# LI-6800 Help Center - [LI-6800 Help Center](https://www.licor.com/support/LI-6800/home.md): Product support landing page. ## Instruction Manual - [Instruction Manual](https://www.licor.com/support/LI-6800/manuals.md) - [1. Introduction to the LI-6800](https://www.licor.com/support/LI-6800/topics/introduction.md) - [What's What](https://www.licor.com/support/LI-6800/topics/components.md) - [Chambers, Light Sources, and Accessories](https://www.licor.com/support/LI-6800/topics/components-chambers.md) - [2. Assembling the LI-6800](https://www.licor.com/support/LI-6800/topics/assembly.md) - [Powering](https://www.licor.com/support/LI-6800/topics/powering.md) - [External Air Supply](https://www.licor.com/support/LI-6800/topics/custom-inlet-gas.md) - [Tripods](https://www.licor.com/support/LI-6800/topics/tripods.md) - [3. A Tour of the Interface](https://www.licor.com/support/LI-6800/topics/guided-tours-preparation.md) - [The Start Up Tab](https://www.licor.com/support/LI-6800/topics/startup-tab.md) - [The Constants Tab](https://www.licor.com/support/LI-6800/topics/constants-tab.md) - [The Environment Tab](https://www.licor.com/support/LI-6800/topics/environment-tab.md) - [Flow Control](https://www.licor.com/support/LI-6800/topics/environment-flow-control.md) - [H2O Control](https://www.licor.com/support/LI-6800/topics/environment-h2o-control.md) - [CO2 Control](https://www.licor.com/support/LI-6800/topics/environment-co2-control.md) - [Mixing Fan Speed](https://www.licor.com/support/LI-6800/topics/environment-mixing-fan.md) - [Temperature Control](https://www.licor.com/support/LI-6800/topics/environment-temperature-control.md) - [Light Control](https://www.licor.com/support/LI-6800/topics/environment-light-control.md) - [Auto Controls](https://www.licor.com/support/LI-6800/topics/environment-auto-controls.md) - [The Measurements Tab](https://www.licor.com/support/LI-6800/topics/measurements-tab.md) - [The Log Setup Tab](https://www.licor.com/support/LI-6800/topics/log-files-tab.md) - [The Programs Tab](https://www.licor.com/support/LI-6800/topics/programs-tab.md) - [The Tools Tab](https://www.licor.com/support/LI-6800/topics/tools-tab.md) - [4. Working with Files](https://www.licor.com/support/LI-6800/topics/logged-data.md) - [Transfering Files to a Computer](https://www.licor.com/support/LI-6800/topics/file-transfer.md) - [Directory Map](https://www.licor.com/support/LI-6800/topics/directory-map.md) - [Folders](https://www.licor.com/support/LI-6800/topics/folders-and-data-files.md) - [Summary of Symbols](https://www.licor.com/support/LI-6800/topics/symbols.md) - [5. System Tests and Messages](https://www.licor.com/support/LI-6800/topics/troubleshooting-intro.md) - [Warmup Tests](https://www.licor.com/support/LI-6800/topics/system-tests-warmup.md) - [Controller Tests](https://www.licor.com/support/LI-6800/topics/system-tests-controller.md) - [Fluorometer Tests](https://www.licor.com/support/LI-6800/topics/system-tests-fluorometer.md) - [Status Messages](https://www.licor.com/support/LI-6800/topics/troubleshooting-messages.md) - [6. Troubleshooting](https://www.licor.com/support/LI-6800/topics/troubleshooting-problems.md) - [7. Maintenance and Calibration](https://www.licor.com/support/LI-6800/topics/maintenance.md) - [Calibration](https://www.licor.com/support/LI-6800/topics/calibration.md) - [Intake Air Filter](https://www.licor.com/support/LI-6800/topics/intake-filter.md) - [Columns](https://www.licor.com/support/LI-6800/topics/columns.md) - [Head Maintenance](https://www.licor.com/support/LI-6800/topics/maintenance-head.md) - [Storing the LI-6800](https://www.licor.com/support/LI-6800/topics/storing.md) - [Preparation for Shipping](https://www.licor.com/support/LI-6800/topics/transporting.md) - [8. The Fluorescence System](https://www.licor.com/support/LI-6800/topics/fluorometer-introduction.md) - [What's What](https://www.licor.com/support/LI-6800/topics/fluorometer-components.md) - [Installing the Fluorometer](https://www.licor.com/support/LI-6800/topics/chamber-fluorometer-installation.md) - [Fluorometer Controls](https://www.licor.com/support/LI-6800/topics/fluorometer-controls.md) - [The Fluorometer Tour](https://www.licor.com/support/LI-6800/topics/fluorometer-tour.md) - [Chlorophyll Fluorescence Measurments](https://www.licor.com/support/LI-6800/topics/fluorometer-experiments.md) - [Optimizing Flash Settings](https://www.licor.com/support/LI-6800/topics/fluorometer-settings-optimization.md) - [Fluorescence Analysis Tools](https://www.licor.com/support/LI-6800/topics/fluorescence-analysis-tools.md) - [The FlashAnalysis Application](https://www.licor.com/support/LI-6800/topics/flash-analysis-app.md) - [Custom Flash Events](https://www.licor.com/support/LI-6800/topics/custom-flash-events.md) - [Custom Events Parameter Reference](https://www.licor.com/support/LI-6800/topics/custom-events-parameter-reference.md) - [Custom Events Meta Commands](https://www.licor.com/support/LI-6800/topics/custom-events-meta-commands.md) - [Custom Events File Structure](https://www.licor.com/support/LI-6800/topics/custom-events-file-structure.md) - [User-defined Meta Extras](https://www.licor.com/support/LI-6800/topics/user-defined-meta-extras.md) - [Maintenance](https://www.licor.com/support/LI-6800/topics/maintenance-fluorometer.md) - [References](https://www.licor.com/support/LI-6800/topics/references.md) - [9. Leaf Chambers](https://www.licor.com/support/LI-6800/topics/leaf-chambers-intro.md) - [What's What](https://www.licor.com/support/LI-6800/topics/chambers-overview.md) - [Installing the Small Chamber and Light Source](https://www.licor.com/support/LI-6800/topics/chamber-3x3.md) - [Leaf Chamber Controls](https://www.licor.com/support/LI-6800/topics/leaf-measurement-controls.md) - [Making leaf-level measurements](https://www.licor.com/support/LI-6800/topics/making-leaf-level-measurements.md) - [Matching the IRGAs](https://www.licor.com/support/LI-6800/topics/matching-the-analyzers.md) - [Dynamic Assimilation Technique](https://www.licor.com/support/LI-6800/topics/dynamic-assimilation-technique.md) - [Leaf Measurement Examples](https://www.licor.com/support/LI-6800/topics/leaf-measurement-examples-intro.md) - [Carbon Dioxide Response Curves](https://www.licor.com/support/LI-6800/topics/co2-response-curves.md) - [Light Response Curves](https://www.licor.com/support/LI-6800/topics/light-response-curves.md) - [Fluorescence and gas exchange experiments](https://www.licor.com/support/LI-6800/topics/fluorometer-gas-exchange-experiments.md) - [More Chamber Options](https://www.licor.com/support/LI-6800/topics/chambers-more-options.md) - [Installing the Large Chamber and Light Source](https://www.licor.com/support/LI-6800/topics/chamber-6x6.md) - [Light Source Extension Cable](https://www.licor.com/support/LI-6800/topics/light-source-extension-cable.md) - [Sprig Adapter Kit](https://www.licor.com/support/LI-6800/topics/sprig-blocks.md) - [Bryophyte Chamber](https://www.licor.com/support/LI-6800/topics/chamber-bryophyte.md) - [Small Plant Chamber](https://www.licor.com/support/LI-6800/topics/chamber-plant.md) - [Insect Respiration Chamber](https://www.licor.com/support/LI-6800/topics/chamber-insect.md) - [Custom Chamber Adapter](https://www.licor.com/support/LI-6800/topics/chamber-custom.md) - [Auxiliary Channels](https://www.licor.com/support/LI-6800/topics/auxiliary-channels.md) - [Maintenance](https://www.licor.com/support/LI-6800/topics/maintenance-chambers.md) - [Leaf Temperature Thermocouple](https://www.licor.com/support/LI-6800/topics/leaf-thermocouple.md) - [Replacing the Chamber Ducts](https://www.licor.com/support/LI-6800/topics/chamber-ducts.md) - [LED Source Maintenance](https://www.licor.com/support/LI-6800/topics/led-source-maintenance.md) - [Mass Balance Derivation](https://www.licor.com/support/LI-6800/topics/mass-balance-derivation.md) - [10. Aquatic Chamber](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-intro.md) - [What's What](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-components.md) - [Installing the Aquatic Chamber](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-installation.md) - [The Aquatic Chamber Controls](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-software.md) - [Preparing for Measurements](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-preparing.md) - [Measuring Media Response Time](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-response-time.md) - [Determining Light Transfer Through a Sample](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-light-transfer.md) - [Tips For Success](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-tips.md) - [Manual Photosynthesis Irradiance Response](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-irradiance-manual.md) - [PI Response with a simple Program](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-irradiance-ap.md) - [PI Response with a Background Program](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-irradiance-bp.md) - [More Options](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-more-options.md) - [Using a pH Probe or Auxiliary Sensor](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-auxiliary-sensors.md) - [Controlling Temperature with a Water Bath](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-temperature-control.md) - [Measuring the Sub-sample Loop Flow Rate](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-subsample-flow-rate.md) - [Auxiliary Channels with Aquatic](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-auxiliary-channels.md) - [Troubleshooting](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-troubleshooting.md) - [Maintenance](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-maintenance.md) - [Removing the Aquatic Chamber](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-removing.md) - [References](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-references.md) - [11. Soil Chamber](https://www.licor.com/support/LI-6800/topics/soil-chamber-intro.htm#top) - [What's What](https://www.licor.com/support/LI-6800/topics/soil-chamber-summary.md) - [Installing the Soil Chamber](https://www.licor.com/support/LI-6800/topics/soil-chamber-preparations.md) - [The Soil Chamber Controls](https://www.licor.com/support/LI-6800/topics/soil-chamber-software.md) - [Preparing for Soil Measurements](https://www.licor.com/support/LI-6800/topics/soil-chamber-collars.md) - [Measurement Tutorial](https://www.licor.com/support/LI-6800/topics/soil-chamber-tutorial.md) - [Variables and constants](https://www.licor.com/support/LI-6800/topics/soil-chamber-variables.md) - [Troubleshooting](https://www.licor.com/support/LI-6800/topics/soil-chamber-troubleshooting.md) - [Maintenance](https://www.licor.com/support/LI-6800/topics/soil-chamber-maintenance.md) - [12. Trace Gas Measurements](https://www.licor.com/support/LI-6800/topics/tga-intro.md) - [Installing the Kit](https://www.licor.com/support/LI-6800/topics/tga-installation.md) - [Elements of the Interface](https://www.licor.com/support/LI-6800/topics/tga-interface-tour.md) - [Operational Guidelines](https://www.licor.com/support/LI-6800/topics/tga-operational-guidelines.md) - [Warmup Procedure](https://www.licor.com/support/LI-6800/topics/tga-warmup-procedure.md) - [Calibrating the TGA](https://www.licor.com/support/LI-6800/topics/tga-calibration-procedure.md) - [Isotopic Calibrations](https://www.licor.com/support/LI-6800/topics/tga-isotopic-calibrations.md) - [TGA and User Configuration](https://www.licor.com/support/LI-6800/topics/tga-user-confgurations.md) - [Example: Light Response](https://www.licor.com/support/LI-6800/topics/tga-example-light-response.md) - [Example: CO2 Response](https://www.licor.com/support/LI-6800/topics/tga-example-co2-response.md) - [TGA Reference](https://www.licor.com/support/LI-6800/topics/tga-reference.md) - [TGA Data and Groups](https://www.licor.com/support/LI-6800/topics/tga-data-and-groups.md) - [TGA Isotopic Calibration Details](https://www.licor.com/support/LI-6800/topics/tga-isotopic-calibration-details.md) - [User I/O Controls](https://www.licor.com/support/LI-6800/topics/tga-user-io-controls.md) - [Backgroud Program Tools for TGAs](https://www.licor.com/support/LI-6800/topics/tga-background-program-tools.md) - [Trace Gas Analysis References](https://www.licor.com/support/LI-6800/topics/tga-references.md) - [13. Background Programs](https://www.licor.com/support/LI-6800/topics/background-program-things-to-know.md) - [Overview of Background Programs](https://www.licor.com/support/LI-6800/topics/background-program-overview.md) - [Creating Custom Dialogs](https://www.licor.com/support/LI-6800/topics/background-program-dialogs.md) - [Some Example Programs](https://www.licor.com/support/LI-6800/topics/background-program-examples.md) - [Response Curve Programs](https://www.licor.com/support/LI-6800/topics/background-program-response-curves.md) - [Background Program Screen Reference](https://www.licor.com/support/LI-6800/topics/background-program-screen-details.md) - [Background Program Step Reference](https://www.licor.com/support/LI-6800/topics/background-program-step-reference.md) - [Control Dictionary Map](https://www.licor.com/support/LI-6800/topics/background-program-control-dictionary-map.md) - [Status Dictionary Map](https://www.licor.com/support/LI-6800/topics/background-program-status-dictionary-map.md) - [The list_utility Module](https://www.licor.com/support/LI-6800/topics/background-program-list-utility.md) - [Controlling Custom Events](https://www.licor.com/support/LI-6800/topics/custom-events-controlling-bp.md) - [14. Specifications](https://www.licor.com/support/LI-6800/topics/specifications.md) ## Documents - [Documents](https://www.licor.com/support/LI-6800/docs.md) - [Going on a field trip?](https://www.licor.com/support/LI-6800/topics/ttp-going-on-a-field-trip.md) - [Emailing Data Files Automatically](https://www.licor.com/support/LI-6800/topics/ttp-sending-emails-automatically.md) - [Making One-side Leaf Measurements](https://www.licor.com/support/LI-6800/topics/one-sided-leaf-measurements.md) - [Building a Large Prompt List](https://www.licor.com/support/LI-6800/topics/ttp-building-a-large-prompt-list.md) - [Gassing up your LI-6800](https://www.licor.com/support/LI-6800/topics/ttp-gassing-up-your-6800.md) - [Leaf-level O2 and CO2 measurements](https://www.licor.com/support/LI-6800/topics/leaf-level-O2-measurements.md) - [Setting the Thermocouple Height](https://www.licor.com/support/LI-6800/topics/ttp046-thermocouple-height.md) - [Resolving a Leak Issue](https://www.licor.com/support/LI-6800/topics/ttp055-leaks.md) - [Prepare the LI-6800 for shipping](https://www.licor.com/support/LI-6800/topics/ttp045-shipping-recommendations.md) - [Replacing the Wheels](https://www.licor.com/support/LI-6800/topics/ttp054-wheels.md) - [Considerations for Curve Fitting DAT Data](https://www.licor.com/support/LI-6800/topics/dynamic-assimilation-and-curve-fitting.md) - [Controlling via VNC](https://www.licor.com/support/LI-6800/topics/ttp061-vnc-remote-connection.md) - [Installing the LI-190R](https://www.licor.com/support/LI-6800/topics/install-the-li190r-on-the-li6800.md) - [CO2 Cartridges](Photosynthesis/topics/ttp051-co2-cartridges.md) - [Custom Chamber Note](https://www.licor.com/support/LI-6800/topics/chamber-custom-note.md) - [Small Plant Chamber Note](https://www.licor.com/support/LI-6800/topics/chamber-plant-note.md) - [Using Light Sources and Leaf Chambers](https://www.licor.com/support/LI-6800/topics/light-sources.md) - [Aquatic Sample Adapter](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-sample-adapter.md) - [Equilibrator Upgrade](https://www.licor.com/support/LI-6800/topics/chamber-aquatic-equilibrator-upgrade.md) - [Volume, Flow, and Mixing Considerations](https://www.licor.com/support/LI-6800/topics/volume-flow-and-mixing.md) - [FlashAnalysis Application](Photosynthesis/topics/flash-analysis-application.md) - [Setting H2O Spans with the DG-4](AppNotes/setting-h2o-span-with-DG4.md) - [Complimentary Photosynthesis Measurements with the LI-600 and LI-6800](Photosynthesis/topics/complementary-photosynthesis-measurements.md) - [Comparing Conductance Measurements from the LI-600 and LI-6800](Photosynthesis/topics/comparing-conductance-measurements.md) - [Software Change Log](https://www.licor.com/support/LI-6800/topics/change-log.md) - [What's New in Version 2.2](https://www.licor.com/support/LI-6800/topics/whats-new-in-2.2.md) ## Videos - [Videos](https://www.licor.com/support/LI-6800/videos.md) - [Unpacking the LI-6800](https://www.licor.com/support/LI-6800/videos/unpacking-the-li-6800.md) - [Filling the Columns](https://www.licor.com/support/LI-6800/videos/chemical-columns.md) - [Installing the LI-190R](https://www.licor.com/support/LI-6800/videos/installing-the-LI-190R-on-the-LI-6800.md) - [Software Overview](https://www.licor.com/support/LI-6800/videos/software-intro.md) - [Warmup and System Tests](https://www.licor.com/support/LI-6800/videos/system-tests.md) - [Power Options](https://www.licor.com/support/LI-6800/videos/power-options.md) - [Controlling from a Computer](https://www.licor.com/support/LI-6800/videos/controlling-from-a-computer.md) - [Connecting an Air Supply](https://www.licor.com/support/LI-6800/videos/connecting-an-air-supply.md) - [Installing the 3x3 cm Chamber and Light Source](https://www.licor.com/support/LI-6800/videos/install-small-leaf-chamber.md) - [Installing the Fluorometer](https://www.licor.com/support/LI-6800/videos/install-fluorometer.md) - [Installing the Bryophyte Chamber](https://www.licor.com/support/LI-6800/videos/install-bryophyte-chamber.md) - [Swapping Leaf Chamber Springs](https://www.licor.com/support/LI-6800/videos/leaf-chamber-springs.md) - [Tracking Ambient Light](https://www.licor.com/support/LI-6800/videos/configure-light-source-to-track-ambient.md) - [Setting Stability Criteria](https://www.licor.com/support/LI-6800/videos/setting-stability-criteria.md) - [Prompts, Constants, and Computed Values](https://www.licor.com/support/LI-6800/videos/prompts-constants-computed-values.md) - [Introduction to Range Matching](https://www.licor.com/support/LI-6800/videos/introduction-to-range-matching.md) - [Introduction to Background Programs](https://www.licor.com/support/LI-6800/videos/making-background-programs.md) - [Basic Survey Measurement](https://www.licor.com/support/LI-6800/videos/survey-measurement.md) - [Measuring Electron Transport Rate](https://www.licor.com/support/LI-6800/videos/etr-measurement.md) - [Measuring Non-photochemical Quenching](https://www.licor.com/support/LI-6800/videos/npq-measurement.md) - [CO2 Response Curves with DAT](https://www.licor.com/support/LI-6800/videos/dynamic-assimilation-technique.md) - [Viewing Data on the Console](https://www.licor.com/support/LI-6800/videos/viewing-logged-data.md) - [Downloading Data](https://www.licor.com/support/LI-6800/videos/downloading-data.md) - [Maintenance Overview](https://www.licor.com/support/LI-6800/videos/maintenance-overview.md) - [Exending the Sodalime](https://www.licor.com/support/LI-6800/videos/extend-soda-lime.md) - [Replacing Leaf Chamber Gaskets](https://www.licor.com/support/LI-6800/videos/leaf-chamber-gaskets.md) - [Replacing Column Air Filters](https://www.licor.com/support/LI-6800/videos/replacing-column-air-filters.md) - [Replacing Head Air Filters](https://www.licor.com/support/LI-6800/videos/replacing-head-air-filters.md) - [Replacing the Leaf Temperature Thermocouple](https://www.licor.com/support/LI-6800/videos/replacing-leaf-temperature-thermocouple.md) - [Replacing the Console Air Filter](https://www.licor.com/support/LI-6800/videos/replacing-the-console-air-filter.md) - [Cleaning the Screen](https://www.licor.com/support/LI-6800/videos/cleaning-the-screen.md) - [Cleaning the Gas Analyzer Optics](https://www.licor.com/support/LI-6800/videos/cleaning-the-irga.md) - [Introduction to the Aquatic Chamber](https://www.licor.com/support/LI-6800/videos/aquatic-chamber-overview.md) - [Using the Aquatic Chamber](https://www.licor.com/support/LI-6800/videos/aquatic-chamber.md) - [Installing the Soil Chamber](https://www.licor.com/support/LI-6800/videos/installing-the-soil-chamber.md) - [Overview of the Soil CO2 Flux Software](https://www.licor.com/support/LI-6800/videos/soil-chamber-software.md) - [Innovations in Fluorescence](https://www.licor.com/support/LI-6800/videos/fluorescence-intro.md) ## FAQs - [FAQs](https://www.licor.com/support/LI-6800/faqs.md) ## Software - [Software](https://www.licor.com/support/LI-6800/software.md) ## Factory Calibration - [Factory Calibration](https://www.licor.com/support/LI-6800/factory-calibration.md)