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LI-COR LI-7700 User Manual

LI-COR LI-7700
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LI-7700
Open Path CH
4
Analyzer
Instruction Manual

Table of Contents

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LI-COR LI-7700 Specifications

General IconGeneral
BrandLI-COR
ModelLI-7700
CategoryMeasuring Instruments
LanguageEnglish

Summary

General Information

Overview of the LI-7700

Provides a high-level introduction to the LI-7700, its features, and design for atmospheric monitoring.

LI-7700 Components and Connections

Details the various components of the LI-7700 analyzer and their functions.

Basic Setup Procedures

Guides through the initial setup of the LI-7700, including software installation and power connection.

Mirror Cleaning and Care

Provides instructions on how to properly clean and maintain the mirrors of the LI-7700.

Operation

LI-7700 Interface Software

Introduces the main view, tool bar, and settings bar of the LI-7700 software interface.

Configuring the LI-7700

Details PC/Network data logging, status columns, and file splitting for configuration.

Operating Temperature and Mirror Controls

Explains operating temperature range, manual controls, and mirror heater/cleaner configurations.

Instrument Configuration and Analog Inputs

Covers instrument name, address, time settings, output rate, configuration files, and analog inputs.

Deploying the LI-7700 and Accessories

Provides guidance on mounting, vibrations, positioning, grounding, and attaching accessories.

Operation with the LI-7550 Analyzer Interface Unit

Introduction and Setup

Introduces the LI-7550 accessory and covers basic setup and connections.

Connecting Devices and Software Configuration

Details connecting LI-7700 to LI-7550 via Ethernet/RS-232 and software configuration.

LI-7550 Features and Data Logging

Explains USB data logging, analog inputs, and outputs for the LI-7550.

LI-7550 Clock and Outputs

Covers LI-7550 clock settings, SDM, RS-232, and Analog outputs configuration.

Mounting the LI-7550 Analyzer Interface Unit

Provides instructions for mounting the LI-7550 Analyzer Interface Unit.

Data Files

File Header and Data Structure

Describes the components of data files: file, diagnostics, and data headers.

Diagnostics and Status Columns

Explains diagnostic codes and status columns included in data files.

Making Flux Measurements

Flux Computation and WPL Corrections

Details how to compute methane fluxes and apply WPL corrections.

Theory and Equation Summary

Absorption of Infrared Radiation by a Gas

Explains the Beer-Lambert Law and its application to gas absorption.

Spectroscopy and Broadening Mechanisms

Covers temperature dependence of line strength and line broadening mechanisms.

Temperature, Pressure, and Water Vapor Compensations

Details compensating for temperature, pressure, and water vapor effects on measurements.

Derivation of Multipliers for Flux Measurements

Explains the derivation of multipliers for flux measurements, including WPL formulation.

Advanced Operation

Calibration Procedures

Guides through performing zero and span calibrations for the LI-7700.

Diagnostics and Laser Control

Covers diagnostics, laser temperature control, and manual line lock examples.

Networking and Finder Application

Details networking, enabling IPv6, and using the LI-7700 Finder Application.

Communications Grammar

Describes the protocol and XML grammar used for LI-7700 communication.

Appendices

Specifications

Lists the technical specifications for the LI-7700 and its accessories.

Maintenance Procedures

Covers maintenance tasks such as changing desiccant, fuses, and thermocouples.

Troubleshooting Common Issues

Provides solutions for common problems encountered with the LI-7700.

Supplier Information

Lists suppliers for chemicals, cables, and other necessary hardware.

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