User Manual

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• Remove the cuvette.
• Using the other 1 mL syringe, add to the cuvette exactly 0.5 mL of sample.
Note: Do not mix up the two syringes!
• Replace the cap and invert several times to mix.
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 15 seconds and press Read. When the timer ends the meter will perform the reading.
• The instrument displays the results in mg/L of Magnesium (Mg).
INTERFERENCES
Interferences may be caused by:
Acidity (as CaCO
3
) above 1000 mg/L
Alkalinity (as CaCO
3
) above 1000 mg/L
Calcium (Ca
2+
) above 200 mg/L
Iron must be absent
Aluminum must be absent
Copper must be absent
Magnesium
Magnesium
SPECIFICATIONS
Range 0 to 150 mg/L
Resolution 5 mg/L
Accuracy ±5 mg/L ±3% of reading at 25 °C
Light Source Tungsten lamp with narrow band interference filter @ 466 nm
Method Adaptation of the Calmagite method .
REQUIRED REAGENTS
Code Description Quantity
HI 93752A-0 Mg Magnesium Buffer Reagent 1 mL
HI 93752B-0 Mg Magnesium Indicator Reagent 9 mL
REAGENT SETS
HI 937520-01 Reagents for 50 tests
HI 937520-03 Reagents for 150 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
Note: for sample preparation follow the COLORED OR TURBID SAMPLES
procedure on page 17.
• Select the Magnesium method using the procedure described in the
Method Selection section (see page 12).
• Using one 1 mL syringe add exactly 1.00 mL of HI 93752A-0
Mg Buffer reagent to the cuvette and use the pipette to fill the
cuvette 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 cuvette into the holder and close the lid.
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
MAGNESIUM
0.5 mL
of sample