Hanna-instruments HI 93718 User Manual download pdf (Page 2)

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

MEASUREMENT PROCEDURE

• Turn the meter on by pressing ON/OFF.

• When the LCD displays "- - -", it is

ready.

• Fill the cuvet up to 1.5 cm (¾") below the

rim with 10 mL of unreacted sample and

replace the cap.

• Place the cuvet into the holder

and ensure that the notch on

the cap is positioned securely

into the groove.

• Press ZERO and "SIP" will appear on the display.

• Wait for a few seconds and the dis-

play will show "-0.0-". Now the meter

is zeroed and ready for measure-

ment.

• Remove the cap and add

the content of one packet of

HI 93718 reagent. Replace

the cap and shake gently.

• Reinsert the cuvet into the in-

strument.

1.5 cm

OFF

ZERO

2’30"

READ

DIRECT

READ

TIMED

• Press READ TIMED and the display will show the count-

down prior to the measurement, or, alternatively wait

for 2 minutes and 30 seconds and press READ DIRECT.

In both cases "SIP" will appear during measurement.

• The instrument directly displays concentration in mg/L of

iodine on the Liquid Crystal Display.

INTERFERENCES

Interference may be caused by:

Bromine

Chlorine

Ozone

Oxidized forms of chromium and manganese

Alkalinity above 300 mg/L and acidity above 150 mg/L as

CaCO

require neutralization since the color could instantly

fade. To resolve this, neutralize the sample with diluted HCl

or NaOH.

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

CaCO

, shake the sample for approximately 1 minute after

adding the reagent.

The instruction listed below should be carefully followed

during testing to ensure best accuracy.

• Do not touch the cuvet walls with hands.

• In order to maintain the same conditions during the

zeroing and the measuring phases, it is necessary to

close the cuvet to prevent any contamination.

• Do not let the test sample stand too long after reagent

is added or accuracy will be lost.

• Whenever the cuvet is placed into the measurement cell,

it must be completely free of fingerprints, oil or dirt.

Wipe it thoroughly with HI 731318 or a lint-free cloth

prior to insertion.

• It is important that the sample does not contain any

debris. This would corrupt the readings.

• It is possible to take multiple readings in a row, but it

is recommended that a zero reading be taken for each

sample and that the same cuvet is used for zeroing and

measurement.

• It is important to discard the sample immediately after

the reading is taken because the glass might become

permanently stained.

• Shaking the cuvet can generate bubbles in the sample,

causing higher readings. To obtain accurate measure-

ments, remove such bubbles by swirling or by gently

tapping the vial.

• All the reaction times reported in this manual are

referred to 20°C (68°F). As a general rule of thumb,

they should be doubled at 10°C (50°F) and halved at

30°C (86°F).

TIPS FOR AN ACCURATETIPS FOR AN ACCURATE

TIPS FOR AN ACCURATE

MEASUREMENTMEASUREMENT

MEASUREMENT

BATTERY REPLACEMENTBATTERY REPLACEMENT

BATTERY REPLACEMENT

Battery replacement must only take place in a non-hazard-

ous area using a 9V alkaline battery.

Simply slide off the battery cover on the back of the meter.

Detach the battery from the terminals and attach a fresh

9V battery while paying attention to the correct polarity.

Replace the battery and the cover.

SLID

OFF

Recommendations for Users

Before using these products, make sure that they are entirely suitable for the environ-

ment in which they are used.

Operation of these instruments in residential area could cause unacceptable interferences

to radio and TV equipments, requiring the operator to take all necessary steps to correct

interferences.

Any variation introduced by the user to the supplied equipment may degrade the

instruments' EMC performance.

To avoid damages or burns, do not perform any measurement in microwave ovens.

ACCESSORIESACCESSORIES

ACCESSORIES

REAGENT SETS

HI 93718-01 Reagents for 100 tests

HI 93718-03 Reagents for 300 tests

OTHER ACCESSORIES

HI 710009 Blue rubber boot

HI 710010 Orange rubber boot

HI 721310 9V battery (10 pcs)

HI 731318 Tissue for wiping cuvets (4 pcs)

HI 731321 Glass cuvets (4 pcs)

HI 731325 Caps for cuvets (4 pcs)

HI 93703-50 Cuvets cleaning solution (230 mL).

CE DECLARATIONCE DECLARATION

CE DECLARATION

OF CONFORMITYOF CONFORMITY

OF CONFORMITY

IST93718R1 06/98

PRINTED IN PORTUGAL

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