Equipment information

Siemens 900 C Ventilator
Manufacturer
Siemens
Model 900 C
Date 1994
Category: Medical and Biomedical Equipment
Group Ventilator
Description
Information
                                    The Servo Ventilator 900 C/D/E consists of two separate units.

The pneumatic unit comprises the gas conduction system with
two pressure transducers, two flow transducers and two servo
valves.

Each transducer, continuously delivers its actual value to
the electronic unit.

The servo valves are used as CONTROLLING ELEMENTS for the
control of inspiratory and expiratory gas conduction.
The electronic unit comprises three controlling systems, two
for regulation of inspiration and one for regulation of
expiration.

The three controlling systems will be in use, one at a time,
depending on the TIMING control and the selected ventilation
MODE.

These manuals are available for the above equipment:

Manual Type Service Manual Siemens-10585-Manual-Page-1-Picture
Pages 56
Size 12.00 Mbytes (12582185 Bytes)
Language english
Revision 3
Manual-ID/Number 93 82 912 E314E
Date 01 November 1994
Quality Scanned document, all readable.
Upload date
MD5 d3b8630015a86a7f38db7e19f0700a35
Downloads 31 since 09 March 2018
Information
Introduction..................................4

Principle diagram............................6

Pneumatic unit

Gas flow through the ventilator..............8

Gas supply................................9

Bellows and spring assembly........10

Gas supply unit . . . ...........11

02cell...................12

Relief/safety valve and working

pressure manometer............12

Flow transducer..............14

Pressure transducer............15

Inspiratory valve and step motor.......16

Expiratory vafve and pull magnet......17

Non-return valve..............17

Transducer interface.............18

Electronic unit

Principle of operation............19

Reference level generation.........20

Regulation of inspiration..........23

Timing..................28

Monitoring................33

Regulation of expiration..........39

Voltage supply...............41

Input/output................42

Disassembling

Disassembling the pneumatic unit......44

Disassembling the electronic unit......44

Replacement of step motor assembly

and pull magnet..............45

Replacement of power supply unit......45

Replacement of safety catches........45

Replacement of flow transducer.......46

Adjustments

Adjustment of meters Z1 and Z2.......46

Adjustment of valve arm..........46

Replacement and adjustment of R5......47

Removing the front panel knobs.......47

Front panel potentiometer adjustments. ...	48

Troubleshooting...............49

Index....................52

Block diagram................56
Siemens-10585-Manual-Page-1-Picture


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