Quantities and Units
You can select between 1 and 3 quantities to display at one time. The options are:
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PPB (Parts Per Billion Water – by volume)
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Tdf (Dew Point / Frost Point Temperature)
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PPM (Parts Per Million Water – by volume)
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PPMW (Parts Per Million Water – by weight)
For Dew Point, the units can be selected by pressing the “UNIT” button.