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How to Correct an Erroneous Calibration for the LI-7700 Open Path Methane Analyzer

How to Correct an Erroneous Calibration for the LI-7700 Open Path Methane Analyzer

The LI-77000 analyzer provides the facility for users to calibrate using standard calibration gases. This option can be used to assure users that the instrument is performing according to specification. However, a mistake or an error in the calibration of the LI-7700 will result in incorrect zero (kz) and span (ks) multipliers. As a result, the computed methane density according to equation 6-12 of the LI-7700 Instruction Manual will be incorrect.

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How to Routinely Check an Eddy Covariance System to Ensure Normal Operation

How to Routinely Check an Eddy Covariance System to Ensure Normal Operation

Most eddy covariance (EC) systems are deployed in remote areas and exposed to harsh environmental conditions. During years-to-decades of continuous operation, potential issues related to contamination, power, animal damage, lightning, and other natural events such as fog and precipitation can arise. Aging of the hardware and out-of-date software could also become issues. In order to minimize data loss, routinely checking your EC system should be part of your maintenance plan. Considering time consumption and effectiveness, here are our recommendations:

  1. Check…

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Control Over Drought

Control Over Drought

Water is one of the most precious natural resources—and one that we often take for granted. But droughts are common and they’ve proven time and time again that we don’t know enough about the water cycle. That is why the Chinese Ecosystem Research Network (CERN) selected LI-COR eddy covariance systems to measure evapotranspiration across the country. Recently the Water and Waste Digest interviewed Dave Johnson, Senior Product Manager, to learn more about how the Chinese Ecosystem Research Network is using evapotranspiration to…

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EDF/Google Earth/CSU Project Uses LI-COR Analyzer to Detect and Map Urban Methane Leaks

EDF/Google Earth/CSU Project Uses LI-COR Analyzer to Detect and Map Urban Methane Leaks

Measuring methane and other gas leaks from the pipes beneath America’s largest cities will help track preventable sources of environmental pollution. Cars equipped with methane measuring instruments to map leaks within cities is part of a major joint initiative. LI-COR Biosciences, a world leader in instrument systems for environmental research, today announced its involvement in this major initiative of the Environmental Defense Fund (EDF), Google Earth Outreach, and Colorado State University (CSU).

LI-COR provides a unique measurement technology – the LI-7700 Open Path CH4 Analyzer…

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Recent Publications using the LI-7700 Open Path Methane Analyzer

Recent Publications using the LI-7700 Open Path Methane Analyzer

The LI-7700 Open Path Ch4 Analyzer is a lightweight, low power, low maintenance analyzer  ideal for making high performance measurements in extreme environments. But don’t take our word for it – see how other researchers are using this analyzer to achieve high quality results:

  • Alberto, Ma C. R, Reiner Wassmann, Roland J. Buresh, James R. Quilty, Teodoro Q. Correa, Joseph M. Sandro, and Caesar A. R. Centeno. “Measuring Methane Flux from Irrigated Rice Fields by Eddy Covariance Method Using…

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