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• Add 1 drop of HI93720C‑0 Calcium Hardness Reagent C to one cuvette (#1).
• Replace the cap and invert the cuvette several times to mix.
This is the blank.
• Place the blank (#1) into the holder and close the lid.
• Press the Zero key. The display will show “‑0.0‑” when the meter is zeroed and ready for
measurement.
• Remove the blank (#1) and insert the second cuvette (#2)
into the instrument.
• Press Read to start the reading. The instrument displays concentration in mg/L of calcium
carbonate (CaCO
3
).
• Press or to access the second level functions.
# 2
# 1
HARDNESS, CALCIUM
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