User Manual

24 25
Ammonia MR
SPECIFICATIONS
Range 0.00 to 10.00 mg/L
Resolution 0.01 mg/L
Accuracy ±0.05 mg/L ±5% of reading at 25 °C
Typical EMC ±0.01 mg/L
Deviation
Light Source Tungsten lamp with narrow band interference filter @ 420 nm
Method Adaptation of the ASTM Manual of Water and Environmental Technology, D1426-92 ,
Nessler method. The reaction between ammonia and reagents causes a yellow tint in
the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93715A-0 First Reagent 4 drops (6 drops for seawater)
HI 93715B-0 Second Reagent 4 drops (10 drops for seawater)
REAGENT SETS
HI 93715-01 Reagents for 100 tests
HI 93715-03 Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the Ammonia MR method using the procedure described in
the Method Selection section (see page 12).
• 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.
AMMONIA MEDIUM RANGE
Alkalinity
10 mL
• Remove the cuvette.
Note: Any chlorine present in the sample will interfere with the
reading. To remove the chlorine interference add one drop
of HI 93755-53 Chlorine Remover to the unreacted sample
• 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.