1

General Description

What's What

Features

Precautions

Getting Started Tutorial

2

Power On

Alarms

3

Operation

Installing the PC Communication Software on Your Computer

Setting the Communication Parameters

Cabling

Initial Setup

Software Reference

User Calibration - Setting the Zero and Span

Connecting the LI-840A to the LI‑1400 Datalogger

4

Theory of Operation

System Overview

Optical Bench System

5

Maintenance

Cleaning the Optical Bench

Changing the Fuse

Note on Infrared Source Replacement

Storing the LI-840A

6

Specifications

7

Equation Summary

Additional details regarding the configuration grammar are in the instruction manual.