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Year: 2017

How to Change Metadata in EddyPro Software

How to Change Metadata in EddyPro Software

Mistakes happen. During the busy hustle of an eddy covariance installation, you might accidentally enter some metadata values incorrectly in the LI-7500RS/LI-7500DS/LI-7200RS Windows Interface Software. For example, you could set the canopy height to 2.6m instead of 6.2m, or you could incorrectly hear the sensor separation numbers as they’re being shouted down from the tower. You might not notice the discrepancy for a while, either. Fortunately EddyPro® Software makes it easy to edit the metadata file and reprocess all of…

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Connecting a Soil Moisture Probe to the LI-6400XT

Connecting a Soil Moisture Probe to the LI-6400XT

The LI-6400XT Portable Photosynthesis System can record data from auxiliary sensors, such as soil moisture probes, through its 37-pin connector. Any soil moisture probe can be connected, as long as it provides analog voltage outputs. Frequency, SDI-12, or RS-485 sensors will not work with the LI-6400XT. In this example we will connect a Decagon EC-5 soil moisture sensor.

Hardware Configuration

Connect the soil moisture probe to the 37-pin connector kit (part number 9964-035). This may require soldering. The connector kit…

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Zero and Span Gas Guidelines

Zero and Span Gas Guidelines

LI-COR technical support often receives questions about choosing a set of CO2 calibration gases for our analyzers.   While we realize that every customer’s measurement situation may be slightly different, we do have a few suggestions for selecting a set of calibration gases.

We recommend having a zero gas, or the equipment to perform a chemical zero at the very least.  A zero gas is best if the gas is really CO2-free.   It’s not necessary to purchase pure nitrogen or argon…

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A Quick and Easy Way to Merge LI‑1500 Light Sensor Logger Files

A Quick and Easy Way to Merge LI‑1500 Light Sensor Logger Files

The LI-1500 Light Sensor Logger can log data manually, continuously, daily, or over a user-defined period. Therefore, a data set for a project can consist of many separate files. For data analysis, we often need to merge all, or parts of, these files into a single file. Here are the steps to do so:

1. Start the fv7x00 File Viewer program. If you do not have it, you can download it here:

https://www.licor.com/documents/hjwlvcpawoimow3rl35ypcwkbfoq96ni

The fv7x00 File Viewer program was…

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Studying Invasive Species: the LI-6800 Trial Winner

Studying Invasive Species: the LI-6800 Trial Winner

Invasive species can alter ecosystems and food chains. None are quite like Tamarisk, also known as salt cedar. Tamarisk sucks up a ton of water and deposits salt when it sheds its leaves, making the soil inhospitable to other plants. “There’s not much left when Tamarisk comes to town,” says Randy Long, a PhD student at the University of California, Santa Barbara.

Randy’s doctoral dissertation is studying the local adaption of Tamarisk to environmental gradients, as well as interactions of…

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