Hanna Instruments HI 83203 Instruction Manual

Hanna Instruments HI 83203 Instruction Manual Manual pdf 10 page image

18 1910 mlAmmonia LR• Remove the cuvette.• Add 4 drops of HI 93700A-0 First reagent (6 drops for seawateranalysis). Replace the cap and mix the solution.• Add 4 drops of HI 93700B-0 Second reagent (10 drops for seawateranalysis). Replace the cap and mix the solution.• Reinsert the cuvette into the instrument.• Press TIMER and the display will show the countdown prior to themeasurement or, alternatively, wait for 3 minutes and 30 seconds andpress READ. When the timer ends the meter will perform the reading.The instrument displays the results in mg/L of ammonia nitrogen(NH3-N).• Press the V or W to access the second level of functions.• Press the Chem Frm functional key to convert the result in mg/L of ammonia (NH3) and ammonium (NH4+).• Press the V or W to go back to the measurement screen.INTERFERENCESInterference may be caused by: acetone, alcohols, aldehydes, glycine, hardness above 1 g/L, iron, organicchloramines, sulfide, various aliphatic and aromatic amines.x 4x 4Ammonia LRSPECIFICATIONSRange 0.00 to 3.00 mg/LResolution 0.01 mg/LAccuracy ±0.04 mg/L ±4% of readingTypical EMC ±0.01 mg/LDeviationLight Source Tungsten lamp with narrow band interference filter @ 420 nmMethod Adaptation of theASTM Manual of Water and Environmental Technology, D1426-92,Nessler method. The reaction between ammonia and reagents causes a yellow tint inthe sample.REQUIRED REAGENTSCode Description QuantityHI 93700A-0 First Reagent 4 drops (6 drops for seawater)HI 93700B-0 Second Reagent 4 drops (10 drops for seawater)REAGENT SETSHI 93700-01 Reagents for 100 testsHI 93700-03 Reagents for 300 testsFor other accessories see page 46.MEASUREMENT PROCEDURE• Select theAmmonia LR method using the procedure described in theMethod Selection section (see page 11).• 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 iszeroed and ready for measurement.AMMONIA LOW RANGE