Operation
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Fill the test tube up to the marking °f (x 0.1 = mol/m³) in order to determine the
water hardness in °f, mol/m³ or mmol/l.
6.6.2
Determining the water hardness in °dH/°f
1.
Add one drop of titration solution (1 drop = 1 °dH = 1 °f).
2.
Shake the test tube until the titration solution is mixed with the water.
3.
In case of red colouring, repeat steps 1 and 2 and count the drops until the colour
changes to green.
» If the colour changes from red to green, the water hardness has been determined.
The number of drops corresponds to the degree of hardness in °dH or °f.
Example:
•
Test tube filled up to the °dH mark: 6 drops = 6 °dH
•
Test tube filled up to the °f mark: 6 drops = 6 °f
6.6.3
Determining the water hardness in mol/m³ (mmol/l)
1.
Determine the water hardness in °f as described.
2.
Divide the value in °f by 10.
The water hardness in °f divided by 10 corresponds to the degree of
hardness in mol/m³ (= mmol/l).
Example:
•
6 drops = 6 °f = 0.6 mol/m³ = 0.6 mmol/l
» You get the water hardness in mol/m³.
6.6.4
Entering the water hardness
Menu level>Water hardness
1.
Press and hold
for 2 seconds.
2.
Touch the raw water hardness.
3.
Enter the value of the raw water hardness.
4.
Confirm with
✔
.
The maximum soft water hardness that can be set is approx. 50 % of the raw
water hardness present.
