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What can I do if the 10AU Auto Range setting is not working?
This procedure will erase your calibration data.  Your 10AU will need to be recalibrated after you complete this procedure.

    1)     Check screen 2.0 to make sure that the gain control is set to AUTO.

    2)     Write down your current settings, for example: note all of the settings on screen 2.0. Also write down the temperature compensation values at screen 1.7.  Pressing the Back Arrow key from the Home page gives you the Full Scale Concentration values.

    3)     Go to diagnostic screen 3.2 and press the following five keys *0521

    4)     Select item 3, Reset NVRAM

    5)     Press the 0 key ten times and you will see the display flash and go back to the initial start up screen.

fluorometer