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BASCA - EN
Version 06 01.2010
Water quality
General
A cup of coffee is 99 % water! Water has a big influence on both the taste of your coffee and the durability
of your coffee machine. To protect your coffee machine from damage it is important to follow the instruc-
tions given in this chapter.
Paying careful attention to the following recommendations will lead to improved beverage quality and will
extend the durability of your coffee machine.
Purity of water
Water flows over stones, gravel and underground absorbing many important minerals. The origin, the rock
and earth attributes as well as the regional treatment methods affect the characteristics and taste of the
water.
To prepare coffee products the pH-value has a big influence: acidic water brings out the sour notes of cof-
fee. When using fully softened water the “crema” won’t last long when preparing coffee products. Not all
parts in the machine are resistant against acidic water and will corrode.
When the water is too hard, lime scale can build up in the coffee machine (in boilers and valves for in-
stance). The performance and durability of the coffee machine will decrease.
Water characteristics for Schaerer coffee machines
• 4 – 6°dKH (German degrees Carbonate hardness) or 7 – 8°dTH (German degrees Total hardness).
When the test result is lower then the indicated range the water must be enriched with minerals.•
When the test result is higher then the indicated range the water must be descaled (with suitable by-•
pass to ensure that the pH exceeds 5.5).
Chlorine content max. • 100 mg per litre
PH value 6.5 – 7 • (ph neutral )
Non-observance of these values means there is no Schaerer Ltd. warranty / liability!
Conversion table
Unit ° dH ° eH ° fH ppm mmol/l
German hardness 1 ° dH 1 1.253 1.78 17.8 0.1783
English hardness 1 ° eH 0.798 1 1.43 14.3 0.142
French hardness 1 ° fH 0.560 0.702 1 10 0.1
CaCO
3
(USA) 1 ppm 0.056 0.07 0.1 1 0.01
mmol/l 1 mmol/l 5.6 7.02 10 100 1
Depending on the scale of the measuring tool the value must be converted using the table right!
Filtration
Filtration units are essential to achieve an optimal coffee quality and for maintenance and hygiene reasons.
Water is a living substance: the values do not remain constant. Regardless of the type of filtration used
these values must be measured every year and the filter must be changed and adjusted.
Für weitere Informationen wenden Sie sich bitte an den Vertriebs- und Servicepartner in Ihrer Nähe!
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