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PhytoFlash Submersible Active Fluorometer FAQ
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Do you have any documents that explain active fluorescence?

Turner Designs offers extensive resources for many common fluorescence applications.  For specific documents regarding active fluorescence please refer to the following page:
Application Notes - Active-Fluorescence

Do you have any information on ASCII termination characters in the integration mode?

If the user wants to exit the integration mode entirely, they may send the PhytoFlash an ASCII ESC character.

There is a nice tool available that may help answer any questions related to ASCII string characters:
http://www.serial-port-monitor.com/

This tool is a serial port monitor.  It allows the user to see data in the packets that are transmitted on a serial port.  In this case, the user could set up the PhytoFlash for integrated monitoring and see the actual raw data packets that are transmitted to Hyperterminal (or equivalent).  Seeing the raw data would answer any questions concerning formatting.  For instance, it will show that the numeric data is separated by tabs, not spaces.  It will also, of course, show the termination characters for each line.

Can the PhytoFlash measure carbon fixation rates?

The PhytoFlash will not measure Carbon Fixation Rates.  However, users can calculate Carbon Fixation Rates if other measurements are taken (e.g. Carbon per cell).  So, measurements made outside the realm of the PhytoFlash can be used with the reading PhytoFlash gives to come up with Carbon Fixation Rates, Oxygen Evolution, etc.

Suggested reading:
The use of variable fluorescence measurements in aquatic ecosystems: differences between multiple and single turnover measuring protocols and suggested terminology

What are the specifications for the PhytoFlash?