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Category: General

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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Solar Eclipse Data from LI-COR

Solar Eclipse Data from LI-COR

On Monday, the LI-COR campus was in the path of totality for the August 21, 2017 solar eclipse. Here are data collected during the eclipse at our campus in Lincoln, Nebraska, USA. Even though cloud cover obscured our direct view of the eclipse, there were observable differences in light intensity, photosynthesis measurements, and environmental flux during totality.

The partial eclipse began around 11:37 AM CST, with totality happening from 1:02 PM to 1:04 PM. The eclipse was over by 2:37…

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R3 and HS Sonic Anemometer Configuration

R3 and HS Sonic Anemometer Configuration

The Gill R3 and HS series of anemometers can be connected to the LI-7550 to collect data on a USB drive.  This can facilitate remote data monitoring and collection through the available Ethernet connectivity.

The anemometer will have to be preconfigured to send data out in the required format. This can be achieved using any serial communication software like Windows HyperTerminal or Tera Term (which can be downloaded for free here). You can also use the WindCom or RCom2…

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