Nellcor N-6000 User manual

SERVICE

MANUAL

PULSE

Caution:

NELLCOR®

OXIMETER

Federal

to

sale

by

MODEL

law

or

on

the

ULTRA

AND

N-6000

(U.S.)

order

CAP™

CAPNOGRAPH,

restricts

of a physician.

this

device

©

1993

Nellcor

Incorporated

Nellcor

25495

Hayward,

Incorporated

Whitesell

California

510

887-5858

1-800-NELLCOR

.

Street

94545

U.S.A.

028065A-0193

Corporate

Headquarters

European

Office

Asia/Pacific

Headquarters

Nellcor
25495
Hayward,

Whitesell

USA

Tel

510-887-5858

Incorporated

Street

California

94545

Nelleor
Hambakenwetering
5231
The

Tel.

European

Northwest
Nellcor

Hambakenwetering
5231
The

Tel.

Middle
Nelleor

Black-&-Decker-Strasse
W-6270

Germany

|

Tel.

Southern
Nellcor

3,

78353

France
Tel.

BV

DD

’s-Hertogenbosch

Netherlands

+31.73.426565

Regional

Europe

Europe

DD

‘s-Hertogenbosch

Netherlands

+31.73.426565

and

GmbH

Idstein

+49

6126.5930

Sarl

rue

du

Petit

Jouy-en-Josas

+33.1.39.46.96.58

BV

Central

Europe

Robinson

1

Offices

1

Europe

.

28

Cedex

Nellcor

Suite

Admiralty

18

Hong Kong

Tel.

Limited

1204C

Harcourt

+852.529.0363

Centre,

Road

Tower

1

European

Nellcor

University

Science

Coventry

United

Tel.

Nelleor

Interleuvenlann
B-3001
Belgium

Tel.

Local

(UK)

Limited

of

Park

CV4

7EZ

Kingdom

+44.203.690220

(Belgium)

Leuven

+32.16.400467

Offices

Warwick

NV/SA

62/8

.

ii

TABLE

OF

CONTENTS

11
12
13

2.1

2.2

2.3

2.4

2.5

3.1

3.2

3.3

3.4

Symbols
We
Introduction...

Introduction.........................

Warnings,

Description..................,..,............,...

1.8.1

13.2

13.3

13.4

1.3.5

1.3.6

1.3.7

18.8

1.3.9

1.3.10

1.3.11

13.12
Principles

Overview.........................

PulseOximetrySubsystem.......................

2.2.1

2.2.2

2.2.8

2.2.4 - Measured
Capnography
N20/02

24.1

2.4.2

2.4.3.

2.4.4

2.4.5

2.4.6

2.4.7

.

Factory

Circuit

Introduction.................

CO2

3.2.1

3.2.2

3.2.3

8.2.4

3.2.5

3.2.6

3.2.7

8.2.8

3.2.9

3.2.10
Oximetry

©

8.8.1
Detailed

3.4.1

AAA

Cautions,

Visible
Audible
Visible

StatusMessages..............................

Automatic

On-Screen

N-6000
Trend
Automatic

Battery

Noninvasive

C-LOCK™

C-LOCK

Automatic

Functional

Standard

Pressure

N20
O2

Water

BTPS/ATPS
Summary:

Calibrated

Analysis

Module

Sensor
CO2

Default

Memory......:...,...............,,,,,......

of

Subsystem

Compensation

Collision
Collision

Circuit

Module

bDigital.....................

Motor

Signal

Heater

Source....

Barometer...

StatusLEDs....................

Status

OximetryModule........................

Oximetry

Control........

Module

Oximetry

and Notes

and

Audible

Indicator.......................

and

Operation

Broadening

Vapor

Operation.........

22220

Audible

Self-Test

Menus..................,...,,,.......

and

Calibration..…..............,........,.,.......ss

..................

Oximetry

ECG

Synchronization

Operation.

ECG

Calibration..................

versus

versus

Gas

Reported

Amplifier..

LED

Module

Calculated

............................

............

Conditions

Broadening...........

Broadening.........................,.,...........ss

Effect...

Compensation.

Sensor

Details.

Hardware

Summary............

Block

Diagram

Module

...

Indicators.

Alarms.

and

Warm-Up

Custom

Synchronization

Fractional

CO2

μμ

Default

Sensors.........................

Saturation

Compensation...

Values...

ΕΟΟ

....

Analysis

Circuit

Analysis

Time..

Set-Up

for

Pulse

Saturation...

...

…

.

.

Oximetry..

....

...

...

レレ

くく

レト

issues

ニュ

レッ

くく

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..

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.

..

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..

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...
…
...

ας

.

.

1-1
1-1
1-2

1-2
12

1-2

1-3

13
13
13
13
13
1-4

2-1
21
2-1

2-3
2-5
25

2-5

2-6
2-6
2-6
2-6
2-6
2-7

3-1
3-2
3-2
3-2

3-2

3-3
3-8

3-8

3-3

3-3
BA
3-4

3-4
3-6
3-6

TABLE

OF

CONTENTS

(continued)

3.5

3.6

4.1

4.2

4.3

4.4

5.1

5.2

5.3

6.1

6.2

”Disassempbly

7.1

7.2

7.3

8.1

8.2

8.3

9.1

Main

8.5.1

8.5.2

3.5.3

3.5.4

8.5.5

8.5.6

3.5.7

8.5.8

8.5.9

3.5.10

3.5.11

3.5.12

3.5.13
Power

3.6.1

3.6.2

3.6.3

3.6.4
Routine

Introduction............

Cleaning
Changing
Replacing
Packing

Överview...........................

Repacking

Repacking
Disassembly

Introduction............

6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

6.2.6

6.2.7

6.2.8

6.2.9

Testing

Description.....................

COs

7.2.1

7.2.2
Calibration

Troubleshooting........................

Introduction.......

Advisory

Status
Spare
In

Processor
Microprocessor
Power.
Reset
Battery
Internal
Graphical

BEPROM..............

FLASH
Real

Time

Audio

Charging
Patient
Front

Supply-Charger
Power
AC

Rectifier

+5

Volt

C-LOCK

Maintenance

Instructions............

Mains

or

Changing

and

PCB

Control.........

and

Watehdog......................

Backup

and

Display

Memory.

Clock....

Generation

Indicator................

Isolation

Panel

Supply

and

Logic

QRS

Voltage

Shipping......

Circuit

Section.......,...............,....,......,

and

Memory

External

..................,....,,.....,..,.

....

Power

Display

and

Sync

Controller..

PCB
Charger
+12

volt

Display

Input

......................

Input

the

Fuse...

Details.

Retention............

Serial

Supply...

Communications..

Circuit

Theory

Battery

Power

Circuit...

....

In

Original

In

New

Guide........

Procedure

RemovinginstrumentCover...........................

Removing

Removing

Removing
Removing
Removing
Removing
Removing
Removing

and

Calibration

Carton..

Carton

Front Panel

Power

Transformer..........

.......

了

attery.

Oximetry

Main

Pull-Out

Speaker............................

............

and

C02

Processor

Assembly

Card

Supply-Charger

Display

ConventionS
Service
Breath

and

Screen

Detection

Accuracy

and

Display

and

Check

Conventions...................

Display

of

Messages.

Messages.....

Parts........

го

ас

6101...

sise

ーー

...

essences

Details.........

of

Charger...........

Supply

Subassembly..

PCB...........................

.............................,................,.....

Tray...

Assembly.

0

End-Tidal

Operation..

....

…

<

scccrcre*

CO2

ui

iii

Values..

…

ees

enten

ennen

eker

0040000400000

000000e0

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nernnse

„

en

…
..
.

.
..
..
..

72
7-6
8-1
8-1
8-6
8-7
9-1
9-1

iv

TABLE

OF

CONTENTS

(continued)

10

10.1
1

11.1

11.2
113
114
185

11.6.

11.7.

¡ACA

Overview.........

Specifications.............

Physical/Environmental.........

Components
Controls

Connectors................

Performance.

Calibration.....

Airway

and

Adapter

11.8 再 jectrical.

2

12.1

2-1
2-2
3-1
3-2
3-3
3-4
3-5
8-6

8-7
4-1
4-2

6-1
7-1

Schematic

Introduction...................,......,.................

Oxyhemoglobin
Nondispersive
Overall
Oximetry
LRD
Input

Input

A:D

Support

North

European
Disassembly
Failed

Block

Module

Driver

Signal

Amplifier,

Conversion

American

LED

essences

and

User

Interface..

Indicators...........

EP O KO KO R O R K

0

0000

Koh

OK S KO

RS O O

Diagrams..

see

LIST

OF

FIGURES

Dissociation

Infrared

Diagram..........................

Overall

Cireuit に し に

Processing.

Synchronous

Circuits.......................,.......,,,...........

Circuits...................

Fuse

Аттапветейв.............

Fuse

Diagram..............

Атгапретейф...............

Digits

Curve..........................................

CO2

Block

に に に レート

Analyzer..

Diagram...

ーーー・

Detector,

and

Filter/Amplifier

линии

нии

ини

тни

KOK

KK P KKK

низине

ss

KK O RR

oP P een

K R

0.0000

öseeeeeea

PK O v

нение

наити

ek

6

εως

Kone

..

.

7-1
8-1

The

United

OXISENSOR;;

The

4,770,179;

Service
Troubleshooting

following

States

N-6000

Screen

are

trademarks

and

other

and

is

covered

4,802,486;

IndicatiomS

Guide

countries;

ULTRA

by

4,869,254; 4,928,692;

the

following

CAP,

of

Nellcor

C-LOCK,

which

レレ

ーー

patents:

トレ

ーー

トト

ーー

Incorporated:

which

is a

commercial

U.S.

4,934,372;

NELLCOR,

is

registered

Patent

and

スー

スト

ドー

くに

トー

which

in

the

trademark.

No.

4,621,643;

corresponding

トト

トト

トス

is

United

4,653,498;

patents

スレ

(レレ に レレ に トス

registered

States;

4,700,708;

in

other

countries,

レト

in

ストー

the

て

SYMBOLS

O/O

Sc

nx

el

On/Standby

Pulse

tone

volume

Audible

C-LOCK

Low

alarm

signal

battery

off

lost

FRONT

PANEL

eke

MENU

A

+

ni

Freeze

Menu

Audible

C-LOCK

Battery

alarm

in

in

use

on

use

κ

220/240V~
FRONT

PANEL

A

Battery

INSTRUMENT

Attention:
manual!

charging

ONLY

Refer

to

operator’s

Type

BF

equipment,

(patient

electrically

isolated)

vi

SYMBOLS

AS

=

MO

À

Battery

ECG

fuse

input

On/Off

BF

Type

(patient

equipment,

electrically

isolated)

BACK

PANEL

O

<>

RS232

Fuse

replacement

Eguipotential

RS232inputoutput

ground

port

110/120
BACK

VOLT

PANEL

INSTRUMENTS

Instrument
proof.

ONLY

not

anesthetic

VAN

Attention:

Refer

manual!

to

operator’s

vii

WARNINGS

The

N-6000 contains

service

.

[For

The
from

connection,

must

be

protection

N-6000

is a patient-connected

potentially

the

no

performed

against

fire

dangerous

procedures

user-serviceable

by

qualified

hazard,

personnel.

replace

medical

electrical

and

potentials

part

specifications

parts.

fuses

device.

For

protection

only

Isolated

or

ground

contained

with

against

the

same

patient

paths.

in

this

electrical

type

and

connectors

To

protect

manual

rating.

protect

the

integrity

must

hazard,

the

be

adhered

all

patient

of

this

to.

viii

1.1

INTRODUCTION

This

manual

and

capnograph,

personnel,

Note:
service

language

screen,

and

then

who

This

screens.

option

press

press
“LANGUAGE”
from

the

left.

or

“ENGLISCH.”

ㆍ

The

N-6000

time

monitoring

carbon

.

SpO2
SpO2
numerically,
shows

contains

information

model

have a technical

manual

the

If

to

Freeze

the

the

is

written

unit

English.

second

(LANGUE

Press

this

is a compact,

of

dioxide

is

noninvasively

sensors

(ETCO2),

which

while

the

patient’s

N-6000.

for

is

configured

To

reach

button

key

and

in

to

on

fourth

French

gain

oxygen

and

and

are

available

the

plethysmograph

relative

SECTION

I

Introduction

for

servicing

Service

of

this

background

an

N-6000

for

the

language

the

front

soft

keys

and

SPRACHE

access

microprocessor-controlled

saturation

respiratory

continuously

for a variety

pulse

strength

the

product

in

analog

configured

French

panel

from

to

the

language

(SpO2),

rate

measured

is

displayed
as

NELLCOR®

must

and

for

or

German,

selection

while

the

the

left

in

German)

pulse

(RR).

of

patient

measured

ULTRA

be

done

digital

by

electronics.

CAP™

qualified

English-language

the

technician

menu

main

at

selection

instrument

rate

using

from

monitoring

the

same

appears

(PR),

Nellcor's

sites.

the

time.

above

menu

and

used

for

inspired

reusable

SpO2

values

main

screen

The

CO2

as a waveform, A bar

by

the

pulse

oximetry

pulse

service

displays

must

and

change

monitoring

is

displayed,

legend

the

fourth

select

“ANGLAIS”

continuous

(ins.),

or

adhesive

are

displayed

graph

circuits.

oximeter

the

soft

key

real-

end-tidal

indicator

ㆍ

ETCOs
intubated
exhalation

This

manual
digital
N-6000

maintenance

12

Before
These
proper

WARNING:

service

Caution:
always

patient

operator’s

WARNINGS,

you

terms

operation

technician.

Cautions

in

boldface

Note: A note

is

determined

patient’s

is

is

intended

monitoring

or

repair.

read

the

identify

A

warning

gives

by

positioning

airway

displayed

for

(15

mm

numerically,

use

by

equipment.

manual

CAUTIONS,

N-6000

of

this

and

be

AND

service

information

instrument.

familiar

manual,

that

describes a condition

WARNINGS

are

describes a condition

type.

information

that

an

diameter).

while

authorized

Service

with

NOTES

it

pertains

that

always

warrants

that

in

may

infrared

The

CO2

is

service

personnel

instrument

is

important

to

technician

may

result

boldface

result

special

attention.

mainstream
amount

of

displayed

personnel,

must

have

operation

to

understand

and

in

injury

type

and boxed.

in

damage

CO2

sensor

CO2

present

as a waveform.

trained

read

patient

to

in

ahd

before

the

safety,

to the

the

instrument.

servicing

understood

attempting

following

patient,

across

at

the

and

an

end

of

analog

the

terms.

indicates

operator

Cautions

and

or

are

1-1

1.3

DESCRIPTION

The

following

1.3.1

Visible

The

N-6000

.

C02

*

provides a qualitative

9

Trends

paragraphs

and

features

and

plethysmographic

are
displayed:
respiratory

ㆍ

When

the

switch, a battery

1.3.2

Audible

Indicator

describe

Audible

Indicators

numeric

displays

indication

acquired

SpO2

rate

for

trend

alone;

trends;

all

SpOz,

operator connects

charging

the

N-6000

of

SpO2,

waveform

of

pulse

parameters,

CO2

trend

CO2,

pulse

the

monitor

indicator

lights.

and

list

PR,

RR,

displays:

strength

and

the

alone;

rate,

to

AC

SpO2

and

power

important

and

ETCO2:

and a pulse

at

the

oximetry

following

and

CO2

respiratory

and turns

features.

amplitude

five

trend

trends;

rate

on

the

bar

sensor.

screens

pulse

trends.

rear-panel

graph,

can

rate

and

which

be

on/off

Pulse
pitch
decreases.
can

1.3.3

The
moves
apnea,
priority
the
button

ALARM

function

Note:

Note:

rate

of

this

watch

Visible

monitor

outside

or

of

alarm

alerts

SILENCE

disabled.

are

always

The

When

audible

1.3.4

A

Status

status

alarm

message

identified

and

tone

This. early

the

patient

and

has

when a sensor

the

alarm

temporarily. A flashing

the

operational.

SpO2

the

Messages

by a module

troubleshooting

oxygen

changes

warning

and

Audible

both

visible

an

adjustable

state.

operator

indicator

Visible

and

ETCO2

French

function

is

displayed

the

problem.

saturation

with

listen

are

indicated
variation
system

for

encourages

SpO2

in

changes

Alarms

and

limit

gets

disconnected.

Pressing

that

the

warns

alarms

numeric

language

audible
(operator-defined),

the

ALARM

alarm

that

appear

is

chosen

alarms.

The

ALARM

SILENCE

tone

one

on

indicators

and

disabled, a single tone

in

case

an

error

identifier

and

(See

an

error

section

VIII

audibly

SpO2,

tone

SILENCE

has

or

more

the

monitor

change

one

occurs

condition

code

for

with a tone

rising

prompt

as

saturation

corrective

simultaneously.

These

when

and

alarms

the

monitor

pattern

button

indicator

been

silenced

parameters

temporarily. A steady

sereen,

from

green

or

more

of

the

every

three

occurs.

number

more

that

information.)

that

increases

action

are

activated

detects

of

the

audible

turns

adjacent

have

had

and

unlike

to

red

parameters

minutes.

An

error

assists

signals

since

off

the

to

the

their

audible

when

condition

service

each

and

the

pulse.
falling

The

as

clinician

when a variable

loss

of

pulse

or

alarm

audible

ALARM

audible

depend

portion

SILENCE

ON

of

alarm

on

the

alarms,

an

alarm

have

had

personnel

the

will

occurs.

error

be

in

it

the

of

they

1.3.5

Automatic

The

monitor

test

takes

that

the
allowing
45

seconds.

approximately

program

the

Self-Test

automatically

mainstream

If

an

error

“Troubleshooting,”

1.8.6

On-Screen

The

on-screen

at

the

bottom

function

MENU

1.8.7

The
Once

1.3.8

The

button

N-6000

N-6000

configured,

Trend

N-6000
memory
the

memory

memory

continues

key

can

can

while

Menus

menu

of

the

is

pressed,

to

display

Default

power-on

Memory

stores

be

viewed

is

full,

be

viewed

the

memory,

is

for

more

guides

screen

and

default

the

custom

up

to

in

the

oldest

on

trend

and

Warm-Up

performs a series

15

seconds

data

COz

after

memory,

sensor

to

detected, a status

information.)

the

operator

just

above

the

the

screen

the

top level

Custom

24

hours

30-minute,

the

data

displays a new

Default

settings

alarm

data

of

trend

are

limits

sereen

are

being

menu,

can

2-hour, 4-hour,

automatically

and

Time

of

the

operator

and

internal

warm.

The

message

—

through

four

function keys

or

to

Set-Up

be

customized

will

always

data

for

can

be

printed.

diagnostic

turns

circuitry

CO2

sensor

appears.

all

system

menu

return

with

to

according

be

CO2,

SpO2,

8-hour,

erased

printed

with a printer.

tests

when

on

the

are

warm-up

(Refer

functions.

that

are

additional

the

main

in

place,

pulse

12-hour,

as

new

turned

monitor.

These

functioning

time

to

Section

Menu

used

to

select

functions.

monitoring

to

institutional

even

after

rate,

and

or

24-hour

data

are

Patient

on.

The

system

tests

properly,

is

approximately

8,

items

an

are
item.

Press

screen.

requirements,

power-down.

respiratory

segments.

stored.

Data

monitoring

self-

confirm

while

displayed

When

the

rate.

Trend

When

stored

a

in

1.3.9

Automatic

The

SpO2

subsystem

the

system

is

turned

whenever a new

calibrated.

1.3.10

Battery

If

external

90

minutes

minutes

ㆍ

by

By

choosing

power

on

using

(including
w/BATTERY
displays

.

battery

When
AC

the

the

life.

the

MAINS

MENU

operator

Calibration

of

on

oximetry

Operation

is

lost

its

rechargeable

the

GRAPHICS

GRAPHICS

all

waveforms,

OFF,

only

the

numerical

GRAPHICS

power,

button

reapplies

the

N-6000

and

periodically

sensor

or

transportable

is

internal

w/BATTERY

messages,

the

display

values

w/BATTERY

the

display

to

turn

the

AC power

is

fully

thereafter.

connected.

operation

battery.

w/BATTERY

remains

of

option

will

only

GRAPHIC

to

the

self-calibrating.

It

Additionally,

The

capnography

is

necessary,

This

operating

power

ON

etc.)

will

blank

SpO2

is

blank

w/BATTERY

in

the

continue

during

and

ETCO2,

selected

when

saver

SYSTEM

battery

to

the

option

monitor.

is

calibrated

it

subsystem

the

N-6000

time

option.

menu,

to

operate.

This

allows

be

OFF

unit

transfers

ON.

automatically

is

recalibrated

of

can

can

be

extended

the

display

By

choosing

operation.

up

to

and

the

to

The

display

automatically

the

N-6000

operate

up

graphics

The

N-6000

180

minutes

unit

is

battery

returns

whenever

is

factory

up

to

to

180

GRAPHICS

of

operating

power.

Press

when

on

1.3.11

Noninvasive

Oximetry

Sensors

Noninvasive
two

light-emitting

differences

infants,

1.3.12

children,

C-LOCK™

If a patient
quality
separate
signal

for

signals

from

synchronize

When

If
SIGNAL
N-6000

the

C-LOCK

ECG

LOST

is

not

NELLCOR

diodes

in

tissue

is

moving

thickness

and

adults.

ECG

Synchronization

or

measurements

that

reflect

the

ECG.

The

the

SpOz

measurements.

ECG

synchronization

signal

is

lost

symbol

being

used.

oximetry

(LEDs)

or

Refer

has

poor

of

oxygen

cardiac

N-6000

or

deteriorates

appears

on

sensors

as

light

sources.

skin

pigmentation.

to

specific

for

perfusion,

saturation.

activity:

uses

the

ECG

is

used,

to

the

the

display.

obtain

sensor

Pulse

C-LOCK

When

an

QRS

the

point

No

measurements
The

N-6000

Specific

directions

Oximetry

ECG

this

feature

optical

signal

complex

C-LOCK

that
symbol

it

IN

can

is

:

by

optical

adjusts

sensors

automatically

are

for

use

for

synchronization

is

used,

the

from

the

sensor

to

help

identify

USE

symbol

no

longer

displayed

be

if

used,

the

means

available

complete

can

enhance

N-6000

and

the

pulse

appears

the

C-LOCK

C-LOCK

alone,

using

for

for

neonates,

information.

signal

receives

an

electrical

and

on

the

display.

feature

of

two

the

2.1

OVERVIEW

This

section

2.2

PULSE

The

N-6000
plethysmography.
sensor
photodetector.

920

nm).

The

photodetector

absorption.

With

each
hemoglobin
The

N-6000

hemoglobin

In

principle, a pulse
Absorption
both

wavelengths

describes,

OXIMETRY

oximetry

has two

When

low-voltage

One

the light

heartbeat, a pulse

differs

measures

that

is

also

in

subsystem

It

includes

LED

measures

from

red

is

saturated

oximeter

measured

results

general

SUBSYSTEM

light-emitting

emits

from

deoxygenated

and

in a value

terms,

is

based

an

‘electro-optical

red

light

the

LEDs

the

light

of

oxygenated

infrared

with

oxygen.

measures

when

pulsatile

SECTION

Principles

operating

on

the

diodes

(nominal

passes

that

hemoglobin
absorption

for

the

through

passes

arterial.blood

the

light

arterial

arterial

II

of

Operation

principles

principles

sensor

(LEDs)

through,

absorption

and a microprocessor-based

as

660

nm)

the

flows

in

its

to

determine

blood

oxygen

for

the

N-6000.

of

spectrophotometry

light

sources,

and

the

other

sensor

which

relative

is

saturation

to

by

tissues

in

the

the

site,

part

indicates

the

sensor

red

and

percentage

and

tissue.

(SpO2).

and

and

one

photodiode

emits

infrared

of

the

light

red

and

infrared

site.

Oxygenated

infrared

of

functional

nonpulsatile

The

ratio

module. The

as

(nominal

is

absorbed.

absorption.

blood.

of

absorption

a

at

2.2.1

C-LOCK

Through
identifying
during

When

an
complex

with

length

relationship
random

If

an
optical
C-LOCK

C-LOCK

patient

provided

optical

is

the

patient’s

of

the

motion.

ECG

pulse

ECG

signal

detected,

signal

ECG

Synchronization

ECG

the

pulse

and

movement

with

an

from

the

an

physiology

delay

is

relatively

is

used

to

identify

is

not

provided,

alone

is

used

synchronization

synchronization,

synchronizing

and

when

the

ECG

signal,

sensor

optical

and

to

determine

pulse

the

and

an

is

with

the

stable.

“good”

or

if

that

resumes

detected

Through

pulses

the

N-6000

SpO2

measurements.

patient’s

N-6000

electrical

at

location

and

signal

the

pulse

when

an

uses

an

perfusion

receives

signal

the

of

the

C-LOCK

reject

deteriorates

rate

adequate

is

two
from

sensor

sensor.

ECG

nonsynchronized

and

to

ECG

signal

This

poor.

signals

the

site.

The

However,

synchronization,

so

that

initiate

ECG

signal

as a reference

enhances

that

ECG. A short

length

it

can

saturation

is

signal

reflect

for a given

artifacts

no

cardiac

time

of

this

that

such

longer

measurements.

available.

point

quality

activity:

after a QRS

delay

varies
patient,
time

as

be

used,

for

the

-

the

2-1

2.2.2

Automatic

The

oximetry
calibrated
connected.
differences

Each

sensor

determined

calibration

obtained

2.2.3

by

Functional

Calibration

subsystem

each time

Also,

the

in

tissue

is

calibrated

and

encoded

resistor

that

sensor.

versus

incorporates

it

is

turned

intensity

of

thickness

when

into a calibration

to

determine

Fractional

automatic

on,

at

periodic

the

sensors

and

pigmentation.

manufactured:

resistor.

the

appropriate

Saturation

calibration

intervals

LEDs

is

the

effective

calibration

thereafter,

adjusted

The

instrument’s

mechanisms.

and

automatically

mean

wavelength

coefficients

It

is

automatically

whenever a new

to

compensate

of

the

software

for

reads

the

measurements

red

this

sensor

for

LED

is

is

Because
those
expressed
N-6000

functional

the

N-6000

of

instruments

as a percentage

uses

two

SaO2.

carboxyhemoglobin

In

contrast,
Oximeter
measured
Measured

Consequently,
other

measurements

some

report

hemoglobin,

dysfunctional

to

instrument

can

functional

2.2.4

Measured

When
oxygen

saturation

(PaO2),
because
the

relationship

carbon

dioxide

the

versus

the

calculated

between

(PaCO2),

measures

that

measure

of
wavelengths,
It

does

not

or

methemoglobin.

laboratory

fractional

SaQ2-—~oxygenated

whether

hemoglobins

directly

must

measure

be

converted

compare

saturation

Calculated

is

calculated

calculated

saturation

PO2
the

functional

the

hemoglobin

it

measures

detect

instruments

or

not

N-6000

functional

using

=

100 — (%carboxyhemoglobin + %methemogiobin

SaO2,

fractional

SaO2.

that

oxygenated

significant

such

that

hemoglobin

are

included.

measurements

SaO2.

the

following

it

may

produce

Functional

is

capable

and

amounts

as

the

of

Instrumentation

hemoglobin

is

If

it

measures

equation:

fractional

measurements

SaQ2

of

transporting

deoxygenated.

dysfunctional

expressed

available

with

those

fractional

saturation

Saturation

from a blood

value

may

may

and

saturation

concentrations

not

gas

measurement

differ

from

have

been corrected

(Figure

of

2,3-DPG

the

N-6000

2-1):

temperature,

and

of

the

SpO2

for

fetal

is

oxygenated

oxygen.

hemoglobin,

hemoglobin,

Laboratory

as a percentage

for

oxygen

of

another

Sa02,

~

partial

pressure

measurement.

the

effects

pH,

of

the

hemoglobin.

that

differ

hemoglobin

Because

yielding

such

282

CO-

of

all

transport.

instrument,

those

x

of

arterial

This

variables

partial

that

pressure

from

the

as

that

is

shift

of

2-2

100

—

pH

t

Temperature

+

PCO2

+

+

2,3-DPG

=
ο

я

504

5

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の

a

+

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0

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+

+

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est

n°

pH

Temperature

PCO2

2,3-DPG

50

PO:

(mmHg)

=.

100

2.3

CAPNOGRAPHY

The

N-6000

present

sensor
ventilator
elbow
into

Infrared

infrared

specific
the
versus

have

at

the

that

circuit

and

the

contact

spectroscopy

light.

wavelengths

infrared

the

similar

proportional

determined

The

CO2

detection

“optical

bench”),

wavelengths

During
reaches

selectively
second.

monitoring,

the

absorbed

Three

uses

nondispersive

end

of

exhalation

attaches

to a disposable

either

patient

with

Of

the

respired

the

wye.

can

normally

of

spectrum

wavelength

spectra

to

by

that

the

concentration

comparing

mechanism

has

an

corresponding

light

narrow-band

by

measurements

Figure

2-1:

SUBSYSTEM

infrared

(ETCO2).

between

infrared

of a molecule

of

have

infrared

first

infrared

0602.

the

The

CO2

gases.

be

used

respired

light),

is

overlapping

the

absorbance

used

to

an

passes

It

then

are

to

light

of

source

absorption

Oxyhemoglobin

spectroscopy

It

features a small

airway

adapter.
endotracheal
mainstream

measure

gases,

(i.e.,

have

(usually

unique

to.

absorption

the

absorbing

to

that

in

the

N-6000

that

peak

through

filter,

which

encounters

obtained

during

Dissociation

to

The

tube

sensor

the

concentration

only

CO2,

an

infrared
displayed
that

molecule.

molecule,

of a known

(commonly

is

optically

of

the

the

respiratory

was

selected

the

chopper

each

quantitatively

lightweight

airway

and

fits

as a graph

peaks.

filtered

CO2

rotation:

the

ventilator

on

top

N20,

and

spectrum).

However,

Because

an

standard.

referred

spectrum

gas

because

wheel,

adapter

of

of

any

of

unknown

to

in

Curve

measure

the

“mainstream”

is

inserted

circuit

the

adapter

molecule

water vapor

This

light

different
the

to

as

provide a narrow

(see

the

airway

it

passes

which

rotates

or

and

that

selectively

absorption

absorbed

molecules

absorption

concentration

the

CO2

Figure

adapter.

wavelengths

many

amount

of

CO2

into

the

between

by a molecule

sensor

2-2).

does

not

absorbs

pattern,

may

of

light

can

band

Next

times

the

absorb

be

or

of

that

CO2

come

is

it

are

each

ο

wheel

A

sample

and

measurement

then

reaches

the

is

made when

detector

(i.e.,

light

the

light

passes

passes

through

through

the

the

open

respiratory

area

gas).

of

the

chopper

.

A

reference+sample
containing a known
respiratory

ㆍ

A

reaches

The

ratio,

determine

from

the

The

N-6000
assumed
N-6000.
expressed
are

assumed

is

being

to

fully

The

N-6000
dynamically
several
ETCO?

The

value
obtainable
simply
value
ETCO2.

patient.

gas

and

dark

measurement

the

detector).

“reference+sample/sample”,
the

CO2

analysis

measures

conditions

When

displayed

saturated

spontaneous

value,

average

of

ETCO2

This

units

as % dry

to

be

detects

from

the

of

ETCO2

from

the

all

seen

results

measurement

CO2

concentration

gas

in

the

is

concentration

of

the

CO2

the

partial

of

33° C and

of % (by

gas.

By

convention,

measured

on

the

conditions

and

maximum

breaths

N-6000

that best

patient

breaths

within

in a stable

from a patient

front

counts

with

accurately

during

together

the

is

obtained

and

reference

made when

in

waveform

airway

fully

volume)

panel

(BTPS ) before

breaths

and

minimum

low

estimates

last 8 seconds
ETCO2

cell).

light

is

then

respiratory

(capnograph).

pressure

saturated.

are

displayed

all

readings

and

LED

in

when

ETCO2

detects

the

forced

to-display

exhalations.

value

when

then

reaches

strikes a solid

used

in

gas.

Respiratory

of

CO2

Barometric

on

of

corrected

units

of

being

displayed.

the

COz2

level

CO2

values.

values

and

true

the

and

that

followed

counts

alveolar

ETCO2

displays

best

light

passes

the

detector

area

the

sensor-specific

rate

in

the

patient

pressure

the

front

panel

CO2

posted

to

body

mmHg

crosses a threshold,

Hence,

all

breaths.

CO2

Unlike

value,

that

approximates

on

temperature

or

kPa,

when a ventilated

by a mechanical

value

conventional

the

maximum

through a reference

(i.e.,

light

passes

of

the

is

determined

airway

is

measured

LEDs,

the

the

values

is

the

N-6000

the

arterial

wheel

front-panel

maximum

(1.9.,

calibration

adapter

the

measured

(37°

C).

are

which

breath

capnometers

looks

for

value

for

PaCO

gas

through

no

light

equation

by

the

N-6000

at

normal

directly

also

is

value

the

the

by
value

LED

display

When

patient

with a higher

PCO2

converted

set

has

that

maximum

true

value

in

cell

to

the

is

the

2-4

Light

source

Figure

2-2:

!

Airway

adapter

Nondispersive

Infrared

filter

Chopper

wheel

Infrared

Reference
gas

cell

Open

area

Photodetector

CO2

Analyzer

24

N20/O2

COMPENSATION

Unless

affect

To

oxide

screen

The

oxide
in
20%

for

The
provides
there

The
provides
there

Finally,

barometric

changes.

compensated

the

ensure

with

menu

N-6000

and

O2

beyond

of

increase

every

first

is

zero

second

is

zero

barometric

the

the

for,

measurement

accurate

oxygen; and

measurements,

selections.

is

calibrated

20%

oxygen.

the

reference

in

O2.

20%

increase

compensation

necessary

error

under

compensation

correction

error

under

pressure

pressure

require

elevated

of

the

concentration

(2)

high

for

low O2

This

is

the

state

An

increase

in

N20.

level

assumes

correction

these

level

factor

for

these

changes

no

levels

the

N-6000

oxygen.

compensation,

default

decreases

in

N20

50%

factor

assumed

assumes

high

levels

assumed

also

user

intervention;

of

oxygen

of

Compensation

mode

the

increases

nitrous

for

high

conditions,

0%

nitrous

conditions.

affect

(O2)

CO2

by a collision

provides

which

where

displayed

oxide

levels

of

O2.

Once

measured

the

and

nitrous

two

levels

levels

COMP. = OFF.

the

of

oxide

N-6000

are

assumes

CO2

value

displayed

and

50%

N20.

and

60%

again,

CO2

automatically

oxide

(N20)

broadening

of

compensation:

user

selectable

the

reference

In

the

by

1.5%

of

CO2

value

oxygen.

When

oxygen. Selecting

when

values.

Selecting

this

correction

this

correction

However,

adjusts

in

the

effect.

via

state

N-6000,

reading
by

1.6%

changes

airway

(1)

nitrous

display

of

0%

nitrous

an

increase

for

every

of

reading

COMP. = N20

is

applied,

COMP. = O2

is

applied,

in

for

these

The

following

conditions,

2.4.1

Standard

The

accuracy

CO2

in

balance

38

mmHg),

errors

2.4.2

Ambient
energy
barometric

CO2
additional

from

mmHg

are

Pressure

barometric

exchanged

values

the

standard

for

paragraphs

as

pertains

Gas

specifications

air

and a barometric

required

Broadening

pressure

reported

residual

every

to

Conditions

(21%

O2),

for

barometric

pressure

in

molecular

is

automatically

on

both

errors

reference

5000-foot

contain

N-6000

for

Compensation

may

change

further

operation.

the

N-6000

at

airway

pressure

pressure

affects

collisions

the

main

be

observed

state

of

in

in-depth

refer

conditions

of

760

(altitude),

measured

alters

measured

monitoring

when

760

mmHg

altitude.

discussion

to

the

following

of

33

°C,

fully

mmHg.

CO2

the

Additional

N20,

02,

by a “pressure

absorption

and a compensation

screen

testing

(sea

level).

spectrum

and

the

reference

These

of

compensation

standard

saturated

corrections

and

broadening”

service screen.

gases

amount

conditions:

(water

water

vapor.

of

is

automatically

at

to

and

standard

test

vapor

and/or

CO2.

pressures

approximately

residual

effect,

In

the

applied

However,

gas

is

pressure

in

which

N-6000,

to

different

+0.5

of

2-5

2.4.3

N20

Collision

Broadening

Nitrous
“collision

absorption
eliminate
causes
standard
correct

both
mixture

2.4.4

Oxygen
exchanged
causes a decrease

Oxide

an

(N2O)

broadening”

spectrum

any

direct

increase

in

can

affect

effect

in

of

CO2.

The

absorption

measured

conditions. A software-selected

for

high

N20,

assuming a gas

the

N-6000

if

O2

Collision

(02)

the

02

can

in

molecular

main

monitoring

compensation

Broadening

affect

the

CO2

collisions

in

measured

conditions. A software-selected

high

O2,

assuming a gas

main

monitoring

compensation

2.4.5

Water

Water

vapor
respiratory
water

N-6000

are
to

vapor

is

calibrated

automatically

verify

calibration,

sereen

option

Vapor

also

has

gas

is

(with a vapor

composition

and

the

is

selected.

Effect

an

effect

at

standard

pressure

to

include

compensated,

CO2

values

airway

the

CO2

measurement

which

of

CO2

energy

infrared

infrared

of

approximately

exchanged

narrow

energy

(user-selectable)

composition

screen

option

measurement

alters

CO2

and

on

is

selected.

the

absorption

of

approximately

by a “collision

(user-selectable)

of

60%

O2

(0%

service

on

CO2

sereen

measurements.

conditions

of

38

mmHg)

this

effect,

while those

reported

and

on

CO2

on

the

by

bandpass

by

of

50%

the

service

-0.75%

02

compensation

N20).

are

compensated

of

33°C,

causes

values

the

service

service

both

in

filter
N20.
+0.8%

N20

N20

screen

spectrum

CO2

In

normal
fully

an

increase

reported

screen

screen

direct

absorption

molecular

used

in

However,

per

10%

increase

compensation

and

50%

are

compensated

broadening”

of

CO2.

per

10%

increase

option

values

for

use,

this

reported

it is

saturated.

in

on

the

are

not.

should

be

of

collisions

the

N-6000

N20

collision

in

option

O2.

CO2

values

effect
O2

collision

in

is

provided

on

gas

mixture

assumed

Under

measured

main

If

applying a dry

used

for

infrared

alters

is

chosen

the

broadening

N20

from

is

provided

reported

for

this

in

which

broadening

O2

from

to

correct

both

the

if

the

that

these

conditions,

CO2

of

6%.

monitoring

comparison.

and

by

to

on

gas

energy

standard

for

N-6000

O2

The

screen

test

gas

a

to

2.4.6

BTPS/ATPS

The

N-6000
temperature
adapter
barometric

conversion

fully

is

measured

pressure.

to

saturated

screen values

2.4.7

Summary:

CO2
water
a

dry

also

CO2

water

values

test

applied

values

reported

vapor

gas

reported

vapor,

Compensation

assumes

and

deep

that

measured

pressure

fully

at

33

°C,

By

convention,

lung conditions

with a water vapor

do

not

have

these

Reported

correction).

is

present

to

the

service

and,

if

CO2

on

the
That

in

the
screen

on

the

selected,

saturated

fully

saturated

of

pressure

corrections

Values

service

is,

CO2

airway

values.

main

monitoring

N20

and

respiratory

(ATPS).

with a water

CO2

values

body

temperature

of

47

applied.

on

the

Main

screen

are
values
adapter

reported

(at

screen

O2.

gases

are

That

is,

vapor

are

reported

and

mmHg,

at

Monitoring

uncorrected

on

the

25

°C).

Corrections

have

at

standard

it

is

assumed

pressure

on

the

pressure

ambient

and

for

BTPS/ATPS

service

all

corrections

airway

that

of

38

main

monitoring

fully

saturated

barometric

Service

screen
for

Screens

are

N20

applied:

conditions

the

gas

in

mmHg,

at

(BTPS):

pressure.

conditions

accurate

and

Oz,

if

BTPS/ATPS,

of

airway

the

airway

ambient

screen

after

37

Service

(including

assuming

selected,

°C,

are

2.5

FACTORY

Each

CO2

sensor

temperatures.

components
calibrated
automatically

and

over

CALIBRATED

is

individually

The

N-6000

electronics

multiple

compensated

temperatures,

SENSOR

factory-calibrated

sensor

is

at a known

by

temperature

over

temperature-regulated

constant

so

that

temperature.

any

deviation

calibration

coefficients

multiple

to

42

°C,

Additionally,

from

gas

concentrations

which

the

42

°C

stored

keeps

the

the

sensor

set-point

with each

and

sensor

is

is

sensor

multiple

optical

factory-

unit.

3.1

INTRODUCTION

This

section

provides

details

of

circuit

SECTION

Circuit

operation.

Analysis

Refer

HI

to

Figure

3-1,

the

overall

bleck

diagram.

i

Oximetry

Sensor

Heater/Motor/IR

CO,

Sensor

LED

Drive

Output

Sensor

Output

Drive

Source | Module

Sensor
Analog

Oximetr

>

>

Mo.

tule.

CO»

Optical

Isolators

»

Serial

Data

isolated

DC

T

i

・

Serial

|
1

|

Power

1
1

I

.

Data

>

Charger

Power

Transformer

Main

Processor

Battery

and

Supply
Å

AC

Isolated

Audio

isolated

Power

Signals

Keyboard

y

Display

—|

Battery

>

>

speaker

|

Serial

Loud-

Port

3.2

CO2

MODULE

The

CO2

module
information
modes

The

thermistor,

and

mainstream

acquires

to

the

send

sensor

sensor

and

non-volatile

Figure

CIRCUIT

main

DETAILS

CO2

data

processor,

information/status.

has

six

basic

memory.

3-1:

Overall

from

the

The

module

components:

AC

Block

mainstream

accepts

an

IR

Mains

Power

Diagram

CO2

sensor

commands

source,

and

from

the

detector,

communicates

processor

chopper

motor,

the

to

change

heater,

3.2.1

Sensor

Operation

The

IR

source

based

on

components: a filter,

The

filter
frequency,
other

molecules

The

airway
tube

and

within

The
path
The
energy

The
can
third

The

the

chopper

as

second

to

detector

be

determined

(dark)

CO2

condensation

because

the

allows

the

gas

the

sensor's

wheel

the

wheel
phase

pass

phase

sensor

the

sensor’s

amount

emits

energy

of

the

only

attenuation

normally

sample

ventilator

light

is

rotates.

is

an

to

the

detector.

output

is

by

provides a zero

temperature

from

forming

output

that

is

energy

energy

it

receives.

airway

gas

of a wavelength

effects

present

is a disposable

circuit.

The

path.

split

into

three

The

first

opening

sampled

comparing

during

is

elevated

on

the

is

affected

providing

the

directed

sample,

due

to

the

in

respired

airway

sensor

sections

phase

each

change

reference

to

airway

by

toward

In

the

the

light

path

and a chopper

within

presence

the

of

gas.

adapter

clips

or

to

phases

the

that

airway

has a reference

no

attenuation.

phase.

in

42°

windows,

temperature.

The

detector

for

recalibrating

C.

There

and

detector.

The

between

the

wheel.

CO2

absorption

CO2

molecules

is

inserted

adapter,

that

are

presented

cell

filled

The

third

amount
output

are

of

CO2

from

the

detector.

two

reasons

to

maintain a stable

detector

are

generates a voltage

source

band

and

to

much

between

putting

the

sequentially

with a known

phase

phase

is

present

one

for

doing

dark,

in

to

detector

detector

pass.

At

greater

the

endotracheal

respired

to

amount

allowing

the

gas

phase

this:

two.

to

temperature

are

this

than

for

gas

the

light

of

CO2.

no

sample

The

keep

three

The

sensor
maximum
sensor

requires

As

the

3.2.2

The

CO2

and

barometric

3.2.3

The

module

stored
with
EEPROM

waveform.
its

internal

power-up

available

reaches

some

motor

CO2

Module

module

Digital

in

U600.

the

main

U608,

EEPROM

A/D

determination

sequence

heater

temperature,

current;

reaches

speed,

Hardware

has

six

pressure

is

controlled

The

microprocessor

processor.

and

the

U603

converter

in

other

is

optimized

output

by

disabling

main

the

heater

the

heater

sections:

can

the

be

is

heater,

is

digital,

transducer/amplifier.

by

U602,

an

80C552

uses

The

microprocessor

sensor

sections

EEPROM.

stores

to

determine

of

calibration

sensor

the

hardware.

to

keep

power

varied

in

software

temporarily

the

demands

re-enabled,

motor

microprocessor,

its

on-board

communicates

The

external

constants

temperature,

©

supply

to

disabled,

followed

control,

serial

port

A/D

for

the

loading

match

on

by

the

and

the

the

power

activation

signal

amplifier,

running

te

communicate

serially

to

converter

module.

barometric

to a minimum.

power

motor

is

supply

of

the

available.

started.

IR

heater,

at

11

MHz.

A/D

converter

is

used

to

digitize

The

microprocessor

pressure, and

The

As

the

This

are

minimized.

source.

source

The

program

asynchronously

U605,

the

sensor

uses

fault

is

3-2

3.2.4

Motor

The

sensor’s

The

sense

signal.
motor.

signal

processor

3.2.5

Signal

The

“bench”
output
A/D

converter. A positive
microprocessor
to

the

3.2.6

Heater

The

heater
The

FET
the

sensor
temperature
regulate
inhibited

active

processor’s

Control

chopper

coil

is

This

signal

The

motor

to

regulate

via

the

Amplifier

hybrid

and

bias

to

sensor

which

output

signal

is

converted

by

it

to

42°

by a comparator

as

the

sensor

internal

motor

amplified

is

control

the

MTRGATE

circuit

the

detector

used

hybrid

speed

consists

to

generate a synchronized

by

to

U607

properly,

bias

set

the

operating

servos

consists

is

filtered by

the

of a PWM

L600

to a proportional

the

microprocessor. The

C.

As a safety

circuit

temperature

A/D

converter

of

two

the

processor

controls

the

equivalent

signal.

contains

so

that

voltage

is

point

sensor

signal

signal

and

C614

software

precaution,

monitoring

reaches

for

fault

fixed

coils

for

synchronizing

the

amplitude

of a 30

the

necessary

its

output

applied

of

to

the

photodetector. A negative

to

be

from

before

voltage

by the

regulates

the

PWM

the

48°

C.

The

determination.

on

the

stator

drive

voltage,

of

the

ms

period.

circuitry

is

zero-referenced

the

sensor

referenced

the

processor

being

to

applied

bench

the

output

feeding

temperature

heater output

and

three

magnets

and

to

processor

drive
The

to

activity

signal

motor

amplify

derived

can

the

and

using a filtered

bias

zero

volts.

switching a FET

to

the

heater.

hybrid.

power

voltage,

This
applied

the

heater

this

voltage

voltage

override

is

available

on

the

rotor.

generate a motor

to

the

chopper

from

the

sense

be

disabled

sensor

in

the

PWM

voltage

power

The

is

to

the

output

by

the

detector

range

for

the

output

is

from

also

applied

transistor.

temperature

translated

sensor

can

will

to

to

be

become

the

clock

the

in

to

a

3.2.7

Source

A

current

located

source

regulator

in

the

voltage

determination.

3.2.8

Barometer

The

barometer
achieved
The
the

3.2.9

On
reset
turns

by

sensing

transducers

processor's

Status

LEDs

power-up,

and

the

on,

indicating a sensor
temperature,
LED

is

turned

Ifthe

CO2

module

exists,

the

RED

formed

sensor.

is

brought

circuit

by

The

source

back

generates a voltage

voltage

differential

internal

the

initialization

allowing

off,

LED

green

and

is

not

will

A/D

LED

sequence

the

sensor

the

green

receiving

flash

U615

and

is

controlled

to

the

microprocessor's

variations

voltage

is

converter

flashes

five

is

warm-up

to

start

LED

is

commands

at a rate

R645

provides constant

by the

proportional

at

the

pressure

amplified

for

translation

times

momentarily,

taking

place.

condition.

measuring.

turned

on.

from

of 2 Hz.

microprocessor

internal

to

the

transducer

and

zero-referenced
to a barometric

After

the

The

light

remains

When

the

main

the

processor,

current

A/D

of

via

Q608

converter

atmospheric

with a constant

before

pressure

indicating

green

sensor

LED

on

is

that

until

or a sensor

83.3

mA
and
for

pressure.

being

reading.

the

flashes,

the

ready

to

to

the

IR

Q606.

The

fault

This

is

current

presented

processor

the

red

sensor

reaches

measure,

fault

condition

source

applied.

to

has

LED

the

red

Ifthe

COz

Ifthe

COz

LED

flashes

3.2.10

LED

module

module

at 2 Hz.

Status

has

no

finds

an

Summary

sensor

internal

connected

fault

to

it,

during

the red

LED

flashes

initialization,

the

at 1 Hz.

green

LED

is

on,

and

the red

Green

Réd

Green

Red

Red

Red

3.3

The

LED

flash

LED

on

LED

on

LED

flash 1 Hz

LED

flash 2 Hz

LED

flash,

OXIMETRY

following

Green

MODULE

discussion

blocks. A detailed

3.3.1

Oximetry

The

module
signal,
and

circuits

The

referred

pulse

in

following

blocks. A more

circuits

of

Module

drives

rate

values

the

host

discussion

detailed

the

module

to

on

BLOCK

is

an

discussion

the

oxygen

as

the

“SAT“

presented

system

for

is

given

discussion

can

be

Reset,

Sensor

Sensor

Sensor

No

System

DIAGRAM

overview

of

major

transducer

signal,

on

the

display

divided

as

of

and

an

each
into

Initialization

Warming

Active

Disconnect,

Communications

Fault

ANALYSIS

of

the

oximetry

functional

and

is

conditioned

monitor.

for

overview

circuit

the

circuit

conditions

This

external

of

block

following

Condition

(Measuring

Condition

or

Condition

module

blocks

the

signal

and

used

information

output

the

module

is

given

major

CO2)

Sensor

and

is

given

Fault

identifies

in

derived

to

derive
is

saturation

serially

conditioning.

and

identifies

in

the

following

functional

blocks:

Condition

major

paragraph

from

the

percentage

coupled

to

major

paragraphs . The

circuit

3.4.

patient.

processing

circuit

This

ο
0ο

0ο 96

9 9

4

LED

Driver

Sensor

Input

Source

Input

A:D

Amplifier

Filters

Conversion

Support

Assembly

Selection

and

Cireuits

|

Synchronous

Detector

Refer
these

to

Figure

circuit

3-2,

blocks.

“Oximetry

Module

Overall

Block

Diagram,”

for

the

logical

relationship

of

Functional
absent
personnel

similar

when

from

in

necessary.

・

En

Power

Option

Selector

Host

Power

Communications

Configuration

Jumpers

circuit

the

quick

layout

JP4

JP5

and

102

block

diagrams

circuit

understanding

to

the

Host

、

Power

`

or

grouped

schematic

κ

Support

Circuits

»

Comm

|:

Converter

Red_ADC

IR_ADC

Figure

3-2:

may

into

of

overall

diagrams

Lines

A:D

Filters

Oximetry

employ a technigue

functional

circuit

ーー

Red

IR

sub

operation.

to

facilitate

Data

and

blocks.

tracing

Control

Module

Overall

Circuit

where

|

id

Saturation

some

components

This

is

intended

These

simplified

signals

LED

Driver

Input

Amplifier

and

Synchronous

Detector

Signal

Input

Source

Selection

Block

Diagram

to

to

diagrams

the

component

==

give

_

are

either

service

are

level

External

Pre-amp

Connector

JP3

JP1

Se

Connector

3.3.1.1

Circuits
necessary

3.3.1.2

Refer
operation.

Oxygen

transducer
red
physiologically

into

Sensors

available
configured

LED

in

Sensor

to

Section

saturation

light

pulses

the

module

are

Driver

this

LED

at

the

not

NELLCOR

to

accommodate

block

develop

sequences

Assembly

2,

“Principles

data

selected

at

the

measurement

modulated

via

the

provided

oxygen

LED

to

develop

of

Operation,”

signals

monitor’s

with

are

patient

emergent

the

transducers.

oxygen

drive

signals

an

oxygen

developed

site.

Sensor

site. A photodiode

light

front-panel

module.

transducers

as

saturation

for

additional

using a NELLCOR

LEDs

energy

sensor

The

module

Preamplifier

well

as

generate

in

the

at

the

site.

connector.

is

circuits

directly.

control
signal

details

alternate

transducer

The

designed

current

at

about

oxygen

photodiode

to

serving

switching

the

measurement

NELLCOR

transducer

infrared

responds

operate

connector

SAT

with

to

sensor

~

energy

to

the

signal

all

currently

JP1

ensure

site.

oxygen

pulses

is

coupled

are

the

and

3.3.1.3

The

signal

Input

SAT

gain
artifacts,
signal

is

accomplished

Amplifier

signal

and

ambient

and

is

conditioned

reduce

or

light,

by

Synchronous

by

eliminate

and

spurious

circuits

the

in

input

the

the

Detector

amplifier

effects

of

electrical

filter

block.

and

ambient

noise).

the

synchronous

interference

Final

analog

detector

(such

things

conditioning

to

provide

as

of

the

motion

SAT

3.3.1.4

The
filter/amplifier

the
circuit

8.3.1.5

The
measurement
in

8.3.1.6

Module

software.

3.4

This

provide
operation
order
circuits
they

Filters/Amplifiers

module

includes

circuits

multiplexed

block.

A:D

Conversion

A:D

conversion

site

the

saturation

Support

Circuits

operations

The

software

DETAILED

section

discusses

qualified

sufficiently

of

logical

and

components

apply

as

support

two

separate

and

associated

SAT

signal.

block

with

calculation

are

OXIMETRY

service

The

digitizes

IR

and

algorithms.

controlled

also

provides

MODULE

the

major

personnel

to

locate

troubleshooting

such

as

functions.

active

gating

next

step

the

two

red

light.

by

an

80C552

diagnostics

CIRCUIT

functional

with

and

repair

methods

the

microprocessor

filter

channels,

circuits

is

to

digitize

pulse

waveforms

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four-phase
represented
represented
original

effect

on

detection

the

patient's

associated

configured

follower.

with a gain

of

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by

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by

the

voltage

the

signal.

filter/amplifier

3.4.1.4

There

а.

Filters/Amplifiers

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b.

IR

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e.

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conditions

pulse

waveform

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resistors

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the

of

1.

comprise

it

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positive

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©

controls

clock

IR

and

LED

level

and

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channels.

circuits

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U10B

mentioned

red

LED

off

times

polarity. A comparison

output

in

of

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signal

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operate
input

this

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times

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the

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two

different

is

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not

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line,

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drive

discussion.

are

inverted

4)

are

permitted

of

Figures

detector

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such

free

detector.

circuits:

by

the

closes

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by

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to

8-8

is

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block:

that

of

artifact

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detector

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switch

result

detector.

pass

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to

the

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is

an

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device

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during

is

that

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voltage

the

detector

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inputs

of

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can

U10B,

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and

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phases 1 and

voltage

values

values

at

their

the

resulting

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IR

and

red

a

3

Refer

to

Figure

this

discussion.

FET

switches

information.
and

red

off

3-5

and

U15A/B

Phases 1 and 3 constitute

time

segments.

processor-controlled

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are

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to

schematic

employed

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operate

operate

the

signal

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gate

control

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input

bus

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red

inputs.

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on

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with

the

and

the

four-phase

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7) for

in

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segments,

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additional

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signal

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phases 2 and

to

LED

drive

input

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details

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control.

not

see

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the

red

4,

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are

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an

open

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follow
after
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after

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During
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level

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signal

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possible
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is

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b.

Refer

discussion.

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10
respond
the

Converter.

the

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one

another

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beginning

us

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IR

ON

the

beginning

us

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the

time

microprocessor

into

the

phase 4 and

level

reason

artifacts

Photodiodes

experienced.

this

IR

Filter/Amplifier

to

Figure

IR

filter/amplifier

Hz and a

to

the

filter/amplifier

period

on

the

of

phase 1 and

signal

OFF

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red

continues

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for

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total

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level

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signal

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strobes

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the red

only

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exhibit

only

3-5

and

'

gain

of

output.

that

phases 1 and 2 of

bus,

the

processor

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the

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continues

level

into

the

U15B

70

for

filter/amplifier.

an

the

error

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circuit

4.

twice.

us,

or

to

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1s

or

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last

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during

schematic

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The

the

exponential

last

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from

the

is

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active

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patient

IR

filter/amplifier

the

to

us

pulse

the.

2710.6

strobes

for

filter/amplifier.

for

IR

filter/amplifier.

the

2710.6

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first

end
second
the

end

us

of

each

first

112

change

of

the

measurement.

diagram

low-pass

cannot

modulation,

U15A

70

lis,

70

us,

Hz

saturation

strobe

of

phase

3.

gate

control

of

phase

phase

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(sheet 5 of

type

track

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pulse

or

or

Hz

saturation

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to

the

end

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The

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gate

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the

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pulse

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gates

pulse

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energy

output,

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high-frequency

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waveform

112

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comes

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filter/amplifier

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to

from a sudden

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dB

the

output

signal

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phase

phase

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sensor

roll-off

pulse

2.

follow

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last

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112

us

last

70

photadiade

the

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details

LED

pulse

patient's

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ON

pulse

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one

another
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of

after

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point

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on

beginning

RED

ON

the

beginning

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OFF

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settling

state

settled,

during

at

this

approximately

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waveform

to

the

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112

last

last

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bus,

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change

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at

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input

signal

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us

space

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in

the

same

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filter/amplifier.

measurement
patient

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gain

offset
intensity
result
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positive

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+2.5

pulse

pulse

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the

of

the

patient’s

voltage

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mV

input,

The

site.

modulation

pairs

resulting

at

the

measurement

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pulse

the

waveform

which

level,

to

the

IR

filter/amplifier,

2).

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This

leaves a 476

overall

The

are

expressed

dimension,

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pulse

individual

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low-frequency

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does

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signal

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at

the

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pulse

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first

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peak-to-peak

the

Beers-Lambert

and

color).

the

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filter/amplifier

next

step

move

as

explained

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period

pair

the

of

two

coupled

pulse

is

to a negative

(3

until

are

proportional

amplitudes

measurement

identical

to

waveform

Law,

to

digitize

positive

above,
and
the

the

amplitude

output,

level,

offset

is

two

4)

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gated

next

pair

to

are a function

site.

filter/amplifier
last

stage,

is

proportional

of

which

the

is

labeled

waveform

the

final

of

0.05

70

of

IR

the

emergent

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the

used

amplifier

V.

at

us

pulses

into

the

red

pulses

of

the

stages,

has a gain

due

patient’s

to

calculate

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must

in

the

A:D

the

output.

separated

filter/amplifier

is

gated

light

at

low-frequency

each

to

the

pulse

oxygen

always

circuits.

stage

input

by

into

the

the

having

of

1.

The

average

waveform

be

at

To

has

a

a

a

IR

DC

LED

is

a

a

3-13

с.

Red

Filter/Amplifier

Refer

to

Figure

discussion.

The

red

filter/amplifier
approximately
input,
pulse
coupled

The
by a 112
filter/amplifier

pulses
emergent
low-frequency

but

waveform

to

input

ps

are

does

the

A:D

signal

space

gated

light

patient

10

respond

in

at

3-5

and

the

circuit

Hz

and a total

to

the

at

the

filter/amplifier

Converter.

to

the red

(phases 3 and

the

same

into

the

red

the

measurement

pulse

schematic

is

low

filter/amplifier,

4).

manner.

filter/amplifier.

modulation

diagram

an

active

gain

of

frequency

output.

The

next

This

site.

low-pass

8.

The

patient

as

two

leaves a 476

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and

(sheet 5 of

type

filter

cannot

pulse

The

red

explained

phases

The

overall

individual

artifact

at

7)

for

additional

with a 3

modulation,

filter/amplifier

previously,

(1

and

us

time

pulse

pulse

the

measurement

dB

track

the

2)

are
space
amplitudes

pair

amplitudes

roll-off

high-frequency
reproducing

pulse

is

gated

until

two

into the

site.

details

70

the

are

during

point

at

the

waveform

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pulses

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next

proportional

are a function

this

LED

patient’s

output

separated

pair

of

pulse

is

red

to

the

of

the

These

gain
offset
intensity
result
saturation.

The
level,
the

+2.5

3.4.1.5

Refer
during

The

various

C-LOCK
host
module

a

pulse

of

approximately

of

the

at

of

the

pulse

waveform

because

waveform

mV

input,

Control

to

Figures

the

SpO2

control

instrument,

to

timing

reference.

pairs

are

coupled

2.
resulting
the

factors

the

does

which

following

measurement

Is a hard-wired

satisfy

low

measurement

expressed

at

the

next

step

not

move

guarantees a minimum

Signals

3-3, 3-4,

discussion.

signals

from

the

are

an

software

to

the

The

signal

frequency

site.

in

the

red

filter/amplifier

is

to

digitize

into a negative

3-5,

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the

process

external

is

listed

timing

requirements

first

of

two

is

then

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patient

The

Beers-Lambert

controlled

and

pulse
ECG

pulse

peak-to-peak

the

waveform

voltage

schematic

defined

(active

monitor.

identical

to

waveform

amplitude

Law

output,

region,

positive

by

below:

necessary

offset

diagram

several

high)

transmitted

The

rising

filter/amplifier

the

last

stage

is

proportional

of

the

and

is

used

labeled

in

RED,

the

measurement

the

final

of

0.50 V at

(sheets 4 and 7 of

logic

lines

to

edge

of

to

perform

pulse

stages,

having a gain

due

to

patient’s

to

caleulate

must

amplifier

the

from

the

saturation

this

pulse

recognition

pulse

・

be

at a positive

system.

stage

output.

7)

for

microcontroller

is

each

having

of

2.

The

the

LED

waveform

oxygen

voltage

To

ensure

input

additional

module,

used

by

the

using

a

DC

that

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details

U5.

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via

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is

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the

as

a

The

time

(fast
regarding
for

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seconds

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controls

3-14

the

oceurrence

data)

the

source

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of

message

of

after a real-time

result

transmission

an

ECG

timing

input

over

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synchronization,

message

of

microcontroller

of

the

IR

pulse

the

bi-directional

input

output

on

and

off

can

also be

the

module

is

received.

PWM1/

levels

transmitted

communication

will

not

ANDed

into

the

IR

to

the

module

link.

To

prevent

accept

with

hard-wired

output

CMT1.

filter/amplifier.

using

the

confusion

logic

IRGATE/

real-

inputs

IRLED/
level

at

U4B

From

microcontroller

and

the

direction

output

of

current

CMSR4.
applied

IRLED/

to

the

controls

sensor

the

LEDs.

selection

of

the

LED

drive

REDGATE/

REDGATE/

REDLED/
level

at

SATIN
through

3.4.1.6

Refer
additional

A:D

conversion

“output.

filter/amplifier
waveform
configuration

RESISTORS.

U20's

the

channel
microcontroller
circuits.

controls

From

U4A

and

From

U10B.

A:D

Conversion

to

Figure

details

Channel 1 accommodates

from

of

output

bit

present

Is a result

the

microcontroller

the

current

microcontroller

3-6,

“A:D

during

is

accomplished

channel.

the

IR

quad

stream

on

U5

for

of

transmission

Conversion

this

Channel 2 accommodates

filter/amplifier

FET

switch

multiplexing

the

ADCDATA

conditioning

microcontroller

of

the

output

direction

output

discussion.

by a dual-channel

either

CMSR5.

applied

CMSR3.

Circuits,”

VCAL1

channel.

U24A,

is

determined

line.

prior

B,

to

output

red

to

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transmission

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on

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sensor

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the

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voltage

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controls

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signal

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with

output

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the

selection

synchronous

diagram

that

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pulse

voltage

are

is

is

coupled

host

or

determined

controlled

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system’s

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of

detector

(sheet 6 of

waveform

the

analog

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by

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display

the

LED

action

7)

for

from

the

pulse

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signal

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to

processing

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serial

red

ον

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V

RESISTORS

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3.4.1.7

Support

Circuits

Support

a.
b.

a.

Communications

Refer

to

details

In
signals

CTS

to

RESET

RXD

TXD

The

checked

No

during

addition

present

suspend

communication

transmission

circuits

Figure

for

include

Communications
Processor

3-7,

the

to

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supply

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the

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the

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Circuits

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of

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processor

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the

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the

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8.5.1

Microprocessor

Microprocessor
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stored

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A16

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8.5.2

Power

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PROCESSOR

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details

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11

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DETAILS

3-1)

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latch

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the

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diagrams

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discussion.

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Reset

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and

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the

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of

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be

set

on

power-up.

to

Q301

to

maintain

the

user

may

press

D203.

If

the

button

U208C, a clock

requests

it

when a low

low;this-clears-U207A

A/D

converter

on

to a 0-5 V signal that

This

3.9
the

battery

set

point

device
volts
voltage

from

is

is

10

low

detects

voltage

divider

enough,

volts,

and

the

600

system

the

is

pulse

U102.

if

formed

plus

D203,
rectified

ms,

causing

AC

This

Through

power.

front-panel
held long

will

be

generated

battery

through-D211.

Switched

is

routed

the

battery

reference

by

R225

pin 6 of

or

minus

pulse

D204 _ |

power

enough

system

to

the

voltage

U221.

and

U220

0.5

is

3-17

Resetting
U200,

low.

informing

At

this

discharges

3.5.3

Reset

On

power-up,

by

holding

by

U208F
charges
RESET
neither
U209
action
dog

some

C209,

low.

of

approximately 1 second

again

timers

intervention

U207A

point,

through

and

Watchdog

C209

RES

and

is

after

With

the

watchdog

causes

again.

causes

it

C204

low.

used

that

power-down
is

R203

is

initially

U200

to

reset

U207A

and

approximately

RESET

systems

RESET

With

this

this

cycle

the

only

R204,

discharged

takes

both

low,

C207

later,

to

go

done,

will

pin 6 to

is

remaining

removing

RESET

watchdog

100

and

is

satisfied

RES

low

and

C209

repeat

go

high,

imminent.

base

bias

by

D210,

high

while

circuits

ms

RES

is

C208

are

before

is

driven

discharge

is

once

again

continuously.

initiating

Resetting

drive

for

from

Q200

which

high

free

either

low

its

via

enough

to

via

C207

free

initially

RES

D205

start

C207

D206,
and C208,
to

an

NMI

U207A

Q200.

causing

input

and

to

charging

or

charge

(nonmaskable

also

causes

After

about 1 second,

the

puts

U200

is

LOW.

D208.

After

satisfy

U200.

through

C208

reach

which

discharges

effectively

through

U207A

relay

to

into a reset

This

signal

power-up

This

R206

the

threshold

resetting

R207.

interrupt)

pin 5 to

C204

drop

out.

condition

is

inverted

R207

in

turn

takes

and

R209.

value

C209.

This

the

Unless

there

to

go

If

of

watch

is

Watchdog

generated

approximately
first
U212B
FAILED
divide-by-two
This

trips

for

reset

pulse

ever

reaches

signal

FAILTONE

the

600

divider.

microprocessor

The

two

independent

C206.

The

first

The

second

and

key

communicate

If

P209
timer
timer

3.5.4

Battery

The

battery

battery

Power
If

system

draw

PCB.

is

will

to

allow

backup

to

U204

its

power

watchdog

U200

properly

shorted,

be

disabled.

testing

Backup

voltage

power

forward-biases,

are

counted

power

ms.

is

not

the

goes high,

signal

has

encountered a system

by

U212B.

control section

Since

the

counted

This

eighth

this

device,

is

routed

by

count,
removes

watchdog

watchdog

the

voltage
(S-RAM)

is

applied,

from

providing

timer

and

to

first

If

the

and

is

applied

for

the

timer

is

connected

U102

are

U102,

watchdog

P211

is

watchdog

Memory

to

U204

is

supplied

D213

+5 volt

backup

is

This

device

reset,

pulse

U212B.

U210A

when

to

the

described

Each

the

allowed

main

above.

to

the

microprocessor

reset

is

clocked,

clear

condition

to

speaker

failure.

timers

or

are

connected

to

in

constant

should

U102

timer

shorted,

satisfied

to

U200

U102,

communications,

fail,

will

be

disabled.

this

will

pulse counter.

Retention

U222, a micro-power

and

U219

(Real-Time

via

D213

and

D214,

is

forward-biased

supply.

power

As

from

the

system

the

is

reset

on

During

transition

latching

from

run,

divides a 3,906

amplifier

by

positive-going

via

U207B,

which

the

controls

system

If

keep

pulses

shunt

regulator,

Clock)

which

and

D214

power

storage

battery.

power-up

power-up,

is

only

after

power-up

the

FAILED

U212A,

and

informs

edges

which

the

front-panel

and should

will

be

P210

is

shorted,

from

satisfying

to 3 volts

are

low-voltage

is

reverse

falls

off,

D213

via.

the

POR

signal

POR

is

held

active

about

100

ms

wide,

is

counted,

signal.

which

Hz

clock

the

applied

forms a single-bit

When

is

configured

down

user

that

to

C205

to

output

numeric

U200

fail

to

reset.

the

second

the

first

watchdog

via

R228.

U222

regulates

as set

by

R229

and

drop

Schottky

biased,

causing

U204

reverse-biases

for

the

and

if

the

as

a

1953

Hz.

the

and

port.

displays

watchdog

a

R230.

diodes.

to

and

D214

With

system

On

power-down
causes
low.

3-18

the

power

Q204

voltage

applied,

loses

on

Q204’s

Q204

is

drive

when

collector

forward-biased

the 5 volt

to

fall

off

sharply

supply

by

U221,

has

and takes

which

dropped

the

is

set

to

approximately

to

approximately

PFAIL

input

to

4.5

U219

3.9

volts.

volts.

(RTC)

This

PFAIL

to

off
during

8.5.5

U213

is

the

RAM,

state,

system

Internal

is a guad

also

maintaining

keeping

communications
CO2

And

SpO2
U217.
RS-232

C215.

needed

U217

generates + and —10

port

from

The

remainder

to

meet

connected

PFAIL

reset

conditions.

and

External

UART

between

circuit

the

PCBs,

system

of

RS-232

to

U204’s

data

low

CE2

integrity.

until

the

Serial

(Universal

U200

Asynchronous

and

and

the

Volt

+5

volt

U217

provides

input/output

line;

when

During

reset

reset,

cycle

Communications

the

front-panel

rear

panel

RS-232

supplies

supply

via

the

necessary

needed

an

infernal

specifications.

this

line

Q205

is

complete.

Receiver

numeric

connector.

to

generate

level

goes

low,

further

conducts

This

to

further

Transmitter).

display

and

The

the

bipolar

charge

pump

translations

accesses

effectively

enhances

It

provides

key

PCB

RS-232

port

signals

that

uses

and

current

are

hold

9204

data

processor,

is

buffered

needed

C212,

C213,

limiting

inhibited

in

the

integrity

the

by

by

the

and

Serial
PCBs,
lights
which
circuit

saturated,

pulled

communications

is

accomplished

when

the

applies

of

the

optocoupler

the

low.

Communications
and

U208E.

The

quad

UART
power
(EEPROM).

3.5.6

The
buffers.

during
enables
accessed

Power

NTKEPWR

apply 5 volts

control,

Each

Graphical

front-panel

This

is

battery

U216’s

by

PCSDISP

is

applied

line

to

input

data

drive

current

data

output

with

the

also.

provides

FLASH

of

these

Display

graphic

needed
operation.
outputs

to

the

low.

This

the

graphic

to

the

CO2

and

through

line

to

four

is

the

low.

identical

buffer

provides a faster

line,

which

numeric

display

additional

memory

display

because

and

going

graphic

program

circuits

connects

the

The

buffers

allows

low.

display

is

power

U232B

activates a FET

display.

SpO2

PCBs,

optocoupler

This

in

turn

transistor.

turn

is

normally

and

VO

capability

voltage

discussed

to

the

to

the

are

enabled

to

control

by

driving

switch

which

causes

The

off

response,

held

high

key

PCB

enable,

below.

system’s

graphic

by

taking

the

Q202

located

are

patient-connected

circuits.

the

optocoupler's

68-ohm

When

through

processor

for

such

power

bus

via

display

U232A’s

enable

into

line

saturation,

on

the

The

LED

pull-down

the

buffer

the

is

buffered

.

things

source

U215

may

sensing,

and

be

input

of

U215 when

Power

isolated

in

the

optocoupler

transistor

resistor

in

to

the

transistor

4.7K

pull-up

with

as

the

U216,

removed

high;

which

pulls

resistor,

U216B,

graphic

and

control

which

to

conserve

this

in

the

display

the

Supply-Charger

circuit

turn

on,

emitter

is

is

U208D,

display

of

U214

are

tri-state

power

turn

is

PCB

to

3.5.7

.

U214

device

serial

EEPROM

is

an

is

accessed

number

electrically

serially

(if

original

erasable

from

board),

programmable

port

pins

on

and

total

ROM

U213

hours

that stores

and

stores

in

operation.

such

the

data

user's

as

default

user

default

settings.

settings,

The

3-19

3.5.8

FLASH

The

firmware

that

do

not

need

to

be

performed,
responsible
programming,
power

turn

3.5.9

from

driven

Real-Time

Memory

is

stored

to

be

removed

which

for

accepting

U218

supplies

unregulated

from

U213.

Clock

in

U201

and

U203.

from

the

enables a small

completely

the

supply

12

VSW

new

volts

via

These

circuit

portion

software

needed

Q203,

devices

to

accept a new

of

software

via

the

for

reprogramming.

which

is

are

electrically

program.

to

remain

rear

driven

panel

into

saturation

reprogrammable

U201

allows a partial

resident.

RS-232

U218

This

connector.

receives

via

software

During

its

primary

Q201,

which

devices

erase

is

is

System
primary
U222,
then

time

storage

which

internally

XTAL202,

C218

while

3.5.10

Audio

Timer 1 of

output
goes
converter
voltage
This

C271.
a

3.5.11

The

turned
mains

3.5.12

enable

low.

output

signal

The

bridge

Charging

front

on.

transformer.

Patient

The

for

amplifier

is

provided

battery.

also

switches

which

observing

Generation

U200

is
input.
outputs

the

value

from

is

then

low

pass

Indicator

panel

Q300

charging

detects

Isolation

by

The

regulates

power

over

is a 32.768

the

buffered

used

to

generate a selected

U230

is a tri-state

of

U230

latched

the

ladder

AC-coupled

filter

serves

that

drives

LED

whether

This

signal

Power

U219.

battery

to

the

kHz

are

into

network

via

the

is

Supply

When

is

regulated

to

the

system

crystal.

32.768

8-bit

connected

U230.

C225

only

to

rear-panel

driven

mains

is

also

available

the

unit

system

+5

The

kHz

SRAM

volt

crystal

signal

frequency

latch

to

an

As

the

varies

slow

to

between

U231

the

mounted

by

Q212, which

power

is

is

powered-down,

down

to 3 volts

for

backup.

supply.

may

at

U219

be

TP1.

trimmed

square

that

holds a value written

R-2R

square

ladder

wave

zero

network

from

volts

via a low-pass

square

wave’s

speaker

receives

applied

to

U200

to

the

via

unit

U213

U219

receives

by

the

micropower

When

derives

the
its

for

wave

that

that

U200

gates

and

the

filter

formed

leading and

directly.

base

drive

by

looking

and

D201.

its

power

is

timebase

timing

is

provided

by

serves

accuracy

U200 when

as a D/A

U230,

programmed

by

R263,

trailing

via

D201

for

AC

power
shunt

from

regulator
applied,
from

to

U230's

PCSVOL

the

resultant

D/A

R264

edges.

when

from

the

the

U219

via

value.

and

U231

Q300

is

is

Isolated
cireuit

flyback

signal
secondary

set

by

C228

62.5K

U213.

Secondary
regulated

:

unregulated
—
—42

power

PCB.

configuration.

back

+8

the

operating

coupling a divided

for

U233.

Hz

signal.

regulation

down

volt

supply.

volt

supply

3-20

U233

to

U233,

volt

is

supplied

is a current

which

supply

voltage

system

This

reset

The

isolated

from

the +8 volt

U236

and

for

the

to

the

CO2

mode

Transistor

is

of

Q211

sets

the

accomplished

the

secondary

clock

synchronization

power

is

supplied

by

supply

U237

provide + and —15

CO2

PCB

is

and

SpO2

switched

is a sense-FET

current

by

+8

supplied

pulse

supply

conventional

via

U235,

filtered

by

subsystems

power

supply

switching

current

volt

by

modulating

supply.

U211

resets

may

be

disabled

linear

The

volt

C243.

via a power

controller

that

point

of

The

via

C230

the

R-C

regulators.

—5

volt

supplies

supply

that

provides a mirrored

T200.

Voltage

optocoupler

switching

to

R-C

timer

by

saturating

frequency

timing

and

The

supply

for

is

the

SpO2

regulated

located

drives

regulation
U239.

components

forces

Q210,

+5

volt

PCB.

T200

current

R291

is

set

it

to

lock

which

logic

by

U238

An

unregulated

on

the

via

Q211

output

of

the

is

at

R277
to

is

supply

from

main

ina

used

to

62.5

kHz

and

the

driven

is
the

by

8.5.18

Front

Panel

Display

Controller

U102

is a programmable

the

front-panel
provided
segment
decode
low,
selected
When a key

which

As
used

used
briefly,
by

As a participant

watchdog

computer
watchdog

an

D100

by

is

driven

which

which

in

display

senses

mentioned

to

read

to

detect

all

LED

U102

to

determine

control

for

trip.

orderly

provides

U103

display
turn

is

the

previously,

the

an

fashion.

power-down.

dual-color

which

by

Q112.

should

drives

to

the

+5

pressed

key

and

switch

battery

if

any

of

current

if

in

the

watchdog

system.

extended

The

system

isolation

single-chip

LED

displays and

is a seven

Segment

be

selected

one

of

volt

supply.

the

associated

depress

U102

voltage

the

display

returns

the

segment

If

U102

period

reset

of

the

power

microprocessor

section

open

current

during

the

transistors

The

display

display

and

informs

also

contains

via a voltage

segments

through R102

lit.

system

should

of

signal

time

is

switch

U102

ever

it

will

routed

signal

programmed

to

scan

the

key

collector

limiting

the

multiplex

Q100-Q109

drive

is

the

an

on

divider

fail

to

Darlington

is

provided

into

signals

selected, a common

main

microprocessor

PCB

8-bit

on

the

light.

On

causing a slight

provides a watchdog

fail,

or

should

shut

down

and

to

U102

so

that

so

that

it

can

to

PCB

for

by

R115-R122.

cycle

and

saturation.

also

A/D

converter.

main

circuit

power-up

voltage

healthy

it

fail

to

cause

the

the

entire

be

monitored

provide

key

the

presses.

transistor

drive

the

This

connect

line

of

the

is

the

This

PCB.

each

segment

drop.

This

signal

communicate

system

system

by

multiplexing

Segment

array.

U100

The

and

drive

eighth

U101

appropriate

connects

key

driven

the

switches.

back

to

event.

converter

Additionally,

is

illuminated

voltage

to

to

reset

resets

U102

with

the

main

the

via

together

to

detect

is

a

for

is

output

U102

is

it

is

read

main

in

for

3.6

POWER

3.6.1

Power

The

Power

battery

SUPPLY-CHARGER

Supply-Charger

Supply-Charger

charger,
synchronization
Supply-Charger

3.6.2

AC

Rectifier

The

power

bridge

output
driver
frequency
reverse
labeled

The

output

battery

pin

1,

through

transformer's

rectifier

is

fed

directly

and

is

configured

is

set

blocking

VBAT

current

via

R326,

which

connects

blocking

+5

volt

input

circuitry.

schematic

and

+12

D303,

and

to

at

66 k HZ

diode

D307

on

schematics.

is

limited

(0.2

O,

the

diode

Theory

PCB

logic

and

diagram.

volt

Battery

AC

secondary

6800

battery

as a buck

(nominal)

(and + term

at a nominal

1%, 3 W),

2.5A

rear-panel

D308

to

PCB

of

Operation

contains

display

The

schematics

Charger

LF

filter

charging

converter

via

current

the

common

CIRCUIT

these three

power

voltage

(20

capacitor

switching

with a 330

C305.

The

of

the

battery)

500

mA

limit

fuse

to

of

power

DETAILS

basic

circuit

supply,

of

these

VAC)

C303.

and

the

circuits

is

input

The

regulator

pH

(L300)

output

to

set

is

set.

via

potentiometer

control

resistor.

the + terminal

switching

blocks:

analog

are

via

nominal

U301.

output

at

+14.25

maximum

VBAT

of

the

relay

portion

shown

P303

+25

This

charge

is

fed
battery.

RY1.

AC

rectifier

of

C-LOCK

on

the

to

.8

ampere

volts

DC unregulated

device

has a built-in

inductor.

volts

at

the

R312.

This

current

from

the

It

is

and

27048,

full-wave

The

cathode

voltage

to

PCB

via

also

connected

+12

volt

ECG

Power

NPN

switching

of
is

the

P304

3-21

Unregulated
switched
Supply
through

Base

LOW
NPN
secondary
and

3.6.3

voltage

charger

PNP

current,

by

MAIN

transistor

voltage

coupled

+5

Volt

DC,

during

VSW

PCB

switching

for

Q301

PCB

Q300.

is

to

base

Logic

and

AC

(either

and

via

transistor

turn-on,

control

Q300

present.

of

Q300.

Display

operation

VBAT

P300

or

to

Q301.

is

provided

pin

P300

is

turned

That

AC

Power

is

also

diode

unregulated

the

Main

through

pin

9.

AC

on,

pulling

is

rectified

Supply

coupled
DC)

Processor

R314

on/off

power

AC

P300

via

D304

to

to

the

PCB.

.

when

recognition

pin 7 low

and

RY1

rest

RY1’s

PWRON

D305,

common

of

the

coil

when

filtered

°

via

power

is

energized

control

is

provided

D309.
circuits

line

RY1

from

is

by

AC transformer

by

RC

R308

supplies

on

Power

VBAT

switched

turning

and

C304,

on

Energizing
as

the
maximum
limit

The operating

is

fixed

FET

Q303,

its

gate
Processor
of

+10 V (derived

The turn-on
the

heavy

than

display

3.6.4

Power
regulator.
to

divider

gain

buffer

diodes

RY1

battery

charger.

output

value

is

about

frequency

by

divider

fed

by

voltage

PCB

control),

time

load

demanded

the

+5.0 V supply’s

power-up

C-LOCK

for

QRS

quad

U302's

R301.

and

D300

and

applies

current

R318

the

is

low

from

of

cycle.

Sync

operational

input
The
U300B

D301.
for A and B sections
point

so

that a negative

of

U300B,
peak
positive-going
value.

to

CINT

D302,

the

R304,

next.

pulse,

is

connected

This

input

voltage

The

differences

is

much

4.5

amperes,

is.set

by

and

R319.

+5.0 V supply.

and

the

FET

Q302

is

turned

VSW).

approximately

by

the

display

current

Input

limit

Circuit

amplifier

voltage

input

peak

comes

is

then

follower.

The + inputs

and

R325,

R310

voltage

C301,

sets

CINT,

R305,

the

threshold

when

to

the

supply

Main

to

the

+5

volt

are:

the

operating

higher,

C311

Vacuum

is

90

and

A303

off.

off

ms

value,

U300

at

2.5

current

fluorescent

gate

voltage

When

and

gate

is

determined

during

This

is

developed

amperes

limit by

NTKE

its

turn-on

heavy

from P302, a rear-panel

AC-coupled

The

of

U300A,

for

for

and

U300C)

the

input

Processor

through

divided

B,

section

U300

for

comparator

signal

input

and D are

D.

These

is

not

stores

exceeds

PCB,

switcher

frequency

continuous,

R316

display

is

controlled

PWR,

voltage

by

is

R327

to

load

.

by

U302, a three-terminal

C300

to

is

clamped

biased

dividers

needed. The

the

peak

U300D.

the

via

P300

circuit.

(0.25

power

by

P300

pin

allowed

and

less

than

lasts

for

miniature

two

parallel

to 4 volts

to

set

peak

value

of

The

comparator’s

threshold

pin

8,

The

basic

is

higher,

and

the

O,

1%, 3 W).

is

switched

NPN

Q302,

10,

is

to

rise

C314.

This

4.0

amperes,

about

20

phone

circuits,

+4.0 V by

the

amplifiers’

follower

the

C-LOCK

set

by

for

further

circuit

at

95 k Hz,

nominal

Output

by

When

brought

to

D313's

timing

which

to

30

ms

+8.0

jack,

U300A

by

back-to-back

dividers

circuit

input

output

the

previous

processing.

is

the

same

current

'

voltage

N-channel

Q302

is

low

(via

Main

zener

value

acts

to

is

less

during

volt

through

R300

unity

zener

R302,

R303

operating

(composed

from

one

produces

peak

on,

keep

the

a

3-22

4.1

INTRODUCTION

The

N-6000
institution.
8,

“Troubleshooting,”

resolving

4.2

CLEANING

reguires

Nellcor,

them.

no

routine

however,

discusses

INSTRUCTIONS

Routine

service

recommends

potential

other

SECTION

IV

Maintenance

than

that

which

replacing

difficulties, their

the

monitor's

is

mandated

possible

by

battery

causes,

the

operator's

every 2 years.

and

suggestions

Section

for

Caution:

To

clean

the

top,

bottom,

its

accessories.

chassis.

4.3

CHANGING

The

N-6000
indicated
voltage

1.

2.

8.

4.

5.

setting:

Turn

Open

blade

Set

housing.

Orient

Orient

Do

not

immerse

the

N-6000’s

and

Do

MAINS

operating

by a white

the

Mains

the

power

screwdriver

aside

the

the

selector

the

indicator

the

surfaces,

front

surfaces

not

allow

VOLTAGE

voltage

marker

AC

ON/OFF

entry

or

similar

cover/fuse

card

pin

N-6000

any

must

located

module

block

so

so

in

dampen a cloth

lightly.

liquid

INPUT

match

near

switch

cover
tool.

assembly

that

the

that

it

points

liquid

Do

not

to

penetrate

the

the

to

the

(located

and

desired

or

use

caustic

with a commercial,

spray

switches,

local

mains

AC

mains

OFF

position

next

pull

the

voltage

up

when

or

pour

AC

power

to

the

voltage

is

readable

the

desired

or

abrasive

nonabrasive

any

liquid

connectors,

power

and

power

ratings.

cord

receptacle.

then

cord

selector

at

voltage

disconnect

the

cleaners.

cleaner

directly

or

connector)

card

bottom.

is

on

openings

The

voltage

To

change

the

straight

readable

and wipe

the

N-6000

in

the

setting
the

power

using a small

at

out

the

cord.

of

the

bottom.

or

is

6.

7.

8.

Insert
the

Verify

Changing

Replace
voltage.

the

power

that

voltage

cord

the

the

the

power

selector card

connector,

proper

Fuse,”

fuse

in

entry

and

is

installed.

this

section.

module

back

the

edge

cover,

into

the

containing

If

the

then

housing,

fuse

needs

verify

that

printed

the

desired voltage

to

be

replaced,

the

indicator

side

of

pin

the

card

first.

refer

shows

facing

to

“Replacing

the

desired

toward

or

4-1

4A

REPLACING

To

replace

or

OR

change

CHANGING

the

fuse

THE

FUSE

arrangement

from

North

American

to

European

Fusing:

1.

2.

Disconnect

Open

the

Loosen

Remove

Change

the

the

the

European

operating

Insert

Tighten

fuse

screw

the

power

screw

fuse

fuse

fuses

on

220

block

and replace

AC

entry

by

block

or

are

V~.

and

power

cord.

module

two

turns

by

sliding

fuse

arrangement

required.

slide

Fuse

cover

by

using a small

counterclockwise.

up,

then

as

Replace

back

the

block

cover.

onto

Jumper

the

screw

bar

away

shown

“dummy”

and

blade

screw

from screw and

in

Figures

fuse

4-1

in

the

pedestal.

lifting

and

4-2.

neutral

driver

up

Note

(lower)

or

any similar

from

the

that

two

holder

tool.

pedestal.

when

Cover

Figure

4-2;

Jumper

European

bar

Fuse

Fuse

Arrangement

5.1

OVERVIEW

This

section
instrument
in

loss

or

damage

contains

should

not

be

available, a suitable

through

To

must

Department
the

5.2

If

available,

1.

2.

Nellcor’s

facilitate

be

issued

RGA

number.

REPACKING

Place

monitor

with

packaging

Label

carton

the

before

for

use

Technical

repair

an

RGA

IN

the

in

with

Packing

instructions

packed
covered

carton

or

the

ORIGINAL

original

tape.

carefully;

by

should

Services

replacement

instrument

number.

carton

original

shipping

plastic

SECTION

and

Shipping

for

returning

failure

the

Nellcor

be

used.

Additional

Department.

process, a returned

is

returned.

Be

sure

to

mark

CARTON

and

packing

foam

and

return

the

N-6000

to

follow

warranty.

Contact

the

materials.

packaging

addresses

V

Instructions

for

repair

the

instructions

If

the

original

packing

shipping

and

and

materials

goods

authorization

Nelicor's

carton

Pack

the

place

in

RGA

number.

or

replacement.

in

this

shipping

may

Technical

and

any

monitor

shipping

The

section

carton

be

(RGA)

is

purchased

number

Services

shipping

as

follows:

carton.

Seal

may

not

forms

carton

result

with

5.8

REPACKING

If

the

original

1.

Place

the

2.

Locate a corrugated

3.

Fill

the

4.

Place

the

5.

Seal

the

6.

Label

carton

IN

carton

monitor

bottom

unit

carton

NEW

CARTON

is

not

available,

and accessories

cardboard

of

the

carton

on

the

layer

with

packing

with

shipping

shipping

with

of

packing

tape.

and

use

the

following

in

plastic

carton

at

least 2 inches

material

return

addresses

bags.

with

and

procedure:

at

least

of

packing

fill

the

box

and

RGA

200

psi

material.

completely.

number.

bursting

strength.

5-1

6.1

INTRODUCTION

This

section

troubleshooting.

6.2

DISASSEMBLY

includes

procedures

Refer

to

PROCEDURE

Figure

Disassembly

for

disassembling

6-1

when

SECTION

reading

VI

Guide

the

N-6000

this

procedure.

when

required

for

testing

or

Tools

Note:

without
next,
accessible.
way
replaced

6.2.1

1.

2.

3.

4.

Required:

This

removing

and

to

remove

first

Removing

Disconnect

Place

Remove

Turn

rear.

procedure

then

the

The

AC

the

when

Instrument

power

instrument

screws

instrument

Small
Medium
Small

1/4-inch
5/16-inch
5/16

open

is

listed

the

assembly
Oximetry
power

Power

input

Supply-Charger

reassembling

cord,

upside

from

instrument

over,

cross-head

cross-head

flat-blade

nut

driver

nut

driver

end

wrench

in

order

listed

in

and

CO2

assembly

the

Cover

sensors,

down

on

pull

handle

screwdriver

screwdriver

screwdriver

of

disassembly,

the

prior

step.

subassembly.

must

be

removed

PCB.

The

instrument.

and

other

external

bench

cover.

side

top.

of

cover

with

magnetic

with

magnetic

but

some

The

cover

Other

assemblies
from

transformer

connections

away

from

tip

tip

assemblies
must

be

may

the

rear

panel

must

be

from

chassis,

may

removed

then

be

and

removed

instrument,

and

slide

be

removed

first,

removed
lifted
last

cover

the

out

and

off

battery

if

of

the

to

the

6.2.2

Removing

Note:

Removing

the

real-time

replacing

WARNING:
Dangerous

1.

Release

2.

Disconnect

3.

Pull

Battery

clock.

the

battery.

Use

voltages

tie-wraps

battery

the

battery

To

prevent

extreme

are

battery

straight

causes

caution

present

holding

leads.

up

and

all

data

loss,

when

inside

battery

out

trend

operate

removing

the

cabinet

to

chassis.

of

chassis.

information

the

N-6000

or

replacing

in

this

and

custom

on

AC

the

operating

defaults

power

battery

condition.

to

while

with

be

lost

removing

AC

power

and

resets

and

applied.

6.2.3

Removing

1.

Disconnect

2.

Remove

8.

Pull

assembly

4.

Pull

subassembly

5.

Disconnect

6.

Pull

the

Note:

When

replacing

subassembly’s

horizontal

6.2.4

1.

2.

tabs

Removing

Disconnect

Remove
PCB.

Oximetry

ribbon

screw

from

out

cables

of

away

cable

from

subassembly

subassembly,

enclosure.

in

place.

Secure

Main

Processor

all

cable

screws

from

and

CO2

from

right

chassis

slots on

from

front-panel

up

and

Snap

the

the

PCB

connectors

four

corners

Subassembly

Main

Processor

side.

side

panel.

chassis

oximetry

out

of

the

be

sure

vertical

tab

assembly

from

of

Main

side.

chassis

to

place

in

the

with

Main

Processor

PCB.

input

connector.

the

flexible

side

panel

the

screw.

Processor

PCB

first,

PCB.

and

plastic

and

two

insulation

then

snap

screws

from

inside

the

two

center

the

of

3.

6.2.5

1.

2.

3.

4.

6.2.6

Note:

1.

2.

3.

6.2.7

1.

Lift

Main

Processor

Removing

Remove

Pull

Disconnect

Pull

Removing

The

Turn

Remove

Pull tray

Removing

Front-Panel

screws

panel

away

the

panel

away

Pull-Out

front

panel

instrument

screws

away

Speaker

holding

three

Using a 5/16-inch

PCB

from

the

ribbon

and

out

Card

must

be

upside

holding

from

chassis.

nut

up

and

Assembly

the

front

chassis

cable

of

the

Tray

moved

down.

tray

to

driver,

away

panel

about

connectors.

chassis.

away

chassis

remove

from

to

the

an

inch.

from

bottom.

nuts

holding

chassis.

chassis

chassis

at

the top

before

speaker

and

on the

removing

to

rear

bottom.

tray.

panel.

2.

6-2

Pull

speaker

away

from

panel.

6.2.8

Removing

Power

Supply-Charger

PCB

Using a 1/4-inch

1.

Pull

2.

3.

4.

5.

6.2.9

1.

2.

assembly

Disconnect

Remove

Lift

Power

Removing

Using a 5/16-inch
chassis

Pull

transformer

nut

away

cable

connector

screws

bottom.

holding

Supply-Charger

Transformer

nut

and

driver,

from

rear

Power

driver

AC

input

remove

from

PCB

and

nuts

panel

Supply-Charger

and

fuse

holder

up

and

5/16

assembly

holding

clear

out

open

up

of

and

PCB

of

chassis.

end

wrench,

and

AC

input

the

Power

battery

to

chassis

out

of

chassis.

power

leads.

remove

assembly

Supply-Charger

bottom.

nuts

to

holding

rear

panel.

PCB.

transformer

to

6-3

6-1

Diagram

Figure

Disassembly.

N-6000

7.1

DESCRIPTION

This

section

troubleshooting
“Disassembly

describes

Guide,”

and

testing

repair

for

and

are

found

cover

Testing

calibration

in

Section

removal

SECTION

and

Calibration

procedures

8,

“Troubleshooting.”

instructions.

VII

for

the

N-6000.

Also

Instructions

refer

to

Section

for

6,

Table
Freeze

pressing

Note

7.2

7.2.1

The
assumed

7-1

describes

button,

the

that

the

COz2

DISPLAY

Service

N-6000

patient
water
CO2
corrected
numeric
conditions
of % (by
dry
body.

For
temperature
display

These

conditions

vapor,

expressed

to

display

volume)

gas.

Thus,

service

always

conventions,

service

then

pressing

SERVICE

service

CONVENTIONS

Screen

measures

conditions

The

N-6000

on

the

37° C body

in

units

(Body

Temperature,

are

the

front-panel

screen

described,

is

being

refers

displays,

although

screens,

the

soft

key.

screens

and

the

front-panel

displayed

applied

to

may

are

Display

partial

of

37° C

measures

temperature

of

mmHg

however,

to

laboratory

correct

cause

reached

second

To

return

not

available

Conventions

pressure

body

barometric

numeric

and

or

kPa,

Pressure,

on

the

front-panel

numeric

the

the

N-6000.

test

and

confusion.

from

the

and

fourth

to

the

main

until

of

CO2

(PCO2)

temperature

pressure

display

ambient

Saturated,

display

assumption

conditions.

appropriate

the

values

always

No

correction

pressure.

display,

main

soft

keys

monitoring

the

COz

and

are

assumed

are

or

refers

is

for

monitoring

(counting

sensor

in

the

patient

exhaled

directly.

When

also

converted

BTPS)

always

the

before

the

measured

to

to

BTPS

different

screen

the

screen,

has

warmed

airway

breath

By

convention,

to

be

measured

PCO2

is

being

conditions

made

that

is

made.

monitoring

far

left

press

adapter

fully

being

to

fully

displayed.

value

within

dry gas

Thus,

by

pressing

key

the

MENU

up.

saturated

all

from a patient

displayed

saturated

is

expressed

the

at

the

and

the

as

first),

key.

at

normal
with

readings

on

breath

When

as

patient's

room

service

test

and

of

and

the

units

%

screen

For

example,

saturated
front-panel
by

barometric
approximately
gas
will
the

On

the
adapter
mmHg
mmHg

gas

display

is

being

read

be

approximately

service

screen

other

at

the

(5%

times

and

kPa,

if a patient

with a true

will

pressure

1% lower

at

conditions

8%

assumes

hand,

same

760),

and

if

dry

barometric

8%

at

sea

deep

read

minus

values

lower

dry

gas

and

5.1

higher

level

(barometric

lung

end-tidal

38

mmHg,

water vapor

for

mmHg

of

room

because

gas

input.

with

5.0%

pressure

kPa.

The

in % for

pressure

PCO2

5.1

kPa,

and

partial

and

kPa

temperature

the

gas

source

CO2

from a tank

of

760

mmHg,

front-panel

the

same

equal

of

38

mmHg

5.3 % (%
pressure).
due

to

the

and

is

dry.

(the

patient)

is

being

the

service

display

reasons.

to

760

into

the

equals

The

service

service

The

is

applied

screen

will

read

mmHg)

patient

the

screen

service

actually

to

approximately

airway

pressure

screen

assumption

screen

fully

the

patient

displays

is

exhaling

of

CO2

will

reading
saturated

will

fully

adapter,

divided

read

that

in

airway

be

5.0%,

1%

higher

the

the

%

but

38

in

Although
patient
values
monitoring a patient,

front-panel

722

The
from

spontaneous
of

ETCO2,

The

obtainable
simply

value

ETCO2.

patient.

the

monitoring

are

Breath

N-6000

maximum

the

value

of

average

of

ETCO2

The

above

used

for

numeric

Detection

detects

and

breaths

N-6000

ETCO2

from

the

all

seen

result

and

breaths

is a stable

conventions

laboratory

patient

and

minimum

with

that best

patient

within

monitoring,
ignore
display.

detects

and

counts

low

together

the

Display

during

the

and

estimates

ETCO2

may

seem

testing. A good

and

service

breaths

values

ETCO2

counts

last 8 seconds

screen.

of

End-Tidal

when

of

values

all

the

forced

to

display

value

confusing,

rule

the

service

When

CO2

the

GO2

CO2.

When a patient

followed

breaths

true

alveolar

exhalation.

the

ETCO2

and

displays

that

best

they

allow

of

thumb

screen

testing

Values

level

by a mechanical

accurately.

CO2

Unlike

value,

approximates

is

is

dry

crosses a threshold

on a ventilator

value

conventional

the

that

maximum

accurate

that

the

used

for

gas

in a test

breath

is

the

N-6000

the

arterial

|

readings

front-panel

bench

maximum

testing.

setup,

set

dynamically

has

several

with a higher

capnometers

looks

for

value

for

PaCO2

during

display

When

ignore

value

that

the

maximum

the

true

value

.

both

the

value

in

the

Software
SERVICE

BOOT

EEPROM

C02

DISPLAY

SPO2

ROM

BOARD

BOARD

Parameter

Version

soft

BOARD

Screen

key)

ROM

ROM

ROM

Table

(press

7-1:

Service

Screen

Function

FLASH

bootstrap

FLASH
version:

operating

COz
EPROM

LED

controller
microcontroller
software

SpO2
EPROM

memory

loader

software

Main

software

subsystem

version

display/keyboard

version

subsystem

version

Indications

version

product

software

software

Normal

Range

and

Tolerance

CO

BOARD

Service

STATUS

Screens

(press

CO2

soft

CO2

key)

board

status

0300

with

normal

sensor

operation.

connected

and

Table

7-1:

Service

(continued)

Screen

Indications

RAW

BENCH

BARO.

C02

IN

RATIO

TEMP

PRESSURE

(operator-selected

IN

MMHG

units)

Calculated
peaks
amount

Sensor

Current

pressure

Uncompensated

CO2

units

ratio

used

to

of

CO2

temperature

barometric

in

current

of

bench.

determine

present.

detected

display

Varies

0.5
characteristics and

This

42.0°
the
the
error
temperature
Otherwise,
39° C after 7 minutes

precaution.

Displays
pressure
correcting
for

Displays

selected

This

Body
Saturated

temperature

screen
from
the

sensor

to

0.9.

is

microprocessor-regulated

C.

bench

monitor

is

generated

calibration.

value

Temperature,

reading

the

monitor.

to

sensor;

Depends

This

is

up
detects a breath.

the

current

in

mmHg

percentage

CO2

units

is

and

ETCO2

on

should

to

temperature

once

exceeds

temperature

barometric

that

value

(mmHg,

not

compensated

assumes

is

25"

C,

may

value

typically

bench

reading.

not

vary

An

the

bench

46.0°

C.

drops

as a safety

is

used

readings

in

operator-

kPa,

or

Pressure,

that

the

The

service

be

different

displayed

to

once

and

to

for

and

%).

for

by

Press

CO2

VALUES

HIGH

PEAK

DETECTOR

HEATER

MOTOR

and

SPEED

then

MORE

CO2

Bench

A

bias

Heater

Bench

signal

voltage

voltage

motor

speed

One

of

two

Typically

and

will

Will

vary

„used

to

compensate

gains.

This

heater

with
ambient

This

bench
typically

typical

is

the
in

room

is

the

motor

bench

3.5 V with

vary

sensor

voltage applied

the

temperature;

it

is

period

30.0

waveform

no

with

temperature.

to

sensor and

for

readings

sensor

typically 2 V.

in

head.

of

rotation

milliseconds.

ms;

+5:

peaks.

CO2

present,

is
sensor
are 1 to 2 V.

to

the

It

varies

at

25°

C

of

the

It

ms.

is

7-3

Table

7-1:

Service

(continued)

Sereen

Indications

BIAS

LOW

SOURCE

HEAT

MOTOR

Press

CO2

VALUES

SENSOR

PEAK

CONT.

POT

REV.

and

then

SENSOR

Bias

control

Bench

IR

Heater

Setting
potentiometer
control

Indicates
of
format

Signal

source

control

of

sensor

voltage

electronic

revision

EEPROM

number

term

for

motor

level

data

Used

to

set

the

desired

voltage.

One

of

two

bench

voltages.
varies
present

The

this
source
voltage-regulated. A typical
reading

Used
and

temperature.

Setting
definitive

Used
data

It

is

typically 2 V

with

the

amount

and

with

voltage

will

in

varies

to

in

applied

vary

slightly

is

current-regulated,

is

2.5

V.

regulating

based

will

vary

typical

determine

the

Sensor

detector

waveform

and

of

CO2

temperature.

to

the

source;

because

the

temperature

on

ambient

0-255;

there

setting.

how

to

interpret

Memory

bias

peak

-

the

not

is

no

screen.

SENSOR

SERIAL

LAST

Press

DISPLAY

SEGMENT

DISPLAY

NUMBER

CAL

TIME

DATE

FAIL

CURRENT

DATA

Sensor

Sensor

Last

Indicates

Relative
LED

run

serial

calibration

displays

time

number

failed

current

date

LED

draw

Indicates

run

Electronic

Used

sensor

Should

non-zero

LED

Figure

the

Used

of

draw
Number
currently

total

time;

units

sensor

as

an

indication

calibration.

normally

number

digit.

7-1

shows

failed

LED

to

indicate

for

each

varies

on

accumulated

are

in

hours.

serial

be

indicates a failed

how

all

to

of

zeros;

number.

last

~

determine

digit.

relative

LED

with

the

display.

current

display

what’s

sensor

date

any

digit.

of

Press

SPO2

Table

7-1:

Service

(continued)

Screen

Indications

CALIB.

INAMP

RED

IR

LED

Press

BOARD

SERIAL

HOURS

LED

MORE

INDEX

GAIN

DRIVE

DRIVE

NUMBER

IN

OPERATION

and

then

MAIN

Sensor
Index

Input

Red

Infrared

N-6000

Amplifier

LED

N-6000

Calibration

Gain

Drive

LED

Drive

serial

run

number

time

Shows

resistor

Shows
input

Relative
applied

the

in

current

amplifier.

amount

to

255.

Relative
applied
is 0 to

Electronic

N-6000;

EEPROM

processor

Indicates
the

amount

to

255

this

main

value
the

SpO2

setting

the

red

the

infrared

serial

number

on

the

circuit

total

hours

board.

of

the

sensor.

of

Range

of

power

LED.

of

power

number

is

original

board.

in

calibration

the

SpO2

is 0 to

Range

LED.

stored

255.

being

is 0

being

Range

of

the

in

main

operation

an

to

of

Press

POWER

DC

BATTERY

AC

MAINS

SUPPLY

VOLTAGE

Unregulated
voltage

Battery

Shows

voltage

power

DC

supply

source

When
indicates
supplied
regulators.

Indicates

rechargeable
charged
over
about
power

Shows

running

unregulated

to

present

battery

13

V;

the

10 V.

is

off.

either

the

on

AC

mains,

voltage

various

battery. A freshly-

indicates a little

system

Present

ON

system

voltage

shuts

only

or

OFF.

of

down

when

°

at

AC

0000000000000000000000

tin

in

gl

it

iti

5 6 7 8 9

7.

Middle

8.

Right

9.

Left

10.

Right

11.

Alarm

1.

2.

3.

4.

5.

6.

Left

1

2

SpOz,
Middle
Right
Left

COz,
Right
Left

SpOz,

8 4

SpOa,

SpOz,

red

COa,

red

red

red

red

green

it

CO,

ia

it

10

1

SpOz,

SpOz,

green

CO2,

green

silence

green

green

Service

Pairs

|

Failed

display

digits

screen

7.3

CALIBRATION

Check

VIII,

resolving

To

1.

2.

the

mainstream

“Troubleshooting,”

them.

check

the

Ina

well-ventilated

plug

the

Turn

the

monitoring

the

MENU
DSABLE
Note:

The

8.

Let

the

4. . Usingthe
MENU
Press

the

back

to

AND

CO2

mainstream

sensor

mainstream

button,

the

into the

monitor

screen

button,

ALL

function

DISABLE

MENU

the

CO2

UNITS

monitoring

ACCURACY

sensor

discusses

sensor,

room,

N-6000.

ON

and

is

displayed.

the

ALARMS

key.

key

CO2

button,

SYSTEM

function

screen.

Figure

Non-zero

of

the

potential

follow

connect

let

the

Use

Press

may

not

sensor

run

change

function

key

7-1:

numbers

CHECK

N-6000

difficulties,

these

the

mainstream

device

function

the

warm

the

MENU

the

MENU

be

available,

in

this

units

key,

until

the

Failed

indicate

at

least

steps:

up

key,

the

to

depending

condition

of

measurement

then

selector

LED

Digits

failure.

once a year

their

possible

CO2

sensor

(approximately

button

to

disable

DISABLE

return

to

the
upon

for 15

minutes.

of

the

SYSTEM
is

on

“%",

to

ensure

causes,

to

an

45

seconds)

all

function

monitoring

custom

CO2

to

“%

VARIABLES

then

press

its

accuracy.

and

airway

audible
key,

followed
screen.

default

CO2":

function

MENU

suggestions

adapter

until

the

alarms:

by

settings.

press

the

key.

button

Section

for

and

press

the

to

get

5.

6.

7-6

To

view

fourth

SERVICE

Wait

15

air.

Check

adapter

CO2

values,

soft

keys

simultaneously;

SCREEN

minutes,

the

sensor

or

simulate a few

enter

should

then

observe

temperature;

the

service

(2)

now

be

thereading

breaths

screen:

press

SERVICE;

displayed.

of

it

should

to

deactivate

(1)

CO2

be

press

IN

+42

the

FREEZE,

(3)

press

%.

CO2

+0.25°

sensor

then

CO2

should

C.

Breathe

cool-down

press

The

be

at

through

safety

CO2

0%

the

second

BOARD

ーー

to

0.3%

the

airway

feature.

and

with

room

Introduce a 10%

NELLCOR

N-6000.

Note:

The

GSTK-6000

COz

temperature.

displayed.

In

room

air,

the

must

be

5.0

+0.3%.

the

reading

Tf

desired,

key.

If

Services

should

this

the

mainstream

Department

quantity

values

The

ETCO2

screen

displayed

ETCO2

With

be

10.0

can

for

of

CO2

of a known

calibration

on

value

is

compensated.

reading

10%

must

CO2

+0.4%.

be

printed

CO2

sensor

assistance.

gas

kit)

into

the

service

be

0.0%

introduced

by

pushing

is

not

within

concentration

the

airway

screen

to

under

The

0.3%.

the

are

user

With

the

same

FREEZE

not

must

specifications,

(preferably

adapter.

Note

compensated

identify

」

5%

CO2

introduced,

barometric

button,

call

then

the

from

the

for

the

proper

pressure

the

Nelleor

a

reading

water

the

PRINT

Technical

on

the

vapor

or

value

reading

conditions,

SCRN

There

1.

are

The
levels

The

label
additional
then

To

.

ㆍ

Note:
system
continuously,

The

seen a breath

should

three

factors

first

factor

(room

air

second

says

factor

5.0%
mainstream

the

gas

source's

avoid

these

Use

calibration
gravimetrics
Make

concentration.

sure

Gas-sampling

provides

third

factor

rise

to

that

occur

is

conducting

is

not

0%

is

use

of a source

but

contains

CO2

accuracy

difficulties,

gas

method.

all

connections

test

calibrated

at a low

is

by

42°

nominal

that

the

breathing

C.

Repeat

during

CO2.).

the

test

The

this

test

of

4.6%).

One

sensors.

is

suspect

the

following

from a known

are

secure.

kit

GSTK-6000

gases

CO2

through

for

flow

rate

sensor

the

tests.

test

that

in a room

room

CO2

that

way

to

If

they

all

and

another

precautions

source,

Leaks

is

available

use

in

verifying

of

35

is

not

operating

airway

can

result

containing

must

be

well-ventilated.

does

not

match

check

this

is

are

consistently

gas

source

must

be

preferably

of

NBS

room

from

calibration.

cc/minute.

at

42°

adapter a few

in

unfavorable

significant

its

label

to

sample

the

high

should

observed:

traceable

air

will

decrease

Nellcor.

This

Gases

C.

Ensure

times.

The

situations:

background

(example:

canister

or

consistently

be

tried.

and

assayed

measured

gas-sampling

are

sampled

that

the

sensor

sensor’s

CO2

gas

canister

with

low,

by

a

CO2

has

temperature

8.1

INTRODUCTION

This

section

them.

interference,

There

and

those

second

If

the

following

Section

can

7,

are

that

be

“Test

describes

two

kinds

cause

erratic

caused

such

as

table

does

and

Calibration,”

potential

of

malfunctions:

behavior.

by

external

that

from

not

Troubleshooting

trouble

The

factors

an

electrosurgical

describe

the

for

additional

SECTION

symptoms,

those

first

kind

such

as

problem,

VIII

probable

that

cause

the

is a result

improper

unit.

refer

indications.

sensor

to

the

causes,

instrument

of

internal

use

service

and

suggestions

component

or

external

screens

not

to

operate

electrical

description

for

resolving

at

all,

failures;

in

the

Symptom

Instrument

Instrument
the

battery.

SpO2

pulse

tracking

the

cannot

operates

amplitude

pulse:

be

no

turned

on

AC

power

indicator

values

Table

on,

but

is

not

are

displayed,

8-1:

Troubleshooting

not

on

*

9

Connect
front-panel
on.
persists,
not
Technical

*

The

*

The

.

The

Check

*

Guide

Probable

to

If

the

indicator

check

resolve

battery

of

12

hours

the

battery.

battery

battery
defective.
Services

the

Sensor
plugged

Department.

sensor

or

in.

Cause

AC

power

battery

the

the

problem,

Services

may

is

required

fuse

may

or

the

Contact

and

sensor

sensor

extension

Check

and

verify

that

charging

is

off

AC

fuse(s).

Department.

be

discharged. A minimum

to

be

battery

Nellcor’s

them.

indicator

and

the

problem

If

this

contact

completely

open.

charger

extension

Nellcor's

Check

Technical

cable

may

cable:

may

the

is

does

recharge

it.

be

not

be

9

The

sensor

damaged.

or

extension

Replace

them.

cable

may

be

SpO2

pulse

amplitude

tracking

the

(continued).

SpO2

pulse

amplitude
tracking
saturation

the

and

pulse:

pulse:

pulse

indicator

no

values

indicator

zero

display

rate.

Table

is

not

are

displayed

is

not

for

8-1:

oxygen

Troubleshooting

(continued)

Check

+

SpO2

'

Connect a NELLCOR
the

Sp02
should
should

9

Connect a NELLCOR
sensor
optical
other.

.

Connect
on

the
pulses
If

they

defective;

.

The

sensor

.

patient.

*

The

patient’s

instrument

Check
C-LOCK

instrument

try

another

OXISENSOR

Guide

module

sensor

be

40+1

be

81+1,

input

connector.

sensor

LED

intensity

an

oscilloscope

Main

Processor

should

do

not,

replace

máy

Check

perfusion

to

the

condition

ECG

on
sensor

operation:

PT-2500

input

connector.

and

the

saturation

sensor

to

Move

away

from

and

appear

the

oximetry

it.

be

improperly

should

on

change.

probe

to

PCB.

5V

the

oscilloscope

module

application.

may

be

detect

an

acceptable

of

the

patient;

synchronization;

yourself

R-15.

or

site; or

on

try

another
the

pocket

tester

Pulse

reading

the

SpO2

the

LEDs

toward

pin 1 of

logic-level

is

probably

applied

too

poor

pulse.

use

test

the

to

rate

and

each

U229

trace.

to

the

for

the

patient;

8-2

9

Check

SpO2

module

operation

as

listed

above.

Pulse
there

amplitude

is

no

oxygen

indicator

saturation

Table

8-1:

tracks a pulse,

or

pulse

rate.

Troubleshooting

(continued)

but

©

The

allow

and
the
patient;
test

OXISENSOR

Guide

patient's

the

instrument

pulse

rate

pulse

bar).

use

the

instrument

perfusion

(fewer

Check

C-LOCK

on

R-15.

may

to

measure

than

two

the

condition

ECG

someone

be

too

low

to

saturation

to

three

bars

on

of

the

synchronization;

else;

or

try

the

SpO2

and/or

pulse

rapidly; pulse

Displayed
that

of

ECG

pulse

monitor.

rate

amplitude

rate

does

display

indicator

not

correlate

changes

erratic.

with

*

+

Excessive
impossible

pattern.

check

properly

use

sensor

tolerates

If

whether

applied,

C-LOCK

to a new

more

averaging

Excessive

impossible

pattern.

check

properly

use
sensor

tolerates

If

whether

applied,

C-LOCK

to a new

more

averaging

Excessive
impossible
pattern.

check
properly
use

sensor

tolerates

If

whether

applied,

C-LOCK

to a new

more

averaging

patient

for

motion

the

instrument

possible,

the

and replace

ECG

site;

motion;

mode

to

patient

for

motion

the

instrument

possible,

the

and

ECG

site;

motion;

mode

to

patient

for

motion

the

instrument

possible,

the

and

ECG

site;

motion;

mode

to

may

be

making

to

find

keep

the

patient

sensor

is

securely

it if

necessary;

synchronization;

use a sensor

or

set

10-15

keep

sensor

seconds

may

the

is

replace

synchronization;

use a sensor

or

set

10-15

seconds

may

keep

the

sensor

is

replace

that

the

SpO2

(Mode

be

making

to

find
patient
securely

it

if

necessary;

that

the

SpO2

(Mode

be

making

to

find
patient
securely

it

if

necessary;

synchronization;

use a sensor

or

set

10~15

seconds

the

that

SpOz

(Mode

the

pulse

still;

and

move

3).

the

pulse

still;

and

move

3)

the

pulse

still;

and

move

3).

it

the

it

the

it

the

The

patient

notch,

which
measurement
site.

If

C-LOCK
artifact
on

improve
manual

the

or

poor

ECG

quality

for

may

have a pronounced

causes

ECG

monitor.

that

the

to

double.

synchronization

quality

signal

Adjust

of

ECG

monitor.

pulse

rate

Try

another

ECG

signal.

may

Refer

dicrotic

sensor

is

in

use,

be

present

leads

to

an

to

the

8-3

SpO2

measurement

the

value

calculated

determination.

does

not

correlate

from a blood

Table

gas

8-1:

Troubleshooting

(continued)

with

.

Guide

The

calculation
adjusted
relevant

for

PaCO2,
hemoglobin.
have

been

relevant

variables.
saturation
CO-Oximeter

may

not

the effects

of

2,3-DPG,

Check

whether

appropriately

In

general,

values

are

not

measurements.

have

been

pH,

temperature-

or

fetal

calculations

corrected

calculated

as

reliable

correctly

-

for

as

direct

SpOz

does

Oximeter.

not

correlate

with

laboratory

CO-.

Accuracy
application
dysfunctional
dyes,
movement,
electrosurgical
of a sensor
pressure
intravascular
warnings,
operator’s
directions

Fractional

+

converted

the

comparison

well

functional

oximeters,
Laboratory
multi-wavelength

fractional

measurements
functional
The

equation
found
Section
requires
oximeter
simultaneously

supply.

can

be

or

use,

hemoglobins,

bright

light,

venous

interference,

on an

cuff,

arterial

line.

and

cautions

manual,

for

use.

measurements

to

functional

was

as

two-wavelength

saturation.

such

282

CO-Oximeter

saturation.

must

measurements

used

in

the

“Principles

II

of

this

that

the

measurement

affected

significant

excessive

pulsations,

extremity

catheter,

Observe

in

and

in

measurements

made.

Multi-wavelength

as

the

Instrumentation

oximeters,

Fractional

be

converted

to

make

manual.

blood

sampling

be

from

the

by

incorrect

levels

intravascular

patient

and

placement

that

has a blood
or

all

instructions,

this

manual,

the

SpO2

may

not

The N-6000,

oximeters,

and

measure

to

for

comparison.

this

conversion

of

Operation”

Close

correlation

and

obtained

same

arterial

sensor

of

the

sensor

have

been

before

as

measure

Corning

in

pulse

is

8-4

Table

8-1:

Troubleshooting

(continued)

Guide

ETCO?2

value

obtained

ETCO2

waveform

does

from

display

or

value.

not

blood

window

match

gas

is

pC02

sample.

not

showing a C02

values

Ventilation/perfusion

clinically
physiologic

Check

circuit

N20

for

at

may

present;

situation.

leaks

in

the

airway

be

present;

consider

the

mode.

Elevated

compensation

The
the

Sensor

the

Monitor

the

N-6000

patient

levels

N-6000

display

may

system

for

be

GSTK-6000.

may

be

CO2/SpO2

may

not

airway;

of

O2

mode.

status

out

of

in

the

monitoring

be

connected

verify

connections,

mismatching

patient’s

patient

adapter.

use

N20

may

be

may

have

messages.

calibration;

SpO2

mode;

mode.

secure

may

ventilation

compensation

in

use;

use

an

error;

verify

change

correctly

and

proper

O2

check

with

to

the

be

to

CO2

module

check

the

Water
may

occlude

replace

may

have

display

for

condensation

sapphire

ADAP-UC,

an

status

or

patient

windows;

as

required.

internal

messages.

secretions

clean

error;

or

82

ADVISORY

MESSAGES

Advisory
messages
the

message

AIRWAY

+.

CO2/Sp02

¢.

COz

+.

PULSE

*

messages

are

no

are

displayed

longer

displayed

on

exists.

ADAPTER

The

message

airway

indicates

adapter.

Other

electromechanical

SENSOR

If

the

sensor
physiological
sounds.

To

SENSOR

The

CO2

sensor

requires a short

SENSOR

WARMING

NOT

is

removed,

signal

clear

WARMING

may

time

SEARCH

Indicates

is

initially

displayed
lost,
ALARM

that

the

connected

without a tone.

an

alarming

SILENCE

by

the

display

OCCLUDED

that

causes

faults.

CONNECTED

has

this

alarm,

UP

be

at a temperature

period

UP

SpO2

sensor

to

the

pulse

search

button

the

the

the

system

screén

CO2

include

SENSOR

to

provide

and

will

bench

obstructions

NOT

been detected and

press

the

ALARM

that

to

warm

up

to

message

monitor

If a valid

is

displayed

is

connected

and

physiological

condition

not

is

twice.

information

disappear

signal

is

CONNECTED

the

sensor

SILENCE

is

below

the

desired

during

but

no

to

the

pulse

activated.

to

the

when

the

reduced
on

the

due

to

sapphire

message

is

removed,

button

the

specified

operating

pulse

this

is

temperature.

time

being

detected.

patient, a pulse

is

detected

To

clear

this

operator.

underlying

an

obstruction

windows

is

displayed.

an

audio

twice.

operating

period.

search

and

then

alarm,

Advisory

reason

or

for

of

the

internal

If

a

alarm

range

and

The

CO2

When a sensor

message

the

press

is

pulse

the

is

8-6

TREND

.

This

have
contact

any function

CUSTOM

.

This
factory
continue.

‘

representative

DATA

message

occurred

Nellcor’s

DEFAULTS

message

default

LOST,

is

if

key

is

settings

Contact

for

ERROR

displayed

the

battery was
Technical
to

clear

LOST,

displayed

ERROR

will

Nellcor's

further

125

at

power-up

disconnected.

Services

the

message

126

at

power-up

be

used.

Technical

information.

if

stored

If

Department

and

continue.

if

the

custom

Press any

Services

trend

data

the

battery

or

Nellcor’s

default

function

key

Department

have been

has

not

lost.

been

representative.

settings

to

or

have been

clear

the

Nellcor's

This

may

replaced,

Press

lost;

message

the

and

8.3

STATUS

A

status
identified
troubleshooting
the

case

8.3.1

Main

MESSAGES

message

by a module

of a defective

System

is

the

Errors

problem.

displayed

identifier

Most

submodule,

when

and

the

an

an

error

submodule

error

condition

error

code

messages

number

can

will

occurs.

be

be

An

that

cleared

automatically

error

will

by

pressing

condition

assist

service

disabled.

any

will

be

personnel

function

in

key.

In

Exror

”

“104

122
125
126

8.3.2

Error

8.3.3

Error

Code

101
102
103

CO2

Code

201
202
205
206
210

C02

Code

Subsystem

CO2

C02
CO2
CO2

C02/host

Sensor

Errors

Meaning

Meaning

RAM
ROM

Noritake

TREND

LED

segment

EEPROM

Custom

Errors

nin

RAM
ROM

analog
general

error
error

out

RAM

error

error

data

error

defaults

error
error

error

communications

error

hardware

failure

error

R

Turn

ON/STANDBY
20
message
personnel
For
function

R

The

automatically
operational.

then

personnel

regarding

R

nded

the

N-6000

seconds,

error

then

persists,

or

conditions

key

nded

capnography

retry.

Contact

or

the

ded

C

off

by

button.

turn

contact

Nelicor’s

125

to

continue.

C

subsystem

halted and

Cycle

mains

qualified

Nelicor’s

capnography

C

ive

Acti

pressing

Wait

it

back

representative.

and

ive

is

power

representative

ive

the

at

least

on.

If

the

qualified

126,

press

Acti

is

not

on

service

subsystem.

Acti

service

any

and

off,

250
252
260
261

262

CO2

Sensor

CO2

Sensor

COz

Sensor

CO2

Sensor

This

message

monitoring

drops

below

more.

COz

Sensor

‘This

message
monitoring
rises

above
more.

General

EEPROM

Temperature

Temperature

if

36°

Temperature

if

46” C for

Failure.

appears

sensor

C for

appears

sensor

30

Error.

Failure.

Too

Low.

while

temperature

30

seconds

Too

High.

while

temperature

seconds

The

operational

CO2
CO2
the

airway

heat

or

an

external
service
representative
repaired.

Retry

or

error

Technical

capnography

because

sensor.

sensor.

or

sensor

continues

Disconnect,

Try

adapter.

cold

being

source.

personnel

to

(see

Services

subsystem

of a problem

another

Check

applied

Contact

or

Nellcor's

have

the

procedure

to

persist,

Department.

is

then

CO2

for

to

the

qualified

CO2

above).

contact

not

with

the
reconnect
sensor.

excessive

sensor

Clean

sensor

If

the

Nellcor’s

the

from

8-7

8.3.3

CO2

Sensor

Errors

(continued)

Error

270

280

290

8.3.4

SpO2

Error

301
302
310

Code © Meaning

C02

Sensor

Range.

This

message
sensor
too

fast

C02

Sensor

Mismatch.

This

message

sensor

EEPROM
Nellcor
indication

sensor’s

Subsystem

Code

Sensor

‘Meaning

SpO2
SpO2
Sp02/host

low

Errors

RAM

ROM

Motor

Speed

appears

chopper

or

too

motor

slow.

Manufacturer

appears

ID

stored

does

ID.

It

in

not

also

match

may

of a fault

EEPROM.

signal

fault.

error
error

communications

Out

when

is

running

ID

when

the

monitor’s

be

in

the

of

the

the

the

an

error

Recommended

The

capnography
operational
CO2

sensor.

CO2

sensor.

the

airway

is

illuminated.

an

obstruction.
personnel
have

Retry

error

Technical

R

The

Contact

Nellcor's

oximetry

or

the

CO2

sensor

continues

nd

oximetry

qualified

representative

subsystem.

Corrective

subsystem

because

Disconnect,
Try

adapter.

Nellcor's

(see

Services

of a problem

another

Check

Check

Contact

sensor

procedure

to

persist,

AC

subsystem

service

Action

is

not

then

reconnect

CO2

sensor.

that

the

the

optical

qualified

representative

repaired.

above).

contact

Department.

내

A

*

is

not

operational.

personnel

regarding

with

the

Clean

IR

source

path

for

service

to

If

the

Nellcor’s

-

or

the

the

8-8

9.1

INTRODUCTION

This

section

lists

N-6000

spare

parts,

SECTION

Spare

both

Parts

electrical

IX

and

mechanical.

Description

Main

Processor
Power
Display

CO2

Oximetry

Display...............

Battery.......................

Transformer

Bezel.
Speaker

Bezel
Upper
Lower

Chassis.................

Pull-OutCardTray........................

Supply-Charger

Controller

Module

Assembly......

Assembly

Keypad..............................

Bracket.......

RearPanellugwithhardware..........................

Rubber

Cover/Handle

Handle

Handle

Power

Sensor
Harness
Ribbon
Ribbon
Ribbon
Ribbon

RibbonCable,34-Conductor.........................................

A
Display
Fuse

Filter........................

Filter

TiltStandFoot..............................

Mounting

..............

Entry

Door..............

Cable,
Cable,
Cable,
Cable,

Shield....

holder.

Bezel

PCB.......................,,,...,,.,,.,,.,,

PCB

Lei

PGB.................................

..............

Module...

Assembly

.

N

...

... ...

..

Bracket.

Foot

Module..

Assembly......

IN

Assembly

Holder.........

Assembly..

Clips...

10-Conductor...

14-Conductor...............

26-Conductor,
26-Conductor,

ea

5-1/2

1-3/4

ーー

inch..
inch..

een

トー

Le

トト

erene

トト

eee

トー

44e

nk

トー

eee

ドー

ドー

トー

トト し し て いい

...

P O K Pe K R K Ren

トト

トット

oenesssse

ーー

...

て て

て

いて

て

Nellcor

ον

o
...

tee
...

て

...
…
...

...

...
ーー

...

ων

ας

て

Part

026414
026413
026419

026418

MP-203

026420
026417
026416
026415
026421
024612
024613
024614
024615
024616

024617

025409

024620

024622
024623
026422
024646
024630
024635
024636
024637
024638

024639
024640

,

024642
024626
024676
024677

025398

Number

9-1

10.1

This

OVERVIEW

section

contains

PCB

drawings,

SECTION

Component

showing

component

X

Location

location.

Drawing

Oximetry
CO2

Module

Main

Processor

Power

Supply-Charger

Module

Component

Component

PCB

Component

Location

Location

PCBComponentlocation.................................

...............

...........

Location..........

e

eee

Page

10-3

…

10-5

...

10-9

10-7

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