Hanna Instruments Swimming Pool Vacuum Hi 3875 Users Manual Istr3875

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Instruction Manual

www.hannainst.com

Dear Customer,

Thank you for choosing a Hanna Product.

Please read the instruction sheet carefully before using the

test kit. It will provide you with the necessary information

for correct use of the kit. If you need additional information,

do not hesitate to e-mail us at tech@hannainst.com.

Remove the chemical test kit from the packing material and

examine it carefully to make sure that no damage has

occurred during shipping. If there is any noticeable dam-

age, notify your Dealer or the nearest Hanna office

immediately.

Each kit is supplied with:

•HI 93701-0 Free Chlorine Reagent, packets (100 pcs);

• Deionized Water, 1 bottle (500 mL);

• 1 checker disc (containing the disc);

• 2 glass vials with caps;

• 1 plastic pipette (3 mL).

Note: Any damaged or defective item must be returned in

its original packing materials.

ISTR3875 02/00 PRINTED IN ITALY

Chlorine is the most commonly used water disinfectant in

applications that vary from treatment of drinking water

and wastewater, pool and spa sanitization, to food process-

ing and sterilization. Chlorine present in water binds with

bacteria, leaving only a part of the original quantity (free

chlorine) to continue its disinfecting action. If the free

chlorine level is improper with respect to pH, water will have

an unpleasant taste and odor and the disinfecting poten-

tial of the chlorine will be diminished.

Free chlorine reacts with ammonium ions and organic

compounds to form chlorine compounds resulting in dimin-

ished disinfecting capabilities compared with free chlorine.

Chlorine compounds together with chloramines form com-

bined chlorine. Combined chlorine and free chlorine together

result in total chlorine.

While free chlorine has a much higher disinfectant potential,

combined chlorine has a much higher stability and has a

lesser volatility.

Note: mg/L is equivalent to ppm (parts per million).

SPECIFICATIONS

SIGNIFICANCE AND USE

CHEMICAL REACTION

INSTRUCTIONS

The reaction between chlorine and the DPD reagent causes

a pink tint in the sample which is proportional to the

chlorine concentration.

Range 0 to 3.5 mg/L (ppm) as Free Chlorine

Smallest Increment 0.1 mg/L

Analysis Method Colorimetric

Sample Size 5 mL

Number of Tests 100

Case Dimensions 235x175x115 mm (9.2x6.9x4.5")

Shipping Weight 984 g (34.7 oz.)

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT

• Use the pipette to fill each glass vial with

5 mL of sample (up to the mark).

• Insert one of the vials into the left hand opening of the

checker disc. This is the blank.

• Add to the other vial deionized water up to the 10 mL

mark. Replace the cap and shake to mix.

• Remove the cap and add 1 packet of HI 93701-0

reagent. Replace the cap and mix. 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

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.

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 SAFETY

REFERENCES

Adaptation of the EPA recommended DPD method 330.5.

5 mL

HI 3875

Free Chlorine

Medium Range

Test Kit with

Checker Disc