44
Replacing the pressure sensor
Calibrating the
pressure sensor
The pressure sensor is calibrated at the following values:
HPLC pumps
at 0 bar (at calibration zero point)
in the range of 350–400 bar (end point of the calibration)
Tools
Allen wrench for hexagon socket screws (Allen screws), 3.0 mm
diameter
Duration
About 10 minutes
Level of difficulty
Level 4 (from 1 to 7, very easy to very difficult)
Removing the pressure
sensor
The pressure sensor is secured with two screws on the inside of
the housing of the pump.
Installing a new pressure
sensor
1. Guide the cable of the new pressure sensor through the ope-
ning and secure the pressure sensor with two 3 mm Allen
screws.
2. Connect the cable of the pressure sensor to the board.
3. Calibrate the new pressure sensor on the test station in the ser-
vice mode of the service software.
Process
Figure
1. Close bleed screw
(A).
2. Loosen screw fittings
of the capillaries (B).
Fig. 55
Pressure sensor, front view
3. Screw out both
3 mm Allen screws
(C) that secure the
pressure sensor in
the interior of the
device.
4. Hold the pressure
sensor and guide it
out through the ope-
ning together with
the cable.
Fig. 56
Fastening screws, pressure
sensor
A B
C
