wind sensor when using the 1-inch adapter for mounting. 1. 2. 3. 4. Use the compass to determine that the N-S transducer heads of the ultrasonic wind sensor are exactly in line with the compass. Adjust the heads by moving them to the left or right.
Chapter 3 _______________________________________________________________ Installation 0208-025 Figure 6 Correctly Aligned WS425 Ultrasonic Wind Sensor VAISALA _______________________________________________________________________ 29
USER'S GUIDE____________________________________________________________________ 0208-024 Figure 7 Adjusting the N-S Heads The following letters refer to Figure 7 above. A = The installer is too far to the left. B = The installer is in line with the sensor. C = The sensor's appearance is shown when the installer is in the correct position. The sensor, however, is not correctly aligned.
Chapter 3 _______________________________________________________________ Installation Connections WS425 has a 16-pin circular plastic connector (male) at the bottom of the sensor. A cable connector of type AMP206037-1 can be used to attach wires to the sensor pins. CAUTION When WS425 is installed upside down, always make sure the connector is protected from rain and snow. Table 8 below illustrates usage of the pins with different protocols. Table 8 WS425 Sensor Pins Sensor Pin No.
USER'S GUIDE____________________________________________________________________ 0212-041 Figure 8 Open-Lead Cables for WS425 Sensors For 10-meter cables that are available from Vaisala, see section Technical Data on page 79. Choose the cable according to the desired communication protocol.
Chapter 3 _______________________________________________________________ Installation Powering Power Supplies You can use any 12 VDC power supply with the unheated Ultrasonic Wind Sensor, as long as it meets all applicable safety regulations. Typically, the power supply is a fused 12 V battery with either a solar panel charger or a trickle charger. The power supply must be capable of delivering 155 mA current spikes.
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Chapter 4 ________________________________________________________________ Operation CHAPTER 4 OPERATION This chapter explains the operation and programming of WS425. Analog Mode The WS425 Ultrasonic Wind Sensor can be used as a conventional wind set that gives instantaneous readings. The sensor is normally powered down. When power is first turned on, it takes about two seconds for the sensor to initialize and stabilize. Then the sensor takes a 0.
USER'S GUIDE____________________________________________________________________ 0212-039 Figure 9 Frequency Connection The wind speed output at pin 15 is a voltage that varies linearly from 0 VDC at 0 mph to 1 VDC at 125 mph. In SI units, the voltage varies linearly from 0 VDC at 0 m/s to 1 VDC at 55.88 m/s.
Chapter 4 ________________________________________________________________ Operation NOTE The wind speed voltage output cannot be used simultaneously with the frequency output. If the voltage output pin 15 is used, the frequency output pin 14 must be connected to ground, see Figure 10 on page 36. Wind Direction The DC reference voltage that inputs the sensor at pin 12, produces a voltage that represents the wind position. The reference voltage must be in the range of 1.0 to 4.0 VDC.
USER'S GUIDE____________________________________________________________________ Serial Mode Overview You can use any computer or data logger that has a serial port to collect the sensor data by using the serial commands. The communication speed, parity, and number of data bits for the serial line can be selected by the user. The sensor can be set to transmit data messages at predefined intervals (autosending) or it responds to a polling string, which is specific to a selected output message format.
Chapter 4 ________________________________________________________________ Operation Serial Mode Default Settings for Europe Operation Mode: Wind Speed Units: Average Interval (seconds): Averaging Method: Output Interval (seconds, 0 for polled): Sensor ID Character: Wind Direction Coast Threshold (speed units): Head Orientation: Baud Rate: Parity: Data Bits: NOTE NMEA Extended Meters/Second 3 Scalar 1 A 0.
USER'S GUIDE____________________________________________________________________ Vaisala WS425 Ultrasonic Anemometer Firmware Version v6.00 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Operation Mode: WAT11 Wind Speed Units: Meters/Second Average Interval (seconds): 3 Averaging Method: Vector Output Interval (seconds, 0 for polled): 0 Sensor ID Character: A Wind Direction Coast Threshold (speed units): 1.
Chapter 4 ________________________________________________________________ Operation Handar RS-232 When the sensor uses the Handar RS-232 message, it responds to polling commands used for requesting data from the sensor. Table 9 below summarizes these commands. Table 9 Command I Wx Ux The Handar RS-232 Polling Commands Name Identify Measurement Measurement unit change Page 41 41 43 Identify Command I The identify command is I.
USER'S GUIDE____________________________________________________________________ Table 10 Character position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 NOTE The RS-232 19-character Fixed Length Output Message Message “☻” 02H (, start of transmission) “W” “5” for 5-second running average “P” for “pass” “F” for “fail” Wind direction (most significant digit) Wind direction (middle digit) Wind direction (least significant digit) Wind speed (most significant digit) Wind speed (next digit) Wind speed
Chapter 4 ________________________________________________________________ Operation Measurement Unit Change Command Ux The measurement unit change command is Ux. where x x x x = = = = 0, for miles per hour, [mph] 1, for knots (default), [knot] 2, for kilometers per hour, [km/h] 3, for meters per second, [m/s] The following is an example: U3 It sets meters per second for wind speed. NMEA Standard The standard variable length, comma-separated, MWV wind message is defined by NMEA 0183 V2.
USER'S GUIDE____________________________________________________________________ Missing Readings If data is missing due to a measurement problem, the NMEA messages will only show the commas (,) between the data fields. Thus, NMEA is a variable-length data message.
Chapter 4 ________________________________________________________________ Operation In NMEA Extended Message, the polling can be done using the following command: $WIPQ,* where $WIP = Fixed text = Is the data ID; A … Z Q = Fixed text * = Fixed text = Checksum (8-bit XOR, excluding $ and *) = Carriage return code, ASCII 0DH = Line feed code, ASCII 0AH Table 11 Checksum Table ID Character A B C D E F G H I J K L M N O NOTE Checksum P
USER'S GUIDE____________________________________________________________________ WAT11 Message The fixed length format of the WAT11 message is defined as follows: where = Start of text character (1 digit) = Sensor identification character, for example, A (one digit). = Wind speed (in m/s) multiplied by 10, for example, 045 is 4.5 m/s (three digits).
Chapter 4 ________________________________________________________________ Operation Wind Speed Units There are four wind speed units available: NOTE a. Miles/hours b. Knots c. Kilometers/hours d. Meters/seconds When the operation mode is WAT11 (selected from the configuration parameter 1), the only option for the wind speed unit is meters/second as the WAT11 message does not contain wind speed unit information.
USER'S GUIDE____________________________________________________________________ The microprocessor translates this circular function to a linear function, that is, 359° + 5° is translated to 364° and 0° - 5° translates to - 5°. To calculate the scalar average wind direction, each translated wind direction measurement taken over the preceding averaging interval is summed and the sum is divided by the number of measurements.
Chapter 4 ________________________________________________________________ Operation Wind Direction Coast Threshold At very low wind speeds, the measured wind direction is meaningless. Therefore, you can specify a direction coast speed. When the measured wind speed drops below the direction coast speed, the calculations use the last wind direction that occurred while the wind speed WS at or above the direction coast speed to average wind direction. You can specify a direction coast speed between 0.0 and 9.
USER'S GUIDE____________________________________________________________________ The new bit rate setting is activated as soon as the configuration changes are saved (selection 12) and operation is resumed (selection 14). For the first 5 seconds after powering up the sensor, the serial line parameters are 9600b, 8, N, 1. NOTE Parity The following options are available: - None - Odd - Even Data Bits The available options are 7 or 8 data bits.
Chapter 4 ________________________________________________________________ Operation Resume Operation After opening the configuration menu, return to the current mode of operation by selecting "Resume Operation". This selection terminates the configuration dialog. NOTE Changes to the configuration will not be saved automatically. Use the SAVE CONFIGURATION command to save the changes. SDI-12 Protocol SDI-12 is a standard for interfacing data recorders with microprocessorbased sensors.
USER'S GUIDE____________________________________________________________________ NOTE With Vaisala SDI-12 cable, code WS425CAB SDI the lead colors are as follows: data - whi/yel; ground - Blk; and 12-volts - Brn. The SDI-12 bus is can have at least 10 sensors connected to it. The bus topology is a parallel connection, where each of the 3 wires of different sensors are connected in parallel. Serial Data Line The data line is a bi-directional, three-state, data transfer line.
Chapter 4 ________________________________________________________________ Operation SDI-12 Communications Protocol SDI-12 data recorders and sensors communicate by an exchange of ASCII characters on the data line. The data recorder sends a break to wake up the sensors on the data line. A break is continuous spacing on the data line for at least 12 milliseconds. The data recorder then sends a command. The sensor, in turn, returns the appropriate response. Each command is for a specific sensor.
USER'S GUIDE____________________________________________________________________ Two Different Submodes Vaisala WS425 is designed to work in two different operational modes when running the SDI-12 protocol. These modes will be called "submode A" and "submode B". This arrangement makes it possible to do the following: - Keep the sensor in a sleep mode when measurement is not active, thus enabling a very low-power operation of the sensor (submode A). - Initiate periods where continuous measurement is made.
Chapter 4 ________________________________________________________________ Operation Standard SDI-12 Commands Supported by WS425 Acknowledge Active Command (a!) This command is used to ensure that a sensor is responding to a data recorder or another SDI-12 device. It asks a sensor to acknowledge its presence on the SDI-12 bus. The command is the following: a! where a ! = = The sensor address. Terminates the command. The response is the following: a where a = = The sensor address.
USER'S GUIDE____________________________________________________________________ Send Identification Command (aI!) This command is used to query sensors for their SDI-12 compatibility level, model number, and firmware version number. The following is an example of the command: aI! where a I ! = = = The sensor address. The send identification command Terminates the command. The following is an example of the response: allccccccccmmmmmmvvvxxx . . .
Chapter 4 ________________________________________________________________ Operation The command is the following: ?! where ? ! = = Wildcard. Terminates the command. The response is the following: a where a = = The sensor address. Terminates the response. Change Address Command (aAb!) This command changes the address of a sensor. After this command has been issued and responded to, the sensor is not required to respond to another command for one second.
USER'S GUIDE____________________________________________________________________ Start Measurement Command (aM!) With this command, the sensor will make a measurement. The sensor will not return the measurement to the data recorder after this command. It shows the time after which the measurement result can be retrieved using the D0! command and it also shows the number of parameters. The following is an example: >0M! 00015 The SEND DATA (D0!) command must be issued to get the measurements.
Chapter 4 ________________________________________________________________ Operation received. The expected number of measurements is the one that WS received by the data recorder in response to an M! or V! command. Multiple data requests are not needed with WS425, since all return values fit easily into one response string. The command is the following: aD0! where a D0 ! = = = The sensor address. The send data command. Terminates the command.
USER'S GUIDE____________________________________________________________________ When the previous command WS aV! is given, the response is the following: a where a = = = = = = The sensor address. The number of times the watchdog has triggered. Ideally should be zero. Format: +(c)c Wind speed unit. The options are: +0 = mph +1 = kt +2 = km/h +3 = m/s Current submode setting.
Chapter 4 ________________________________________________________________ Operation The response is the following: a where a = = = = = = 1) The sensor address. Average wind speed over the past yyyy1 seconds in currently active units. Format: +(ss)s.s Average wind direction over the past yyy1 seconds in degrees.
USER'S GUIDE____________________________________________________________________ The response is the following: attn where a tt = = n = = The sensor address. The time in seconds the sensor needs until it has the verification data ready (01) The number of verification data fields that will be returned (4). Terminates the response. Vaisala-specific SDI-12 Commands Supported by WS425 Measurement Unit Change (aXUx!) This command sets the desired measurement unit for wind speed.
Chapter 4 ________________________________________________________________ Operation Heater Control Command (aXHx!) This command switches the sensor heating into active or disabled state. In the active state, heating is still thermostatically controlled. The command works only for heated sensor models. The command is the following: aXHx! where a XH x = = = ! = The sensor address. The heater control command. The options are: 0 = disable the heater 1 = enable the heater Terminates the command.
USER'S GUIDE____________________________________________________________________ The response is the following: a+x where a x = = = The sensor address. The currently active submode. The options are: 0 = submode A 1 = submode B Terminates the response. Place Sensor in Submode B (aXQx;c.c;n;yyyy!) This command sets the sensor into submode B which enables calculation of averaged wind data and gust wind speed and direction. The command is the following: aXQx;c.
Chapter 4 ________________________________________________________________ Operation Reset the Sensor to Submode A Command (aXS!) When the sensor is set to submode B in order to compute averaged wind data, the sensor will stay in mode B until a 2-hour time period has elapsed. This computation period can be aborted earlier by issuing the command (XS!). The command is the following: aXS! where a XS ! = = = The sensor address. The reset sensor to submode A command. Terminates the command.
USER'S GUIDE____________________________________________________________________ The response is the following: a+x where a x = = = The sensor address. Currently active wind speed unit. The options are: 0 = mph 1 = kt 2 = km/h 3 = m/s Terminates the response. SDI-12 TIMING The Figure 12 on page 67 shows a timing diagram for an SDI-12 command and its response. The tolerance for all SDI-12 timing is ±0.40 milliseconds.
Chapter 4 ________________________________________________________________ Operation DATA break (at least 12 milliseconds) SDI-12 Data Line SENSOR command response marking (at least 8.33 milliseconds) marking (at least 8.33 milliseconds) sensor must respond within 15 Figure 12 maximum time 380 ms most commands 780ms D0,R0 commands Timing Diagram - After receiving the break and the command, the addressed sensor sets the data line to marking at 8.33 milliseconds and then send the response.
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Chapter 5 ______________________________________________________________ Maintenance CHAPTER 5 MAINTENANCE This chapter provides you with general maintenance information. Visual Inspection of WS425 Ultrasonic Wind Sensor WS425 Ultrasonic Wind Sensor is a very reliable and rugged sensor. It has been wind tunnel tested to over 175 knots for mechanical integrity. However, the transducers are constructed of ceramic material and can be damaged by dropping or hitting the transducers.
USER'S GUIDE____________________________________________________________________ 3. 4. 5. Do not strike or bend the transducers. Striking or bending the transducers will destroy the array of the ultrasonic wind sensor. All the transducers should be parallel to each other. For the correct alignment, see Figure 13 below. The verifier should slide over the transducers without excessive force. This validates that the mechanical spacing of the transducers is within specifications.
Chapter 5 ______________________________________________________________ Maintenance Periodic Testing Section Measuring Principle on page 15 explains that the sensor measures how long it takes for an ultrasonic signal to travel from transmitter to receiver. Therefore, the accuracy of the sensor depends on the accuracy of two factors: - The distance between the ultrasonic transmitter and receiver. This requires a measurement of the transducer arm trueness.
USER'S GUIDE____________________________________________________________________ 0003-016 Figure 14 Verifier 72 __________________________________________________________________ M210361EN-E
Chapter 6 ___________________________________________________________ Troubleshooting CHAPTER 6 TROUBLESHOOTING This chapter provides you information on common problems. Common Problems Frequently Asked Questions (FAQ) Q = Question A= Answer Q: I am looking for mounting options/products for the WS425 Ultrasonic Wind Sensor. Preferably, a tripod mount.
USER'S GUIDE____________________________________________________________________ frequency range spanned from 10 kHz to 10 GHz. The tested sensors were only disturbed by frequencies occurring at the band from 95kHz to 107kHz, which is the range that the sensor uses for the ultrasonic measurement. Radio communication devices do not operate at this band.
Chapter 6 ___________________________________________________________ Troubleshooting Instructions for Opening a Serial Terminal Connection to WS425 1. Connect an RS-232 cable between your terminal computer, power supply and your sensor. If you are using a Vaisala RS-232 cable with code ZZ45203, the cable colors are the following: Connections to power supply: Black (WS425 pin 1) Brown (WS425 pin 11) - Ground +12 VDC Connections to terminal PC: Red (WS425 pin 9) 2. 3. 4. 5.
USER'S GUIDE____________________________________________________________________ Technical Support For technical questions, contact the Vaisala technical support: E-mail Phone (int.) Fax helpdesk@vaisala.com +358 9 8949 2789 +358 9 8949 2790 Return Instructions If the product needs repair, please follow the instructions below to speed up the process and avoid extra costs. 1. 2. 3. 4. 5. 6. Read the warranty information.
Chapter 6 ___________________________________________________________ Troubleshooting Vaisala Service Centers VAISALA _______________________________________________________________________ 77
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Chapter 7 ____________________________________________________________ Technical Data CHAPTER 7 TECHNICAL DATA This chapter gives the technical data on the product. Specifications Table 16 Technical Specifications Wind Speed Measurement range serial output analog output Starting threshold Delay distance Resolution Accuracy (range 0 ...
USER'S GUIDE____________________________________________________________________ Wind Speed Response Characteristics Maximum reading rate Sonic measurement time Signal processing time Response time General Operating power supply Heating power supply (for heated model) Operating temperature WS425 non-heated WS425 heated Material body sensor arms transducer heads Dimensions 1 per second 0.2 s 0.15 s 0.35 s 10 ...15 VDC, 29 mA RMS 36 VDC ±10 %, 0.7 A -40 ... +55 °C (-40 ... +131 °F) -55 ... +55 °C (-67 ...
Appendix A ________________________________________________________________Drawings APPENDIX A DRAWINGS 0212-043 Figure 15 WS425FIX30 Adapter VAISALA _______________________________________________________________________ 81
USER'S GUIDE____________________________________________________________________ 0301-012 Figure 16 WS425FIX60 Adapter 82 __________________________________________________________________ M210361EN-E
Appendix A ________________________________________________________________Drawings 0301-013 Figure 17 WS425FIX60 Adapter The following numbers refer to Figure 17 above.
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Appendix A ________________________________________________________________Drawings VAISALA _______________________________________________________________________ 85
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