Evita 4 Technical Documentation 8th edition Nov 2022

Copyright by Dräger Medical AG & Co. KGaA, Lübeck, Germany. Copying is prohibited for commercial purposes. Attention is to be paid to the Instructions for Use/Operating Instructions. This Technical Documentation does not replace the Instructions for Use/Operating Instructions. The warranty and liability conditions of the general terms and conditions for business transactions of Dräger Medical AG & Co. KGaA are not extended by this Technical Documentation. Safety Regulations: Reference is hereby made to the observance of the relevant safety provisions, such as the Medical Product Law (MPG) in Germany, the Pressure Container Ordinance (Druckbehälterverordnung), the Technical Rules for Pressurized Gases (Technische Regeln Druckgase) or the Occupational Health and Safety Provisions (Unfallverhütungsvorschriften). Insofar as reference is made to laws, regulations or standards, these are based on the legal system of the Federal Republic of Germany. Follow your local laws and regulations.

Contents General 1

Symbols and Definitions

2

Function Description 1

General

3

2

Basic principle

3

For internal use only. Copyright reserved.

K5664500IECIVZ.fm

3

2.1

Evita 4 ... 3

2.2

Evita 2 dura ... 6

2.3

Simplified block diagram of the Evita 4 ... 8

2.4

Simplified block diagram of the Evita 2 dura ... 9

CPU 68332 PCB

10

3.1

EEPROM ...11

3.2

Processor system ...11

3.3

RS232 interface ...11

3.4

ILV interface ...11

3.5

Driver ...11

3.6

Clock ...11

3.7

DUART ...11

3.8

DC/DC converter ... 12

3.9

CAN ... 12

3.10 Bus driver ... 12 3.11 Sound generator ... 12 3.12 Reset logic ... 12

5664.500 Evita 4/Evita 2 dura

Version 2.0

Contents

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Contents 4

5

For internal use only. Copyright reserved.

13

4.1

Electrical isolation ... 16

4.2

Power failure logic ... 16

4.3

Voltage monitoring ... 16

4.4

Measurement of temperature and pressure ... 16

CO2 measurement

17

5.1

CO2 sensor ... 18

5.2

Processor Board PCB ... 20

5.3

Power Supply PCB ... 21

6

Power pack

23

7

Evita 4 Graphics Controller PCB

24

8

K5664500IECIVZ.fm

CO2 Carrier PCB

7.1

Processor system ... 25

7.2

Uprog ... 25

7.3

Reset ... 25

7.4

Loudspeaker monitoring ... 25

7.5

Keyboard port and LED driver ... 25

7.6

Display control ... 25

7.7

CAN interface ... 25

7.8

DC/DC converter ... 26

Communication PCB (optional)

27

8.1

Processor system ... 28

8.2

Uprog ... 28

8.3

Reset ... 28

8.4

CAN interfaces ... 28

8.5

RS232 interfaces ... 28

5664.500 Evita 4/Evita 2 dura

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Contents

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Contents

9

10

8.6

Analog outputs ... 28

8.7

DC/DC converter ... 28

8.8

EEPROM ... 29

Pediatric Flow PCB (optional)

29

9.1

Flow measurement ... 30

9.2

Multiplexer ... 30

9.3

A/D Converter ... 30

IFCO Carrier PCB (optional nurse call and other)

31

10.1 General ... 31 10.2 Nurse call ... 31 10.3 Remote Pad ... 32 10.4 Ambient pressure sensor (optional) ... 32 11

Pneumatic Controller PCB

33

11.1 Pneumatic Controller PCB flow measurement ... 34 11.2 Pneumatic Controller PCB block diagram ... 35 11.3 Pressure measurement ... 36 11.4 Flow measurement ... 36 11.5 O2 measurement ... 36 11.6 Fan monitoring ... 36 11.7 Multiplexer ... 37 For internal use only. Copyright reserved.

K5664500IECIVZ.fm

11.8 Solenoid valves ... 37 11.9 PEEP valve control ... 37 11.10 HPSV interface ... 37 11.11 CAN interface ... 37 11.12 Processor system ... 37

5664.500 Evita 4/Evita 2 dura

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Contents 11.13 Serial EEPROM ... 38 12

HPSV Controller PCB

39

13

Front Panel PCB of Evita 2 dura

41

13.1 Processor system ... 42 13.2 Loudspeaker monitoring ... 42 13.3 Keyboard port and LED driver ... 42 13.4 Display control ... 42 13.5 Flash VPP ... 42 13.6 Voltage generation ... 42 13.7 CAN interface ... 42 14

7-Segment PCB of Evita 2 dura

43

15

Pneumatics

44

15.1 Gas connection block ... 45 15.2 Parallel mixer or mixer block ... 48 15.3 Mixer connection block ... 48 15.4 Cartridge valves or O2 and AIR HPS valves ... 49 15.5 Pressure sensors ... 51 15.6 Inspiration block ... 52 15.7 Patient system ... 54

For internal use only. Copyright reserved.

K5664500IECIVZ.fm

15.8 PEEP/PIP valve ... 56 15.9 AIR supply ... 57 15.10 O2 supply ... 58 15.11 Inspiration ... 59 15.12 Paw high ... 60 15.13 Emergency pressure relief mechanism ... 60

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Contents 15.14 Expiration ... 60 15.15 Medicament Nebulizer ... 61 16

Gas mixture

62

16.1 Function principle ... 62 16.2 Correcting the oxygen HPSV ... 62 16.3 Dependence on the input pressure ... 62 16.4 BTPS/NTPD conversion ... 63 17

Pneumatics function diagram

64

17.1 Pneumatics function diagram ... 65

For internal use only. Copyright reserved.

K5664500IECIVZ.fm

Replacing Non-Repairable Items 1

Replacing the O2 Sensor

66

2

Replacing the Ambient-Air Filter

67

3

Replacing the Cooling-Air Filter

68

4

Replacing the Battery for Data Protection

69

5

Replacing the Real-Time Clock

71

6

Pressure Regulator(s)

73

6.1

Replacing the AIR Pressure Regulator ... 73

6.4

Adjusting the O2 Pressure Regulator ... 78

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Contents Service Diagnosis Mode 1

General

79

2

Call-up of service diagnosis mode

81

3

”Front” diagnosis

82

3.1 4

For internal use only. Copyright reserved.

”Electronic” diagnosis

84

4.1

Diagnosis page ”Sensors” of ”Electronic” ... 84

4.2

Diagnosis page ”Microprocessor” of ”Electronic” ... 86

5

Diagnosis page ”Extended hardware” of ”Electronic”

89

6

”Pneumatic” diagnosis

90

7

K5664500IECIVZ.fm

Diagnosis page ”Microprocessor” of ”Front” ... 82

6.1

Diagnosis page ”Valves” of ”Pneumatics” ... 90

6.2

Diagnosis page ”Sensors” of ”Pneumatics” ... 92

6.3

Diagnosis page ”Microprocessor” of ”Pneumatics” ... 96

Error list

97

7.1

Diagnosis page ”Logbook” (error list) ... 97

7.2

Structure of the error list ... 98

7.3

Error number definition ... 99

Schematics and Diagrams 1

Slots for the PCBs

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Contents

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Contents

1

Spare Parts List

102

2

Test List

102

For internal use only. Copyright reserved.

K5664500IECIVZ.fm

Annex

5664.500 Evita 4/Evita 2 dura

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General

This Technical Documentation/Service Manual conforms to the International Standard IEC 60601-1. Read each step in every procedure thoroughly before beginning any test. Always use the proper tools and specified test equipment. If you deviate from the instructions and/or recommendations in this Technical Documentation/Service Manual, the equipment may operate improperly or unsafely, or the equipment could be damaged. Use only original Dräger parts and supplies. The maintenance procedures described in this Technical Documentation/Service Manual may be performed by qualified service personnel only. These maintenance procedures do not replace inspections and servicing by Dräger Medical AG & Co. KGaA.

Strictly follow the Instructions for Use/Operating Instructions! This Technical Documentation does not replace the Instructions for Use/Operating Instructions. Any use of the product requires full understanding and strict observation of the product-specific Instructions for Use/Operating Instructions.

All rights reserved. Copyright reserved.

K5664500A01.fm 03.03.03

Unless otherwise stated, reference is made to laws, regulations or standards (as amended) applicable in the Federal Republic of Germany.

5664.500/800 Evita 4/Evita 2 dura

Version 2.0

General

Page 1

1

Symbols and Definitions − A dash (-) is used to identify items on a list. − A bullet (•) is used to identify a sentence that contains direct work instructions.

This symbol is used to provide important information that, if ignored, could lead directly to a patient’s or operator’s injury. It is also used to provide important information that, if ignored, could lead directly to equipment damage and, indirectly, to a patient’s injury.

This symbol is used to provide additional information, operating tips, or maintenance suggestions.

Inspection

=

examination of actual condition

Servicing

=

measures to maintain specified condition

Repair

=

measures to restore specified condition

Maintenance

=

inspection, servicing, and repair

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K5664500A01.fm 03.03.03

Definitions according to German standard DIN 31051:

5664.500/800 Evita 4/Evita 2 dura

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General

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Function Description

1

General

The Evita 4/Evita 2 dura is a time-cycled, constant-volume long-term ventilator for adults and children. The features and ventilation modes depend on the specific device and its optional features; they are described in the Instructions for Use of the specific device.

2

Basic principle

2.1

Evita 4

The Evita 4 consists of three components which communicate via a CAN (fast serial interface). − Control unit − Electronics

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F5664500T015664800.fm 03.03.03

− Pneumatics

5664.500/800 Evita 4/Evita 2 dura

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Control unit Evita 4

IPPV

E Störung O2-Messung Einstellung

30 100% O2

P FiO2

20 10

Insp. hold

0

-----

MV

29

VT

669

P

26

i

Alarmgrenzen

Messw. Kurven

-10 1

3

2

Messmanöver

21

,700

1,50

13,5

IPPV

27

40

10

CPAP

Reset Check

SIMV Kalibration

BPAP Konfiguration

Electronics

I O

CAN

UNOM 100...140 VAC 50/60 Hz INOM 3,2...1,2 A

COM1 RS 232C F1, F2 T5H 250 V IEC 127-21V

ILV Sync.

SpO2

Temp. CO2

Extensionbox

Pneumatics ! Exp.

Fig. 1: Basic components

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F5664500T015664800.fm 03.03.03

2.1.1

Control unit

The control unit is the interface between the device and the operator. The control unit serves to make adjustments, to display measured values and to generate alarms. In the control unit the display, membrane keypad, touch screen and Graphics Controller PCB are accommodated.

5664.500/800 Evita 4/Evita 2 dura

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Function Description

Page 4

2.1.2

Electronics

The electronics is the central control unit of the Evita. It includes the CPU 68332 PCB, the CO2 Carrier PCB with the Processor Board PCB and Power Supply PCB and the power pack (Communication PCB, Paediatric Flow PCB, IFCO PCB, and the optional SpO2 PCB). 2.1.3

Pneumatics

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F5664500T015664800.fm 03.03.03

The pneumatics controls the pneumatic valves following preset ventilation parameters. It includes an independent microprocessor system and the valve control. In the pneumatics the Pneumatics Controller PCB, the HPSV Controller AIR/O2 PCB, the PEEP valve, the mixer, the pressure connection, the flow sensor and the O2 sensor are accommodated.

5664.500/800 Evita 4/Evita 2 dura

Version 2.0

Function Description

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2.2

Evita 2 dura

The Evita 2 dura has three components which communicate via a CAN (fast serial interface). − Control unit − Electronics − Pneumatics

Front panel Evita 4

IPPV

Einstellung

30

SIMV + ASB 100% O2

hold

Exsp. hold

FiO2 MVtotal

10

4

2

ts

1

60 30 0 30 60

10.2

MV

2

2

669

i Trigger L/min

Rampe s

Alarm Reset

Messw. Kurven PEEP mbar

f 26 bpm

Pplat

Messmanöver Flow IPPV U/min

PASB über PEEP

Reset Check

SIMV

Info. Bildstop aktiv

27 Ausdruck

Pinsp über PEEP

Tinsp s

P

3

O2 Vol% Alarmgrenzen

29

VT

26 29 Zusätze ,700 I :1,50 E FiO2 13,5 Konfi1:2 35 guration 4 ts

21 0

38 Pmean

VT ----L

Meß-

mbar werte 45 Meß25 manöver

Ppeak

0

0

L/min Alarm14.5 grenzen

12.8

-10 Insp. hold

Erw.

P mbar 20 40 20

100% Insp. O2

Evita 2 dura

E Störung O2-Messung

P

Stop

40

CPAP

10

Kurven

Werte 1 2

IPPV

BPAP BIPAP

SIMV

Kalibration weitere Modi

Konfiguration

Electronics

I O

CAN

UNOM 100...140 VAC 50/60 Hz INOM 3,2...1,2 A

COM1 RS 232C F1, F2 T5H 250 V IEC 127-21V

ILV

Sync. SpO2

Temp. CO2

Extensionbox

Pneumatics !

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F5664500T015664800.fm 03.03.03

Exp.

Fig. 2: Basic components

5664.500/800 Evita 4/Evita 2 dura

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Function Description

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2.2.1

Front panel

The front panel is the interface to the user. The front panel allows the user to adjust the desired values; it displays the measured values and alarms. The front panel also contains the LCD, the membrane keyboard, the 7-segment displays, the Front Panel PCB, and the 7-Segment PCB. 2.2.2

Electronics

The electronics is the central control unit of the Evita 2 dura. It contains the CPU 68332 PCB, the power pack, the CO2 Carrier PCB including the Processor Board PCB (optional), and the Power Supply PCB (optional). The Communication PCB, the IFCO PCB the Paediatric Flow PCB, and the SpO2 PCB are optional features. 2.2.3

Pneumatics

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F5664500T015664800.fm 03.03.03

The pneumatics controls the pneumatic valves following preset ventilation parameters. It includes an independent microprocessor system and the valve control. In the pneumatics the Pneumatics Controller PCB, the HPSV Controller AIR/O2 PCB, the PEEP valve, the mixer, the pressure connection, the flow sensor and the O2 sensor are accommodated.

5664.500/800 Evita 4/Evita 2 dura

Version 2.0

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2.3

Simplified block diagram of the Evita 4

P

P IPPV 30

E Störung O2-Messung

P FiO2

-----

MV

29

20 10

VT

0

669

-10 1

21

,700

3

2

1,50

P

26

O2

IPPV

13,5

5V

SIMV 27

40

CPAP

10

BPAP

4

5

10

25

11

12 13 14

9

3

18 19

20 21 2223 24

15

2

...

1

68 332 + TI 34010

6 7

68 332

16 17

68 332

Fig. 3: Basic principle

1 2

3 4

Keys Rotary knob including acknowledgement (by pressing knob) Touchscreen TFT display 640 x 480

5

Information LEDs and Alarm LEDs

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F5664500T015664800.fm 03.03.03

6 7 8 9 10 11

CAN bus Graphics processor reset Not applicable Loudspeaker with sound chip Second loudspeaker (piezo) Voltage monitoring (activates reset of the processors and the piezo) 12 Rechargeable battery (Goldcap capacitor)

5664.500/800 Evita 4/Evita 2 dura

13 Supply voltages 14 Power switch

15 Second inspiratory Paw 16 Reset pneumatics processor and venting 17 Electronics processor reset and second loudspeaker alarm 18 Inspiratory Paw 19 O2 sensor 20 FiO2 (HPSV mixer) 21 AIR (HPSV mixer) 22 Flow sensor 23 Expiratory valve with PEEP 24 Expiratory Paw

Version 2.0

Function Description

Page 8

2.4

Simplified block diagram of the Evita 2 dura

P

P SIMV + ASB

Erw.

!!! PAW hoch

P mbar

MVtotal

40

12.8

20

Ppeak

0

2

4

ts

60 30 0 30 60

38 Pmean

26 0

2

4

ts

L/min Alarm14.5 grenzen

10.2

Meß-

mbar werte 45 Meß25 manöver Pplat

I:E

FiO2

1:2

35 guration

O2

5V

29 Zusätze Konfi-

Info. Bildstop aktiv

4

5

25

10

11

12 13 14

9

3

Front panel

18 19

20 21 22 23 24

15

Electronics

Pneumatics

2

...

1

68020 + 68 332 + F 6554 x

6 7

68 332

16 17

68 332

Fig. 4: Basic principle

1 2

3 4

Keys Rotary knob including acknowledgement (by pressing knob) 7-segment displays LC or TFT display, 640 x 480

5

Information LEDs and Alarm LEDs

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F5664500T015664800.fm 03.03.03

6 7 8 9 10 11

CAN bus Graphics processor reset Not applicable Loudspeaker with sound chip Second loudspeaker (piezo) Voltage monitoring (activates reset of the processors and the piezo) 12 Rechargeable battery (Goldcap capacitor)

13 Supply voltages 14 Power switch

15 Second inspiratory Paw 16 Reset pneumatics processor and venting 17 Electronics processor reset and second loudspeaker alarm 18 Inspiratory Paw 19 O2 sensor 20 FiO2 (HPSV mixer) 21 Flow (HPSV mixer) 22 Flow sensor 23 Expiratory valve with PEEP 24 Expiratory Paw 25 Loudspeaker with current monitoring

5664.500/800 Evita 4/Evita 2 dura

Version 2.0

Function Description

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3

CPU 68332 PCB

The CPU 68332 PCB is integrated in the electronic unit of the Evita. The board includes an independent processor system, two external interfaces, three internal interfaces, the loudspeaker control and a serial EEPROM.

Service coding COM 1

Uprog

EEPROM

X2

Reset logic

Flash EPROM

CPU 68332 X2

Sound generator

X1

Bus driver

RAMs

Electrical isolation

COM1

RS232 driver X1, X2

CAN ILV interface ILV

+ 5V

DC/DC converter

Driver

+ 5V ISO

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F5664500T015664800.fm 03.03.03

Clock

X1, X2

2 x RS 232 for optional CO2 and SpO2

DUART

Fig. 5: Block diagram CPU 68332 PCB

5664.500/800 Evita 4/Evita 2 dura

Version 2.0

Function Description

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3.1

EEPROM

The EEPROM is connected to the synchronized, serial interface 68332. The EEPROM characterizes the Evita (enabled options, serial number, etc.). When replacing the CPU 68332 PCB the EEPROM has to be transferred to the new printed circuit board.

3.2

Processor system

The processor system comprises a 68332 CPU, a 512 kByte RAM and a 1 MByte flash EPROM (electrically programmable and erasable read-only memory). The RAM has a battery back-up. When the battery is being replaced a Goldcap capacitor ensures voltage supply of the RAMs. Programming of the flash EPROMS is only possible if the system identifies the ”SERVICE-Q” signal.

3.3

RS232 interface

The CPU 68332 PCB provides an RS232 interface in the Evita. The interface is labeled COM1. The interface is electrically isolated from the Evita. Electrical isolation is made by means of optocouplers.

3.4

ILV interface

The ILV interface is required for independent-lung ventilation with two Evita units. The ILV interface is not electrically isolated. Pin 3 of the ILV interface is provided with a filler plug. This filler plug prevents confusion with the RS232 interface.

3.5

Driver

The driver adjusts the access times between the 68332, the clock and the DUART.

3.6

Clock

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F5664500T015664800.fm 03.03.03

The clock gives the current time. It has a battery back-up and continues to operate even after the Evita has been switched off.

3.7

DUART

The DUART (Dual Universal Asynchronous Receiver/Transmitter) has two serial interfaces and digital inputs and outputs. The serial interfaces are intended for connection of the SpO2 and the CO2 module.

5664.500/800 Evita 4/Evita 2 dura

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Function Description

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