Hanna-instruments HI 83266 Instrukcja Użytkownika Pobierz pdf (Strona 15)

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• Press the Zero key. The meter will show “-0.0-” when the meter is zeroed and ready for measurement.

• Remove the cuvette.

• Add the content of one packet of HI 93701-0 DPD reagent. Replace

the cap and shake gently for 20 seconds.

• Reinsert the cuvette into the instrument.

• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait

for 1 minute and press Read. When the timer ends the meter will perform the reading.

Free Chlorine

INTERFERENCES

Interference may be caused by: Bromine, Chlorine Dioxide, Iodine, Ozone (all these interferences give positive errors).

Alkalinity above 250 mg/L CaCO

will not reliably develop the full amount of color or it may rapidly fade.

To resolve this, neutralize the sample with diluted HCl.

In case of water with hardness greater than 500 mg/L CaCO

, shake the sample for approximately

2 minutes after adding the powder reagent.

• The instrument displays the results in mg/L of free chlorine.

Total Chlorine

TOTAL CHLORINE

SPECIFICATIONS

Range 0.00 to 5.00 mg/L

Resolution 0.01 mg/L from 0.00 to 2.50 mg/L;

0.10 mg/L above 2.50 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 method 330.5 and

Standard Methods for the Examination of

Water and Wastewater, 20

edition

, 4500-Cl G. The reaction between chlorine and the

DPD reagent causes a pink tint in the sample.

REQUIRED REAGENTS

POWDER:

Code Description Quantity

HI 93711-0 DPD Powder Reagent 1 packet

REAGENT SETS

HI 93711-01 Reagents for 100 tests

HI 93711-03 Reagents for 300 tests

For other accessories see page 46.

MEASUREMENT PROCEDURE

• Select the

Total Chlorine

method using the procedure described in the

Method Selection

section (see page 15).

• 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.

10 mL

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