31
Free Chlorine
10 mL
FREE CHLORINEFREE CHLORINE
FREE CHLORINEFREE CHLORINE
FREE CHLORINE
SPECIFICATIONS
Range 0.00 to 2.50 mg/L
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading
Typical EMC ±0.01 mg/L
Deviation
Light Source Tungsten lamp with narrow band interference
filter @ 525 nm
Method Adaptation of the EPA DPD method 330.5. The
reaction between free chlorine and the DPD re-
agent causes a pink tint in the sample.
REQUIRED REAGENTS
POWDER:
Code Description Quantity
HI 93701-0 DPD 1 packet
LIQUID:
Code Description Quantity
HI 93701A-F DPD1 Indicator 3 drops
HI 93701B-F DPD1 Buffer 3 drops
REAGENT SETS
HI 93701-F Reagents for 300 tests (liquid)
HI 93701-01 Reagents for 100 tests (powder)
HI 93701-03 Reagents for 300 tests (powder)
For other accessories see page 141.
MEASUREMENT PROCEDURE
• Select the program number corresponding to Free Chlorine on the
secondary LCD by pressing PROGRAM W and V.
• Fill the cuvet with 10 mL of unreacted sample (up
to the mark) and replace the cap.
• Place the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
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