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.