B. Braun Infusomat fmS, Service Manual

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System Overview
1
Infusomat® fmS 2.3 gb 1 - 9
Mechanical Occlusion Pressure:
The Infusomat® fmS has a linear peristaltic pump. This pump has
12 slides which are driven by a camshaft.
When the pump cover is closed, the pump tube is squeezed (oc-
clusion) by at least one of the slides, independent of the pump
head position. The complete pump unit is mounted behind the
front panel in the cabinet frame. The hinges and the locking bow
for the pump cover are led through the front panel. The pump cov-
er is automatically closed when the operating unit door is closed.
The slides are pressed against the pump cover by a spring system
in the pump unit. Thereby a delivery pressure is realized and me-
chanically limited by the springs.
If the pressure limit is exceeded there is no volume delivery. The
drop sensor activates an alarm. If one of the springs fails, the
spring system will ensure that an unsafe condition cannot occur
(free flow). The two remaining springs ensure an appropriately
high occlusion pressure.
Electronic Occlusion Pressure:
The electronic occlusion sensor is mounted on the output side of
the pump. A spring pressure loaded slide is seated on the infusion
line. An increase of pressure in the infusion line leads to a deflec-
tion of the coil core via the pressure slide. The depth of immersion
is measured inductively. When a preset pressure threshold is
reached the pump drive is switched off, and an alarm is activated.
The electronic occlusion pressure is a single channel circuit. In
case of a failure, the mechanically limited maximum pressure can
be reached.
Motor Switch-Off by Both Processors:
Function processor: MS signal to switch off the motor drive. -
Control processor: MOTEIN signal to switch off the drive of the
motor operating voltage.
Computer Interface The Infusomat® fmS is equipped with a computer interface. It can
be connected to the optical interface or via the MFC service con-
nector. To activate the computer operation please ask for a de-
tailed description from B. Braun.
Up to software version IFMC: DIANET
From software version IFMe, IFME on: Dianet
Star