Manuals

LI-840 CO2/H2O Gas Analyzer Instruction Manual

Instruction manual for the LI-840 CO2/H2O Gas Analyzer.

Instructions for using the CalAdjust application

Instructions for using the CalAdjust application in older LI-820s, LI-840s, and LI-8100s. Not for new LI-820s, LI-840As, or LI-8100As.

Software

LI-840 CO2/H2O Analyzer Instrument (Embedded) Software v1.0.15

Instrument (embedded) software v1.0.15 for the LI-840 CO2/H2O Analyzer.

LI-840 CO2/H2O Analyzer Windows Interface Software v1.0.2

Windows interface software v1.0.2 for the LI-840 CO2/H2O Analyzer.

Factory Service and Recalibration

Factory calibration is an integral step in the manufacture and repair of all LI-COR measuring instruments.

About LI-840/A Factory Calibration

To request factory service or recalibration for a LI-COR instrument, request factory service or contact your local distributor. Service will be performed at our US office in Lincoln, NE USA, European office (LI-COR GmbH), or by your local distributor.

Frequently Asked Questions

We have examined many different USB adapters and found the type that we sell to work best with all of our instruments. Other adapters may work, but they may not.

We can only guarantee the FTDI adapter that we sell. It is included with many of the LI-COR instruments that require serial communication with a computer. We have found that some third-party USB adapters (Prolific, for example) do not accurately transmit all the data from the instrument to the computer, or vice versa. You should use an adapter with an FTDI chipset, and Belkin and Keyspan adapters typically work well with our instruments too.

All Documents

Summary
Measuring pCO2 and Dissolved Inorganic Carbonates in Water Application note that describes how to use LI-COR analyzers in systems that measure the partial pressure of CO2 (pCO2) and dissolved organic carbonates in water. application note
Communicating with LI-COR instruments using LabVIEW Basic instructions that describe how to communicate with LI-COR instruments using LabVIEW. Includes sample programs to read data. application note
LI-820/LI-840 Gas Analyzers: installation instructions for embedded software Instructions for updating the embedded (instrument) software in the LI-820 CO2 or LI-840 CO2/H2O Analyzers. install guide
LI-840 Source/Detector Replacement Instructions Replacement instructions for the source and detector of the LI-840 CO2/H2O Gas Analyzer. install guide
Source, Detector, and Optical Path Replacement Instructions Instructions for replacing the source, detector, and optical path in the LI-800, LI-820, LI-840, and LI-8100A gas analyzers. install guide
Using the Sable Systems DG-4 to set the H2O span for LI-COR gas analyzers You can adjust the H2O span in many LI-COR gas analyzers with a dewpoint generated by the Sable Systems DG-4 Dewpoint Generator. This tech tip provides some details. tech tip
Frequently Asked Questions About Replacing LI-840 Source and Detector Frequently Asked Questions about replacing LI-840 source and detector. tech tip
Temporary Fix for a Bad Source Tech Tip describing a temporary fix for a bad optical source. tech tip