1

Introduction to the LI-8250

LI-8250 Multiplexer

Chamber options

Gas analyzer options

8250-01 Extension Manifold

8250-02 Calibration Manifold

SoilFluxPro™ Software

Configuration examples

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

Field deployment tutorial

Installing soil collars

Installing long-term chambers

Using sensors at chambers

Protection from the elements

4

Using the 8250-02 Calibration Manifold

What actually happens

Zero gas standards

Installation and assembly

Configuring the automatic baseline adjustment

Example configurations

Span adjustment with manual controls

5

Measuring gas fluxes in a flask system

Flask design considerations

Hardware requirements

Connecting tubes and thermistors to flasks

Installing the flask sampling kit

Calibrating the purge pump

Configuring flask measurements

Finding leaks

6

Using custom chambers

Design considerations

Connecting tubes

Power considerations

Serial interface

Custom chamber control kit

Messaging

Configuring a custom chamber

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

Chamber problems (8200-104/C)

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

Header

Home page

Configuration workspace tour

Files

Diagnostics

Tools menu

Settings

A

Soil gas flux measurement theory

B

Connecting to a cellular modem

C

Configuring a remote server

D

Using analyzers from other manufacturers

E

Specifications