Hanna Instruments HI 93752 User Manual

Page 2

MEASUREMENT PROCEDURE TO

DETERMINE CALCIUM

• Turn the meter on by pressing ON/OFF.

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

ready.

• Select Calcium by press-

ing Ca/Mg. A "c" will

appear on the right cor-

ner of the display.

• Using the 5 mL syringe add exactly

3.00 mL of sample to the cuvet.

• Add 4

drops of

B u f f e r

Reagent.

• Use the pipette to fill the cuvet up to

the 10 mL mark with the HI 93752A-0

Ca reagent.

• Replace the cap

and invert several

times to mix.

• 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 display

will show "-0.0-". Now the meter is ze-

roed and ready for measurement.

• Remove the cuvet.

• Using the 1 mL syringe,

add exactly 1 mL of the HI

93752B-0 Ca Oxalate re-

agent. Replace the cap and

invert the cuvet 10 times

to mix.

• Wait for 5 minutes, then invert again the cuvet 10

times and after that reinsert the cuvet into the instru-

ment.

• Wait for 10 seconds, press

READ and SIP will ap-

pear on the display.

• The instrument directly displays concentration in mg/L of

Calcium on the Liquid Crystal Display.

Note: To ensure accurate results, perform the tests at room

temperature, between 18°C and 28°C (65F to 83F).

Interferences:

concentration

reading

Acidity (as CaCO

)

above 1000 mg/L lower

Alkalinity (as CaCO

)

above 1000 mg/L higher

Magnesium (Mg

)

above 400 mg/L higher

MEASUREMENT PROCEDURE TO

DETERMINE MAGNESIUM

• Select Magnesium by pressing Ca/Mg. An

"m" will appear on the right corner of the

display.

• Using one 1 mL sy-

ringe add exactly 1.00

mL of HI 93752A-0

Mg Buffer reagent to

the cuvet and use the

pipette to fill the cuvet

up to the 10 mL mark

with the HI 93752B-0

Mg Indicator reagent.

• Replace the cap and

invert several times to

mix.

• 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 display

will show "-0.0-". Now the meter is ze-

roed and ready for measurement.

• Remove the cuvet.
• Using the other 1 mL syringe, add to the

cuvet exactly 0.5 mL of sample.

Note: Do not mix up the two syringes!

1 mL

0.5 mL

of sample

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 affected.

• 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

TIPS FOR AN ACCURATE

MEASUREMENT

would corrupt the readings.

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

mended 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 measurements, 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).

Recommendations for
Users
Before using these prod-
ucts, make sure that they
are entirely suitable for
the environment in which
they are used.
Operation of these in-
struments in residential
area could cause unac-
ceptable 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 sup-
plied equipment may degrade the instruments' EMC performance.
To avoid damages or burns, do not perform any measurement in microwave ovens.

ACCESSORIES

REAGENT SETS
HI 93752-01 Reagents for 100 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 740142

1 mL graduated syringe

HI 740143

1 mL graduated syringes (6 pcs)

HI 740144

Pipette tip (6 pcs)

HI 740157

Plastic refilling pipette (20 pcs)

HI 93703-50 Cuvets cleaning solution (230 mL)
C115-00300 5 mL graduated syringe

CE DECLARATION

OF CONFORMITY

IST93752

11/99

PRINTED IN PORTUGAL

3 mL

of sample

1 mL

• Replace the cap and

invert several times to

mix. Wait for 15 sec-

onds.

• Reinsert the cuvet into the instru-

ment.

• Press READ and SIP will

appear on the display.

• The instrument directly displays concentration in mg/L of

Magnesium on the Liquid Crystal Display.

Interferences:

concentration

reading

Acidity (as CaCO

) above 1000 mg/L

lower

Alkalinity (as CaCO

) above 1000 mg/L

higher

Calcium (Ca

)

above 200 mg/L

higher

Iron

higher

Aluminum

higher

Copper

higher

FOR BEST RESULTS BOTH FOR CALCIUM AND MAGNE-

SIUM DETERMINATION:

Intensely colored samples will cause interference, therefore

they should be adequately treated before performing the

test. Suspended matter in large amounts should be re-

moved by prior filtration.
ACCESSORIES FOR CALCIUM AND MAGNESIUM
• 1 syringe (5 mL) with tip
• 3 syringes (1 mL) with tips
• 2 plastic pipettes

probable
level of liquid
taken up by
syringe

ZERO

OPERATIONAL GUIDE

OFF

10 mL