Equipment information

Maquet Servo Ventilator 900 D Ventilator
Manufacturer
Maquet
Model Servo Ventilator 900 D
Date
Category Medical and Biomedical Equipment
Group Ventilator
Description
Information
                                    The SERVO Ventilator 900 C/D/E consists of two sepa-­
rate 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 Maquet-10553-Manual-Page-1-Picture
Pages 55
Size 2.88 Mbytes (3022360 Bytes)
Language english
Revision
Manual-ID/Number
Date
Quality Electronic document, no scan, very well readable.
Upload date
MD5 65c3972cef97500d50e5ef52836b313a
Downloads 347 since 08 March 2018
Information
The Servo Ventilator 900 was orginally manufactured and sold
by Siemens. Please note that this Service Manual has only
been re-labeled from Siemens to Maquet. No further
significant changes are made. Thus, some information in the
Service Manual may be outdated.


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
	 O2cell  ... 
 	12
	 Relief/safety valve and working
	 pressure manometer ... .
 1
 	 2
	 Flow transducer ... 
 	14
	 Pressure transducer  ... .
 	15
	 Inspiratory valve and step motor  ... .
 	16
	 Expiratory valve and pull magnet  ... .
 	17
	 Non-return valve ... 
 	17
Transducer interface ... .
 	18
Electronic unit
	
 Principle of operation ... 
 	19
	
 Reference level generation ... 
 2
 	 0
	
 Regulation of inspiration ... .
 	23
	
 Timing ... 
 	28
	
 Monitoring  ... 
 	33
	
 Regulation of expiration ... 
 	39
	
 Voltage supply  ... .
 	41
	
 Input/output ... .
 	42
Disassembling
	
 Disassembling the pneumatic unit  ... .
 4
 	 4
	 Disassembling the electronic unit. ... 
 	44
	 Replacement of step motor assembly
	 and pull magnet ... 
 	45
	 Replacement of power supply unit  ... .
 4
 	 5 	
	 Replacement of safety catches  ... 
 	45
	 Replacement of flow transducer  ... .
 	46
Adjustments
	 Adjustment of meters Z1 and Z2 ... .
 	 4
6
	 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
Maquet-10553-Manual-Page-1-Picture


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