Drager Babylog 8000, Babylog 8000SC, Babylog 8000 plus User manual

Technical Service Manual

Babylog 8000/8000SC/8000 plus Intensive Care Ventilator

Emergency Care • Perioperative Care • Critical Care • Perinatal Care • Home Care

Revision 10.0

6173.3 9029623

Because you care

Copyright by Dräger Medical AG & Co. KGaA, Lübeck, Germany.

No reproduction allowed for commercial purposes.

Read and understand the Instructions for Use/Operator’s Manual.

This Technical Documentation does not replace the Instructions for Use/Operator’s Manual.

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.

Observe all applicable technical laws and regulations.

Insofar as reference is made to laws, regulations or standards, these are based on the legal system of the Federal Republic of Germany. Observe the laws and regulations applicable in your country.

Contents

General

1 Notes 9

1.1 Symbols and Definitions ......................................................................................................... 9

Function Description

1 General 13

1.1 Ventilation Modes ................................................................................................................. 13

1.2 Additional Functions ............................................................................................................. 13

1.3 Monitoring ............................................................................................................................. 13

2 Block Diagrams 14

2.1 Block Diagram of the Components in

Babylog 8000/Babylog 8000 SC with LC Display 14

2.2 Block Diagram of the Components in

Babylog 8000/Babylog 8000 plus with EL Display 15

2.3 Block Diagram of the Babylog 8000/ Babylog 8000 plus/Babylog 8000 SC ........................ 16

3 Airway Monitoring 17

3.1 Airway Pressure ................................................................................................................... 17

3.2 Trigger Signal ....................................................................................................................... 17

3.3 Measurement of the Fraction of Inspired O2 ....................................................................... 17

3.4 Patient Flow (Babylog 8000/Babylog 8000 plus) .................................................................. 18

4 Monitoring Functions 19

4.1 Fraction of inspired O

(FiO2) ............................................................................................... 19

2

4.1.1 O

4.1.2 O

Measurement .................................................................................................... 19

2

Calibration ......................................................................................................... 19

2

4.2 Gas Supplies ........................................................................................................................ 20

4.3 Airway Pressure Monitoring ................................................................................................. 20

4.4 Disconnect Monitoring ..........................................................................................................20

4.5 Overpressure and Low Pressure Alarms ............................................................................. 21

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Contents

4.5.1 Babylog 8000 up to Software Version 3.0 ...............................................................21

4.5.2 Dynamic Stenosis Limit ...........................................................................................21

4.6 Minute Volume Monitoring (Babylog 8000/Babylog 8000 plus) ............................................ 23

4.6.1 Babylog 8000 with Software Versions 2 and 3 ....................................................... 23

4.6.2 Babylog 8000 Software with Version 4.0 or Higher ................................................ 23

4.6.3 Babylog 8000 plus ..................................................................................................23

4.7 Audible Alarm Generator Monitoring ....................................................................................23

4.8 Operating Voltage Monitoring ...............................................................................................23

4.9 Rotary Potentiometer Monitoring .......................................................................................... 23

4.10 ROM Test ..............................................................................................................................24

4.11 RAM Test ..............................................................................................................................24

4.12 Temperature Monitoring ........................................................................................................24

4.13 Relay and Valve Monitoring ..................................................................................................24

4.14 Battery Monitoring ................................................................................................................24

4.15 Flow Measurement Monitoring (Babylog 8000/ Babylog 8000 plus) ....................................24

5 Alarms, Cautions and Advisory Messages 25

5.1 Message Display .................................................................................................................. 25

5.2 Display and Menu .................................................................................................................25

5.2.1 Babylog 8000/Babylog 8000 SC with LC Display ...................................................26

5.2.2 Babylog 8000/Babylog 8000 plus with EL Display .................................................. 26

6 Function of the Control Elements 27

6.1 Potentiometers (Rotary Knobs) ............................................................................................ 27

6.1.1 Fraction of inspired O

6.1.2 Inspiratory time (T

(O2 vol.%) .......................................................................... 27

2

) .................................................................................................27

I

6.1.3 Expiratory time (T

) ................................................................................................27

E

6.1.4 Inspiratory flow (Insp. Flow) .................................................................................... 27

6.1.5 Inspiratory pressure limit (P

) .............................................................................27

insp

6.1.6 PEEP/CPAP ............................................................................................................27

6.2 Keys ......................................................................................................................................28

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Contents

6.2.1 CPAP ...................................................................................................................... 28

6.2.2 IPPV/IMV (CMV) (up to software version 4.n) ........................................................ 28

6.2.3 Man. Insp. ............................................................................................................... 28

6.2.4 2-min Silence .......................................................................................................... 28

6.2.5 Reset/Check (OK) .................................................................................................. 28

6.2.6 Backlight On/Off (Babylog 8000/8000 SC with LC Display) ................................... 28

6.2.7 "Cal. Config." (as of software version 5.n) .............................................................. 29

6.2.8 Keys ....................................................................................................................... 29

7 Cold Start/Warm Start Behavior 30

7.1 Cold-Start Behavior .............................................................................................................. 30

7.2 Warm-Start Behavior ............................................................................................................30

8 Description of Pneumatic Functions 31

8.1 Gas Supplies ........................................................................................................................ 31

8.2 Controlled Ventilation ........................................................................................................... 32

8.2.1 Inspiration ............................................................................................................... 32

8.2.2 Expiration ............................................................................................................... 33

8.2.3 PEEP ...................................................................................................................... 33

8.2.4 CPAP ...................................................................................................................... 33

9 Measurement of the Ventilation Parameters 34

9.1 O2 Measurement .................................................................................................................. 34

9.2 Measurement of the Airway Pressure .................................................................................. 34

9.3 Pneumatics Control PCB ...................................................................................................... 35

9.4 Pneumatics Analog PCB ...................................................................................................... 36

9.5 Patient System Heater ......................................................................................................... 37

9.6 Pressure Sensor Base PCB ................................................................................................. 37

9.7 O2 Amplifier PCB ................................................................................................................. 37

10 Components of the Electronic Assembly 38

10.1 Power Supply Unit ................................................................................................................ 38

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Contents

10.2 Motherboard PCB ................................................................................................................. 38

10.3 CPU 68000 PCB ...................................................................................................................39

10.4 I/O PCB ................................................................................................................................40

10.5 Flow PCB (Babylog 8000/Babylog 8000 plus) (optional) ...................................................... 41

10.6 Monitoring PCB ....................................................................................................................42

10.6.1 Measurement of Analog Signals .............................................................................42

10.6.2 Measurement of Digital Inputs ................................................................................42

10.6.3 Measurement of Digital Outputs ............................................................................. 42

10.7 Front Adapter PCB ...............................................................................................................45

10.8 Front Controller PCB

(Babylog 8000/Babylog 8000 SC with LC Display) 46

10.9 Front PCB (Babylog 8000/Babylog 8000 plus with EL Display) ........................................... 47

10.10Display PCB (Babylog 8000/Babylog 8000 SC with LC Display) .........................................48

10.11EL display (Babylog 8000/Babylog 8000 plus with EL Display) ........................................... 49

10.12Potentiometer Field .............................................................................................................. 50

10.13Display Field .........................................................................................................................50

10.14Communication PCB ............................................................................................................ 51

10.15Interface PCB .......................................................................................................................52

11 Sensors 53

11.1 Pressure Sensors .................................................................................................................53

11.2 Y-Piece with Flow Sensor (Babylog 8000/Babylog 8000 plus) .............................................53

11.2.1 Measuring Principle of the Flow Measuring Bridge ................................................ 54

11.3 O2 Sensor ............................................................................................................................55

IV

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Contents

Replacing Non Repairable Items

1 Important Information 59

2 Cleaning or Replacing the Cooling Air Filter Every 4 Weeks 60

3 Replacing the O

3.1 O

Sensor Calibration ........................................................................................................... 61

2

3.2 Calibrating the O

3.3 Disposing of the O

Sensor Capsule 61

2

Sensor After Replacement ...................................................................... 61

2

Sensor Capsule .................................................................................... 63

2

4 Replacing the Lip Seals Every 2 Years 64

5 Replacing the NiCd Battery (Power Failure Alarm) Every 2 Years 65

6 Replacing the Pressure Reducer Every 6 Years 67

Schematics and diagrams

1 Schematics and Diagrams 77

Error List

1 Error messages 91

2 List of device error messages 92

Annex

Spare parts list 97

Test List 97

Technical Information according to EMC standard IEC/EN 60601-1-2:2001 97

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Contents

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General

7

8

Babylog 8000 General

1Notes 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.

1.1 Symbols and Defini-

tions

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

This symbol indicates a warning.

This symbol indicates tips and useful information.

This symbol is used to alert against unsafe practices when handling electrostatic sensitive devices (ESD).

Definitions according to German standard DIN 31051:

Inspection = examination of actual condition

Maintenance = measures to maintain specified condition

Repair = measures to restore specified condition

Servicing = inspection, maintenance, and repair

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General Babylog 8000

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Version 1.0_ Released_Printed on_18.05.05_GBK61733XXA01.fm

Function Description

11

12

Function description Babylog 8000

1 General

Babylog 8000/Babylog 8000 plus has a flow measurement function. The Babylog 8000 SC can be upgraded to a Babylog 8000 using the "flow measurement conversion kit.

1.1 Ventilation Modes

Babylog 8000/Babylog 8000 plus/8000 SC provides the following ventilation modes:

 IPPV (Intermittent Positive Pressure Ventilation), controlled and assisted constant-volume ventilation

 SIPPV (Synchronized Intermittent Positive Pressure Ventilation), synchronized controlled and

assisted constant-volume ventilation

 IMV (Intermittent Mandatory Ventilation)

 SIMV (Synchronized Intermittent Mandatory Ventilation) weaning method for spontaneously

breathing patients

 CPAP (Continuous Positive Airway Pressure) spontaneous breathing with positive airway pressure

 PSV (Pressure Support Ventilation) (optional as of software version 5.n)

1.2 Additional Functions

Babylog 8000/Babylog 8000 plus/8000 SC provides the following (optional) additional functions:

 High-frequency ventilation (HV) (as of software version 4.n)

 Volume guarantee (VG) (as of software version 5.n)

1.3 Monitoring

Babylog 8000/Babylog 8000 plus/8000 SC has integrated monitoring functions for:

 Fraction of inspired O

 Airway pressure (Paw)

 Flow (

) (Babylog 8000/Babylog 8000 plus)

(FiO2)

2

 Minute volume (MV)

 Tidal volume (V

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T

13

Function description Babylog 8000

2 Block Diagrams

2.1 Block Diagram of the Components in Babylog 8000/Babylog 8000 SC with LC Display

Elektronic unit

Loud speaker

Vol.% O2

O2 sensor

O2 ampilfier

Flow connector

CPU 68000 PCB

Battery

Fan

RS232 PCB

Pexsp

Pinsp

pressure AIR

pressure O2

Pressure sensor PCB

Communication PCB

Watch dog PCB Monitoring PCB

Flow PCB (not 8000SC)

I/O PCB

Power supply PCB

Power cord

Front

LP Mutterboard

Frontadapter PCB

Frontcontroller PCB

Display PCB

Monitoring field

Pneumatic unit

Potentiometer field

Patiententeil-

Pneumatic Analog

PCB

Pneumatic

driver PCB

heating

PEEP/PIP

Valves

LC display

Fig. 1: Block diagram of the Babylog 8000/8000 SC with LC display

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Function description Babylog 8000

2.2 Block Diagram of the Components in Babylog 8000/Babylog 8000 plus with EL Display

Elektronic unit

Loud speaker

Vol.% O2

O2 sensor

O2 amplifier

Flow connector

CPU 68000 PCB

Battery

Fan

RS232 PCB

Pexsp

Pinsp

pressure AIR

pressure O2

Pressure sensor PCB

Ccommunication PCB

Watch dog PCB Monitoring PCB

Flow PCB

I/O PCB

Power supply PCB

Power cord

Front

LP Mutterboard

Frontadapter PCB

Front PCB

ELD converter

Monitoring field

Pneumatic unit

Potentiometer field

Patient unit

Pneumatic

Analog PCB

Pneumatic amplifier

PCB

heating

PEEP/PIP

Valves

EL display

Fig. 2: Block diagram of the Babylog 8000/Babylog 8000 plus with EL display

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Function description Babylog 8000

2.3 Block Diagram of the Babylog 8000/ Babylog 8000 plus/Babylog 8000 SC

LEDs 2 red Alarm LEDs

Communication

Flow Babylog 8000 Babylog 8000 plus

EVE

V

Flow sensor

LC display

E

P

AIR

P

EL display (Babylog 8000/

Babylog 8000 plus)

Front

CPU (Master)

I/O

E

P

PO2

E

P

Potentiometer

keys

E

Pinsp

O

P

O2-SensorPexsp

E

O

24 Ventile

Monitoring

+27 V

Battery

Reserve horn

+5 V

&

Valve amplifier

PEEP/PIP valve

Valve monitoring

Fig. 3: Block Diagram of the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC

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Function description Babylog 8000

3 Airway Monitoring

In the ventilation modes IPPV/IMV and CPAP, the airway pressure (Paw), the flow at the Y-piece V (Babylog 8000/Babylog 8000 plus), and the fraction of inspired O

(FiO2) are measured.

2

T

Depending on the selected mode and the menu settings, the parameters are monitored and displayed on the screen. Pressure and flow curves as well as their storage can be displayed graphically on the LC display or EL display. In all ventilation modes, the chronological sequence of the airway pressure (Paw) is displayed in the LED bargraph.

3.1 Airway Pressure

Two internal pressure sensors measure the pressure at the inspiratory outlet (Pinsp) and the pressure at the expiratory inlet (Pexp). The airway pressure is calculated as follows:

Paw = Pinsp – 0.7 (Pinsp – Pexp)

The following pressures are calculated from the Paw pressure signal:

 Peak pressure (Peak)

 Mean airway pressure (Pmean)

 Positive end-expiratory pressure (PEEP)

The peak pressure is the maximum positive pressure of the most recent respiratory cycle. After 30 s, at the latest, a new respiratory cycle must be recognized and a new measured value for the peak pressure must be generated, otherwise the current measured value is no longer valid and is removed from the display.

The mean airway pressure is the initial value of a software digital filter.

The PEEP is either the pressure value during the expiratory phase at a zero expiratory flow or the last measured value before the next inspiration. Like the peak pressure, the PEEP is no longer valid after 30 s and is removed from the display if a new measured value is not generated within the 30-s period.

3.2 Trigger Signal

In order to generate a trigger signal, the inspiratory flow must be integrated during spontaneous breathing and compared to the adjustable trigger threshold.

3.3 Measurement of the Fraction of Inspired O

A O2 sensor in the inspiration line measures the O2 content of the respiratory gas.

Calibration data of the O out of operation for more than 24 hours, a calibration will automatically be carried out upon power-on.

sensor is maintained after switching off the Babylog. If the Babylog has been

2

The operator may also initiate a calibration manually, e.g. as required after replacing an O

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sensor.

2

17

Function description Babylog 8000

A two-step calibration with 21% and 100% O2 is always carried out in order to achieve a higher measurement accuracy over the whole concentration range and/or to be able to recognize a spent sensor cell.

The calibration procedure is described under section "4 Monitoring Functions".

If the O field of the screen by the flashing indication "FiO

measurement fails, the Babylog generates an alarm. This alarm status is shown in the status

2

".

2

3.4 Patient Flow (Babylog 8000/Babylog 8000 plus)

A direction-sensitive hot-wire flowmeter integrated into the Y-piece measures the inspiratory and expiratory flows through the tube. This measurement function must be reactivated each time after switching on Babylog 8000/Babylog 8000 plus and after each replacement of the sensor by calibrating the sensor. The flow signal is used to calculate the following values:

 Tidal volume (V

 Minute volume (MV)

 Percentage of the MV uptake through spontaneous breathing

 Tube leakage

The tidal volume is the expiratory flow signal applied between two breathing phase cycles.

Unlike the tidal volume, the minute volume is not related to a respiratory cycle. In the same way the inspiratory MV is calculated for leak rate detection. The expiratory minute volume is displayed. In addition to the complete minute volume, Babylog also calculates the expiratory minute volume uptake through spontaneous breathing.

)

T

Babylog calculates the percentage by comparing the total minute volume and the minute volume uptake through spontaneous breathing:

spont. = (MVspontaneous/MV)

100%

*

The leakage at the tube can be estimated by comparing the inspiratory and the expiratory minute volume.

The leakage at the tube L is calculated as follows:

L= (MVinsp

_

MVexp)/(MVinsp + MVexp) * 100.

The respiratory rate f is measured through the inspiratory respiratory phase cycles.

All measured values derived from the patient flow become valid only after successful calibration of the flow sensor.

If the flow sensor or the measuring electronics fails, an alarm is generated. However, Babylog can still be used without the functions depending on the flow measurement. This alarm status is shown in the status field of the screen by the flashing indication "flow".

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Function description Babylog 8000

4 Monitoring Functions

The system checks whether limit values are kept and all functions are ok. If a function fails or if the limit values are not met, Babylog will generate an alarm.

4.1 Fraction of inspired O2 (FiO2)

4.1.1 O2 Measurement

The measured O automatically set at ±4 vol.% below the set FiO when the set value (O

value is checked against upper and lower limit values. The alarm limits are

2

value. A time delay makes sure no alarm is activated

2

) is changed or when the O2 sensor is calibrated.

2

The absolute sensor voltages are checked. The differential voltage between the two sensor cells must be lower than (U1 + U2)/8 +1 mV. The output voltage of each individual cell must be between 9.5 mV and

123.6 mV.

4.1.2 O

The O

Calibration

2

sensor is either automatically calibrated 24 hours after the last calibration or manually after

2

selection from the mode menu.

If the O

sensor is replaced during operation the new O2 sensor will be calibrated automatically. However,

2

Babylog cannot detect a sensor replacement if the unit is switched off. In this particular case, the operator has to calibrate the new O

sensor manually.

2

By switching over a valve the sensor is separated from the respiratory gas flow and purged with the calibration gas (O

). This leads to a change in concentration at the O2 sensor. This change in

2

concentration allows the Babylog to recognize the activation of the calibration valve.

The calibration valve is deactivated as soon as the calibration is completed.

A two-step calibration with 21% O

and 100% O2 is carried out in order to achieve a higher measurement

2

accuracy over the whole concentration range and to be able to recognize a spent sensor cell.

During the calibration procedure the microprocessor system processes (synchronizes) one of the two O sensor channels. The O

channels are then submitted to a specific sequence of states controlled by one

2

of the microprocessor systems and monitored for correct sequence and maximum period by the other. For instance, searching of the calibration values for 21% or 100% must not last longer than 3.5 minutes each.

The calibration value for 21% must be between 9.2 mV and 26 mV, and for 100% between 43.6 mV and

123.6 mV; this applies to both channels. The zero voltage resulting from both values must be between

–6 mV and +6 mV.

After calibration is completed, the software checks whether the limit values respond correctly.

Calibration stops if a control gas fails.

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Function description Babylog 8000

4.2 Gas Supplies

The current measured values of the O2 and AIR gas supplies are considered when the valve bank is adjusted. The inlet pressure for O

If the pressure falls below the limit value, a visible and audible alarm is generated. The operator is informed about the cause of the alarm by a plain text message on the display. If the adjusted O concentration is 21% or 100%, only an advisory message (no alarm) is displayed if the non-added gas type fails.

If the pressure exceeds the limit value, the safety venting mechanism is activated and the continuous flow is switched off. The Babylog will continue to operate only when the pressure has decreased to a permissible level.

and AIR is 1.7 bar.

2

If the AIR supply fails, the Babylog control switches to O

supply. If the O2 supply fails, Babylog switches

2

to AIR supply.

4.3 Airway Pressure Monitoring

Depending on the selected mode and parameter settings, a certain airway pressure time profile is set. If the actual profile deviates from the set profile, the Babylog generates an alarm.

4.4 Disconnect Monitoring

Babylog recognizes whether or not the hose system has been connected correctly. If the hose system has been connected incorrectly, the continuous flow is (partly) directed to atmosphere. No pressure builds up in the hose system. Babylog checks during each breathing cycle whether a sufficiently high pressure is available during inspiration. Since inspiratory breaths occur in the mandatory ventilation modes IPPV/IMV, SIPPV and SIMV, this monitoring does not function in the CPAP mode.

Paw

Pinsp

Tdis

Pdis

PEEP

Tdis > 25 ms !

Pdis =

Pinsp - PEEP

4

Fig. 4: Disconnect Monitoring

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+ PEEP

time

Zeit

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Function description Babylog 8000

During each mandatory breath, the level of the disconnection pressure (Pdis) must be exceeded without interruption for at least the disconnection time (Tdis), otherwise an alarm will be generated. Pdis is a function of the settings Pinsp and PEEP. If Pinsp is set considerably higher than the actually attained pressure, the Pdis alarm level likewise increases.

Depending on the flow and the inspiration time settings, the level might not be attained any more. Babylog 8000 generates an alarm even if there is no leakage in the breathing system.

4.5 Overpressure and Low Pressure Alarms

During the inspiratory and expiratory phases, the airway pressure (Paw) must not exceed the set pressure limit by more than 10 mbar. If the set pressure limit is exceeded by 10 mbar to 20 mbar, Babylog generates an alarm and, at the same time, reduces the inspiratory breath time. The remaining time is added to the CPAP phase. If the set pressure limit is exceeded by more than 20 mbar, an alarm is activated and the breathing system is vented.

In the CPAP phase, the airway pressure must be

r4 mbar of the set PEEP/CPAP. Otherwise an alarm will

be generated. If the limit is exceeded by more than 10 mbar, venting is carried out as during the inspiratory phase even if the pressure falls below the absolute level of —2 mbar.

These overpressure and low pressure alarms apply to all ventilation modes.

4.5.1 Babylog 8000 up to Software Version 3.0

Paw

Stenose 2 (Notentlüftung)

10 mbar

Stenose 1 (Inspiration Exspiration)

10 mbar

Pinsp

6 mbar

Entlüftung

PEEP

4 mbar

-2 mbar Zeit

time

Fig. 5: Alarms

4.5.2 Dynamic Stenosis Limit

The dynamic stenosis limit applies to Babylog 8000 units with software version 4.0 and Babylog 8000 SC

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Function description Babylog 8000

units with software version 1.0.

The limit value is (Pinsp + 5 mbar).

If this limit value is exceeded, the microprocessor system reads in the actual measured value at 8.3-ms intervals (sampling frequency). The limit value (Pinsp + 5 mbar) is subtracted from each of the actual measured values and entered in a summer.

As soon as the sum of 40 mbar (stenosis 1) is reached, Babylog switches over from inspiratory phase to expiratory phase. If a sum of 70 mbar is reached, despite of the safety measure (stenosis 1), the system will carry out an emergency venting.

Paw

Σ = 40 mbar Stenose 1

Σ = 70 mbar Stenose 2

Pinsp + 5 mbar

Pinsp

PEEP

Fig. 6: Dynamic stenosis limit

8,3

8,3 ms

time

Zeit

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Function description Babylog 8000

4.6 Minute Volume Monitoring (Babylog 8000/Babylog 8000 plus)

The abbreviation MV (for minute volume) is used in the following text.

4.6.1 Babylog 8000 with Software Versions 2 and 3

The monitoring menu is used to set the upper and lower alarm limits in the range of 0.03 L/min to 15 L/min. The upper and lower alarm limits are continuously compared with the measured MV value. If the value exceeds the upper alarm limits or falls below the lower alarm limit, the system will activate an alarm. Monitoring is deactivated during calibration of the flow sensor (Babylog 8000) to allow the measured MV value to stabilize. If the flow measurement system fails, the MV monitoring becomes ineffective.

4.6.2 Babylog 8000 Software with Version 4.0 or Higher

The monitoring menu is used to set the upper and lower alarm limits in the range of 0.00 L/min to 15 L/min. The upper and lower alarm limits are continuously compared with the measured MV value. If the value exceeds the upper alarm limits or falls below the lower alarm limit, the system will activate an alarm. Monitoring is deactivated during calibration of the flow sensor (Babylog 8000) to allow the measured MV value to stabilize. If the flow measurement system fails, the MV monitoring becomes ineffective.

4.6.3 Babylog 8000 plus

Babylog 8000 plus has the software 5.n.

4.7 Audible Alarm Generator Monitoring

Babylog has two audible alarm generators (loudspeaker and piezo). During normal operation, the loudspeaker is the audio interface to the operator in the event of alarms. The piezo is only used in the event of power or loudspeaker failure.

At the end of the self-test, the loudspeaker is triggered with a test signal. This test signal is monitored with a microphone. If there is no feedback, Babylog generates error 817.

4.8 Operating Voltage Monitoring

During operation, Babylog uses comparators to continuously monitors whether the operating voltages are within specified limits.

When Babylog is switched on, these comparators are checked by a defined changing of the comparator reference voltage.

4.9 Rotary Potentiometer Monitoring

Input via rotary potentiometers are processed by two channels. Two microprocessor systems read the input via independent channels and compare the results.

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Function description Babylog 8000

4.10 ROM Test

During operation, the ROM area used is summed up per byte in a long word variable (long word = 32 bits) which is compared to the check sum stored in the ROM. If the check sums do not match, an error message will be displayed.

4.11 RAM Test

During operation the RAM area used is tested with a simple algorithm. By writing 55 hex or AAhex in each cell every bit is checked for settability and resettability.

4.12 Temperature Monitoring

A temperature sensor measures the internal temperature of the Babylog. If the temperature is not within the range of –20 °C to 75 °C, an alarm will be generated. If the temperature is too high, a message will inform the operator about a possible failure of the fan.

4.13 Relay and Valve Monitoring

An excess-current monitoring function is integrated into the trigger electronics of the valves. The excesscurrent monitoring function is tested after switching on Babylog. If a valve is switched on and operated with the operate voltage for an excessive period of time, the excess-current monitoring function responds within a specific time.

The relay which enables de-energizing of the whole pneumatics assembly is also tested once after poweron. For this purpose, the relay is switched on and off once and the voltages at the relay contact are measured.

During operation, the system checks whether the voltage at the relay contact corresponds to the switching condition.

4.14 Battery Monitoring

Babylog has a rechargeable Nicd battery for power failure alarms.

The battery is recharged automatically during operation and its charge checked periodically.

An error message is displayed if the voltage is too high or too low.

4.15 Flow Measurement Monitoring (Babylog 8000/ Babylog 8000 plus)

During operation, the flow sensor is checked for correct functioning, freedom of damage and intact contacts.

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Function description Babylog 8000

5 Alarms, Cautions and Advisory Messages

The alarm structure of the Babylog has three priority levels:

Alarm - Immediate action required.

Caution - Checking required.

Advisory - Information for the operator.

The priority level is indicated by the different tone sequences of the individual audible alarm.

5.1 Message Display

When an alarm occurs the corresponding message is displayed as plain text message in a window of the display. The message can be canceled momentarily by pressing the Reset/Check key (or OK key as of software version 5.n). After a certain time out, the message appears again if its cause still exists.

If several alarms have occurred simultaneously, the highest-level alarm is shown on the display. Other alarms will be queued. A message whose cause no longer exist will not be displayed any more.

5.2 Display and Menu

The display shows parameters and text messages. The functions of Babylog are set with keys and potentiometers.

The screen is separated into different areas:

Grafic field

Menü line

Measurement field

Fig. 7: Screen display structure

Status field

 The graphics field displays real-time curves.

 The measured-value field displays monitoring parameter in digital representation.

 The status field displays the operating mode and other status information.

 The menu line displays the current function of the keys below the screen.

In some cases, the graphics and measured-value fields are combined to form one large field.

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Function description Babylog 8000

5.2.1 Babylog 8000/Babylog 8000 SC with LC Display

The Monitoring/Mode key and the six keys below the LC display are used for the menu. The Monitoring/Mode key toggles between the two main menus, the monitoring menu and the mode menu. This works from any menu status always reaching the basic status of the other main menu. The function of the keys depends on the respective menu status and is indicated in the menu line of the display by an abbreviation or a symbol.

5.2.2 Babylog 8000/Babylog 8000 plus with EL Display

The key "Vent. Mode" activates the menu for the ventilation modes. The key "Vent. Option" activates the menu for the additional functions of the ventilation modes.

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Function description Babylog 8000

6 Function of the Control Elements

The control elements comprise the potentiometers (rotary knobs) and the keys.

6.1 Potentiometers (Rotary Knobs)

6.1.1 Fraction of inspired O2 (O2 vol.%)

This potentiometer is used to set the fraction of inspired O

to a value between 21 vol.% and 100 vol.%.

2

The adjusted value becomes effective immediately.

6.1.2 Inspiratory time (T

)

I

This potentiometer is used to set the inspiratory time to a value between 0.1 s and 2 s. The adjusted value becomes effective at the end of the current respiratory cycle.

6.1.3 Expiratory time (T

)

E

This potentiometer is used to set the expiratory time to a value between 0.2 s and 30 s. The adjusted value becomes effective at the end of the current respiratory cycle.

6.1.4 Inspiratory flow (Insp. Flow)

This potentiometer is used to set the inspiratory flow to a value between 1 L/min and 30 L/min. The adjusted value becomes effective immediately.

6.1.5 Inspiratory pressure limit (P

insp

)

This potentiometer is used to set the inspiratory pressure limit to a value between 10 mbar and 80 mbar. A value above 40 mbar must be confirmed by pressing the Reset/Check key (or OK key as of software version 5.n). A message is displayed. This pressure limit is also effective when a manual breath is applied. The adjusted value becomes effective immediately.

6.1.6 PEEP/CPAP

This potentiometer is used to set the end-expiratory pressure for controlled ventilation or to set the continuous positive airway pressure for spontaneous breathing to a value between 0 mbar and 15 mbar (or 25 mbar as of software version 4.n). A value above 8 mbar must be confirmed by pressing the Reset/Check key (or OK key as of software version 5.n). A message is displayed. The adjusted value becomes effective immediately.

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Function description Babylog 8000

6.2 Keys

6.2.1 CPAP

Pressing this key will activate the CPAP mode. The current respiratory cycle is stopped before a new mode becomes active (for example, IPPV/IMV). This key is protected against unintentional operation by a software-controlled locking. After power-on, Babylog will automatically enter the most recent mode selected.

6.2.2 IPPV/IMV (CMV) (up to software version 4.n)

Pressing this key will activate the controlled ventilation mode. This key is protected against unintentional operation by a software-controlled locking. If CPAP was set before, the first mandatory breath is applied after the last expiratory phase has been completed (zero expiratory flow) or after a zero flow has been measured at the Y-piece for one second.

The CPAP and IPPV/IMV keys deactivate each other. The selected ventilation mode is indicated by a green LED on the respective key.

6.2.3 Man. Insp.

Pressing this key will apply a breath at the set inspiratory flow rate and the set pressure limit (Pinsp). This breath is stopped when the key is released or when a fixed time limit of 5 s is reached. The next manual or mandatory breath can only be applied after an expiratory phase (IPPV/IMV) has been completed. If a manual breath is stopped by the time limit, the next mandatory or manual breath can only be applied after a fixed time-out (5 s).

6.2.4 2-min Silence

Pressing this key will silence the audible alarm for 2 minutes. This status is indicated by the yellow LED on the key. Pressing the key again within the silence time will reactivate the audible alarm.

6.2.5 Reset/Check (OK)

Pressing the Reset/Check key (or OK key as of software version 5.n) will confirm or cancel text messages shown on the display. The message currently shown on the display will be cancelled and the audible alarm will be silenced.

Pressing the key for a longer period of time (approx. 2 s) will start a display test and an audible alarm generator test.

6.2.6 Backlight On/Off (Babylog 8000/8000 SC with LC Display)

Pressing this key will switch the LCD backlight on or off.

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Function description Babylog 8000

6.2.7 "Cal. Config." (as of software version 5.n)

Pressing this key will activate the calibration mode.

6.2.8 Keys

The keys below the display have no fixed function. Their function depends on the operating status of the menu.

Additional Key on the Operator Panel

This key has not been assigned a function yet. It is reserved for future extensions.

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Function description Babylog 8000

7 Cold Start/Warm Start Behavior

A distinction is made between an intentional switch-off with the power switch and a power failure. If a power failure is recognized, the position of the low voltage contacts of the power switch is evaluated.

7.1 Cold-Start Behavior

When Babylog is switched off, all set parameters and data on the power switch state are stored. When switching on the Babylog, this information is reloaded and a "cold start" is carried out. Babylog initializes, carries out its function tests, indicates the results of these tests, and starts ventilation.

7.2 Warm-Start Behavior

A "warm start" is carried out after a power failure. Babylog does not carry out a self-test, but starts ventilation immediately. It continues to work with the previously set parameters. A visible and audible alarm is active during power failure.

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Function description Babylog 8000

8 Description of Pneumatic Functions

8.1 Gas Supplies

AIR and O2 flow through the filters F 1.1 and F 1.2 and the check valves D 1.1 and D1.2 to the pressure regulators DR 1.1 and DR 1.2 which regulate the gases to a constant system pressure.

From the pressure regulators DR 1.1 and DR 1.2 the gases flow to the mixing and flow-control unit. The gas mixture created there flows through the inspiratory line to the patient.

AIR and O

are taken downstream of the pressure regulators DR 1.1 and DR 1.2 and delivered to the

2

solenoid Y 1.1. If one of the gases fails, this solenoid switches over to the other one.

If the power supply is interrupted or if a stenosis 2 situation has occurred, solenoid Y 1.2 switches over to emergency venting.

The gas for O

calibration flows through solenoid Y 1.3.

2

The gas required to control the ejector flows through solenoid Y 1.4.

F1.1

AIR

DR1.1

1

To mixing and flow-control unit

D1.1

DR1.2

2

To mixing and flow-control unit

O

D1.2

2

F1.2

Y1.1

Y1.5

Y1.2

6

Y1.3

3

4

Y1.4

5

Fig. 8: Compressed-gas connection

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Function description Babylog 8000

8.2 Controlled Ventilation

A continuous flow of gas is delivered to the Y-piece through the inspiratory line. The fraction of inspired O is measured at the O

sensor S 3.1 through the open pneumatic valve Y 3.1. Safety valve Y 3.3 prevents

2

overpressure in the ventilation system, for example, if the expiratory line is blocked.

F3.1

D3.1

Y3.2

S3.1

Y3.3

Insp.

Y3.1

R3.1

3a

10 11a

Fig. 9: Inspiratory Block

8.2.1 Inspiration

2

The PEEP control valve 4 triggers the expiratory valve Y 5.1 causing it to close the expiratory side. The continuous flow of gas is delivered to the patient’s lung. The airway pressure is measured by the two relative pressure sensors S 6.3 and S 6.4. The inspiratory pressure limit is controlled by expiratory valve Y 5.1.

E

P

E

P

S6.3

S6.4

6 Pressure measurement

R1.1

Y4.1

Y5.1

4 PEEP/PIP valve

5 Expiratory valve

Fig. 10: Expiratory valve, PEEP/PIP valve, and pressures measurement

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Function description Babylog 8000

8.2.2 Expiration

The PEEP control valve Y 4.1 vents the control pressure at the expiratory valve Y 5.1. The expiratory valve Y 5.1 opens the ventilation system. Expiration takes place through the open expiratory valve Y 5.1. The ejector, which is driven through the open solenoid Y 1.4, supports expiration.

6 Pressure measurement

From Y1.4

R1.1

E

P

E

P

S6.3

S6.4

Y4.1

Y5.1

4 PEEP/PIP valve

5 Expiratory valve

Fig. 11: Venting

8.2.3 PEEP

The PEEP/PIP valve is a pressure regulating valve which generates a control pressure of -19 mbar to +80 mbar. Control pressures are used to trigger the inspiratory and expiratory valves in order to deliver the peak inspiratory pressure (PIP) during inspiration and the positive end-expiratory pressure (PEEP) during expiration to the patient-side valves.

An ejector integrated into the valve allows a negative control pressure of up to -19 mbar.

8.2.4 CPAP

The control pressure generated by the PEEP control valve Y 4.1 acts on the control side of the expiratory valve Y 5.1 and builds up a continuous positive airway pressure in the ventilation system.

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Function description Babylog 8000

9 Measurement of the Ventilation Parameters

9.1 O

Measurement

2

The O2sensor continuously measures the fraction of inspired O2through the open pneumatic valve Y 3.1.

F3.1

D3.1

Y3.2

S3.1

Y3.3

Insp.

Y3.1

R3.1

3a

Fig. 12: Measurement of the fraction of inspired O

10 11a

.

2

An automatic two-step calibration is carried out at 24-hour intervals.

AIR is supplied to the pneumatic valve Y 3.1 through solenoids Y 1.1, Y 1.2, and Y 1.3. The pneumatic valve Y 3.1 closes the connection between the O valve Y 3.2 is opened while, at the same time, the O

sensor S 3.1 and the inspiratory line. The pneumatic

2

sensor is purged with AIR through the restrictor

2

R 3.2 for approximately 2.5 minutes.

Then, purging with O

is carried out in the same way. After calibration, the solenoid Y 1.1 switches back to

2

AIR, the solenoid Y 1.3 closes, the pneumatics valve Y 3.2 closes, too, and the pneumatics valve Y 3.1 reconnects the O

sensor to the inspiratory line.

2

9.2 Measurement of the Airway Pressure

Due to the continuous flow, the inspiratory measurement results in a value that is higher than the value measured at the Y-piece. Since an expiratory measurement results in a value which is too low, an average value is calculated from the measured values of the relative pressure sensors and displayed on the screen.

A bactericidal metering pipe prevents contamination of the pressure sensor with expiratory gas.

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Function description Babylog 8000

9.3 Pneumatics Control PCB

The Pneumatics Control PCB is the output unit of the CPU 68000. It receives serial data from the I/O PCB and triggers the corresponding valves.

Further functions of Pneumatics Control PCB: voltage supply to the patient system heater, power supply to the PEEP/PIP valve.

Motherboard

Control signals

Seriel parallel converter

Relay control

Input logic

Pneumatic analog PCB

Current and amplifier monitoring

Output

Valve voltage

PEEPvoltage

PEEP valve

Valve block AIR

Valve block O2

Fig. 13: Block diagram of the Pneumatics Control PCB

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Input block

Pneumatic

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Function description Babylog 8000

9.4 Pneumatics Analog PCB

The Pneumatics Analog PCB controls and monitors the operate voltage and the withstand voltage to the valves. The Pneumatics Analog PCB is installed on the Pneumatics Control PCB.

Current of the valve

Current control

Amplifier control

Fig. 14: Block diagram of the Pneumatics Analog PCB

+ Ref.

Valve voltage

+ Ref.

State of valve

Switch regulator

Fig. 15: Block diagram of the Pneumatics Analog PCB

Stop clock

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Function description Babylog 8000

9.5 Patient System Heater

The patient system heater consists of a heating resistor located at the expiratory-valve connection.

9.6 Pressure Sensor Base PCB

The Pressure Sensor Base PCB has four pressure sensors for the measurement of O

supply pressures and for coordination of the pressure and the O2 measurement signals.

2

Pinsp

9.7 O2 Amplifier PCB

The O2 Amplifier PCB amplifies the sensor signals directly at the sensor.

, P

exp

, AIR and

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Function description Babylog 8000

10 Components of the Electronic Assembly

The electronic assembly consists of the following printed circuit boards and subassemblies:

 Power supply unit

 Motherboard PCB

 CPU 68000 PCB

 I/O PCB

 Flow PCB (Babylog 8000) (optional)

 Monitoring PCB/Watchdog PCB

 Front Adapter PCB

 Front Controller PCB (Babylog 8000/Babylog 8000 SC with LC display )

 Front PCB (Babylog 8000/Babylog 8000 plus with EL Display)

 Display PCB (Babylog 8000/Babylog 8000 SC with LC display )

 EL display (Babylog 8000/Babylog 8000 plus with EL display)

 Potentiometer field

 Display field

 Communication PCB (optional)

 Interface PCB (optional)

10.1 Power Supply Unit

The power supply unit supplies Babylog with the following voltages:

 +5 V

 +15 V

 –15 V

 +27 V

The power supply unit comprises the mains connection, the ON/OFF switch, and the fuses.

10.2 Motherboard PCB

All electrical connections between the individual printed circuit boards are led through the Motherboard PCB. Cable connections go to the front panel, to the pneumatic assembly, and to the rear panel, which contains the rechargeable battery, the fan, the loudspeaker, and the flow-sensor connection.

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Function description Babylog 8000

10.3 CPU 68000 PCB

The CPU 68000 PCB comprises the following components: 68000 CPU, EPROM, RAM, time-keeper RAM, address decoder, multi function peripheral (four 8-bit timers, RS 232 interface, 8-bit I/O port), DTACK and bus error generator, watchdog, power-on reset, interrupt controller, bus controller, and bus interface.

The CPU 68000 PCB is clocked with 8 MHz. If the "communication" conversion kit is installed, the clock frequency is increased to 16 MHz.

Bus-Interface

Control-Bus

Adreß-Bus

Digital-Bus 68000

Daten-Bus

Adreß-Bus

Seriell

Powerfail

I/O

Digital I/O

Status CPU

Reset

Interrupt

Power-onReset

Interrupt Controller

BusController

Optionsschalter

Adressdecoder

EPROM

RAM

Time Keeper RAM

Multi Function Peripheral

16 MHz 8 MHz

CPU 68000

Coprozessor

DTACK-, Bus-ErrorGenerator

Watchdog

12 MHz

Fig. 16: Block diagram of the CPU 68000 PCB

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Function description Babylog 8000

10.4 I/O PCB

The I/O PCB measures the analog signals O2 concentration, inspiratory pressure, expiratory pressure, AIR supply pressure, and O

supply pressure, and triggers the loudspeaker and the PEEP/PIP valve.

2

DTACK

Control bus

Adress bus

Digital bus 6800

Data bus

I/O connections

DTACK generator

Adress decoder

Current of the PEEP valve

Loud speaker

seriel valve datas

Muxer

Fig. 17: Block diagram of the I/O PCB

Control-Bus

Adreß-Bus

Daten-Bus

S & H

PIO

Parallel/seriell Converter

Sound generator

D

A

D

U

A

I

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Function description Babylog 8000

10.5 Flow PCB (Babylog 8000/Babylog 8000 plus) (optional)

The Flow PCB in Babylog 8000/Babylog 8000 plus measures the flow. It provides the following function blocks: sensor bridges with sensor amplifiers, analog-to-digital converter, microprocessor Z80 minimum system, Z80-68000 bus interface.

Adress decoder

6 MHz

DTACK

Control bus

Adress bus

Digital bus 68000

Data bus

Flow sensor

Analog 1

Analog 4

Status flow

Control bus

Adress bus

Data bus

DTACK generator

Adress decoder

Control bus

Adress bus

Data bus

System reset

Muxer

S & H

EPROM 64 k / 32 k

RAM 8 k / 2 k

Dual-PortRAM

A

Z80 CPU

Timer

Watchdog

PIO

D

Fig. 18: Block diagram of the Flow PCB

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Function description Babylog 8000

10.6 Monitoring PCB

The Monitoring PCB measures and monitors all measurement and status signals. The Monitoring PCB compares these signals with the signals from the CPU 68000. If an error occurs, the Monitoring PCB switches off the valves, activates the audible alarm generator, and resets the CPU PCB.

A Z80 microprocessor (minimum system) controls the Monitoring PCB. The Monitoring PCB communicates with the CPU 68000 via a bus interface.

10.6.1 Measurement of Analog Signals

concentration

 O

2

 Potentiometers (O

 Pressure P

insp

, Vinsp, TI, TE, P

2

, PEEP/CPAP)

insp

 System temperature

 Supply voltages (potentiometer reference, rechargeable battery, GNDA, GND reference, 27 V)

 Valve voltage

10.6.2 Measurement of Digital Inputs

 STATUS CPU 68000 (reset)

 STATUS flow (reset)

 STATUS I/O (printed circuit board is available)

 STATUS valves (current and drive monitoring on the Pneumatics Analog PCB)

 Powerfail

 Position of power switch

10.6.3 Measurement of Digital Outputs

 Alarm LEDs (2 LEDs on the Display PCB)

 Flow test 1 and 2 (for Flow PCB)

 Switching on of valve relays K1 and K2 (voltage supply to valves and PEEP/PIP valve on the

Pneumatics Control PCB)

 CPU PCB reset

 7-segment status display for error messages

 Standby audible alarm generator

 Loudspeaker monitoring via microphone

 Battery charging and testing circuit

 Test of the supply voltages +5 V, +15 V, –15 V (Display PCB)

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Function description Babylog 8000

DTACKQ

Control bus

Adress bus

Digital bus 68000

Data bus

Analog Input

Bus interface

S & H

(Filter)

INTQ DTACKQ generator

Adress decoder

Control bus

Adress bus

Adress decoder

EPROM 64 k

RAM 8 k

DualPor tRAM

PIO

Z80-Bus

4 MHz

Z 80 CPU

Timer

Watchdog

Watch dog PCB

A

PIO

D

Status display

Digital Input

I/O connections

Fig. 19: Block diagram of the Monitoring PCB

Block diagram of the Watchdog PCB of the Monitoring PCB (in new boards the Watchdog PCB is integrated into the Monitoring PCB).

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Function description Babylog 8000

voltages

+

-

U

Ref

sound decoder

Signal sound generator monitoring

rechargeable battery

Alarm LED power

Fig. 20: Block diagram of the Watchdog PCB

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Function description Babylog 8000

10.7 Front Adapter PCB

The Front Adapter PCB connects the CPU 68000 to the front panel. The front panels provides the control and display elements.

The Front Adapter PCB reduces the 16-bit data bus to 8 bits, generates control signals for the front panel, and controls the LC display (VIDEO RAM and LCD controller) or the EL display.

The power supply and the analog signals are led from the Motherboard PCB to the front panel through the Front Adapter PCB.

DTACKQ

Control bus

Adress bus

Digital bus 68000

Data bus

DTACK generator

Adress decoder

Daten-Bus (16 bit)

seriell Datas to LC display

LCDController

DualPor tRAM

Adress and Control bus

Frontcontroller

Data bus (8 bit)

Ansteuerung Alarm LED

I/O connections

analog current power

Potentiometer monitoring

Fig. 21: Block diagram of the Front Adapter PCB

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Function description Babylog 8000

10.8 Front Controller PCB (Babylog 8000/Babylog 8000 SC with LC Display)

The Front Controller PCB reads in the keys of the potentiometer and display field, controls the LEDs of the potentiometer and display field, powers the LC display with operating voltage (contrast), controls the LC display backlight, and generates the control signal for the bargraph.

Control bus and Adress bus

Data bus

U

B

D

A

key port

LED driver

Amplifier Bargraph

U

Ref

Contrast adjustment of LC display

DC

AC

Test A/D converter

voltage for display illumination

Keys of the front panel and options switches

LEDs of the front panel

LC display

Alarm LEDs

Bargraph of the front panel

A

D

6x

Adress decoder

Potentiometer of the front panel

Fig. 22: Block diagram of the Front Controller PCB (Babylog 8000/8000 SC with LC display)

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Function description Babylog 8000

10.9 Front PCB (Babylog 8000/Babylog 8000 plus with EL Display)

The Front PCB reads in the keys of the potentiometer and display field, controls the LEDs of the potentiometer and display field, powers the EL display with operating voltage (contrast), and generates the control signal for the bargraph.

Control bus und Adress bus

Data bus

UB

DC

key port

LED driver

Amplifier Bargraph

URef

+5 V, +12 V

EL display, complete

DC

EL display converter

Cable of EL display

EL display

Keys and option switches of the front panel

LEDs of the front panel

Alarm LEDs

Bargraph of the monitoring field

Test A/D-Wandler

A

D

Adress decoder

Fig. 23: Block diagram of the Front PCB

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Potentiometer of the potentiometer field

6x

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Function description Babylog 8000

10.10 Display PCB (Babylog 8000/Babylog 8000 SC with LC Display)

The Display PCB contains the control electronics for the LED array of the bargraph.

Data bus

Chip Select

Adress bus

RAM

Modul 06

Fig. 24: Block diagram of the Display PCB

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Function description Babylog 8000

10.11 EL display (Babylog 8000/Babylog 8000 plus with EL Display)

The EL display (Electro Luminescence Display) consists of the EL display, the EL display converter, and the EL display connecting cable. The EL display displays the signals and other information. The EL display converter generates the (200-240 V a.c.) voltage for the luminescence voltage of the EL display. The EL display and the converter are ”matched”.

EL display

EL display connecting cable

EL display converter

Fig. 25: Components of EL display

pn 45363667

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Function description Babylog 8000

10.12 Potentiometer Field

The Potentiometer Field comprises the following components:

 6 potentiometers (O

 9 LEDs (O

vol.%, TI, TE, Insp. Flow , P

2

vol.%, TI, TE, Insp. Flow , P

2

, PEEP/CPAP, CPAP, IPPV, reserve)

insp

, PEEP/CPAP)

insp

 3 keys (CPAP, IPPV, reserve) (Vent. Mode, Vent. Option, reserve as of software version 5.n

10.13 Display Field

The display field contains the following components:

 11 keys (silence, reset, man./insp., menu, keys 1 to 6, light). The "light" key is only available on

Babylog 8000 with LC display. The key signals are read in via the Front Controller PCB or the Front PCB.

 LED array of the bargraph. The LED array is controlled via the Display PCB.

 7 LEDs (warning (yellow), mode, monitoring, silence, triggers 1 to 3). The LEDs are controlled via the

Front Controller PCB or the Front PCB.

 2 red alarm LEDs. The LEDs are controlled via the Monitoring PCB/Watchdog PCB.

50

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_F61733XXT01.fm

Function description Babylog 8000

10.14 Communication PCB

The Communication PCB controls an external printer, a computer, and an analog recorder. The Communication PCB is equipped with an RS232 interface, two 12-bit D/A outputs, and one digital trigger output. All outputs are electrically isolated from the electronics. Software version 3.00 or higher, a CPU PCB with 16 MHz (the CPU PCB with 8 MHz was standard until end of 1992) and the Interface PCB with outputs on the rear panel are minimum requirements for operation.

System connector

Analog

Output

A

D

Trigger

RS 232

Nurse call

2,5 kV electrical isolation

DTACK

Register

Parallel/seriell

converter

generator

Adress

decoder

DC

MFP*

EEPROM

*MFP=Multi Function Prozessor

DTACK

Control bus

Digital bus 68000

Adress bus

Data bus

I/O connections

Fig. 26: Block diagram of the Communication PCB

_ _Printed on_18.05.05_F61733XXT01.fm

Dräger Medical AG & Co. KGaA 6173.3

51

Function description Babylog 8000

10.15 Interface PCB

The Interface PCB is a passive printed circuit board with the following connections:

 Flow-sensor cable

 2 analog outputs

 Trigger output

 RS 232

The Interface PCB is required for the optional communication function.

+15 V

X 1 / 16

X 1 / 8

X 1 / 12

X 1 / 5

X 1 / 4

X 1 / 14

X 1 / 15 X 1 / 16

X 8 / 1 X 8 / 2

X 8 / 3 X 8 / 4

X 8 / 5 X 8 / 6

X 8 / 7 X 8 / 8

X 8 /15 X 8 / 16

V 5

V 6

V 1

V 2

+15 V

V 3

V 4

+15 V

R 1

X 4

X 5

X 6

X 3 / 2

X 3 / 3

X 3 / 5

X 3 / 7 X 3 / 8

X 3 / 4 X 3 / 6 X 3 / 1

X 7 / 1 X 7 / 9

X 7 / 2

X 7 / 10

X 7 / 3 X 7 / 11

X 7 / 4 X 7 / 12

X 7 / 8 X 7 / 15

Analog 1

Analog 2

Trigger

RS 232

Flow-Sensor

Fig. 27: Interface PCB

52

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_F61733XXT01.fm

Function description Babylog 8000

11 Sensors

11.1 Pressure Sensors

The pressure sensors function according to the piezoresistive principle. An approximately 4 mm into 4 mm silicon chip has 4 ion implanted resistors. The silicon chip is also equipped with a pressure diaphragm.

11.2 Y-Piece with Flow Sensor (Babylog 8000/Babylog 8000 plus)

The Y-piece with integrated flow sensor is used in pediatric respiratory gas systems. This Y-piece connects the respiratory gas hoses of Babylog 8000/Babylog 8000 plus to the patient catheter connection.

Hot wire flowmeter

Hot wire flowmeter for direction recognition

Inspiration

Exspiration

Fig. 28: Flow sensor

The flow sensor works according to the hot-wire flowmeter principle. It has an additional measuring wire for direction recognition.

_ _Printed on_18.05.05_F61733XXT01.fm

Dräger Medical AG & Co. KGaA 6173.3

53

Function description Babylog 8000

11.2.1 Measuring Principle of the Flow Measuring Bridge

The flow sensor incorporates two hot-wire flowmeters. A separate wire is used for direction recognition. Both wires are evaluated on the Flow PCB by two separate measuring channels.

U

B

V 7

Flow test

Comparator

12 Bit

D 24

R 54

RDR

Hot wire

Hot wire glowing

R 72

R 70

PI regulator N 7

+

Umeß

-

Fig. 29: Principle diagram of the flow measuring bridge

The measuring bridge comprises the resistors R 54, R 72, R 70, and the measuring wire of the sensor.

The measuring wire is kept at a constant resistance. This means that the amount of heat dissipated by the gas flow has to be readjusted. As system deviation the voltage passes through the node R 54/R72 and the measuring wire R 70. If the voltage is adjusted to "0", the current flowing through the measuring wire and the R70 is a measure for the heat dissipated. The controllable power source is made with V7. N7 is a controller with PI behavior. To adjust the bridge a current can be injected via the D/A converter D 24 into the node R54/R72. The current through the bridge is changed such that the wire begins to glow. Burning out of the wire is prevented by a current limiter. The current limiter compares the voltages and switches the current source off, if required. Current limitation is effected through the comparator which is connected to the input of V7. The current through the flow measuring bridge is changed for test purposes. R 70 is a current measuring resistor (four-wire measurement) which measures the heating current (proportional voltage).

54

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_F61733XXT01.fm

Function description Babylog 8000

11.3 O2 Sensor

The O2 sensor is a double cell which functions according to the fuel-cell principle, that is, it is an electrochemical cell which generates a voltage by means of an ion current. The cell consists of a capsule which incorporates electrolytes, lead anodes and two gold cathodes with Teflon diaphragm.

cathode 1

O2

cathode 2

Fig. 30: O

sensor cell

2

-

Plastic housing

Alkali-Elektrolyt

anode

The oxygen to be measured diffuses through the Teflon diaphragm, undergoes a chemical reaction at the gold cathode and produces lead oxide and water at the lead anode. During this chemical process an electric voltage is generated which is proportional to the oxygen partial pressure. The gold cathodes are negative, the lead anode is positive. The internal resistance is determined by the surface of the electrodes, the oxygen diffusion velocity, and the distances. Under normal condition, the internal resistance is 700 ohms.

Like most chemical processes, this process is also temperature-dependent. Therefore, compensation resistors are connected in parallel to the sensor. These resistors correct the measuring voltage in relation to the internal resistance. Two voltages are generated which are identical within specified tolerances. The voltages are compared to each other. The two gold cathodes are arranged separately. The two voltages do not influence each other. If one gold cathode fails, the other carries out the measurement. In this case, the electronics would report a malfunction.

_ _Printed on_18.05.05_F61733XXT01.fm

Dräger Medical AG & Co. KGaA 6173.3

55

Function description Babylog 8000

56

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_F61733XXT01.fm

Replacing Non Repairable Items

57

58

Replacing Non-Repairable Items Babylog 8000

1 Important Information

Follow the instructions in this manual and carefully read and observe all statements following a warning or info symbol. If you ignore the warning statements, this may lead to personal injury and/or device damage.

Non-repairable items should only be replaced by qualified service personnel.

Before removing the rear panel, unplug the power plug from the mains supply and disconnect the device from the central gas supply.

Observe antistatic precautions prior to and during any corrective procedure.

After performing any repair or inspection on medical devices, carry out a final check before returning the devices to normal use.

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

59

Babylog 8000 Replacing Non-Repairable Items

2 Cleaning or Replacing the Cooling Air Filter Every 4 Weeks

• Pull out the cooling air filter 1 from its mount in the rear panel.

• Insert a new cooling air filter or wash the old one in warm water with a few drops of dish-washing liquid. Dry well.

• Insert the cooling air filter 1 into the mount (make sure it is free of folds).

1

Fig. 1: Cooling Air Filter

_ _Printed on_18.05.05_GBK61733XXV01.fm

60

Dräger Medical AG & Co. KGaA 6173.3

Replacing Non-Repairable Items Babylog 8000

3 Replacing the O2 Sensor Capsule

• Remove the slotted-head screws 1 in the cover on the right-hand side and carefully pull the cover out.

• Pull the spent O

• Insert the new O

sensor capsule out of its mount.

2

sensor capsule into the mount (the ring-shaped conductors must show towards the

2

cover).

• Push the cover in place and secure it with the screws 1.

• Calibrate the O

sensor manually.

2

1

Fig. 2: O

Sensor Capsule

2

3.1 O2Sensor Calibration

 Calibration is carried out automatically every 24 hours during operation.

 Calibration should be carried out manually after replacement of the sensor capsule.

 Calibration can be carried out manually at any time.

3.2 Calibrating the O2Sensor After Replacement

• Press the key 2 in the main menu.

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Dräger Medical AG & Co. KGaA 6173.3

61

Babylog 8000 Replacing Non-Repairable Items

2

D

Fig. 3: Front View

The following display appears on the LCD:

S p e c i a l f u n k t i o n s

V I V E C a l

• Press the “Cal” key.

The following display appears on the LCD:

s e n s o r c a l i b r a t i o n

Flow

F i O 2

IPPV IMV

C o n f i g

IPPV IMV

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Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Replacing Non-Repairable Items Babylog 8000

• Press the “FiO2” key.

IPPV

25 mbar

O2c a l i b r a t i o n

Meas switched off

27 %

. 0 mbar

IPPV IMV

IMV

O2-Cal

Meas Values Trend

After approx. 5 min, the display “O2 Cal” disappears from the status field and calibration is completed.

The message in the screen can be canceled as follows:

• Press the Reset Check key.

!

3.3 Disposing of the O2 Sensor Capsule

The O2 sensor capsule is special waste. Dispose of according to local waste disposal regulations.

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

63

Babylog 8000 Replacing Non-Repairable Items

4 Replacing the Lip Seals Every 2 Years

• Lift the toggle 1 and take out the expiratory valve.

D

1

Fig. 4: Removing the Expiratory Valve

• Use, for example, a spherical-head 2.5 mm screwdriver to remove the old lip seals 2. Insert the new lip seals and make sure they fit properly.

D

2 2

2

Fig. 5: Location of the Lip Seals

• Re-mount the expiratory valve. To do so, lift up the toggle and place the expiratory valve to the front using the guide rods.

• Lock the expiratory valve with the toggle 1.

64

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Replacing Non-Repairable Items Babylog 8000

5 Replacing the NiCd Battery (Power Failure Alarm) Every 2 Years

• Remove the screw 1 on the fan/loudspeaker cover.

1

Fig. 6: Opening the Loudspeaker Cover

• Gently lower the cover 3.

• Disconnect the cable connection 2 and place the cover 3 aside.

• Remove the screws 4 on the battery mount.

4

2

3

Fig. 7: Removing the Loudspeaker Cover

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

65

Babylog 8000 Replacing Non-Repairable Items

• Remove the battery 5 and install a new one.

5

Fig. 8: Replacing the Battery

• Re-assemble the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC. The battery for power failure alarm is recharged automatically during operation.

After replacing the battery, allow the device to operate for at least half an hour in order to sufficiently charge the battery.

No acoustic alarm will sound in the event of power failure if the battery is not sufficiently charged. Risk of severe injury or death. Allow the device to operate for at least half an before clinical application.

66

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Replacing Non-Repairable Items Babylog 8000

6 Replacing the Pressure Reducer Every 6 Years

• Disconnect the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC from the mains supply.

• Disconnect the gas supply hoses from the central gas supply/gas cylinder.

• Disengage the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC from the trolley. To do so, loosen

the knurled nuts 1 on the rear panel.

1 1

Fig. 9: Location of the Knurled Nuts

Fig. 10: Disengaging the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

67

Babylog 8000 Replacing Non-Repairable Items

• Remove the screws 2 from the two side panels.

2 2 2 2

Fig. 11: Left and Right Panel

• Remove the bottom screws 3 from the fixing straps on the left and right panel.

3 3

Fig. 12: Removing the Fixing Straps

68

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Replacing Non-Repairable Items Babylog 8000

• Remove the bottom screws 4 from the fixing straps on the rear panel.

4

Fig. 13: Rear Panel of the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC

• Gently lift the top part and place it next to the bottom part.

• Remove the screws 5.

• Remove the gas supply connection plate 6.

• Remove the two filters and the gasket. Loosen the screws 7 on the supply block.

77

55

7 7

Fig. 14: Supply Block

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

6

69

Babylog 8000 Replacing Non-Repairable Items

• Slightly tilt the supply block 8. Make sure not to damage the hoses or the printed circuit boards.

8

Fig. 15: Pneumatic Assembly of the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC

Tilting the supply block excessively will cause damage to the hoses and/or printed circuit boards. Do not tilt the supply block more than necessary.

70

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Replacing Non-Repairable Items Babylog 8000

• Remove the fastening screws 9 from the pressure reducers.

• Pull out the pressure reducers.

9 9 9 9

Fig. 16: Supply Block

• Replace the pressure reducers 10 for AIR and O 12 (part number M23154).

10

11

Fig. 17: Pressure Reducers

including the O-rings 11 (part number D19080) and

2

12

• Mount the pressure reducers onto the supply block.

• Mount the supply block.

• Re-insert the gasket and the filters (wire fabric side shows towards inside).

• Mount the gas supply connection plate.

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

71

Babylog 8000 Replacing Non-Repairable Items

• Unlock the pressure reducers by pulling the adjusting rings 1 in direction of A.

• Turn the adjusting rings 1 counterclockwise in direction of B as far as they will go (pressure reducers

will be closed).

A

Air

B

1

O2

Fig. 18: Pneumatic Assembly

• Connect to the air supply only and switch on the Babylog 8000/ Babylog 8000 plus/Babylog 8000 SC.

• Adjust the following parameters: Mode = CPAP; PEEP/CPAP adjuster = 0 mbar; insp. flow = 1 L/min

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Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Replacing Non-Repairable Items Babylog 8000

D

Fig. 19: Air-Supply Test Set-Up

• Carry out the measurement with a manometer and a secretion sightglass at the pneumatics outlet.

• Slowly turn the adjusting ring of the air pressure reducer clockwise. The message “no compressed air” on the LCD disappears.

-0.1

• Set the pressure reducer to 1.7

bar.

• Set the insp. flow adjuster to 30 L/min. The manometer should indicate at least 1.3 bar.

• Disconnect the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC from the air supply and connect it to the oxygen supply.

• Adjust the following parameters: Mode = CPAP; PEEP/CPAP adjuster = 0 mbar; insp. flow = 1 L/min.

D

Fig. 20: O

-Supply Test Set-Up

2

• Carry out the measurement with a manometer and a secretion sightglass at the pneumatics outlet.

• Slowly turn the adjusting ring of the O

pressure reducer clockwise. The message “no oxygen” on the

2

LCD disappears.

_ _Printed on_18.05.05_GBK61733XXV01.fm

Dräger Medical AG & Co. KGaA 6173.3

73

Babylog 8000 Replacing Non-Repairable Items

• Set the pressure reducer to 1.7

-0.1

bar.

• Set the insp. flow adjuster to 30 L/min. The manometer should indicate at least 1.3 bar.

• Lock both adjusting rings by pressing them in direction of the arrows C.

• Make sure that the hose system is free of leaks.

CC

Fig. 21: Locking the Pressure Reducer

• Re-assemble the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC and it return it to service readyfor-use.

74

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXV01.fm

Schematics and diagrams

75

76

Schematics and diagrams Babylog 8000

1 Schematics and Diagrams

3 Inspiratory block

F3.1

Y3.2

S3.1

Y2.10

Y2.2

Y2.1

E

2

O

R2.10

R2.2

R2.1

R3.2

Y3.3

D3.1

Y3.1

9a

12

R1.1

4a

10b

D4.1

Exp.

10a

Y5.1

Y4.1

5 Expiratory valve

5a

4 PEEP/PIP valve

Insp.

6 Pressure

measurement

11

11a

E

10

R3.1

3a

9

Y2.20

R2.20

Y2.12

R2.12

Y2.11

R2.11

S6.4

S6.3

P

6 Valve block

12a

P

E

R3.3

7

8

1a

7a

E

P

S6.1

8a

E

P

6 Pressure measurement

S6.2

1

DR1.1

F1.1

Air

D1.1

2a

2

Y1.1

nc

c

no

DR1.2

D1.2

F1.2

2

O

Y1.5

3

4

Y1.2

n

no

Y1.3

c

6

Fig. 1: Function Diagram of Babylog 8000 „Version 0“

Y1.4

5

1 Gas supply block

Version 0 valid up to serial no. ARDK

(Sep. 91)

incl. spring (25 mbar in Y 3.3)

incl. pressure limiting valve (85 mbar) in

PEEP/PIP valve,

_ _Printed on_18.05.05_GBK61733XXD01.fm

Dräger Medical AG & Co. KGaA 6173.3

77

Babylog 8000 Schematics and diagrams

Hose 2x1.5 Si

Detail Z

bl. 3 lg

glued with silicone

(glue Elastosil

E41/Wacker)

Hose 4x1.5 Si

tr. 20 lg

View V

±1

10

Hose 2x1.5 Si ye.

3 lg

View Y

Hose 2x1 Si

or. 3 lg

rd. 3 lg

Hose 2.7 x 0.65

- PA 11 w M25778

PA tube 6 x 1 bl ye

2 x 1.5 Si tr. ye. bl

2 x 1 Si rd. gn. or

5 x 2 Si tr.

4 x 1.5 Si tr.

235 bl

Detail X

170 ye

-2

1

2

DR1.1

DR1.2

View U

Hose 2x1 Si gn.

10 lg

Air

2

Valve block

O

M 22 286

5

3

Y1.5

Y1.1

30

4

100

40

Y1.4Y1.3

Gas supply block

Y1.2

2

230 ye

20

View X

S6.1

85

68 00 187

60

120

7

Y2.2

Y2.1Y2.11

1a

8a

84 06 810

230

4a

Y2.12

V

X

11a

100 or

S6.4

Z

Pressure

sensors

20

S6.3

Z

2a

U

S6.2

7a

100 rd

20

68 00 187

170

12a

Y2.10

9

8

Y2.20

170 bl.

Y

100

3a

10

9a

11

5a

10b

80 gn

12

50 gn

D4.1

valve

PEEP/PIP

Y1.4

10a

Fig. 2: Tubing Diagram of Babylog 8000 „Version 0“

78

Dräger Medical AG & Co. KGaA 6173.3

70

X

84 01 083

_ _Printed on_18.05.05_GBK61733XXD01.fm

Schematics and diagrams Babylog 8000

Insp.

6 Pressure

measurement

Y3.3

3 Inspiratory block

Y3.2

E

R3.2

F3.1

Y2.10

Y2.2

2

O

R2.10

R2.2

Y3.1

D3.1

9a

9

R3.1

R2.20

R2.12

11

S6.4

S6.3

11a

E

10

Y2.20

Y2.12

6 Valve block

P

E

R3.3

4a

Exp.

12a

12

5 Expiratory valve

5a

4 PEEP/PIP valve

R1.1

Y5.1

10b

10a

Y4.1

Y2.1

R2.1

7

1a

S6.1

S6.2

7a

8a

DR1.1

D1.1

F1.1

Air

E

P

E

P

6 Pressure measurement

8

DR1.2

F1.2

R2.11

Y2.11

2a

2

Y1.1

nc

D1.2

2

O

Y1.2

c

no

Y1.5

3

Y1.3

c

nc

no

6

Fig. 3: Function Diagram of Babylog 8000 „Version 1“

4

Y1.4

nc

5

1 Gas supply block

Version 1 up to ARDL (Oct. 91)

without spring (25 mbar in valve Y 3.3

without Pressure limiting valve (85 mbar) at

_ _Printed on_18.05.05_GBK61733XXD01.fm

Dräger Medical AG & Co. KGaA 6173.3

79

Babylog 8000 Schematics and diagrams

glued with silicone (glue

Elastosil E41/Wacker)

Detail Z

Detail X

170 ye

S6.1

Hose 2x1 Srd. 3 lg

View Y

Hose 2.7 x 0.65

- PA 11 w M 25778

PA tube 6 x 1 bl. ye

2 x 1 Si rd. gn. or

2 x 1.5 Si tr. ye. bl.

4 x 1.5 Si tr.

5 x 2 Si tr.

Hose 2x1 Si

rd. 3 lg

View X

7

Y2.1

1a

Y2.12 Y2.2

Y2.11

2a

X

V

U

S6.4

S6.3

S6.2

7a

8a

11a

Z

100 rd

sensors

Pressure

Y2.10Y2.20

Y

12a

100 or

9

8

170 bl.

100

Hose

2x1.5 Si

bl. 3 lg

Hose 4x1.5 Si tr.

20 lg

View V

±1

10

Hose

2x1.5 Si

ye. 3 lg

View U

Hose 2x1 Si gn.

10 lg

-2

2

Gas supply block

Air

Valve block

2

O

230 ye

M 22 286

20

68 00 187

85

68 00 187

150

60

20

D4.1

84 06 810

84 01083

X

230

84 05363

4a

Y4.1

10a

valve

PEEP/PIP

235 bl.

1

DR1.1

DR1.2

Y1.5

4

100

Y1.1

Y1.2

5

3

2

40

Y1.4Y1.3

Fig. 4: Tubing Diagram of Babylog 8000 „Version 1“

3a

20

5a

70

10

9a

11

10b

12

50 gn

80

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXD01.fm

Schematics and diagrams Babylog 8000

Insp.

6 Pressure

measurement

R3.1

R2.20

R2.12

R2.11

11

10

Y2.12

Y2.11

11a

4,8mL

Y2.20

S6.4

S6.3

P

E

D 4.1

R3.3

6 Valve block

Y3.3

3 Inspiratory block

Y3.2

E

2

O

S3.1

F3.1

Y2.10

Y2.2

Y2.1

R3.2

D3.1

R2.10

R2.2

R2.1

Y3.1

9a

9

Exp.

12

12a

Y5.1

10b

10a

Y4.1

R1.1

4a

5 Expiratory valve

5a

4 PEEP/PIP valve

8

7

1a

E

P

7a

S6.1

E

P

6 Pressure measurement

S6.2

DR1.1

D1.1

F1.1

Air

DR1.2

F1.2

2a

4

3

Y1.1

nc

D1.2

2

O

Y1.2

c

no

nc

Y1.5

Y1.3

c

nc

no

6

Fig. 5: Function Diagram of Babylog 8000 „Version 2“

Y1.4

nc

5

1 Gas supply block

Version 2 (as of 1992)

without spring (25 mbar in valve Y 3.3)

without Pressure limiting valve (85 mbar) in

PEEP valve

_ _Printed on_18.05.05_GBK61733XXD01.fm

Dräger Medical AG & Co. KGaA 6173.3

81

Babylog 8000 Schematics and diagrams

Hose 2x1 Si

View Y

or. 3 lg

Hose 2x1 Si

rd. 3 lg

Hose 2.7 x 0.65

- PA 11 w M 25778

PA tube 6 x 1 bl. ye

2 x 1 Si rd. gn. or

2 x 1.5 Si tr. ye. bl.

4 x 1.5 Si tr

5 x 2 Si tr.

Detail Z

glued with silicone

(glue Elastosil

E41/Wacker)

±1

Hose 2x1.5 Si

bl. 3 lg

Hose 4x1.5 Si tr.

20 lg

View V

10

Hose

2x1.5 Si

ye. 3 lg

235 bl

Detail X

170 ye

1

85

S6.1

View X

78

Y2.2

Y2.1Y2.11

1a

2a

U

S6.2

8a

7a

84 06 810

68 00 187

130

Y2.12

S6.3

Z

X

S6.4

11a

12a

Z

100 or

sensors

Pressure

V

100 rd

230

Y2.10Y2.20

9

Y

20

100

170 bl

5a

10

3a

9a

11

10b

X

12

View U

gn. 10 lg

Hose 2x1 Si

-2

2

Gas supply block

DR1.1

DR1.2

Y1.2

5

3

2

Y1.5

Y1.1

M 22 286

Valve block

4

Y1.4Y1.3

Air

2

O

230 ye

2030

100

68 00 187

40

120

40

8409111

60gn

110

60

4a

D4.1

Y1.4

PEEP/PI

Pvalvel

10a

Fig. 6: Tubing Diagram of Babylog 8000 „Version 2“

82

Dräger Medical AG & Co. KGaA 6173.3

210 gn

70

_ _Printed on_18.05.05_GBK61733XXD01.fm

Schematics and diagrams Babylog 8000

3 Inspiratory block

F3.1

Y3.2

S3.1

Y2.10

Y2.2

Y2.1

Y3.3

E

2

O

D3.1

R2.10

R2.2

R2.1

R3.2

Insp.

6 Pressure

measurement

11a

S6.4

4,8m

S6.3

P

E

D 4.1

R3.3

6 Valve block

11

10

Y3.1

R3.1

9a

9

Y2.20

R2.20

Y2.12

R2.12

Y2.11

R2.11

Exp.

12

12a

Y5.1

10b

10a

R1.1

Y4.1

4a

5 Expiratory valve

5a

4 PEEP/PIP valve

7

8

1a

E

P

7a

S6.1

E

P

6 Pressure measurement

R1.1

Y 1.6

S6.2

DR1.1

D1.1

F1.1

Air

DR1.2

F1.2

2a

3

4

nc

Y1.1

nc

D1.2

2

O

c

no

Y1.5

Y1.2

nc

Y1.3

c

no

6

nc

Y1.4

5

1 Gas supply block

Fig. 7: Function Diagram of Babylog 8000/Babylog 8000 SC „Version 3“

Version 3 (same as Version 2 + a nebulizer)

A nebulizer can be retrofitted in Versions 0, 1 and 2.

_ _Printed on_18.05.05_GBK61733XXD01.fm

Dräger Medical AG & Co. KGaA 6173.3

83

Babylog 8000 Schematics and diagrams

Hose 2x1.5

Detail Z

glued with silicone

(glue Elastosil

E41/Wacker)

±1

Si bl. 3 lg

Hose 4x1.5 Si tr.

20 lg

View V

10

Hose

2x1.5 Si

ge. 3 lg

Hose 2x1 Si

or. 3 lg

View Y

PA tube 6 x 1 bl. ye

2 x 1 Si rd. gn. or

2 x 1.5 Si tr. ye. bl.

Hose 2.7 x 0.65

- PA 11 w M 25778

Hose 2x1 Si

rd. 3 lg

5 x 2 Si tr.

4 x 1.5 Si tr.

235 bl.

Gas supply block

Detail X

170 ye

1

-2

DR1.1

DR1.2

View U

Hose 2x1 Si

gn. 10 lg

2

Y1.2

5

3

2

Y1.5

Y1.1

Air

2

Valve block

O

230 ye

M 22 286

2030

4

100

40

Y1.4Y1.3

120

View X

7

Y2.2

Y2.1Y2.11

1a

100 rd

230

Y2.12

Z

S6.3

X

S6.4

11a

12a

Z

100 or

sensors

Pressure

V

2a

U

7a

68 00 187

130

S6.2

8a

84 06 810

S6.1

85

68 00 187

Y2.10

9

8

Y2.20

Y

100

170 bl.

10

20

3a

9a

11

5a

X

10b

12

8409111

40

60

110

60gn

D4.1

4a

Y1.4

PEEP/PIP

valve

10a

70

Fig. 8: Tubing Diagram of Babylog 8000/Babylog 8000 SC „Version 3“

84

Dräger Medical AG & Co. KGaA 6173.3

210 gn

_ _Printed on_18.05.05_GBK61733XXD01.fm

Schematics and diagrams Babylog 8000

3 Inspiratory block

F3.1

Y3.2

S3.1

Y2.10

Y2.2

Y2.1

Insp.

6 Pressure measurement

Y3.3

E

2

O

D3.1

R2.10

R2.2

R2.1

R3.2

Y3.1

9a

9

R3.1

R2.20

R2.12

R2.11

11

10

11a

4,8

Y2.20

Y2.12

Y2.11

12

S6.4

S6.3

P

E

R3.3

6 Valve block

D 4.1

4a

12a

R1.1

Exp.

Y5.1

10b

10a

Y4.1

5 Expiratory valve

5a

4 PEEP/PIP valve

7

8

1a

E

P

7a

S6.1

E

P

6 Pressure measurement

S6.2

DR1.1

R1.1

F1.1

Y 1.6

Air

D1.1

DR1.2

F1.2

O

2a

3

4

Y1.2

nc

Y1.3

c

no

6

Y1.4

nc

5

1 Gas supply block

Version 3 (same as Version 2 + a nebulizer) with

conversion kit “purge flow”

Y1.1

c

nc

no

Y1.5

D1.2

2

Fig. 9: Function Diagram of Babylog 8000/Babylog 8000 SC „Version 3“ with

conversion kit „purge flow“

Important: This conversion kit is only necessary when pressure measuring problems occur in the HFV mode while the Aquamod is connected.

_ _Printed on_18.05.05_GBK61733XXD01.fm

Dräger Medical AG & Co. KGaA 6173.3

85

Babylog 8000 Schematics and diagrams

Hose 2x1 Si

or. 3 lg

View Y

PA tube 6 x 1 bl. ye

2 x 1 Si rd. gn. or

2 x 1.5 Si tr. ye. bl.

Hose 2.7 x 0.65

Hose 2x1 Si

rd. 3 lg

- PA 11 w M 25778

5 x 2 Si tr.

4 x 1.5 Si tr.

glued with silicone

Detail Z

Hose 2x1.5 Si

20 lg

View V

Hose

2x1.5 Si

bl. 3 lg

ge. 3 lg

(glue Elastosil

±1

Hose 4x1.5 Si tr.

E41/Wacker)

10

68 00 187

S6.1

85

View X

1a

2a

U

7a

68 00 187

130

S6.2

84 06 810

8a

230

Y2.1Y2.11

V

100 rd

Z

Y2.2

S6.3

Y2.12

X

11a

100 or

84 11 459

7

Y2.10

9

8

Y2.20

Y

S6.4

12a

Z

sensors

Pressure

20

170 bl.

100

10

3a

9a

11

X

5a

10b

12

View U

Hose 2x1 Si

gn. 10 lg

-2

2

Detail X

170 ye

1

Gas supply block

DR1.

DR1.2

Y1.2

5

3

2

Y1.5

Y1.1

Valve block

O

M 22 286

4

100

Y1.4Y1.3

Air

2

230 ye

2030

40

120

86

40

8409111

60gn

110

60

D4.1

4a

Y1.4

PEEP/PI

Pvalve

10a

70

Fig. 10: Tubing Diagram of Babylog 8000/ Babylog 8000 SC (Version 3 with

conversion kit „purge flow“)

The restrictor for the purge flow is integrated in the silicone hose (84 11 459)

Dräger Medical AG & Co. KGaA 6173.3

210 gn

_ _Printed on_18.05.05_GBK61733XXD01.fm

Schematics and diagrams Babylog 8000

Insp.

6 Pressure

measurement

Y3.3

3 Inspiratory block

Y3.

Y3.1

9a

9

F3.1

S3.1

Y2.10

Y2.2

Y2.1

E

2

O

D3.1

R2.10

R2.2

R2.1

R3.2

R3.1

R2.20

R2.12

R2.11

11

1

Y2.20

Y2.12

Y2.11

11a

S6.4

S6.3

P

E

4,8mL

R3.3

6 Valve block

D 4.1

Exp.

12

12a

Y5.1

10b

10a

R1.1

Y4.1

4 PEEP/PIP valve

4a

5 Expiratory valve

5a

7

8

1a

E

P

7a

S6.1

E

P

6 Pressure measurement

S6.2

DR1.1

R1.1

F1.1

Y 1.6

Air

D1.1

DR1.2

F1.2

2a

2

O

R6.2

R6.1

Y1.1

c

nc

no

D1.2

Y1.5

Y1.2

nc

3

4

nc

Y1.4

5

1 Gas supply block

Version 3.10

Version 3.10 with leakage compensation (avoids a subsequetn

Y1.3

c

no

6

Fig. 11: Function Diagram of Babylog 8000/Babylog 8000 plus/Babylog 8000 SC „Version 3.10“

_ _Printed on_18.05.05_GBK61733XXD01.fm

Dräger Medical AG & Co. KGaA 6173.3

87

Babylog 8000 Schematics and diagrams

Hose 2x1 Si

or. 3 lg

View Y

PA tube 6 x 1 bl. ye

2 x 1 Si rd. gn. or

2 x 1.5 Si tr. ye. bl.

Hose 2.7 x 0.65

- PA 11 w M 25778

Hose 2x1

Si rd. 3 lg

5 x 2 Si tr.

4 x 1.5 Si tr

glued with silicone

Detail Z

(glue Elastosil

E41/Wacker)

±1

Hose 2x1.5

Si bl. 3 lg

Hose 4x1.5 Si

tr. 20 lg

View V

Hose

2x1.5 Si

10

ge. 3 lg

Valve block

M 22 286

Y1.

Y1.1

Y1.4Y1.3

View U

Air

2

O

84 11 411

160 ye

20

30

4

100

68 00 187

40

120

Hose 2x1

Si gn. 10 lg

-2

2

Detail X

170 ye

235 bl.

1

Gas supply

Y1.2

DR1.

5

3

2

DR1.

S6.1

85

1a

2a

40 bl.

7a

68 00 187

130

View X

7

Y2.2

Y2.1Y2.11

Y2.12

84 11 411

20

X

V

U

S6.2

S6.3

8a

Z

20

100 rd

84 06 810

20

230

11a

100 or

S6.4

Z

Pressure

12a

sensors

20

Y2.10

9

8

Y2.20

110 bl.

Y

100

170 bl.

3a

10

9a

11

X

5a

10b

12

40

8409111

60gn

110

60

D4.1

4a

Y1.4

PEEP/PI

Pvalve

10a

70

210 gn

Fig. 12: Tubing Diagram of Babylog 8000/Babylog 8000 plus/Babylog 8000 SC „Version 3.10“

88

Dräger Medical AG & Co. KGaA 6173.3

_ _Printed on_18.05.05_GBK61733XXD01.fm

Error List

89

90

Error List Babylog 8000

1 Error messages

If the system detects a hardware or software error, it displays an error number on the LC display.

The error numbers are subdivided into the following ranges:

Number Range

000 to 999 CPU PCB 68000

100 to 199 Flow PCB

200 to 299 Monitoring PCB

300 to 399 I/O PCB

400 to 499 Communication PCB

500 to 599 CPU PCB 68000

600 to 699 Flow PCB

700 to 799 Monitoring PCB

800 to 899 Errors detected by the Monitoring PCB. If this error

occurs, partly more detailed error numbers are displayed on the 7-segment display of the Monitoring PCB.

_ _Printed on_18.05.05_GB_K61733XXFL1.fm

Dräger Medical AG & Co. KGaA

91

Babylog 8000 Error List

2 List of device error messages

If an error occurs, read the Babylog 8000/8000 SC error messages on the 7-segment display of the Monitoring PCB!

Table 1: Device error messages

Display error number

Monitoring PCB error number

Meaning

000 CPU PCB ROM error

001 CPU PCB RAM error

002 One or more keys jammed

(continuously pressed).

003 Data transmission between

CPU PCB and the dual-port RAM of the Monitoring PCB is interfered.

004 Watchdog error or CPU PCB reset

005 CPU PCB error: The CPU PCB is

in the boot phase although the Monitoring PCB is running in the background (e.g. by a CPU PCB reset).

006 Vector error or CPU PCB reset

500 Software error: Incorrect operating

mode, for example, error in storage of operational data in the time-keeper RAM on the CPU PCB.

501 Monitoring PCB does not function

correctly

502 Flow PCB does not function

correctly

503 CPU PCB software error:

Impermissible breathing phase

504 CPU PCB software error

92

Dräger Medical AG & Co. KGaA

_ _Printed on_18.05.05_GB_K61733XXFL1.fm

Error List Babylog 8000

Table 1: Device error messages

Display error number

Monitoring PCB error number

Meaning

505 CPU PCB software error

506 to 513 CPU PCB software error.

800 FiO

too high by more than 10

2

vol.%.

801 FiO

too low by more than 10

2

vol.%.

802 FiO

measurement deviation

2

between master (CPU PCB and I/O PCB) and Monitoring PCB is too high.

803 Measured Pinsp to potentiometer

setting Pinsp too high by more than 25 mbar (cmH

2

O).

804 Pinsp greater than 110 mbar

(cmH2O).

805 Pinsp less than -5 mbar (cmH2O)

806 Flow measurement on the Flow

PCB is faulty

807 Potentiometer evaluation is faulty:

Master (CPU PCB and Frontcontroller PCB) and Monitoring PCB read different values.

809 Battery or battery charge faulty

(battery voltage < 7 V)

_ _Printed on_18.05.05_GB_K61733XXFL1.fm

Dräger Medical AG & Co. KGaA

93

Babylog 8000 Error List

Table 1: Device error messages

Display error number

Monitoring PCB error number

Meaning

810 Mains switch auxiliary contact is

faulty, (battery voltage > 12 V)

811 Safety relay on the Pneumatic

Control PCB is faulty.

During the boot sequence, master

CPU PCB and Monitoring PCB do not run synchronously.

813 Valves driver monitoring on the

Pneumatic Analog PCB faulty. Applies to software versions 3.n and 4.n only: Air and O

pressure

2

supplies are not connected upon power-on.

815 +27 V voltage supply is faulty.

816 Valve drive is faulty.

817 Loudspeaker or feedback is faulty.

818 Babylog 8000/8000 SC device

temperature is too high.

819 Temperature measurement is

faulty.

820 +15 V comparator is faulty.

94

Dräger Medical AG & Co. KGaA

_ _Printed on_18.05.05_GB_K61733XXFL1.fm

Error List Babylog 8000

Table 1: Device error messages

Display error number

Monitoring PCB error number

Meaning

-15 V comparator is faulty.

+5 V comparator is faulty.

+27 V comparator is faulty.

822 O

calibration sequence is faulty.

2

823 The CPU PCB is not functioning

properly, according to the Monitoring PCB.

824 Timer in time-keeper RAM on the

CPU PCB is faulty.

825 Power pack is faulty, +15 V error.

Power pack is faulty, -15 V error.

Power pack is faulty, +5 V error.

Power pack is faulty, +27 V error.

The Monitoring PCB is faulty.

_ _Printed on_18.05.05_GB_K61733XXFL1.fm

Dräger Medical AG & Co. KGaA

95

Babylog 8000 Error List

Table 1: Device error messages

Display error number

Monitoring PCB

Meaning

error number

RAM on Monitoring PCB is faulty.

ROM on Monitoring PCB is faulty.

Powerfail from the power pack.

Watchdog test on Monitoring PCB

after power-on.

Watchdog test on Monitoring PCB

completed.

Master (CPU PCB) did not start

after the Babylog 8000/8000 SC start.

96

Dräger Medical AG & Co. KGaA

_ _Printed on_18.05.05_GB_K61733XXFL1.fm

Annex

Spare parts list

Test List

Technical Information according to EMC standard IEC/EN 60601-1-2:2001

97

98

Drager Babylog 8000, Babylog 8000SC, Babylog 8000 plus User manual

Specifications and Main Features

Frequently Asked Questions

User Manual