LI-6400/6400XT Frequently Asked Questions

• Can I upgrade my LI-6400 to an LI-6400XT?
• Yes, the 6400-926 XT Upgrade Kit is now available. This kit can be installed in the field, or can be returned to LI-COR or your LI-COR distributor for installation. Click here for more information.
• Are LI-6400 chambers and accessories compatible with the new LI-6400XT, and vice-versa?
• Yes. The LI-6400XT console received some significant upgrades, but the sensor heads of both instruments are identical. All chambers are interchangeable, as are accessories such as chemicals, thermocouples, batteries, the AC Power Supply, and the new Expanded Temperature Control Kit. OPEN 6.x software can be run on either the 200 MHz or 400 MHz (LI-6400XT) boards.
• Do you have a list of common spare parts?
• Yes, you can download a list of spare parts here.
• How do I recompute stored files?
• You can recompute LI-6400/6400XT data files in either of two different ways; on your PC, or in the LI-6400/6400XT. Click here to read how to recompute data files on your PC. Click here to read how to recompute data files in the LI-6400.
• What solvent do you recommend to remove gasket adhesive?
• If the gasket has not been in place long, you should be able to easily remove it by pulling the gasket off by one corner of the adhesive. Another method that is effective is to use the unused center of the gasket, peel the backing off, and use the sticky surface to pull off the remainder of the adhesive.
  
  If the gasket has been in place a long time, the adhesive is not so easy to remove. We recommend using a de-greaser such as DX440 or 330 marketed by PPG, which will not harm the paint and dissolves the adhesive well.
• How often should I replace my chemicals?
• Drierite desiccant is indicating, so when the color has changed, or the extent of chamber humidity control is not enough, replace with dried chemical. The frequency of replacement varies considerably from location to location and experiment to experiment, and could last as little as a couple of hours to as long as a month or more.
  
  The soda lime that is shipped from LI-COR is indicating, turning purple when spent. Soda lime usually becomes exhausted because it dries out. Therefore, by adding a couple of ml of water to the tube, capping the tube, and shaking it to disperse the water will extend the life of your soda lime from weeks to a month or more.
• What chamber should I use?
• We would like to discuss the best options for your specific application, so please contact us at (800)447-3576 or send an e-mail to envsales@licor.com.
• How could I design my own chamber to use with the LI-6400/6400XT system?
• We have two application notes that discuss how to design your own chamber to be used with the system. Application Note #2 is entitled "Measuring Canopy Gas Exchange with the LI-6400 Portable Photosynthesis System". Application Note #3 is entitled "Interfacing Custom Chambers to the LI-6400 Sensor Head".
• How do I hook up external sensors to my auxiliary port?
• Application Note #1 describes how to hook up external sensors to the LI-6400/6400XT auxiliary port.