Hanna Instruments HI 83203 Instruction Manual

Hanna Instruments HI 83203 Instruction Manual Manual pdf 17 page image

32 33 Nitrite HR• Reinsert the cuvette into the instrument.• Press TIMER and the display will show the countdown priorto the measurement or, alternatively, wait for 10 minutesand press READ. When the timer ends the meter willperform the reading. The instrument displays concentrationin mg/L of nitrite.• 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 nitrogen-nitrite (NO2–-N) and sodiumnitrite (NaNO2).• Press the V or W to go back to the measurement screen.Nitrite HRNITRITE HIGH RANGESPECIFICATIONSRange 0 to 150 mg/LResolution 1 mg/LAccuracy ±4 mg/L ±4% of readingTypical EMC ±1 mg/LDeviationLight Source Tungsten lamp with narrow band interference filter @ 575 nmMethod Adaptation of the Ferrous Sulfate method. The reaction between nitrite and thereagent causes a greenish-brown tint in the sample.REQUIRED REAGENTSCode Description QuantityHI 93708-0 Powder reagent 1 packetREAGENT SETSHI 93708-01 Reagents for 100 testsHI 93708-03 Reagents for 300 testsFor other accessories see page 46.MEASUREMENT PROCEDURE• Select theNitrite HR method using the procedure describedin theMethod Selection section (see page 11).• Fill the cuvette up to the mark with 10 mL of unreactedsample and replace the cap.• Place the cuvette into the holder and close the lid.• Press ZERO key. The display will show “-0.0-” when themeter is zeroed and ready for measurement.• Remove the cuvette.• Add the content of one packet of HI 93708-0 reagent.Replace the cap and shake gently until completely dissolved.10 mL