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TOTAL HARDNESS HIGH RANGE TOTAL HARDNESS HIGH RANGE
TOTAL HARDNESS HIGH RANGE TOTAL HARDNESS HIGH RANGE
TOTAL HARDNESS HIGH RANGE
SPECIFICATIONS
Range 400 to 750 mg/L
Resolution 5 mg/L
Accuracy ±10 mg/L ±2% of reading
Typical EMC ±5 mg/L
Deviation
Light Source Tungsten lamp with narrow band interference
filter @ 466 nm
Method Adaptation of the EPA method 130.1. The reac-
tion between calcium, magnesium and reagents
causes a red-violet tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93735A-HR Hardness Indicator reagent HR 9.5 mL
HI 93735B-0 Hardness Buffer reagent 2 drops
HI 93735C-0 Fixing reagent 1 packet
REAGENT SETS
HI 93735-02 Reagents for 100 tests High Range
(400 to 750 mg/L)
HI 93735-0 Reagents for 100 tests (0 to 750 mg/L)
For other accessories see page 141.
MEASUREMENT PROCEDURE
• Select the program number corresponding to Total Hardness HR
on the secondary LCD by pressing PROGRAM W and V.
• Using the syringe, add exactly 0.5 mL of
unreacted sample to the cuvet.
• With the plastic pipette fill the cuvet
up to the 10 mL mark adding HI
93735A-HR Indicator reagent.
Total Hardness HR
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