Operating Instructions

Table of Contents

1 Introduction to the LI-8250

LI-8250 Multiplexer

Chamber options

Gas analyzer options

8250-01 Extension Manifold

8250-02 Calibration Manifold

SoilFluxPro™ Software

2 Getting started

Initial setup tutorial

Enabling and disabling Wi-Fi

Attaching gas analyzers

Attaching chambers and extensions manifolds

Powering the LI-8250 Multiplexer

Using the SDI-12 console

3 Field deployment

Tips for success

Long-term Soil Chambers

Automated Canopy Chambers

Using sensors with chambers

4 Using the 8250-02 Calibration Manifold
5 Measuring gas fluxes in a flask system
6 Using custom chambers
7 Working with data files

Downloading files

Flux results

Data dictionary - measured variables

Metadata dictionary

8 Troubleshooting

System will not power on or powers on incompletely

Connection and communication problems

Soil chambers and canopy chambers

Data and measurement problems

Performing the leak tests

9 Maintenance

LI-8250 Multiplexer and 8250-01 Extension Manifold maintenance

Long-term chamber maintenance

Updating the firmware

10 Tour of the interface

Home page

Configuration workspace tour

Multiplexer and component blocks

Sampling sequence blocks

Calibration Sequence blocks

Files

Diagnostics

Tools menu

Settings

A Soil gas flux measurement theory

Accounting for an altered diffusion gradient

Measurement time

The measurement cycle

Terminology

Deriving the flux equation

Measuring net carbon exchange (NCE) and net ecosystem exchange (NEE)

B Connecting to a cellular modem
C Configuring a remote server
D Using analyzers from other manufacturers
E Making collars for LI-COR soil chambers
F Specifications

Instruction Manuals

Using the LI-8250 Multiplexer in Soil Gas Exchange Measurements

(8250-Muiltipexer_Using-the-LI-8250_19441.pdf)

Instruction manual for the LI-8250 Multiplexer and Long-term Soil Gas Flux System.