Hanna Instruments HI 83214 Instruction Manual

49SPECIFICATIONSRange 0.00 to 1.60 mg/L PResolution 0.01 mg/LAccuracy ±0.05 mg/L or ±5 % of reading @ 25 °C, whichever is greaterLight Source Tungsten lamp with narrow band interference filter @ 610 nmMethod Adaptation of the EPA method 365.2 andStandard Methods for the Examination ofWater and Wastewater, 20th edition, 4500-P E, ascorbic acid method. The reactionbetween orthophosphate and the reagent causes a blue tint in the sample.REQUIRED REAGENTSCode Description Q.ty/test Q.ty/setHI 93758A-0* Reagent Vial 1 vial 50 vialsHI 93758-0 Phosphorus Reagent 1 packet 50 packets*Reagent Vial identification: P R, red label.REAGENT SETHI 93758A-50 Reagents for 50 testsFor other accessories see page 68.MEASUREMENT PROCEDURE• Select thePhosphorus, Reactive method following one of the procedures described in the “MethodSelection” section (see page 15).• Remove the cap from a Reagent Vial.• Add exactly 5.0 mL of sample to the vial, while keeping thevial at a 45-degree angle.• Replace the cap and mix by inverting the vial a couple oftimes. This is the blank.• Place the vial into the holder and push it completely down.• Press the Zero key. The instrument will perform a zero sequenceand after a few seconds the display will show “-0.0-”. Now themeter is zeroed and ready for measurement.• Remove the vial.PHOSPHORUS, REACTIVEPhosphorus, Reactive