Hanna-instruments HI 96719 Manuel d'utilisateur télécharger pdf (Page 13)

13

• When the beeper sounds briefly and the

LCD displays dashes, the meter is ready.

The blinking “ZERO” indicates that the

instrument needs to be zeroed first.

• Fill a graduated beaker with 50 mL of

sample.

• Add 0.5 mL of HI 93719A-0 Magnesium

indicator solution, then swirl to mix.

• In the same beaker add 0.5 mL of HI

93719B-0 Alkali solution for

Magnesium, then swirl to mix.

• Fill two cuvettes with 10 mL of sample

each.

• Add 1 drop of HI 93719C-0 EDTA solution

to one cuvette, replace the cap and swirl

the solution. This is the blank.

• Add 1 drop of HI 93719D-0 EGTA solution

to the second cuvette, replace the cap

and swirl the solution. This is the sample.

• Place the blank into the cuvette holder

and ensure that the notch on the cap is

positioned securely into the groove.

• Press ZERO/CFM and the lamp, cuvette

and detector icons will appear on the

display, depending on the measurement

phase.

• After a few seconds, the display will

show “-0.0-”. The meter is now zeroed

and ready for measurement.

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