Hanna-instruments HI 83212 Bedienungsanleitung PDF herunterladen (Seite 10)

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• Remove the cuvette.

• Add 4 drops of HI 93715A-0 First Reagent (6 drops for seawater

analysis). Replace the cap and mix the solution.

• Add 4 drops of HI 93715B-0 Second Reagent (10 drops for seawater

analysis). Replace the cap and mix the solution.

• Reinsert the cuvette into the instrument.

• Press TIMER and the display will show the countdown prior to the

measurement or, alternatively, wait for 3 minutes and 30 seconds and press

READ. When the timer ends the meter will perform the reading. The

instrument displays the results in mg/L of ammonia nitrogen (NH

-N).

• Press the s or t to access the second level of functions.

• Press the Chem Frm functional key to convert the result in mg/L of ammonia (NH

) and ammonium (NH

• Press the s or t to go back to the measurement screen.

INTERFERENCES

Interference may be caused by:

acetone, alcohols, aldehydes, glycine, hardness above 1 g/L, iron, organic chloramines, sulfide, various

aliphatic and aromatic amines.

Ammonia LR

SPECIFICATIONS

Range 0.00 to 3.00 mg/L

Resolution 0.01 mg/L

Accuracy ±0.04 mg/L ±4% of reading

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 93700A-0 First Reagent 4 drops (6 drops for seawater)

HI 93700B-0 Second Reagent 4 drops (10 drops for seawater)

REAGENT SETS

HI 93700-01 Reagents for 100 tests

HI 93700-03 Reagents for 300 tests

For other accessories see page 50.

MEASUREMENT PROCEDURE

• Select the

Ammonia LR

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 ZERO key. The display will show “-0.0-” when the meter is

zeroed and ready for measurement.

AMMONIA LOW RANGE

Ammonia MR

x 4

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 26 27

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