Servo Ventilator 300/300A
Description of functions
E382 E380E 061 01 03 01
Siemens-Elema AB
61
2
7 Inspiratory control
This main block consists of the board
PC 1616
INSPIRATORY
CONTROL
including its
MICROPROCESSOR
MODULE
PC 1588.
7.1 Mixer CPU including MIX-
PROM functions
This block includes the board PC 1588 with
a
MIX
-
PROM
. Some details of the Micro-
processor module PC 1588 are mentioned in
section General in this chapter. The
MIX
-
PROM
function is a control function for the block
7.3
MIXER
.
FLOW REF overrange
The overrange indication signal
OVERRANGE
.
H
(going to the block 4.1
MONITOR
/
ALARM
CPU
) is
activated in case the level of the input signal
FLOW
REF
is above 9.9 V during more than
50% of the duration of one Inspiration time
or
during more than 200 ms.
Since the scale factor of the
FLOW
REF
signal
is 3/18/45 V/l/s (Adult/Pediatric/Neonate) this
implies a limit value for the flow reference
signal
FLOW
REF
concerning overrange
indication as shown in the following table:
7.2 Inputs
This block is a multiplexor for input signals
to the main block 7
INSPIRATORY
CONTROL
.
Example of input:
• Front panel setting for O
2
concentration
(
O
2
CONC
SETTING
).
7.3 Mixer
Input signals used in this block are:
•
O
2
CONC
SETTING
(From main block 1
FRONT
PANEL
)
• One of the two flow reference signals
(from main block 6
REFERENCE
&
TIMING
)
Controlled by the block 7.1
MIXER
CPU
the
flow reference signal in use is split up into
partial flow reference signals used in the
main blocks 8
INSPIRATORY
VALVE
UNIT
–
AIR
and
9
INSPIRATORY
VALVE
UNIT
–
O
2
:
•
AIR
FLOW
REF
and
•
O
2
FLOW
REF
The sum of these reference level signals
(internal signal
TOT
.
FLOW
REF
) corresponds to
the flow reference input signal in use.
When the function Oxygen breaths is
activated – from main block 1
FRONT
PANEL
–
the
O
2
CONCENTRATION
value used for the split
up of the flow reference signal in this block
7.3
MIXER
is 100% during 20 breaths or
during 1 minute (whichever represents the
shorter time).
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>
Summary of Contents for Servo Ventilator 300
Page 4: ...4 Siemens Elema AB E382 E380E 061 01 03 01 Servo Ventilator 300 300A Notes Notes ...
Page 6: ...6 Siemens Elema AB E382 E380E 061 01 03 01 Servo Ventilator 300 300A Notes Notes ...
Page 18: ...20 Siemens Elema AB E382 E380E 061 01 03 01 Introduction Servo Ventilator 300 300A 1 Notes ...
Page 22: ...20 Siemens Elema AB E382 E380E 061 01 03 01 Introduction Servo Ventilator 300 300A 1 Notes ...
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