Douwe Egberts Contenta - Coffee Ratio and Strength Adjustment

Programming -7
Version 1.36
02/2004
F. Coffee ratio setting
The coffee strength is determined by the mix of coffee concentrate and water. This mix is formulated as a
ratio of 1 (volume) part of coffee versus a given number of water parts. (e.g. : ratio 1:20 indicates that the
coffee itself is composed of 1 part coffee concentrate and 20 parts of water.)
When the coffee is made stronger the number of pulses needed to produce a certain coffee strength is
increased. First the machine calculates the time during which coffee can be dosed (based on the parameters of
valve flow and cup volume) and thereafter the actual number of pulses.
This implies that the coffee becomes stronger when the relative number of water parts decreases. Ratio 1:19
produces therefore stronger coffee than ratio 1:20.
Ratio 1 : 20
> Checking the current ratio
Push the stop button and the pot of coffee to check the ratio setting.
If the Replace coffee pack and Refill water tank [Check water supply] LED’s on the operation panel
light up simultaneously, the dispenser is set to the default setting (1:20).
The coffee is stronger than default when the Refill water tank [Check water supply] LED of the
operation panel is blinking and the coffee is less strong when the Replace coffee pack LED is blinking.
Count the number of times that the LED is actually blinking and add (in case of the Replace coffee pack
LED) or substract (in case of the Refill water tank [Check water supply] LED) this from the default value
(1:20) to determine the actual ratio.
E.g., if the Refill watertank [Check water supply] LED blinks 3 times (coffee is stronger), substract 3
from 20 to obtain the ratio value. (=1:17)
> Adjusting the coffee strength
To increase coffee strength: keep the stop button pressed, press the cup of coffee button, wait for the
Refill watertank [Check water supply] LED to light up and proceed.
Coffee concentrate
parts
Water
parts
ratio = 1:16 1:17 1:18 1:19 1:20 1:21 1:22 1:23 1:24
Water part decreases =
coffee becomes stronger
Water part increases =
coffee becomes less strong
To decrease coffee strength: keep the stop button pressed, and press the hot water button, wait for the
Replace coffee pack LED to light up and proceed.
REPLACE COFFEE PACK
REFILL WATERTANK
WARMING UP, PLEASE WAIT
stop
COFFEEHOT WATER
1:10 1:50
REPLACE COFFEE PACK
REFILL WATERTANK
WARMING UP, PLEASE WAIT
stop
COFFEEHOT WATER
For US: REFILL WATERTANK = CHECK WATER SUPPLY
For US: REFILL WATERTANK = CHECK WATER SUPPLY