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Vaisala FD12P User Manual

Vaisala FD12P
154 pages
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Weather Sensor
FD12P
USER'S GUIDE
M210296en-A
May 2002

Table of Contents

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Vaisala FD12P Specifications

General IconGeneral
BrandVaisala
ModelFD12P
CategoryAccessories
LanguageEnglish

Summary

General Information

Manual Overview

Provides an overview of the manual's content and purpose.

Safety Precautions

Details critical safety precautions for operating and installing the FD12P Weather Sensor.

Product Overview

FD12P Introduction

Introduces the FD12P Weather Sensor's capabilities and applications.

Hardware Structure

Describes the physical components and assembly of the FD12P Weather Sensor.

Technical Specifications

Lists detailed mechanical, electrical, and optical specifications of the FD12P.

Installation Guide

Installation Planning

Provides steps for planning and executing the FD12P installation effectively.

Site Selection and Orientation

Guides on choosing the optimal site for accurate weather measurements, avoiding obstructions.

Grounding and Lightning Protection

Explains essential grounding procedures for safety and equipment protection against electrical hazards.

Cable Selection and Connection

Details recommended cabling types and connection principles for power and communication.

Installation Steps

Outlines the step-by-step physical process for installing the FD12P sensor unit and its components.

Operation and Commands

Operation Modes

Overview of the FD12P's automatic and polled operation modes and user commands.

Command Mode Access

Explains how to access and exit the FD12P's operator command interface.

Data Messages and Sending

Describes FD12P output message formats and automatic/polled sending configurations.

FD12P Command Reference

Lists available commands for operating and configuring the FD12P sensor.

System Configuration Commands

Details commands for displaying and modifying system parameters and configuration settings.

Maintenance Commands

Lists commands for performing routine maintenance tasks like calibration and status checks.

Functional Description

Sensor Functionality

Explains the basic principles of visibility and precipitation measurement by the FD12P.

Optical Measurement

Details the forward scatter measurement technique used for visibility and precipitation detection.

Weather Algorithm Description

Explains how the FD12P processes data to determine visibility, precipitation type, and intensity.

Maintenance Procedures

General Maintenance

Outlines the recommended periodic maintenance for the FD12P Weather Sensor.

Cleaning Components

Provides detailed instructions for cleaning optical components and the rain detector.

Calibration Procedures

Details the steps for calibrating visibility and temperature sensors using specialized kits.

Troubleshooting Guide

Warnings and Alarms

Explains how to interpret and respond to system warnings and error messages.

Message Troubleshooting

Provides solutions for common problems like missing messages or incorrect settings.

Visibility Value Troubleshooting

Guides on identifying and resolving issues related to missing or inaccurate visibility readings.

Appendices

NWS Weather Codes

Lists National Weather Service (NWS) and World Meteorological Organization (WMO) codes used by the FD12P.

WMO SYNOP Codes

Provides World Meteorological Organization (WMO) SYNOP codes for reporting weather conditions.

Jumper Settings and Wiring

CPU Board Configuration

Details jumper settings and connector pinouts for the FD12P CPU board and related components.

Interface Board and Regulator Details

Describes jumpers and connectors for the DRI21 Interface Board and DC-Regulator.

Test Points

Transmitter Test Points

Lists specific test points on the transmitter circuit board for diagnostics and testing.

Receiver Test Points

Identifies test points on the receiver circuit board for troubleshooting and verification.

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