38Total Chlorine
• Press ZERO and “SIP” will blink on the display.
• Wait for a few seconds and the display will
show “-0.0-”. Now the meter is zeroed
and ready for measurement.
• Remove the cuvet.
Powder reagents procedure
• Add 1 packet of HI 93711
reagent. Replace the cap and
shake gently for 20 seconds
(or 2 minutes in case of sea-
water analysis).
• Reinsert the cuvet 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 DIRECT. In both cases “SIP” will blink during
measurement.
• The instrument directly displays concentration in mg/L of total
chlorine on the Liquid Crystal Display.
Liquid reagents procedure
• To an empty cuvet
add 3 drops of HI
93701A-T DPD1
indicator, 3 drops of
HI 93701B-T DPD1 buffer
and 1 drop of HI 93701C
DPD solution. Swirl
gently to mix and
immediately add 10
x 3
x 3
x 1
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