G A S T R O N O M I E M Ü H L E N | H O R E C A G R I N D E R
12
8. Calibration of The Dosing Units
As stated in the overview on page 10, the FCG 2.0 has been cali-
brated to grind to a coffee-to-water-ratio of 55g/l at a given grind
speed of appr. 5.5 g/s.
Depending on:
•
the origin of the coffee,
•
the type of coffee (arabica, robusta, etc. ),
•
the size of beans,
•
the blend,
•
the degree of roasting,
•
the cooling method after roasting (i.e. moisture content of
the bean),
•
the age of the roasted coffee,
•
the cleaning status of the grinder,
•
other external influences (humidity, temperature, etc.)
•
and most importantly: the adjusted grind size
the grind speed of the FCG 2.0 can vary quite drastically (5g/s up
to 8g/s).
Subsequently the dosed amount e.g. per cup of an individual
coffee at its best grind size does not match the aimed-for 55g/l.
The actual grind speed of the FCG 2.0 for the chosen coffee has
to be adjusted in the software to ensure the perfect coffee-to-
water-ratio.
8.1 Grind a preset amount of coffee
With coffee in the hopper place a tared cup under the spout and
press the START-button (pos.8) for 6 seconds. The grinder will
start grinding for exactly 10 seconds. The display will show CA for
“calibration”.
Weigh the ground coffee.
8.2 Enter the correct amount of coffee
The display will show a number (factory setting 55). Using the
+/-buttons enter the correct weight of the coffee that has been
ground in 10 seconds.
The software will automatically adjust the grind times to match
the perfect coffee-to-water-ratio of 55g/l.
8.3 Quit the calibration mode
To leave the calibration mode press the START-button (pos.8) for
6 seconds.
8.4 Changing the coffee-to-water-ratio (g/l)
In order to change the factory setting of 55g/l (SCAE Gold Cup
Standard) use the following formulae to calculate the value that
has to be typed into the grinder (see 8.2).
Value to enter in
calibration mode
(see 8.2)
(
)
weight of coffee
(gram) ground in
10s (see 8.1)
=
wanted coffee-
to-water-ratio
(g/l)
-
55
