Document Outline

• GENERAL INFORMATION
  • About This Manual
    • Contents of This Manual
    • Version Information
    • Feedback
  • Safety
    • General Safety Considerations
    • Product Related Safety Precautions
      • Inverted Mounting
      • Absolute Maximum Voltages
    • ESD Protection
  • Regulatory Compliances
    • EN55011 Class A Group 1 & EN50082-2
    • MIL-STD-426 Method RS03
    • MIL-STD 810 Method 509
    • MIL-STD 202 Method 213
    • MIL-STD-167-1 (SHIPS)
    • Third-Party Testing (Field Tests Included)
      • NWS ASOS Mechanical Wind Sensor Replacement
      • Lawrence Livermore Labs
      • Tennessee Valley Authority
      • CETIAT (Centre Technique des Industries Aéraulique et Thermiques)
  • Trademarks
  • License Agreement
  • Warranty
• PRODUCT OVERVIEW
  • Introduction to WS425
    • Measuring Principle
    • Sensor Operating Modes
  • Sensor Features
    • Polar Wind Speed and Direction
    • Wind Speed X and Y Components
    • Scalar Averaging of Wind Speed and Direction
    • Vector Averaging of Wind Speed and Direction
    • Wind Direction Coasting
    • Gust Wind Speed and Direction Over Time
• INSTALLATION
  • Selecting Location
  • Installation Procedure
    • Unpacking Instructions
    • Factory Settings
      • RS-232 Default Settings for USA
      • Default Settings of RS-232, RS-422, and RS-485 for Europe
    • Mounting
      • Mounting Procedure on a 1-inch IPS Vertical Pipe
      • Inverted Mounting
    • Alignment
      • Magnetic Declination Correction
      • Compass Alignment with a Mast Adapter
  • Connections
  • Powering
    • Power Supplies
• OPERATION
  • Analog Mode
    • Wind Speed
    • Wind Direction
    • Missing Readings
  • Serial Mode
    • Overview
      • Serial Mode Default Settings for the USA
      • Serial Mode Default Settings for Europe
    • Configuration Menu
    • Configuration Commands
      • Handar RS-232
      • Identify Command I
      • Measurement Command Wx
        • Missing Readings
      • Measurement Unit Change Command Ux
      • NMEA Standard
        • Missing Readings
      • NMEA Extended Message
      • WAT11 Message
        • Missing Readings
    • Wind Speed Units
    • Average Interval
      • Averaging Method
        • Scalar Averaging
        • Vector Averaging
    • Output Interval
    • Sensor ID Character
    • Wind Direction Coast Threshold
    • Head Orientation
    • Bit Rate
    • Parity
    • Data Bits
    • Save Configuration
    • Zero Speed Calibration
    • Resume Operation
  • SDI-12 Protocol
    • SDI-12 Support Group
    • SDI-12 Electrical Interface
    • Serial Data Line
    • Voltage Transitions
    • Impedance
    • SDI-12 Communications Protocol
    • Baud Rate and Byte Frame Format
    • Two Different Submodes
    • Standard SDI-12 Commands Supported by WS425
      • Acknowledge Active Command (a!)
      • Send Identification Command (aI!)
      • Address Query Command (?!)
      • Change Address Command (aAb!)
      • Start Measurement Command (aM!)
      • Send Data Command (aD0!)
      • Continuous Measurements (aR0!)
      • Start Verification (aV!)
    • Vaisala-specific SDI-12 Commands Supported by WS425
      • Measurement Unit Change (aXUx!)
      • Heater Control Command (aXHx!)
      • Check Current Submode (aX?!)
      • Place Sensor in Submode B (aXQx;c.c;n;yyyy!)
      • Reset the Sensor to Submode A Command (aXS!)
      • Check Current Measurement Unit (aX*!)
    • SDI-12 TIMING
• MAINTENANCE
  • Visual Inspection of WS425 Ultrasonic Wind Sensor
  • Periodic Testing
• TROUBLESHOOTING
  • Common Problems
    • Frequently Asked Questions (FAQ)
    • Instructions for Opening a Serial Terminal Connection to WS425
  • Technical Support
  • Return Instructions
  • Vaisala Service Centers
• TECHNICAL DATA
  • Specifications
• DRAWINGS