Hanna Instruments HI 83266 - Manual (Page 11)

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SPECIFICATIONS
Range 0 to 500 mg/L (as CaCO
3
)
Resolution 5 mg/L
Accuracy ±5 mg/L ±10% of reading at 25 °C
Typical EMC ±5 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 575 nm
Method Colorimetric Method . At different alkalinity levels a distinctive range of colors from yellow
to green and greenish blue will develop.
REQUIRED REAGENTS
Code Description Quantity/test
HI 93755-0 Alkalinity Indicator Reagent 1 mL
REAGENT SETS
HI 93755-01 Reagents for 100 tests
HI 93755-03 Reagents for 300 tests
For other accessories see page 46.
MEASUREMENT PROCEDURE
• Select the Alkalinity method using the procedure described in the
Method Selection section (see page 15).
• Fill the cuvette with 10 mL of unreacted sample, up to the mark,
and replace the cap.
• 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.
ALKALINITY
Alkalinity
10 mL
• Remove the cuvette.
• Carefully add exactly 1 mL of HI 93755-0 Liquid Alkalinity
Reagent using the supplied syringe.
• Replace the cap and invert 5 times.
• Reinsert the cuvette into the instrument and close the lid.
• Press Read to start the reading.
• The instrument displays the results in mg/L of alkalinity (CaCO
3
).
Note: If using a meter with software version 1.14 or earlier, readings can be improved for samples
with less than 75 ppm alkalinity by adding 0.7 mL of reagent instead of 1.0 mL.