30
2
Take a sample of the water and measure the total
alkalinity. Using the table below, read off the
factor which corresponds nearest to the total
alkalinity
value
measured.
Record
this
Total
Alkalinity Factor (Line 2).
3
Take a sample of the water and measure the pH.
Record the actual pH value (Line 3).
4
Add together the values of lines 1, 2 and 3. This
gives the Palintest Balanced Water Index for the
water. Compare the index obtained with the Water
Balance
Condition
Table
overleaf.
This
table
indicates whether the water is in balance, and if
not, the recommended action to be taken :-
Calcium
Hardness/Alkalinity
as mg/l CaCO
3
Factor
Calcium
Hardness/Alkalinity
as mg/l CaCO
3
Factor
20
1.0
200
2.0
30
1.2
250
2.1
40
1.3
300
2.2
50
1.4
350
2.25
66
1.5
400
2.3
80
1.6
500
2.4
90
1.65
550
2.45
100
1.7
600
2.5
125
1.8
700
2.55
150
1.9
800
2.6
31
5
Calculation:
Line 1 Calcium Hardness Factor
Line 2 + Alkalinity Factor
Line 3 + actual pH
Sum =
Index
Water Balance
Condition
Recommendation
Below 9.6
Highly Corrosive
Increase pH to 7.5 - 7.8.
Increase Calcium Hardness to at
least 50 mg/l.
Increase Total Alkalinity to 100
mg/l or higher as necessary.
Retest Water Balance.
9.6 - 10.5
Corrosive
10.6 - 10.9
Acceptable
Balance
Retest water regularly.
11.0 - 11.2
Ideal Balance
No action required.
11.3 - 11.6
Acceptable
Balance
Retest water regularly.
11.7 - 12.6
Scale Forming
Decrease pH to 7.2 - 7.5.
Decrease Total Alkalinity to 150
mg/l or lower as necessary.
Retest Water Balance.
Above 12.6
Highly Scale
Forming