User manual VAISALA WS425 F

[. . . ] USER'S GUIDE Vaisala Ultrasonic Wind Sensor WS425 F/G M210713EN-C PUBLISHED BY Vaisala Oyj P. O. Box 26 FIN-00421 Helsinki Finland Visit our Internet pages at http://www. vaisala. com/ © Vaisala 2006 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. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. [. . . ] Issue the WS command to determine if any self tests have detected a sensor failure after removing the verifier and then waiting for 30 seconds. If the tests fail, the sensor must be repaired. WH Command This command displays the sensor command Help menu. The command format is: WH CR LF The WH command provides a list of all commands available for the sensor, with a brief description of syntax, arguments (if any), and description. This message is intended for display to a terminal connected to the RS-232 sensor port. Command/Response Summary CR LF CR LF WA Return average wind speed and direction CR LF Response format: CR LF Byte 1: Byte: 2 Byte: 3 Byte: 4 STX CR LF Sensor ID = W CR LF Command identifier CR LF Sensor Status: P = PASS, F = Failed, H = Bad heater CR LF 52 ______________________________________________________________________________ Chapter 4 ________________________________________________________________ Operation Byte 5-7: Bytes 8-10: Bytes 11-12: Bytes 13-14: Bytes 15-19: Bytes 20-24: Byte 25: Byte 26-27: Bytes 28-29: Byte 30: Byte 31: Byte 32 WL WM WN WS WJ Average wind direction (degrees) CR LF Wind direction at peak wind speed (degrees) CR LF Averaging time for wind speed and direction CR LF Averaging time for peak wind speed and direction CR LF Average wind speed CR LF Peak wind speed CR LF Wind speed units (K = knots) CR LF Signal quality CR LF Hex checksum CR LF ETX CR LF Carriage return CR LF Line feed CR LF Enable automatic heater control CR LF Lock heaters on CR LF Lock heaters off CR LF Description of BIT status CR LF Set averaging times for wind speed/direction and peak wind speed/direction CR LF Enter password when prompted, then selections to the following prompts CR LF Wind speed/direction averaging time = ?CR LF Peak wind speed and direction averaging time = ?CR LF WD WF WR WCAL WH Perform and report extended diagnostic tests CR LF Return fixed data in WA command format CR LF Reset sensor CR LF Perform Sensor Self Calibration CR LF Display this help menu CR LF VAISALA _______________________________________________________________________ 53 User's Guide ______________________________________________________________________ WT Command This command requests the short response BIT results and status. The command format is: WT CR LF This command is an abbreviated version of the verbose BIT results and status command. Field descriptors are omitted and only pass/fail status and measured value are reported. The command response is packed in the standard STX ­ body ­ CSUM ­ ETX format. Byte 1: Byte 2: Byte 3: Byte 4: Byte 5-8: Byte 9: Byte 10-12: Byte 13: Byte 14-16: Byte 17: Bytes 18-20: Byte 21: Byte 22-25: Byte 26: Bytes 26-29: Byte 30: Bytes 31-34: Byte 35: Bytes 36-40: Byte 41: Bytes 42-43: Byte 44: STX start of text ASCII control character W sensor ID T command identifier P or F for heater voltage pass or fail XX. X format heater voltage (volts RMS) P or F for array heater resistance pass or fail X. X or XX. (format as required) for array heater resistance (ohms) P or F for pass or fail on heater off voltage X. X format heater off voltage (volts RMS) P or F for pass or fail thermistor temperature Thermistor temperature (degrees Celsius) P or F for incoming supply voltage pass or fail XX. X format incoming supply voltage (volts DC) P or F for 5 volt supply pass or fail X. XX format 5 volt supply voltage (volts DC) P or F for 10 volt supply pass or fail XX. X format 10 volt supply voltage (volts DC) ASCII hyphen character (-) XXXXX format bad 1 second reading counter P or F for path 0 Signal Quality Index pass or fail XX format path 0 Signal Quality Index P or F for path 1 Signal Quality Index pass or fail 54 ______________________________________________________________________________ Chapter 4 ________________________________________________________________ Operation Bytes 45-46: Byte 47: Bytes 48-49: Byte 50: Bytes 51-52: Byte 53: Bytes 54-55: Byte 56: Bytes 57-58: Bytes 59-60: XX format path 1 Signal Quality Index P or F for path 2 Signal Quality Index pass or fail XX format path 2 Signal Quality Index P or F for path 3 Signal Quality Index pass or fail XX format path 3 Signal Quality Index P or F for path 4 Signal Quality Index pass or fail XX format path 4 Signal Quality Index P or F for path 5 Signal Quality Index pass or fail XX format path 5 Signal Quality Index XX hexadecimal ASCII for modulo 256 checksum for Character positions 2 through 58 ETX end of text ASCII control character ASCII carriage return control character ASCII line feed control character Byte 61: Byte 62: Byte 63: The array heater resistance value will be missing (99. ) if either the heater on voltage is below 10 V RMS or the array heater on current is below 1 A RMS. WSST Command This command returns the static speed of sound and sonic temperature. The command format is: WSST CR LF The command responds with a return string containing the measured static speed of sound in knots with a tenth of a knot resolution, followed by an ASCII TAB control character, then the corresponding sonic temperature in degrees Fahrenheit with a tenth of a degree resolution. The return string is terminated with an ASCII carriage return and then line feed character. The sonic temperature is not compensated for the effects of humidity on the static speed of sound. The static speed of sound output is a ten second running average of individual static speed of sound measurements calculated each second. The sensor calculates a new sonic temperature from this running average of static speed of sound each second. The sensor VAISALA _______________________________________________________________________ 55 User's Guide ______________________________________________________________________ response can be calibrated to a known ambient temperature with the WSTK command below. The output is of a fixed character length with 5 characters for the static speed of sound and 6 characters for the sonic temperature. Positive temperatures at or under 99. 9° F will be padded with a leading zero. This leading zero will be replaced by a minus sign for negative temperatures. An example of the response: 670. 5 023. 0 If the sensor is unable to compute the values due to a problem with the sensor, the missing data response will be the following: 999. 9 099. 9 WSTK Command This command is used to calibrate the static speed of sound and sonic temperature. [. . . ] 7. If NO, then continue from step 5. Issue the STOP TEST Continuous Data button. Select a new Diagnostics Program baud rate by using 4800 and Change Commport Baudrate buttons. Issue the START TEST Continuous Data button and verify that the sensor responds with wind data. If NO, then replace the sensor according to the instructions in section Wind Sensor Removal and Installation on page 74. 8. [. . . ]