Posts tagged 'Fluoride test'

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Why is my LCK323 Fluoride result a minus number?

    Question. I have a Hach DR3900 and am running their LCK323 Fluoride Kit. After blanking the instrument the test itself gave a negative value, what is the likely cause? Answer. It sounds like the DR3900 needs updating with the latest software parameters for the DR3900 If you have a USB stick you can get the latest settings from the Hach website: You will¬†n...
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