Hanna Instruments HI 83200C User Manual

Page 17

F R E E C H L O R I N E

SPECIFICATIONS

Range

0.00 to 2.50 mg/L

Resolution

0.01 mg/L

Accuracy

±0.03 mg/L ±3% of reading at 25 °C

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 reagent causes a pink tint in the sample.

REQUIRED REAGENTS

POWDER

Code

Description

Quantity

HI 93701-0

DPD

1 packet

LIQUID:
Code

Description

Quantity

HI 93701

A-F

DPD1 Indicator

3 drops

HI 93701

B-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 128.

MEASUREMENT PROCEDURE

• Select the

Free Chlorine method using the procedure described

in the

Method Selection section (see page 12).

• Fill the cuvette with 10 mL of unreacted sample (up to the

mark) and replace the cap.

• Place the cuvette into the holder and close the lid.

Free Chlorine

FREE CHLORINE

• Press

Timer or wait for 5 minutes. Then invert again

the cuvette 10 times to mix (about 15 seconds).

• Reinsert the cuvette into the instrument.

• Press

Read to start the reading. The instrument displays the results in mg/L of Calcium.

INTERFERENCES:

Interferences may be caused by:
Acidity (as CaCO

) above 1000 mg/L

Alkalinity (as CaCO

) above 1000 mg/L

Magnesium (Mg

) above 400 mg/L

• Replace the cap and invert several times to mix.

• Place the cuvette into the holder and close the lid.

• Press the

Zero key. The display will show “-0.0-” when

the meter is zeroed and ready for measurement.

• Remove the cuvette.

• Using the 1 mL syringe, add exactly 1 mL of the

HI 93752B-0 Calcium Oxalate Reagent. Replace the
cap and invert the cuvette 10 times to mix (about
15 seconds).

Calcium

10 mL