43
Replacing the pressure sensor
Replacing the pressure sensor
Fig. 54
Pressure sensor
Functional principle
The pressure sensor is adjusted to the mechanical and electrical
properties of the pump with a calibration procedure. The calibra-
tion requires a test station from KNAUER and the service software.
For better results, the calibration is repeated once.
Prerequisite
The power plug has been pulled.
The housing has been opened.
The test station for the pump with pressure sensor is available.
The service software for the calibration of the pressure sensor
is available.
Practical tip
Access to the pressure sensor is easier if the motherboard has
been removed beforehand.
Procedure
Loosen the capillaries.
Detach the cabling of the pressure sensor on the mother-
board.
Unscrew the screws of the pressure sensor (A) in the interior of
the device.
Insert the new pressure sensor.
Calibrate the new pressure sensor.
Note:
Repair of the pressure sensor requires special tools and
knowledge. For this reason, the entire pressure sensor is
replaced by the technical service department.
Legend
A Pressure sensor
B Capillary screw fit-
ting
C Ventilation screw
A
B
C
