LaMotte HYDROPONICS KIT 3561-01 - Manual (Page 4)

6. Shake the tube again. Remove cap and slowly insert the square tube with the collar.
The square tube will slide up and down through the collar and fi ll with liquid.
7. Viewing from above, adjust the square tube into the turbid solution until the black
dot on its base is obscured. Hold the round tube at the top to avoid blocking light.
Record the height of the liquid in the square tube on the scale. Calibrations
represent parts per million potassium. If the original sample has been diluted 1
to 5, the reading should be multiplied by 5 to obtain the potassium content of the
original sample.
NOTE: Brush tubes thoroughly after each use.
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