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.