Service manual

Servo Ventilator 300/300A Introduction
E382 E380E 061 01 03 01 Siemens-Elema AB 21
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Inspiratory regulation
1. Choice between pressure regulation and
flow regulation during inspiration is
made by the MODE CPU dependent on the
Mode selection.
2. Main parameters used for the flow level
during inspiration when flow regulation
is used.
3. Main parameters used for the pressure
level during inspiration when pressure
regulation is used.
4. Inspiration rise time setting determines
the initial inspiration pattern. A succes-
sively increased flow/pressure level may
be more comfortable for the patient.
5. The O
2
concentration delivered to the
patient depends on the setting of these
O
2
concentration control knobs.
6. INSPIRATORY VALVE UNIT– AIR.
The control system is described in
section "Inspiratory feedback control
system" in this chapter.
7. INSPIRATORY VALVE UNIT– O
2
.
The control system is described in
section "Inspiratory feedback control
system" in this chapter.
Expiratory regulation
8. PEEP level setting is used as DESIRED
EXPIRATORY
PRESSURE VALUE. See section
"Expiratory feedback control system" in
this chapter.
9. EXPIRATORY VALVE interacts with the VALVE
CONTROL
board as described in section
"Expiratory feedback control system" in
this chapter.
Monitoring
10. The MONITORING board monitors and
generates certain displayed parameters.
It also activates alarm functions.
Computer interface
11. The optional COMPUTER INTERFACE board is
used as input/output signal interface and
includes functions for computer
communication (RS-232). The PC board
is equipped with the following
connectors:
– Master/Slave connection (N80)
– Analog I/O terminal (N81)
– Serial communication ports (N82/N83)
– Analog input & Digital code port (N84).
Power supply
12. The POWER SUPPLY board controls and
distributes power to the different parts
of the ventilator. The power source can
be:
– Mains power
– External battery
– Internal battery.
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