LaMotte HARDNESS TEST KIT 4824-DR-LT - Manual (Page 2)

TOTAL HARDNESS TEST PROCEDURE
If the plunger reaches the bottom line on the scale
(200 ppm) before the endpoint color change occurs, refill
Read the test
result directly
from the scale
where the large
ring on the
Titrator meets the
Titrator barrel.
Record as ppm
Total Hardness as
(CaCO ).
3
7.
NOTE:
the Titrator and continue the titration. When recording the test result,
be sure to include the value of the original amount of reagent dispensed
(200 ppm).
Parts per million CaCO may be converted to grains per gallon (gpg)
3
CaCO :
3
gpg CaCO = ppm CaCO x 0.058
3 3
EXAMPLE:
Plunger tip is
2 minor divisions
below line 80.
Test result is:
80 + (2 divisions x 4)
= 88 ppm.
80
100
Result:
88 ppm
120
2.
5.
Fill
Direct Reading
Titrator (0382)
with Hardness
Reagent #7
(4487DR).
Insert the
Titrator into
the center
hole of the
test tube cap.
1. 3.
4.
tube, slowly press
the plunger to
titrate until the
red color changes
to clear blue.
Add 5 drops
of *Hardness
Reagent #5
(4483).
Swirl to mix.
Add one Hardness
Reagent #6 Tablet
(4484). Cap and swirl
Fill a test
tube (0608)
to the 12.9
mL line with
the sample
water.
until tablet disintegrates.
Solution will turn red if
hardness is present.
If solution is blue,
there is no
measurable
amount of
hardness.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
While gently
swirling the
6.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0