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Category: LI-7700

LI-7700 Open Path CH4 Analyzer

Changing Seasons With Your Eddy Covariance System: Tips and Tricks

Changing Seasons With Your Eddy Covariance System: Tips and Tricks

It is good practice to give your instrumentation routine maintenance as the seasons change. Below is a list of tips to help keep your Eddy Covariance System running in top shape.

Gas Analyzers: LI-7500A/RS/DS and LI-7200/RS CO2/H2O Analyzers

  • Check your software version and update to the latest instrument software, if necessary. Go here to update LI-7500A/RS/DS software, or here for LI-7200/RS software.
  • Check when the analyzer was last factory-calibrated, noting the recommended frequency.
  • Replace the internal…

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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 Aging of the hardware and out-of-date software could also become issues.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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Diagnostic Settings for the LI-7500/7500A/7200/7700 in EddyPro Software

Diagnostic Settings for the LI-7500/7500A/7200/7700 in EddyPro Software

Diagnostics are used to indicate whether your instrument is operating correctly. The LI-7500 and LI-7500A Open Path CO2/H2O Analyzers output integers between 0 and 255 that correspond to as many as 5 diagnostic values. The diagnostic values of the LI-7200 Enclosed CO2/H2O Analyzer and LI-7700 Open Path CH4 Analyzer are integers between 0 and 65535 that indicate up to 10 and 16 diagnostics, respectively. A detailed explanation of the diagnostic values for the LI-7500A and LI-7200 and how to decipher…

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LI-COR Analyzers Monitoring Carbon Dioxide Worldwide as Atmospheric Levels Reach 400 parts per million

LI-COR Analyzers Monitoring Carbon Dioxide Worldwide as Atmospheric Levels Reach 400 parts per million

On May 13, the National Oceanic and Atmospheric Administration (NOAA) reported a preliminary daily average carbon dioxide (CO2) reading of 400.07 parts per million (ppm) at the Mauna Loa Observatory on the Big Island of Hawaii.

On May 9, a reading over 400 ppm was reported at the site for the first time ever. But that reading (400.03 ppm) was later revised to 399.89 ppm. The first CO2 measurement at the observatory was 313 ppm in 1958. According to the…

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