Hanna Instruments HI 93710 - Manual (Page 34)

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FREE CHLORINE MEASUREMENT FREE CHLORINE MEASUREMENT FREE CHLORINE MEASUREMENT FREE CHLORINE MEASUREMENT FREE CHLORINE MEASUREMENT
H I 9
3 7 0 1
• Fill the cuvet up to the mark with
10 mL of unreacted sample and
replace the cap.
• Place the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
• Press ZERO and "SIP" will ap-
pear 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 the content of one packet of HI 93701 DPD
reagent. Replace the cap and shake gently.
• Reinsert the cuvet into the instrument.
• Press READ and the display will
show "SIP" during measure-
ment.
• The instrument directly displays concentration in mg/L of free
chlorine on the Liquid Crystal Display.
Liquid reagents procedure
• Add 3 drops of HI 93701A-F DPD1 indicator and 3 drops of
HI 93701B-F DPD1 buffer to another cuvet. Shake gently before
adding 10 mL of unreacted sample. Replace the cap and shake
gently again.
ZERO
Free Chlorine
10 mL
x 3 x 3