User Guide
8
HI 93710
pH/Chlorine
ON
OFF
HI 93711-0 Total Cl
2
DPD 1 packet
Liquid version (chlorine):
Code Unit Description Quantity
HI 93701A-F Free Cl
2
DPD1 indicator 3 drops
HI 93701B-F Free Cl
2
DPD1 buffer 3 drops
HI 93701A-T Total Cl
2
DPD1 indicator 3 drops
HI 93701B-T Total Cl
2
DPD1 buffer 3 drops
HI 93701C-T Total Cl
2
DPD3 solution 1 drop
REAGENT SETS
HI 93701-01 Reagents for 100 free chlorine tests
HI 93701-03 Reagents for 300 free chlorine tests
HI 93710-01 Reagents for 100 pH tests
HI 93710-03 Reagents for 300 pH tests
HI 93711-01 Reagents for 100 total chlorine tests
HI 93711-03 Reagents for 300 total chlorine tests
HI 93701-F Reagents for 300 free chlorine tests (liquid version)
HI 93701-T Reagents for 300 total chlorine tests (liquid version)
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• The meter will automatically default to pH mea-
surement mode.
• When the LCD displays “- - -”, it is ready.
pH MEASUREMENTS
In order to perform pH measurements, follow the procedure on
page 46.
CHLORINE MEASUREMENTS
• Press the pH/CL range key to select the chlorine scale. “C” will
appear on the LCD.
• Follow the procedures on page 34 and 36.
Note: Free and total chlorine have to be measured separately
following the indicated procedure with fresh unreacted samples
if both values are requested.
pH
45
• Fill a cuvet with 10 mL of the reacted
sample up to the mark and replace the
cap. This is the sample.
• Insert the sample into the instrument.
• Wait for 3 minutes and then press READ. "SIP" will appear
during measurement.
• The instrument directly displays concentration in µg/L of iron on
the Liquid Crystal Display.
NoteNote
NoteNote
Note: For better accuracy wash glassware with HCl 6N.
INTERFERENCES
Interference may be caused by:
Cadmium above 4.0 mg/L
Chromium
3+
above 0.25 mg/L
Chromium
6+
above 1.2 mg/L
Cobalt above 0.05 mg/L
Copper above 0.6 mg/L
Cyanide above 2.8 mg/L
Manganese above 50.0 mg/L
Mercury above 0.4 mg/L
Molybdenum above 4.0 mg/L
Nickel above 1.0 mg/L
Nitrite ion above 0.8 mg/L
Sample pH should be between 3 and 4 to avoid developed color to
fade or turbidity.
Iron LR
10 mL