Hanna Instruments c 99 Manuel D’Utilisation

31

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.