Document Outline

• GENERAL INFORMATION
  • About This Manual
    • Contents of This Manual
  • Version Information
  • Related Manuals
  • Safety
    • General Safety Considerations
    • Product Related Safety Precautions
      • Safety Summary
      • Ground the Equipment
      • Radio Frequency Interference Statement (USA)
    • ESD Protection
  • Trademarks
  • Warranty
• PRODUCT OVERVIEW
  • Introduction
    • Hardware Structure
      • Sensing Elements
      • Electronics Enclosure
      • Structural Elements
    • Operating Principle
    • Using FD12P
  • Equipment Nomenclature
  • Specifications
    • Mechanical Specifications
    • Electrical Specifications
    • Optical Specifications
  • Capabilities and Limitations
    • Visibility Measurement Specifications
    • Weather Sensing Specifications
    • Environmental Specifications
• INSTALLATION
  • Organizing Installation
  • Location and Orientation
  • Grounding and Lightning Protection
    • Equipment Grounding
    • Internal Grounding
    • Grounding for Testing Purposes
    • Grounding Remote Units and Communication Cable
  • Cable Selection
    • Line Power Cabling
    • Communication Cable
  • Unloading and Unpacking
    • Unpacking Procedure
    • Storage Information
  • Installation Procedures
    • Constructing the Foundation
      • Mounting When Casting the Pad
      • Mounting to an Existing Surface
    • Assembling the FD12P
    • Attaching the DTS14B Temperature Sensor to the Mast
    • Connecting Cables
      • Basic Wiring
      • Communication Cable EMC-shielding
      • Connecting a Background Luminance Sensor or a Day/Night Switch to FD12P
    • Communication Options
      • Serial Communications Settings
      • Serial Transmission RS-232
      • Serial Multipoint Transmission RS-485
      • Modem DMX21
      • Indicators and Manual Controls
      • Analog Transmission
      • Connecting the Maintenance Terminal
    • Startup Testing
    • Initial Settings
• OPERATION
  • Introduction
  • User Commands in Normal Operation
  • Markings Used in This Manual
  • Entering/Exiting the Command Mode
    • OPEN Command
    • CLOSE Command
  • Automatic Message Sending
    • Message Types
      • Message 0
      • Message 1
      • Message 2
      • Message 3
      • Message 4
      • Messages 5 and 6
      • Message 7
  • Message Polling
  • FD12P Command Set
    • HELP Command
    • MES Command
      • AMES Command
    • Weather Related Commands
      • WPAR Command
      • WSET Command
      • PRW Command
      • CLRS Command
      • WHIS Command
    • System Configuration Commands
      • PAR Command
      • CONF Command
      • BAUD Command
      • BLSC Command
    • Maintenance Commands
      • STA Command
      • CAL Command
      • TCAL Command
      • CLEAN Command
      • CHEC Command
      • FREQ Command
      • DRY and WET Commands
      • AN Command
    • Analog Output Commands
      • Analog Output Calibration
      • Data Scaling
      • Hardware Check
    • Other Commands
      • TIME Command
      • DATE Command
      • RESET Command
• FUNCTIONAL DESCRIPTION
  • General
  • Optical Measurement
    • Optical Arrangement
    • FDT12B Transmitter Unit
    • FDR12 Receiver Unit
  • Additional Measurements
    • General
    • DRI21 Interface Board
    • DRD12 Rain Detector
    • DTS14B Temperature Sensor
  • FDP12 Control Unit
  • Measurement Signal Processing
    • Optical Signal Processing
    • DRD12 Signal Processing
  • Algorithm Description
    • Visibility
    • Detecting Precipitation
    • Precipitation Intensity
    • Precipitation Accumulation
    • Present Weather
      • Precipitation Types
      • Visibility Types
      • Weather Classes
      • Weather Code Selection
  • Applications
  • Internal Monitoring
    • Built-in Tests
    • Memory Tests
    • Signal Monitoring
    • Hardware Monitoring
    • Contamination Monitoring
• MAINTENANCE
  • General
  • Cleaning
    • Cleaning Lenses and Hoods
    • Cleaning DRD12 Rain Detector
  • Calibration
    • General
    • Visibility Calibration
      • Calibration Check Procedure
      • Calibration Procedure
      • Calibrating the DTS14B Temperature Sensor
    • Removing and Replacing
      • Removing and Replacing Optical Units
      • Removing and Replacing the DRD12 Rain Detector
      • Calibrating FD12P Weather Sensor after Unit Replacement
• TROUBLESHOOTING
  • Warnings
  • Troubleshooting Examples
    • Message Indicating Warning or Alarm
    • Message Missing
    • Visibility Value is Missing
    • Visibility Value is Continuously Too Good
    • Visibility is Constantly Too Low
    • FDP12 Reports Precipitation When There Is None
    • FD12P Reports Frozen Precipitation during Rain
    • Have Jumper Settings Been Changed?
  • Values for Internal Monitoring
  • Getting Help
  • Return Instructions
• NWS AND WMO CODES USED IN FD12P
  • The NWS Codes
• JUMPER SETTINGS AND INTERNAL WIRING
  • CPU Board
  • DC-Regulator
  • DRI21 Interface Board
• TRANSMITTER AND RECEIVER TEST POINTS
• INDEX