B. Braun Infusomat fmS, Service Manual

Page: 54 / 86

Unit Elements
4
4 - 14 Infusomat® fmS 2.3 gb
4.10 Pressure Sensor Test Equipment Ord. No.
Pressure calibration device . . . . . . . . . . . . . . . . . . . . . . 0770 5018
Calibration gauge 4 mm (for adjustment after . . . . . . 0770 1489
exchange of the pump cover)
Designation Ord. No.
Pressure sensor (cmpl.). . . . . . . . . . . . . . . . . . . . . . . . . . 3450 7353
(only delivered when a pressure
calibration device is available)
Exchange
CAUTION
The pressure sensor unit is mechanically very sensitive. It must not
be dismounted, which means that the pressure sensor board and
the spring element must not be detached from the pressure sensor
support (plastic part). Make sure that the movement of the coil
core inside the coil is not hindered.
The pressure sensor consists of the light barrier board with EEP-
ROM and the pressure sensor board with holder. Coil core and
bending element are screwed to this holder. Both boards are con-
nected via a flat cable.
1. Dismount rear panel (see „Rear Panel“
➪
p. 4 - 6) or pump
unit (see „Pump Unit“
➪
p. 4 - 12) .
2. Pull off the connecting cable to the microprocessor board.
3. Loosen and remove screw (1) of the light barrier board.
4. Loosen screw (2) of the pressure sensor and remove it togeth-
er with plain washer and serrated lock washer. Then remove
pressure sensor with pressure sensor board and light barrier
board.
5. Fit pressure sensor with pressure sensor- and light barrier
board.
Note
Make sure that the pressure sensor slide can smoothly run in the
guides and that the coil core can move inside the coil.
6. Calibrate pressure sensor:
a) Switch on unit and call in the pressure sensor reading in
the Service Program (see „Pressure Sensor Function
310.0“
➪
p. 3 - 6)
b) Loosen screw (2) on the side of the pressure sensor unit
(2.5 mm Allen key).
Fig.: 4 - 14
Pressure sensor with
Light barrier
Screw (1)
Screw (2)
board
pressure sensor board
Serrated lock washer
Plain
washer
Do not loosen screw