User Guide

ManualsBrandsHanna Instruments ManualsMeasuring instrumentsHI 38017

• To measure chlorine in the

0-3.5 mg/L range, remove

the disc, mirror and its holder,

if pre-installed. Then install

just the disc as shown here.

• Use the pipette to fill each glass vial with

5 mL of sample (up to the mark) and

insert one of them into the left hand

opening of the checker disc. This is the

blank.

• Add to the other vial demineralized water up to the 10

mL mark and shake to mix.

• Then add to the vial the specific test reagent:

Free Chlorine: 1 packet of Total Chlorine: 1 packet of

DPD Free Chlorine reagent. DPD Total Chlorine reagent.

• Replace the cap and mix. In the case of Total Chlorine

determination, wait for 2 minutes to allow reaction to

occur. This is the reacted sample.

• Remove the cap and insert the

reacted sample into the right

hand opening of the checker

disc.

• Hold the checker disc so that a

light source illuminates the

samples from the back of the

windows.

• Keep the checker disc at a distance of 30-40 cm (12-

16") from the eyes to match the color. Rotate the disc

while looking at the color test windows and stop when

5 mL

The chemicals contained in this kit may be hazardous if

improperly handled. Read the relevant Health and Safety

Data Sheet before performing this test.

HEALTH AND SAFETYHEALTH AND SAFETY

HEALTH AND SAFETY

REFERENCESREFERENCES

REFERENCES

Adaptation of the EPA recommended DPD method 330.5.

you find the color match. Read the value in the result

window directly in mg/L (or ppm) of Chlorine.

For best results: Perform the reading three times and take

the average value (divide by 3 the sum of the three

numbers). Intensely colored samples will make the color

matching difficult and they should be adequately treated

before performing the test. Suspended matter in large

amounts should be removed by prior filtration.

Caution: Ultraviolet radiation may cause fading of colors.

When not in use, keep the disc protected from light,

in a cool and dry place.

Interferences: bromine, iodine, fluorine, ozone, oxidized

manganese and chromium.