LI-840A Software Charting Screenshot
Chart: Real-time strip charts can be printed or saved to a file.
LI-840A Software Main Window Screenshot
Main Window: The LI‑840A communications software main window displays CO2 and H2O concentration, and status of settings.
LI-840A Software Settings Screenshot
Settings: Operational parameters are easily changed in the settings window.

The LI‑840A is configured with a Windows® software application, which is provided with the instrument.

LI‑840A software features include:

  • Scalable, linear Digital to Analog Converters (DACs). You can scale the LI‑840A outputs for increased flexibility and resolution.
  • Wide calibration of 0-20,000 ppm CO2 and 0-60 ppt H2O.

The configuration software is used for configuration, control, data collection, and graphical data display. Your choice of parameters (CO2, H2O, cell pressure, or cell temperature) can be output via linear voltage or current outputs. In addition, 0-5V alarm outputs can be connected to audible alarms, relay switches, automatic dialers, pumps, or valves in industrial applications. The LI‑840A is connected to a computer with the RS-232 DB9 serial cable connection.

For complete integration of the LI‑840A into other equipment controls for OEM applications, the instrument also features a communication protocol based on the extensible Markup Language (XML). XML is a simple text-based language that allows you to communicate with the LI‑840A using simple text strings sent bi-directionally between your computer and the instrument over the RS‑232 port. Using XML, the LI‑840A can be polled for data at user-defined intervals, configured from remote locations, or set up to perform automatic calibration routines, for example.

Contact LI‑COR if you use an LI‑840 and would like to upgrade to an LI‑840A.

LI-840A Software Downloads

The LI-840A software consists of instrument (embedded) and Windows® Interface Software. To avoid a configuration error upon initial connection, update both embedded (instrument) and Windows interface software.

Download Software

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