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LI-COR LI-870 User Manual

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Using the LI-870
CO
2
/H
2
O Analyzer
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LI-COR LI-870 Specifications

General IconGeneral
Measurement PrincipleNon-Dispersive Infrared (NDIR) Absorption
Operating Temperature Range0 to 50 °C
Data LoggingYes
Response Time≤ 1 second
Data StorageInternal memory
CommunicationUSB, RS-232
OutputsAnalog, Digital
DisplayLCD
Power Supply12 VDC
CO₂ Measurement Range0 to 3000 ppm

Summary

Section 1. Overview of the LI-870

What's Included in the LI-870 Package

Details on checking the packing list for the LI-870.

LI-870 Analyzer Description

Overview of the portable gas analyzer for soil CO2 flux.

LI-870 Cable and Tubing Assembly

Description of the cable and tubing assembly for connecting the LI-870.

LI-870 Shoulder Strap

Information about the shoulder strap for carrying the LI-870.

LI-870 Split Ring Assembly

Details on the split ring and standoff for strap attachment.

LI-870 Spares Kit Contents

List of items included in the LI-870 spares kit.

LI-870 Calibration Software

Information on software for calibrating the LI-870 and viewing data.

Section 2. Using the LI-870

Connecting the LI-870 Cable Assembly

Steps for connecting the USB data, tubing, and power cables.

Powering the LI-870 and Making Measurements

How to power on the analyzer and warm-up procedures for measurements.

Proper Storage of the LI-870

Guidelines for post-measurement flushing and storage conditions.

Section 3. Troubleshooting

Troubleshooting Software Recognition Issues

Steps to resolve issues where the software doesn't recognize the LI-870.

Troubleshooting Zero and Span Calibration

Addresses problems with instrument zeroing and spanning, often due to optics.

Troubleshooting Erratic CO2 Readings

Solutions for incorrect CO2 readings or unstable measurements.

Section 4. Maintenance

Cleaning the LI-870 Optical Bench

Detailed steps for removing, cleaning, and reassembling the optical bench.

Connecting LI-870 for Calibration

How to connect the LI-870 to software for calibration procedures.

Performing User Calibration

Instructions for setting zero and span for accurate measurements.

Appendix A. Specifications

Appendix B. Equations summary

Appendix C. Warranty

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