Concordia 2500i, Руководство техника

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3025-008A
Section 8: The Brew Group
Viewing left piston movement in TEST ROUTINES
1. Enter the programming menu and access the main menu
category: TEST ROUTINES
2. Scroll to the submenu category: LEFT DRIVE
3. Under normal operating conditions, piston location should
display approx 362-363
4. Use the increase/decrease value arrows to move piston
5. As piston moves, the piston location number will change
6. As the piston magnet move across the Hall-Effect Sensor, an
“L” will appear on the display and the sensor LED will
illuminate
Quick Tip
Group Initialization
Each time the Concordia Model 2500
S/i
is turned on, the brew group
runs through 22 different steps to perform a self-calibration. The CPU
monitors the coffee piston movement from the base of the brew
chamber to the base of the brew piston.
As the CPU monitors the piston movement based on the rotational Hall-
Effect Sensors and locates the fixed Hall-Effect Sensors, the CPU’s
piston positions are reset.
Upon completion of the group initialization, the pistons move to their
home position.
During operation, the pistons move past the fixed sensors and the
CPU’s piston positions are reset.
Measuring Coffee Powder Dose
The CPU monitors the coffee powder dose using information obtained
from the Hall-Effect Sensors.
Once the beans are ground and delivered into the brew chamber, the
upper piston lowers into the brew chamber to seal it. The lower piston
moves up in the chamber to pack the ground coffee against the upper
piston. The lower piston moves until it is stopped by the presence of
the coffee in the chamber.
As the pistons move, the CPU monitors the number of motor rotations
necessary to pack the ground coffee. The CPU is programmed to relate
“X” number of rotations with ground coffee volume.
With each new extraction, the CPU automatically increases or
decreases the grind time of the next coffee powder dose based on the
amount of coffee detected during the previous extraction.
The GRIND ADJUST arrows provide a visual display of the CPU
monitoring the coffee powder dose. The direction of the arrow
Concordia 2500s/i Technical Support Manual 8-5
2900-233