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General| Brand | Vaisala |
|---|---|
| Model | LT31 |
| Category | Measuring Instruments |
| Language | English |
Provides information for installing, operating, and maintaining the Vaisala Transmissometer LT31.
Details manual revisions, including version codes and descriptions of updates.
Lists other relevant Vaisala user guides and installation documents.
Instructions on how to provide comments and suggestions for manual improvement.
Highlights important safety considerations and warning symbols used throughout the manual.
Specific safety precautions related to the LT31 Transmissometer's design and use.
Guidelines for handling electronic components to prevent electrostatic discharge damage.
Instructions for separating and recycling LT31 system waste materials responsibly.
Information on product standards, patents, trademarks, and warranty details.
Introduces the LT31 transmissometer, its power requirements, and communication capabilities.
Details features like auto-calibration, auto-alignment, and contamination control.
Details the double-tube mast construction and frangible mounting bolts.
Components of the measurement and interface units, including enclosures, optics, and terminals.
Provides a table of LT31 component codes, names, and descriptions.
Explains the LT31's operation, visibility, and Meteorological Optical Range (MOR).
Details how LT31 measures visibility and performs automatic calibration.
Explains automatic alignment mechanisms and quality monitoring.
Methods for preventing and measuring window contamination.
Overview of LT31 system units: Measurement, Optics, Interface, CPU, and Sensors.
Details on optional sensors and modules like LM21, TERMBOX, and Battery Backup.
Planning installation, site survey, and location selection based on ICAO standards.
Guidelines for unpacking, checking, and storing LT31 components.
Critical procedures for proper grounding, lightning protection, and cable selection.
Available communication interfaces (RS-232, RS-485, Modem) and their configurations.
Step-by-step installation guide, including foundation preparation and mounting.
Procedures for on-site installation of receiver and transmitter units.
Installation steps for the Background Luminance Sensor LM21.
Steps for finalizing receiver/transmitter assembly, including covers and startup.
Connecting to maintenance interface, setting terminal, and entering command mode.
Overview of LT31 commands, entering/exiting command mode, and using OPEN/CLOSE.
Information on accessing commands via HELP and system command completion.
Operating the LT31 system through menus for configuration and status checks.
Viewing system status and performing alignment procedures.
Procedures for calibrating the LT31 and performing linearity tests.
Accessing PWD sensor commands and service menu for unit maintenance.
Details on LT31 message formats, sending modes, and status code decoding.
Configuring system parameters, default settings, and using RVR system test commands.
Recommended maintenance schedule, cleaning windows, hoods, and sensors.
Checking blower operation, replacing particle filters, and checking heated hoods.
Procedures for replacing fuses, power supply, CPU, modem, measurement units, optics, and modules.
General information and steps for performing raw, fine, and automated alignment.
Performing offset, visibility, and command-line calibrations.
Using CLEAN, ZERO, CAL, and CHEC commands for PWD sensor calibration.
Evaluating LT31 performance using optical filters and analyzing test results.
Decoding system status words and understanding event messages for troubleshooting.
Troubleshooting common issues like dialogue errors, missing data, and LED indicators.
Contacting Vaisala technical support and procedures for returning products for repair.
Table detailing operational specifications like baseline, MOR range, resolution, and output data.
Table outlining transmitter and receiver optical specifications.
Table detailing AC supply, power consumption, and output specifications.
Table providing dimensions, weight, mounting, material, and frangibility data.
Table listing operating temperature, humidity, and wind speed limits.
Information on LT31's CE compliance and verification according to relevant directives.
Instructions for installing LT31 on extension poles for increased height.
Specific installation instructions for LTEP100/200 extension poles.
Instructions for drilling holes for extension pole mounting.
Instructions for setting up receiver/transmitter masts on extension poles.
Mounting the LT31 unit to the extension pole and aligning it vertically.
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