User Guide

Free Chlorine

10 mL

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.