Hanna Instruments HI 83200 User Manual

Page 49

SPECIFICATIONS

Range

6.5 to 8.5 pH

Resolution

0.1 pH

Accuracy

±0.1 pH at 25 °C

Typical EMC

±0.1 pH

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 525 nm

Method

Adaptation of the Phenol Red method. The reaction with the reagent causes a yellow
to red tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93710-0

Phenol Red Indicator

5 drops

REAGENT SETS

HI 93710-01 Reagents for 100 pH tests
HI 93710-03 Reagents for 300 pH tests
For other accessories see page 124.

MEASUREMENT PROCEDURE

• Select the

pH 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.

• Press the

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

measurement.

• Press the

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

measurement.

• Remove the cuvette.

• Add the content of one packet of the optional reagent

HI 93703-52-0 Glycine Powder. Replace the cap and
shake gently until completely dissolved.

• Add the content of one packet of HI 93757-0 Ozone

Reagent. Replace the cap and shake gently for 20 seconds.

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

• Press

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

for 2 minutes and press

Read. When the timer ends the meter will perform the reading.

• The instrument displays a concentration value refering to chlorine interference. Subtract this value from

the reading from the Standard Measurement Procedure: this will be the concentration in

mg/L of

ozone in the sample.

INTERFERENCES

Interference may be caused by: Bromine, Chlorine Dioxide, Iodine.
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.

Ozone

10 mL