LaMotte AT Visual Series Water Softener Demo Kit - Manual (Page 10)

10
Total Hardness
Total Hardness of a water supply generally represents the total concentration of Calcium and Magnesium ions
expressed as Calcium Carbonate (CaCO
3
). Other ions may contribute, however, they are usually present in
insignifi cant quantities. Hard waters may form scale on plumbing fi xtures, consume excessive quantities of
soap, and leave deposits of fi lm on glassware, fabrics, etc. Excessive hardness may be removed by various
treatment methods.
*WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a
Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy,
contact LaMotte by e-mail, phone or fax.
TEST PROCEDURE
10
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20
10
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20
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20
10
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20
10
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1
20
Thoroughly rinse
the
sample tube
(4488) with the
water to
be tested. Fill the sample
tube (4488)
to the desired
line** with the
sample water.
Add 5 drops
of *Hardness
Reagent #5
(4483).
Swirl to mix.
Add either
1 Hardness
Reagent #6
Tablet (4484)
or 5 drops of
*Hardness
Reagent #6
(4485).
Swirl to mix.
Counting the
number of drops
and swirling
between drops, add
Hardness Reagent #7
(4487WT) one drop
at a time until the red
color changes to clear
blue.
Multiply the number of drops used in Step 7 as follows:
Tube fi lled to upper line: each drop equals 10 ppm Hardness as CaCO
3
Tube fi lled to middle line: each drop equals 1 gpg Hardness as CaCO
3
Tube fi lled to lower line: each drop equals 20 ppm Hardness as CaCO
3
** When the tube is fi lled to upper line. Each drop of Hardness Reagent #7 is equal to 10 ppm.
When the tube is fi lled to middle line. Each drop of Hardness Reagent #7 is equal to 1gpg.
When the hardness level is over 200 ppm, fi ll to lower line. Each drop of Hardness Reagent #7 is equal to 20 ppm.
1. 2. 3.
4. 5. 6.
7. 8.