Aequitron 9500, 9550 User manual

Model

9500/9550

Respiration/Heart

Technical

a

Manual

Rate

Monitor

00-004258-000

AEQUITRON

AS

€

MEDICAL

MINNEAPOLIS,

MINNESOTA

INC

55447

U.S.A.

©Copyright
Minnesota
reproduced,

Medical,

Inc.

1991,

55447

or

stored

Aequitron

U.S.A.

All

in

any

Medical?

rights

reserved.

form

without

Inc.,

the

14800

No

portion

express

28th

of

written

Avenue

this

manual

permission

North,

Minneapolis,

may

be

copied,

of

Aequitron

-

page

For

ti

more

Aequitron

information:

Contact
equipment
4979;

Medical

your

(612)

is a registered

Aequitron

and

related

557-9200.

trademark

representative

services.

Fax:

(612)

Or,

557-8200.

for

contact

of

Aequitron

information

Aequitron

Medical,

on

our

full

directly.

inc.

line

Phone:

of
(800}

July

medical

497-

1993

Contents

Chapter

Title

Introduction
Description

FrontPanel.........

Back

Panel

Accessories

Theory

Power
Isolated

Analog

Digital
9500/9550
9500/9550
ECG
Respiratory
Oximeter
Microprocessor
LEDs

Inspection

Egulpment.....

IMmspection

Infant

Adult

ECG
Inverted

Heart

Lead
Respiration

Oxygen
Interface

System

Channel

and

Alarm

Alarm

Response

Rate = Resp. 이 이이 이 이

Output

Generating a 9500/9550

Summary

Charging

Ground
Checksheet

.......

.........

of

Operation

Section

System

System

Desat し し

o...
System
Power

Block

Channel/Lead

Block

Alarm

6.00.

Procedure

Settings..

Settings...

Polarity

Response

Test.

Report

Light

Wire

Resistance

.........

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

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

Block

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Page

1-1

2-1

2-2

2-3
2-4

3-1

3-2
3-3
3-4
3-6
8-9
3-10
3-11
8-12
3-13
3-14
8-15

4-1

4-2
4-3

4-6
4-7

4-9
4-10

4-11

4-11
4-12

4-13

4-13

4-14

4-15

4-19

4-19

:

July

1991

Disassembly

5-1

Contents

Model

9500/9550:

Technical

6

Schematics

Final

Assembly

Digital

Analog

Analog
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Front
BackPanad
Back
Phone
Key

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Board

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Jack

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6-2

6-5

6-9

6-12
6-15
6-16
6-18
6-20
6-23
6-25

page

iv

July

1991

Introduction

This

manual

Aequitron

tion/Heart

competent
product
and
Manuals.

by

application

presents

Medical

Rate

monitors.

biomedical

Aequitron

of

the

technical

Models

technicians

Medical“

monitors,

9500,

This

Inc.

see

and

9550,

manual

who

For

information

the

Dealer's,

service

and

is

intended

have

been

information

9550/50

for

trained

on

the

operation

User's,

and

about

Respira-

use

by

on

this

Reports

Aequitron

accurate,
sentations.

Medical

but

AEQUITRON
TIES,

EXPRESSED
INCLUDING
FITNESS

It

is
maintained
before

Refer
manual

FOR A PARTICULAR

the

user’s

it

is

any

adjustments

to

an

believes

accepts

MEDICAL

OR

ANY

and

put

Aequitron

WARRANTIES

responsibility

that

into

use.

the

no

liability

FURTHER

IMPLIED,

to

it

is

in

safe

or

procedures

Technical

(800)

information

for

errors,

DECLINES

FOR

THE

OF

MERCHANTABILITY

PURPOSE.

ensure

497-3787

that

and

proper

that

Service

Representative

herein

omissions,

is

ANY

REPAIRED

the

product

operating

exceed

the

complete

or

misrepre-

WARRAN-

PRODUCT,

is

properly

condition

scope

of

by

calling:

and

OR

this

July

1993

Page

1-1

Chapters

Chapters

Following
Use

this

is a list

list

to

of

this

guide

manual's

you

to

the

Model

chapters,

area

of

9500/9550:

with a summary

interest.

Technical

Manual

ofeach.

Theory

of

Operation

Inspection

Disassembly

Schematics

Conventions

a

detailed

chapter

A

procedure

the
monitor,

A

pictorial

sembly

module

Electrical

ings

Notes,
technical

describes

monitor.

and

of a monitor.

level

schematics,

for

the

Cautions,

manual:

review

to

Use

as

of

the

test

this

part

the

monitor

and

procedure

of

verify

periodic

operation

representation,

Disassembly

supported

by

component

major

sub-assemblies

and

Warnings

down

the

operation

before

inspections

with

accompanying

Aequitron

mean

of

the

monitor's

to

the

functional-block

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and

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shown

Medical.

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of

the

monitors.

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text,

to

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level.

functions

any

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monitors.

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replaceable

throughout

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of

to

a

disas-

draw-

this

Page

1-2

Note

Warning

Directions

Directions

that

that

make

prevent

JÍ

Directions

giver,

or

that

to

warn

service

it

easier

damaging

of

hazards

personnel.

to

use

or

service

the

equipment.

to

the

the

monitor.

a

patient,

to a care-

duly

1991

Description

The

light
one

for

each

The

monitor

on

alarm

monitor

sounds a warning

the

front

panel

can

occur

alarm.

sounds

to

at

the

alarms

alarm

indicate

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when

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time.

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on

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turns

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Your

monitor

breathing

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The

front

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RESET

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POWER

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e

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pause

rate

is a warning

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but

panel

for

button

switch

lights

speaker

in

the

that

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rate.

YOU

has:

human

cable

patient's

is

too fast

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must

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breathing

or

system.
sounds

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the

equipment

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alarm

necessary

effort

effort

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and

alarms

and

prevent

indicates

action.

heart

problems

beat

where

with

the

July

1993

The

back

panel

+

Battery

+

Green

«

Otherjacks

has:

charger

charger

and

jack

light

controls

for

your

doctor

or

homecare

dealer

Page

2-1

Front

Panel

Model

9500/9550:

Technical

Manual

Front

Human

Human
tects a pause
or a heart

During a human
ared

occurred.

©

Equipment

Equipment
occurs
the
most
constantly. A yellow
which

©

Reset

Use

LEAD
over.

the

Panel

Alarm

alarms

light

with

patient,

equipment

alarm

this

alarm

Also,

POWER

rate

button

switch

sound

in

the

that

turns

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alarms
the

battery,

or

with

occurred.

lights

hold

this

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when

patient's

is

too

alarm

on

to

show

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sound

the

monitor

alarms

light

to

turn

after

an

button

to

turn

©

the

monitor

breathing

fast

or

too

the

alarm
you

which

when a problem

with a connection

itself.

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alarm

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sounds

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off.

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button

you

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the

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monitor

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alarm

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and

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green

green

light

detects

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light

detects a heart

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sounds

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monitor

the

RESET

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cable

blinks

breathing

blinks

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come

off,

switch
button,

into

beat.

from

slide

hold

switch

this

once

effort.

once

this

in

to

OFF

an

jack.

each

each

here.

switch
the

to

without

alarm

time

time.

RESET

OFF.

will

the

the

to

If

Page

2-2

WARNING

(h),

or

you

Do

may

not

not

cover

hear

the

the

alarm

alarm.

speaker

July

1993

Model

9500/9550:

Technical

Manual

Back

Panel

Back

Panel

3329249360220

200004220004

Serial

@

Battery

This

Battery

This
battery

Interface

This
and
connected

O2

©

On
pulse
use

included

Number

Charger

is

where

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green

heart

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the

with

light

charger

output

rate.

to

Model

oximeter

the

with

is

monitor.

you

turns

is

used

Other

this

(9550

9550,

that

this

Jack

plug

in

Light

on

properly

for

recording

accessories

output.

series

this

your

doctor

Instructions

device.

the

battery

to

indicate

connected.

only)

is

the

may

charger.

that

the

respiration

may

also

be

input

have

for

for

use

you

are

ECG

©

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©

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Controls

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the
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or

©) Function

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display

a

memory
sage,

dealer's

and

are

Alarm

jack

is

controls

alarm

homecare

limits

change

you

will

status.

“Memory

instructions.

RESP

outputs

Outputs

for

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for

an

optional

are

used

for

these

dealer

Display

first

turn

show

the

If

the

Full,”

accessories.

alarm.

with

the
breathing
settings
tells

unless

you

on

your

limits

display

follow

to.

display

and

heart

monitor,

for

alarms
shows
your

to

rate.

the

doctor

this
and

the

mes-

homecare

set

July

1993

Page

2-3

Accessories

Accessories

These
signals

accessories.

accessories

and

carry

pick

them

up

to

the

your

Model

patient's

monitor.

9500/9550:

breathing

Use

only

Technical

and

Aequitron

Manual

heart

approved

beat

Electrode

The
ing

Rinse

day.

because

beat
Rinse

not
where
can
beat

Page

black

and

use

interfere

2-4

electrode

heart

the

flat

Do

not

both

signals.

all

soap

oil,

the

electrodes

signals.

Pads

beat

signals

sides

of

use

soap

interfere

off

the

powder,

with

picking

pads

the

pads

or

detergent

with

patient

or

lotions

will

pick

up

from

the

with

breath

after a bath.

on

be

placed.

up

breath

the

breath-

patient.

water

on

the

and

the

patient

All

and

each

pads

heart

Do

these
heart

Belt

The

soft
place.
fastened

Remove
belt.
washing machine

lukewarm
bleach.
because
rash.
automatic
inside

The

the

You

Air

of

foam

belt

holds

belt

goes

with a Velcro

electrode

can

wash

using

water, a mild

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leftover

dry

dryer

the

well

detergent

the

belts.

because

belt.

the

around

strip.

pads

before

belts by

the

detergent,

to

remove

Never

heat

electrode

the

chest

washing

hand

delicate

all

can

cause a skin

dry

them

damages

pads

in

and

the

or

in

the

cycle.

Use

and

no

detergent

in

the
the

July

1993

is

Model

9500/9550:

Technical

Accessories

Manual

Lead

The
beat

them

wires

necting
can

New
you
gently
you

Wires

lead

wires
signals
to

the

by

the

or

disconnecting

damage

lead

wires

connect

to

separate

need

to.

pick

from

patient

plastic

the

wires

come

the

patient

up

the

the

electrodes

cable.

ends

inside

joined

the

lead

breath

Always

when

them;

the

to

the

wires

and

and

hold

the

you

are

otherwise,

lead

wires.

together.

monitor,

as

much

heart

carry

lead

con-

you

When

pull

as

Patient

The

patient
heart
carries
has a locking
the
when
Never

damage

beat

the

monitor.

you
pull

the

Cable

cable

signals

signals

Hold
are
on

wires

picks

to

connector

the

connecting

the

cable’s

inside.

from

the

patient

up

the

the

lead

monitor.

where

or

cord

it

cable

disconnecting

because

breath

wires

The

cable

attaches

at

the

you

and
and

to

end

it.

can

duly

1993

Page

2-5

Model

9500/9550:

Technical

Manual

Page

2-6

July

1991

Theory

of

Operation

monitors

The

detects
Human

logged.
recorded.
oxygen

pulse

The

It

rails. A watchdog

and

The

analog

phone

plug

For
power
system.

The

current
atory

signals,

tions,

and

desaturations

oximeter.

monitor

also

has

is

executing

monitor

board,

jack

into

this

system,

isolated

for

signals.

detects

are

alarms

events,

Trend

The

9550

has

circuitry

consists

the

board and

the

back

theory,

the

The

power

section

respiration

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and

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events,

intended

for

equipment

and

waveform

series

when

an

audible

which

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the

software

of

digital

panel

we

will

isolated

system

provides

analog

and

for

use with

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in

conjunction

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the

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back

board

monitor

the

the

patient

and separates

processes

digital

data.

infants

tachycardia

monitor

for

human

detect,

loss

microprocessor

correctly.

panel,

analog

power

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section

of

are

into

the

any

record

of

and

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four

system,

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through

and

on/off

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with

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dB(A)

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front

the

main

and

for

supplies

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adults.

bradycardia.

times

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at 2 feet).

of

the

is

panel,

battery.

boards

parts:

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the

and

respiratory

are

are

also

validate

external

power

running

the

The

that

the

digital

monitor.

the

drive

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It

July

1991

Refer

to

the

letters
is
panel,

A, D,

located: A =

and F =

Block

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R,

and F indicate

analog

front

panel.

on

page

the

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board

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block

where

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board, R =

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rear

(or

Page

the

circuit

back)

3-1

Power

System

Model

9500/9550:

Technical

Manual

Power

System

Refer

to

the

Block

The

Model

provides

is

provided

from

damaging

(greater

microprocessor.

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battery

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charged

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can

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battery

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and

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monitor

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through

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power

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at

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the

device.

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days

in

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front-panel

the

alarm

set

off

the

in

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called

to

the

on

charger

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mA. The

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at

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on a fully

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hours.

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alarm)

RESET

switch.

current.

Vp.

RAM

page

3-10.

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charging

which

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prevents a shorted

Z1,

prevents

the

unit

nickel-cadmium
2000

mAH

(milli-amp

11

and

12

VDC.

charged

through a parallel

switch),

911
if

the

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is

chips

battery

after

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derived

and

real

maintain

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from

time

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or

(NiCad)

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alone.

which

switch

F1,

protects

on

VB
clock.

charger

input

voltage

resetting

cells

hours).

monitor

The

set

of

switches

it

is

known

power

is

turned

the

protected

and

provides

that

current

jack

spikes

the

con-

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battery

as

in

the

off

the

rest

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provides
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analog

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back

back

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30
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of

that

panel

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kHz.

Tl.

section.

circuit

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rectified by

section
patient

where

signal.

the

voltage

the

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ground

board.

on

the

U4

is

an

frequency

duty

cycle.

provides

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it

is

regulated

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analog

astable

is

This

the

T1

also

provides

for

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various

recorder,

and

chassis

are

also

+5 V supplies,

down

to

ground

connected

board.

multivibrator

set

by

R34

and

signal drives Q 1

negative

couples

the

voltage

the

power

regulators

Vs

(+5

operating

C19.

which

V-,

30

kHz

and

carrier

V+

V)

by

are

tied

together

at

The

drives

filtered

through

frequency

in

the

monitor:

and

V-

VR2.

together

(with

back-to-

approximately

output

by

to

at

the

C30

the

primary

isolated

for

on

U4-10

and

for

the

the

the

Page

3-2

July

1991

Model

9500/9550:

Technical

Manual

Isolated

Section

Isolated

Section

Power
by T1.

develops

isolated
negative

Resistors
(CR14

ly + 10
the

imately
patient

for

The

the

positive

power

and

VDC.

patient

50 uA.

impedance

the

diodes,

positive

R64

CR15),

drive.

isclated

CR16-CR19,

power

rail

is

and

R63

These

C39

and

R65

Since

(typically

section

and

negative

rail

filtered

limit

diodes

C40

and

R65

and

is

the 30

block

R66

500

essentially a constant-current

patient

RA

appear

voltage

2

small

impedance

amplitude-modulates

R78,
instrumentation
protection
the

and

mV

R79

patient

impedance

LA.

The

across

source

in

amplitude.

change

of

and

to

or

amplitude-modulate

respiration-modulated

R67.

The

patient

within

in

the

The

impedance

500

to

patient

respiration

1000

the 30

diodes

the

to

CR23-CR30

amp.
circuitry
the

Surge

patient

if

an

cable

is

derived

form a full-wave

power

filtered

by

R70

set

limit

R66

to

for

by
and

kHz

current

the

drive

any

low

the

are

significantly

1000

source.

30

ECG

signal

generating

signal

(0.2

to 3 ohms)

ohms.

kHz

arrestors

electrostatic

The

carrier

provide

input.

from

the

the

isolated

R71

and

C41.

C38.

for

voltage

frequency

patient

ohms),

current

the

Therefore,

the

30

KHz

kHz

signal

can

be

signals

can

be

out

change

signal.

input

El, E2,

discharge

30

kHz

provided

rectifier,

section.

The

isolated

the

zener

to

approximate-

modulation

to

approx-

larger

than

patient

changes

voltage

and

the

thought

between

thought

of a total

in

impedance

protection

and

E3

is

delivered

which

The

diodes

the

drive

in

the

across

ECG

of

as

0.1

and

of

as

body

to

the

provide

of

is

a

a

to

July

1991

The

instrumentation

extremely

the

ECG

C33 and

modulated

signal.

C36

T2

blocks

low-pass

signal.

provides

92
carrier
ofthe

between

build-up.

U8-12,13,14

and

for

analog

amp

high

input

impedance,

and

respiratory

R56

form a high

30

kHz

signal

couples

DC

filter.

the

while

This

respiration

the

filters

provides a gain

low-pass

93

provide a full-wave

the

isolated

filtering

ECG

board.

and

signal.

R57

U8

(pins

with a differential

signal.

pass

filter.

to

the

primary

signal

network

out

the 30

with

an

chopper

T3

couples

and

R39

form a high

non-isolated

1,2,3,

This

of

L1,

kHz

of

fe

of

it

grounds

5,6,7,

couples

of

T2

to

the

R74

carrier

about

100

(at

30

to

the

8,9,10)

gain

the

and

blocks

non-isolated

and

C87

leaving

nine,

Hz.

kHz)

that

non-isolated

impedance

to

limit

offset

provides

of 5 for

respiration-

the

provides

the

while

acts

an

both

ECG

section.

ECG

C35

as

the

section

connection

voltage

Page

3-3

a

Analog

System

Model

9500/9550:

Technical

Manual

Analog

System

ECG

Channel

The analog

and,

in

the

processes

the

monitor's

Refer

to

the

R35 and
be
controls

filtered

U6-1,2,3
table
DC

used

(R40

via

offset

C21

to

analog

provides

R93.

for

U6-12,13,14

12,13,14

60

12,13,14

U6-1.

signal

AC

two

is a bandpass

Hz

with

is

U6-5,6,7

at

50

line-frequency

signals.

system

9550

series,

the

ECG

outputs

Block

Diagram

provide a 90°

demodulate

switch

and

C22),

variable,

C42

rolls

the

rest

and

U6-5,6,7

R94

acting

180°

out-of-phase

sums

or

60

Hz)

noise.

consists

and

and

of

the

oximeter

respiratory

the

on

phase

the

ECG

U5-3,4.

and

DC

non-inverting

the

signal

of

the

ECG

form a line-frequency

filter

whose

as

the

the

signals

to

provide a signal

R92

the

ECG

digital

page

shift

signal.

The

ECG

blocked

off at

channel.

tuning

with

from

is

used

and

channel.

signals.

system's

3-11.

in

the

signal

(C23).

gain

about

passband

element.

the 50

U6-1

to

adjust

respiration

The

It

supplies

inputs.

30

kHz

The

demodulator
is

from

50

can

The

or

60

and TP9

at

TP10

the

channels,

analog

signals

signal

so

demodulated

13

to

31,

Hz.

R95

notch

be

filter.

tuned

output

Hz

noise

signal

(the

that

has

summing

system

for

it

can

signal

and

adjus-

sets

the

U6-

to

50

or

of

U6-

at

inverted

limited

of

the

Page

3-4

U6-8,9,10

Butterworth

about

Interface

divided

J5

U7-1,2,3

with
will
or

U7-8,9,10

will

voltages
voltage

40

Hz.

connector

by

(ECG

Low)

acts

gain

of

ring)

and

reversed.

pass

through

held

at

R56,

C44,

low

pass

The

R47

and

for

as a bandpass

about

will

detect

is a peak

on

C48

U7-10.

filter

output

(J5)

R46

use

by

24,

detector.

CR22

decay

R55,

C28,

with

of

this

through

and

again

Holter-type

filter

This

filter

heartbeats

Positive

and

off

R52

unity

section

R48 (ECG

sent

recorders.

(center

is

lightly

whether

be

held

through

and

C43

gain.

The

is

sent

High).

to

the

frequency

damped

RA/LA

voltages

on

the

R96

form a third-order

corner

Interface

(heartbeats)

capacitor

if

there

to

the

The

(i.e.,

leads

frequency

back

signal

connector

of

about

the
are

is

no

at

C48.

positive

July

is

panel

is

also

40

Hz)

output

correct

U7-8

The

1991

Model

9500/9550:

Technical

Manual

Analog

System

LEAD

Alarm

Respiration

Channel

U7-12,13,14
and

C5

filter

with

the

unfiltered

low

to

high

when a heartbeat

The

ECG

signal

J12-5

and

controls

microprocessor

Refer

U1-5,6,7

corresponds

is

Its
Nominally,
a

Refer

respiratory

provides

divided

then

lead

90°

phase

switch

to

the

Block

acts

to

by

R2

transmitted

patient

alarm.

to

the

Block

shift

signal.

U5-1,2.

non-inverting

and

V-

the

ECG

version

(high

receives

Diagram

as a peak

the

impedance

and

R104,

impedances

Diagram

in

the 30

The

R28

and

provide

signal

or

low)

the

gate

the

detector

over

kHz

demodulator

C14

gain

the

ECG

at

U3-2 such

at

U3-3.

is

detected.

arrives

of

Q1,

signal

on

page

across

then

sent

the

data

greater

on

page

signal . This

filter

of

gain

signal

with a DC

that

it

can

The output, U3-1,

on

the digital

which

via

its

data

is

board
fed
bus.

into

3-12.

providing a voltage

the

patient

to

input 3 of

bus

than

3-12.

is

signal

the

respiratory

of

about

to

the

1800

R35

used

controls

18.

leads.

the

A/D

microprocessor,

ohms

and

C21

to

demodulate

signal.

offset.

be

compared

changes

at

connector

Port

at

TP2

This

voltage

via

will

provide

the

U2-1,2,3

R23

from

A.

The

that

J12-6.

cause

the

analog

a

R11,

C13,
Butterworth
about 5 Hz.

U2-12,18,14

depending

CRI

and

CR2

these

going

swings

makes
CR2,
output

two

into

saturation,

in

its

large

and

the

(U2-14)

U2-8,9,10

recovery
cy
about 9 Hz.

of

amp

0.07

connector,
filtered

the

by

Interface

R15,

C16,

low-pass

provides

on

the

adjustment

are

5.1 V zener

diodes

and

output.

swings,

signal

from

functions

(U2-12,13,14).

Hz

and

R14

The

output

J5, via

the

R50

C24, C25,

connector,

R29,

C15

filter

with

unity

an

inverting

of

R20.

diodes.

R7

keeps

hence,

If

the

inversion

the

output

diodes

allowing

CR3

in

saturating.

as a bandpass

C12

and

C7

give

of

U2-8

goes

as

the

RESP

R30,

R32

J5

(Resp

and

U2-5,6,7

gain.

gain

of

The

the

voltage

it

to

recover

of

U2-7

and

CR4,

U2-12,13,14

filter

and

and

R9

give a lower

an

upper

out

to

High

signal.

network

Filtered).

form a third-order

The

corner

between

current

output

300

flowing

of

quickly

(between

the

C17

zeners

combine

as a buffer

corner

the

and

In

addition,

corner

back

panel

The

again

freguency

output

frequency

and

through

U2-14

from

and

from

large

R19)

CR1

to

keep

for

the

frequen-

Interface

also

goes

out

the

output

is

600,

and

the

fast

of

is

to

July

1991

Page

3-5

Digital

Oximeter

System

Channel

is

divided

back

R1

and

off

the

C11,

Oofthe

by

R49

panel

as

R8

provide a DC

respiratory

and

buffered

A/D

(U10)

microprocessor

Refer

to

the

Block

The

oximeter

the

percentage
proportional
directly

back

sends

to

out

the

via

of

the

and

R51,

RESP

signal

by

U1-1,2,3.

via

P12-4.

the

Diagram

out

oxygen

heart

on

the

DC

Low

signal

offset

at

at

10

It

data

bus.

on

two

signals.

saturation

rate

(Pulse

Interface

blocked

for

U1-14

Hz.

The

From

is

converted

page

3-13.

One

(O2

Rate).

connector

Model

9500/9550:

by

C29

use

by

and

at

signal

here

the

and

is a voltage

SAT).

These

Technical

and

delivered

Holter-type

U1-8.

is

C8

filtered

signal

goes

transferred

proportional

The

second

two

signals

(J5).

Manual

to

the

recorders.

and

C9

roll

by

R27

and

to

input

into

the

is a voltage

are

to

fed

Digital

System

Microprocessor

U2-1,2,3
of 4 to
is

prepare

on

input 4 of
signals
data

bus.

Refer

to

The

digital

chips,

serial
tery

the

port,

back-up

performs

monitor's

The

65C02

bus

and

by

crystal

U14

provides

the

data

and

U2-12,13,14

the

the

are

converted

the

Block

system

system

and

input/output

for

calculations,

memory.

microprocessor

16

bit

address

Y1

and

time

bus.

act

as

buffer

Pulse

Rate

and

O2

A/D

and

Pulse

and

transferred

Diagram

consists

on

page

of a microprocessor

memory, a watchdog

hardware.

portions

the

and

of

detects

is a low-power

bus.

U4

oscillator

date

the

digital

events,

It

runs

information

op

amps

with

SAT

Rate

to

the

signal

for

goes

in

microprocessor

3-14.

circuit, a real-time

The

monitor

system.

and

device

at a 1

MHz

The

stores

using

clock

circuit.

to

the

microprocessor

nominal

the

on

with

provides

digital

rate

A/D.

O2

input

5.

via

its

support

clock,

system

data

in

an 8 bit

provided

gains

SAT

The

the

a

bat-

the

data

via

Page

3-6

U10

is

decoded

1

MHz
means
to

each

an

eight

to

select

clock

as

that

eight

distinct

input,

one

of

its

timing

bits

can

voltage

elght

the

eight

reference.

define

level

being

bit

A/D

inputs.

256

converter.

It

uses

the

It

uses a 5 V reference

different

about

19

voltage

mV.

AO,

Al,

A2

are

microprocessor

which

levels

leading

duly

1991

Model

9500/9550:

Technical

Manual

Digital

System

Memory

Watchdog

U2

is a Versatile Interface

two

bidirectional,

provides

Two

and

U9
via a serial

general,

the

ports,

the

LCD

provides

the

U7

munications

The

two

RAM

that

are

recorded

of

available

The

software

U13.

The

serial

that

the

checksum

The

watchdog

operate

one-shots
keeps

at

will

is
the
microprocessor

(PB-7).

low

second

U16-5

U16-4

be

turned

MONITOR

for

properly.

(U17},

turns

supplied

off.

This

12

mSec,

one-shot

continuous

the

active

toggles
mSec,

high
and

the

then

(which

the

audible

low

communications

eight

timing

and

U8, are

via

the

the

interface

six

signals

between

chips,

by

storage

for

the

number

circuit

The

and a flip-flop

low

and

on

to

R36

and

LED

is

turned

toggles

signal

The

output

high

output

SET

line

watchdog

the

one-shots

ultimately

alarm

bit

for

the

data

to

sent

the

U1]

and

the

monitor.

space

system

for

for

each

causes

watchdog

U16-4

Q12.

Q12

the

circuitry

C31

off

the

triggers

output

of

(U16-8)

input

turns

is

Adaptor

ports

for

the

microprocessor,

interrupt

output

bus.

communicate

port

and

cycle.

ports

in a standard

received

microprocessor

U12,

provide

About

is

used.

is

stored

the

unit

EPROM

an

in

is

js

alarm
circuit

also

unique.

if

(U16-4,5,6,8,9,

high

for

about

turns

provide a delay

initially,

watchdog

the

of

(U17-10)

the

faster

time

on the

turned

(VB

first

the

first

second

of

the

than

out,

on

on

Q11

to

VA)

Every

circuit

one-shot

one-shot

to

one-shot

flip-flop.

U16-8

MONITOR

via

СУБ).

used

44

the

the

consists

This

for

controlling

with a personal

RS-232C

by

this

and

the

storage

kB

of

these

socketed

stored

microprocessor

of

10).

four

seconds.

and

ensures

even

if

the

at

start-up

16

mSec

input

output

(U17-7)

go

high

for
(U17-10)

If

the

12

mSec

U16-11,12,13

goes

LED

or

low,

on

chip

provides

The

VIA

the

computer

format.

chip

allow

computer.

space

in

two

On

for

chips'

EPROM

the

EPROM

retriggerable

start-up,

The

that

on/off

to

ensure

(nominally)

through

(U17-7)

triggers

50

mSec,

is

sent

microprocessor

slower

than

U16-10

the

front

and

Q10.

also

LEDs

com-

events

64

kB

chip,

fails

C32

high

power

switch

that

the

Port

to

the

The

50

goes

panel)

In

so

to

B

go

to

July

1991

Page

3-7

Digital

System

Model

9500/9550:

Technical

Manual

Alarm

LED

Drivers

and

refer

to

the

Block

Diagram

each

time

the

monitor

generates a signal

(PB-3). A high
Resp

sense

The

HEARTBEAT

The

microprocessor

through

LED

and

Human
loud

{battery,

audio
button
alarm.

The

U16-4
©10
goes

The

sent
on

alarm

signal

audio

is
low,

loud

out

Q10.

alarm

is

is a high

off

turns

line

of

the

LED

blinks

Port B (PB-4). A high

the

ECG

sense

conditions

at

one

lead

or

monitor)

notifies

pressed),

alarm

U16-11

alarm
through
Q10

and

can
which
no

alarm

goes

can

Port B (PB-5),

drives

on

page

3-15.

detects

on

the

on

Q6.

Interface

generates a signal

line

second

the

user

of a battery

be

turned

means

high,

be

turned

the

audio

breathing

data

bus.

Q6

drives

connector

each

time

the

turns

of

the

Interface

(apnea,

intervals.

cause a loud,

sounds.

heart

of

actions

caution

on by

U16-11

Q10

is

If

turns

on

by a low

putting a low

alarm.

The

effort.

It is

sent

the

(J5).

monitor

on

on Q5.

slow,

Equipment

continuous

taken

alarm,

the

watchdog

low

(assume

the

watchdog
on

from

RESPIRATION

The

microprocessor

out

through

RESPIRATION

detects a heart

the

data

bus.

Q5

drives

connector

or

(for

or

and

at

the

heart

failure

alarm.

example,

of

an

circuit.

U16-12

times

drives

the

microprocessor,

U16-12

LED

Port

LED

and

It

is

HEART

(J5).

fast)

cause

conditions

The

when

invalid

Normally,

is

out,

the

alarm.

and

turning

blinks

B

the

beat.

sent

BEAT

a

soft

a

limits

high).

U16-4

Page

3-8

The

soft

audio
microprocessor,
U23-1,2,
audio

alarm,

A

loud

If

this

audio

A

fault

as

described

12,13)
and
invalid

Alarm

drive
through

front

which

alarm

through

hence,

audio

happens,

alarm.

sensed

is

also

fed

through

limits

conditions

for

the

alarm

Port

panel

LED.

alarm

This

earlier.

alarm.

C. A low

alarm

sent

turns

reducing

U15-7

by

driven

Port B (PB-2).

is

out

on

R45,

the

will

also

goes

will

occur

the

watchdog

The

by a signal

are

detected

LEDS

is

at

turned

through

Q9

with a high

which

alarms

be

generated

high,

if

the

final

drive

through

provided

the

output

on

by a low

Port B (PB-6).

at

limits

timer

The

the

sound

turning

output

if

internal

will

circuitry

generated

MONITOR

current

Vp

on

fuse

turn

software

by

the

microprocessor

pin

of

Port

generated

This

its

gate.

flow

level.

or

Vs

Q8,

which

(F1)

on

(U5-13,11

by

the

LED

will

in

the

C will

by

is

inverted

Q9

drives

through

are

pulled

low.

drives

blows.

the

MONITOR

and

microprocessor

flash

monitor.

turn

for

data

on

July

LED

U23-

The

bus

1993

the

by
the
the

the

an

the

Diagram

95xx

System

Block

Diagram

Front

3-9

Page

Biock

System

9500/9550

Manual

Technical

|

Oximeter

:

|

Battery

Charger

4

m-

Patient

|

ГЕ

|

power

PY

|

Ey

ES

V-

ma

Pulse

| |

o,

‚| | {isolated

№

Va

Vp

V

Rate

sai

Section!

7

Interface

|

Resp

ECG

Connector

Lead

Channel-

Channel

-

Alarm

y

о

|

4—3]

>

dizi

A

lo

A/D

e

Computer

Interface

Ts)

in

>

」

ACIA

£

|

Micro

Processor

Е.

Rear

Switches

Switches

+i

>

LCD

LEDs

&

Data

Storage

(RAM)

Alarms

Panel

&

9500/9550:

Model

Vico

1991
July

9500/9550

Power

Distribution

Model

8500/9550:

Technical

Manual

RT

Clock

95xx

Power

Distribution

Page

<

3

3-10

VRI

y
一

+5V

+5.4V

July

1991

3-11

Channel

ECG

ECG

Channel

Isolated

Power

Supply

mentation

Instru-

Page

»

to

rear

panel

Manual

Technical

9500/9550:

Model

DC

Offset

and

Comparator

D

Port

Peak

Detector

1993

duly

Manual

1991

July

Technical

9500/9550:

Model

Alarm

Channel/Lead

Respiratory

>-

|

to

k

A

rear

»

Palient

A

30

KHz

and

Ti

A

Signal

Conditioning

A

isolated

Power

Supply

panel

А р

Lead

Alarm

|

Demodulator

Channel

4

»i

Conditioning,

"|

4

A/D

Instrumentation

FT?

A

A

Signal

A

Breath

Detect

/

Lead

A A

Amp

A

Third

Order

A

->|

Amp

Buffer

pass

Low

4

Alarm

À

High

Pass.

Filter

D D

A/D

Port

D

A

&

Baseline

Recove

>

A

Fast

‘Amp

T2

>

n

7

yi

Amp

Micro

Processor

A

3-12

Respiratory

Page

Model

9500/9550:

Technical

Manual

Patient

Pulse

Rate

Oximeler

I

O,
Sat

Oximeter

っ

Зо

991%

>

X

N

BO

m

ok

0
a

8

a

J

W

q

<

à

|

Oximeter

.

"|
Pulse

Rate
|

A/D

LP

Oximeter

Interface

U

Processor

Micro

R

|

O,

Sat

A/D

D

Connector

Interface

R

July

1991

Page

3-13

Microprocessor

Hardware

Processor

Micro

xtal

Model

9500/9550:

Technical

Manual

Microprocessor

(SSA

we,
o

[0200

Data

Bus

(8
bits,

DO

to
D7)

Vp

Oximeter

Lead

Resp

OE, STARI,

HLE

Bus

(16

bits,

AO

to
A15)

Hardware

Page

3-14

[+

Serial

Interface

»

July

1991