Hanna Instruments HI 83214 - Manual (Page 24)

24
CHLORINE, FREE
Chlorine, Free
10 mL
SPECIFICATIONS
Range 0.00 to 5.00 mg/L Cl
2
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L or ±4 % of reading @ 25 °C, whichever is greater
Light Source Tungsten lamp with narrow band interference filter @ 525 nm
Method Adaptation of the EPA method 330.5 and Standard Methods for the Examination of
Water and Wastewater, 20 th edition, 4500-Cl G, DPD method. The reaction between
free chlorine and the DPD reagent causes a pink tint in the sample.
REQUIRED REAGENTS
Code Description Q.ty/test
HI 93701-0 DPD Powder Reagent 1 packet
REAGENT SETS
HI 93701-01 Reagents for 100 tests
HI 93701-03 Reagents for 300 tests
For other accessories see page 68.
MEASUREMENT PROCEDURE
• Select Chlorine, Free method following one of the procedures described in the “Method Selection”
section (see page 15).
• Take an empty vial.
• Fill the vial with 10 mL of unreacted sample, then replace the cap. This is the blank.
• Place the vial into the holder and push it completely down.
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.