22
ods for the Examination of Water and Waste-
water, 18
th
edition, Calmagite/colorimetric
method. The reaction between hardness and
reagents causes a maroon tint in the sample.
REQUIRED REAGENTS
Code Unit Description Quantity
HI 93710-0 pH Phenol red 5 drops
HI 93746-0 Iron LR TPTZ Reagent 2 packets
HI 93719A-0 Hardness Ca & Mg indicator 0.5 mL
HI 93719B-0 Hardness Alkali solution 0.5 mL
HI 93719C-0 Hardness EDTA solution 1 drop
HI 93719D-0 Hardness EGTA solution 1 drop
REAGENT SETS
HI 93710-01 Reagents for 100 pH tests
HI 93710-03 Reagents for 300 pH tests
HI 93746-01Reagents for iron LR (100 packets)
HI 93746-03Reagents for iron LR (300 packets)
HI 93719-01Reagents for 100 hardness tests
HI 93719-03Reagents for 300 hardness tests
For other accessories see page 48.
MEASUREMENT PROCEDURES
• Turn the meter on by pressing ON/OFF.
• When the LCD displays "- - - -" keep SET pressed until the desired
parameter is displayed.
• Release the key and when the LCD displays
"- - -", it is ready.
• Refer to the manual pages below to measure the appropriate
parameter and for the required reagents:
pH MEASUREMENT
• "PH" will appear on the LCD; then see
page 46.
LOW RANGE IRON MEASUREMENT
• "FE" will appear on the LCD; then see
page 44.
HARDNESS MEASUREMENT
• "Hrd" will appear on the LCD; then see
page 39.
HI 93744
Hardness/Iron LR/pH
ON
OFF
SET
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