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Month: November 2012

How to Interpret the Diagnostic Values from the LI-7500A and LI-7200 CO2/H2O Gas Analyzers

How to Interpret the Diagnostic Values from the LI-7500A and LI-7200 CO2/H2O Gas Analyzers

The diagnostic values output by the LI-7500A and LI-7200 CO2/H2O gas analyzers indicate whether or not your instruments are working normally, and what might have gone wrong in case of  a malfunction. Here are the two steps for interpreting the diagnostic values:

1.  Convert the diagnostic values from decimal to binary format

The LI-7500A and LI-7200 diagnostic values are labeled as “Diagnostic Value” in their outputs.  You can use the method of division by two to manually convert them from…

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Poster tack, Plants, and You

Poster tack, Plants, and You

The complex shape and size of a leaf can create challenges for sealing the LI-6400XT chambers.  A proper seal for the chamber is required to prevent leaks and erroneous results, but many leaves are highly dissected, have thick midribs, have large petioles, or any combination of the three.    LI-COR manufactures a thick gasket kit (6400-37) for our standard 6 cm2 chamber and the 2 cm2 Leaf Chamber Fluorometer, which can help seal the chamber against leaks, but if the…

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