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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 93735
A-HR
Hardness Indicator reagent HR 9.5 mL
HI 93735
B
-0
Hardness Buffer reagent
2 drops
HI 93735
C
-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