Maquet Servo Ventilator 900 D Ventilator
Manufacturer:
Model:
Servo Ventilator 900 D
Date:
Category:
Group:
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.

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Service Manual
Manual type:
Service Manual
Pages:
55
Size:
2.88 Mbytes (3022360 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Electronic document, no scan, very well readable.
Upload date:
08 March 2018
MD5:
65c3972cef97500d50e5ef52836b313a
Downloads:
457
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 Thus, some information in the Service Manual may be outdated.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

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