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Thread: Calibration

  1. #1

    Default Calibration

    Hello guys,

    i have the Hanna Instruments model HI-98129, pH, TDS, Ec and temperature meter (the black). i wanted to ask if anyone knows after how many uses should i do calibration?

    Thanks for advance.
    http://www.hydroponicsworld.info - Everything about hydroponics

  2. #2
    Join Date
    Dec 2009
    Posts
    2

    Default Calibrating instruments

    From practical experience, if you want to maintain tight controls, about 10 uses per cal.

    Rgds,

    Steve
    N. Texas

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