Hanna Instruments HI 83216 User Manual
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Total Chlorine
TOTAL CHLORINE
SPECIFICATIONS
Range
0.00 to 5.00 mg/L
Resolution
0.01 mg/L from 0.00 to 2.50 mg/L;
0.10 mg/L above 2.50 mg/L
Accuracy
±0.03 mg/L ±3% of reading at 25 °C
Typical EMC
±0.01 mg/L
Deviation
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. The reaction between chlorine and the
DPD reagent causes a pink tint in the sample.
REQUIRED REAGENTS
POWDER:
Code
Description
Quantity
HI 93711-0
DPD Powder Reagent 1 packet
REAGENT SETS
HI 93711-01 Reagents for 100 tests
HI 93711-03 Reagents for 300 tests
For other accessories see page 34.
MEASUREMENT PROCEDURE
• Select the
Total Chlorine method using the procedure described in the Method Selection section (see page 15).
• 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 the
Zero key. The meter will show “-0.0-” when the meter is zeroed and ready for measurement.
• Remove the cuvette.
• Add the content of one packet of HI 93701-0 DPD reagent.
Replace the cap and shake gently for 20 seconds.
• Reinsert the cuvette into the instrument.
• Press
Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 1 minute and press
Read. When the timer ends the meter will perform the reading. The instrument
displays the results in
mg/L of free chlorine.
Free Chlorine
INTERFERENCES
Interference may be caused by: Bromine, Chlorine Dioxide, Iodine, Ozone (all these interferences give positive
errors).
Alkalinity above 250 mg/L CaCO
3
will not reliably develop the full amount of color or it may rapidly fade.
To resolve this, neutralize the sample with diluted HCl.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake the sample for approximately
2 minutes after adding the powder reagent.
10 mL