Concordia XPRESS - Hall-Effect Sensors

3033-006B Section 6: The Coffee System
Concordia Xpress Technical Support Manual 6-11
2900-300B
Hall-Effect Sensors
Operating Voltage: 5Vdc
Hall-Effect sensors monitor the position of the pistons.
The brew group utilizes two Hall-Effect sensor circuits to monitor the
position of the left and right pistons. When a magnet passes near the
sensor, the circuit opens.
The two fixed Hall-Effect sensors are mounted to the body of the brew
group, with a magnet mounted on each piston. As the piston moves and
the magnet passes in front of the Hall-Effect sensor, the circuit opens.
The CPU uses this open circuit to verify the location of the piston.
As the piston magnet moves across the Hall-Effect sensor, the sensor
LED will illuminate.
For proper function, the gap between the Hall-Effect sensor and the
magnet must be a minimum of 1mm (.04”) and a maximum of 2mm
(.089”). For reference, a credit card is approximately 1.5mm.
Right Brew Piston
Left Coffee Piston
Fixed Hall Effect Sensor
Magnet Passes by Sensor
As piston moves up
Fixed Hall
Effect Sensor
Brew Chamber
Magnet Passes by Sensor
As piston moves up