Quooker Scale Control Plus Manual page 8

C
Hardness testing
– Test your water hardness with the Total Hardness Test Kit as described below, to determine
– Ensure the Scale Control Plus is working optimally by comparing the water hardness of the
1
30
ml
25
20
15
10
5
3
30
ml
25
20
15
10
5
+ + ... = °dH
the expected cartridge lifespan.
cold mains water to the hardness of the Quooker boiling water (allow the water to cool before
testing). The second value should be lower.
2
30
ml
25
20
15
10
5
1. Filling test tube
Take the test tube out of its box. Take
a sample of water from the mains cold
water feed. Rinse out the test bottle with
this sample water then fill to the 5 ml
mark.
2. Adding reagent
Slowly add the reagent drop by drop, all
the while swirling gently to mix the water.
Count the number of drops it takes to
turn the red colour of the solution to
green.
3. Determining water hardness
One drop of the reagent is the equivalent
to 1.0°dH (degree of hardness) – For
example, if it takes 9 drops for the sample
to turn to green, this means your water
has a water hardness of 9° dH.