37
Total Chlorine
• Press the Zero key. The meter will show “-0.0-” when the meter is zeroed and ready for measurement.
• Remove the cuvette.
Powder reagents procedure
• Add 1 packet of HI 93711 DPD reagent. Replace the cap and
shake gently for 20 seconds (or 2 minutes for seawater analysis).
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the
measurement or, alternatively, wait for 2 minutes and 30 seconds
and press Read. When the timer ends the meter will perform the
reading. The instrument displays the results in mg/L of total
chlorine.
Liquid reagents procedure
• To an empty cuvette add 3 drops of
HI 93701A-T DPD1 indicator, 3 drops of
HI 93701B-T DPD1 buffer and 1 drop of
HI 93701C DPD3 solution. Swirl gently to
mix and immediately add 10 mL of unreacted
sample. Replace the cap and shake gently
again.
• Reinsert the cuvette into the instrument.
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