Nellcor N-200 User manual

NELLCOR

N-200
Pulse

Operator’s

1988

Oximeter

Manual

NEL-15

TABLE

}

Quick

Guide

to

|.

Operation

Introducing

the

NELLCOA

N-200

Pulse

OF

Oximeter

CONTENTS

Page

|.

ON.

IV.

Operating

Controls,

Basic

Use

Battery

Warnings

NELLCOR

Connecting

Connecting
Connecting
Connecting
Connecting

the

N-200
Displays,

Front

Panel

Rear

Panel

Patient

of

Pulse
Alarm

C-LOCK

Module

Operation

Special

Tone

Functions

ECG

Operating

Trend

and

Powerbase

Operation/Portable

Sensors

the

N-200

the
Other
the

Other
Setting
RS-232
Setting

the

Pin

the

and

Connectors

(Monitor)

(Powerbase)

Features

Synchronization

Modes

Event

NELLCOR

Memories

to

Other

Strip-Chart

Instruments

N-9000

Recorders

Hewlett-Packard

Digital

Baud

Assignments

RS-232

Devices

Rate

Communication

Use

Recorder/Intertace

ThinkJet

Printer

Port

Format

_

CG

O

UG

OD

ON

O

25

27

.

‚

27
27
28
29
29
29
30

ЗЕ:

Cpe

V.

Troubleshooting

Vi.

Principles

Vil.

Unpacking

VIII.

Service

IX.

Specifications

_

X.

Glossary

Xl.

Warranty

NELLCOR

OXISENSOR,

of

Operation

and

Checking

and

Maintenance

Configuration

Performance

Environmental

Electrical

Physical

Qualifying

and

Characteristics

Characteristics

Information

DURASENSOR

OXIBAND,

Guide

_

΄

the

Requirements

are

and

C-LOCK

N-200

registered

are

trademarks

trademarks

of

Nellcor

of

Nellcor

Incorporated.

Incorporated.

33

38

41

42

46
47
47

49

51

ㆍ

|

QUICK

GUIDE

TO

OPERATION

1.

If

desired,

other

end

"Hospital

2.

Align

the

CONNECTION

(see

page

3.

If

C-LOCK™

4.

Select
the

5.

Press

6.

Check

For a quick

an

sensor

the

the

plug

one

into

a

properly

Grade"

red

dot

(see

on

socket

7).

Do

NOT

ECG

appropriate

directions

ON/STDBY

alarm

guide

limits.

to

using

end

of

the

power

grounded

page

7).

Alternatively,

the

connector

of

the

monitor,

twist.

synchronization

NELLCOR

for

use.

switch

If

necessary,

the

sensor

Plug

to

the

special

Basic

cord

to

100

to

120

at

the

end

and

push

is

to

be

used,

and

the

sensor

ON

position

adjust

features

Operation

the

NELLCOR®

vojt

AC

operate

of

the

the

connect

apply

into

the

(see

them

to

of

the

N-200,

outlet

marked

on

internal

patient

module

connector

an

appropriate

it

to

the

patient,

patient

page

7).

suit

the

needs

refer

N-200

pulse

"Hospital

battery

with

straight

following

module

to

of

the

(see

the

next

oximeter.

for

up

the

red

in

until

it

ECG

signal

the

pages 7 and

patient

page.

Plug

Only"

or

-

to

two

hours.

dot

on

the

locks,

(see

instructions

24).

(see

page

the

page

8).

7).

in

зы
..

5

|
2

.

一
一

!

Warning:
operating

manual

Warning:

for

complete

This

“Quick

the

NELLCOR

before

attempting

Carefully

description,

Guide

read

to

Operation”

N-200

the

pulse

clinical

use

directlons

Instructions,

Is

intended

oximeter.

of

the

instrument.

for

use

warnings,

`

only

Carefully

provided

cautions,

as a checklist

read

this

with

each

and

specifications.

for

operator's

NELLCOR

sensor

oy

3
à

an

ail

1.

If

desired,

other

end

"Hospital

2.

Align

the
CONNECTION
(see

page

3. f C-LOCK"

4.

Select

the

5.

Press

6.

Check

For a quick

an

sensor

the

the

guide

plug

one

end

into a properly

Grade"

red

7).

appropriate

ON/STDBY

alarm

(see

dot

on

the

socket

Do

NOT

ECG

synchronization

directions

limits.

to

using

page

of

twist.

NELLCOR

for

switch

If

the

QUICK

of

the

power

grounded

7).

Alternatively,

connector

the

use.

necessary,

special

at

monitor,

is

sensor

Plug

the

to

the

features

GUIDE

Basic

cord

100

to

the

end

and

to

be

and

sensor

ON

position

adjust

TO

Operation

to

the

NELLCOR®

120

volt

AC

operate

of

the

patient

push

the

connector

|

used,

connect

apply

it

into

the

(see

them

to

of

the

N-200,

OPERATION

N-200

outlet

marked

on

internal

module

straight

an

appropriate

to

the

patient,

patient

page

suit

7).

the

refer

module

needs

to

pulse

“Hospital

battery

with

in

following

(see

of

the

the

next

oximeter.

Only”

for

up

to

the

red

dot

until

it

locks

ECG

signal

the

pages 7 and

patient

page.

Plug

the

or

two

hours.

on

the

(see

page

instructions

(see

page

in

24),

8).

7).

i

Warning:
operating
manual

Warning:

for

complete

This

“Quick

the

NELLCOA

before

attempting

Carefully

description,

Guide

read

to

Operation”

N-200

the

pulse

clinical

use

directions

instructions,

Is

intended

oximeter.

of

the

Instrument.

for

use

provided

warnings,

only

Carefully

with

cautions,

as a checklist

read

this

operator’s

each

NELLCOR

and

specifications.

for

sensor

A

ise

Ton

Use

of

Operator's

Special

Actions

Features

1

Le!

に

Eq

adjust
(see

Alarm

check

(see

adjust

(see

adjust
alarm

(see

-temporarily
silence
(see

adjust
during
audio
temporarily
silenced
(see

volume

page

9)

Functions

alarm

page

8)

alarm

page

8)

audio

volume

page

10)

audio

page

10)

period

which

alarm

page

10)

of

“beep”

limits

limits

alarm

the

is

turn

control

press
(HIGH
or

LOW

press
(HIGH

|

or

LOW

,

until

press
buttons,

desired

press

press
and
desired

(30-120

knob

appropriate

SAT,

LOW

RATE)

appropriate

SAT,

LOW

RATE),

the

new

setting

LOW

SAT

and

turn

setting

AUDIO

AUDIO

turn

appears

ALARM

ALARM

control

setting

seconds)

alarm

SAT,

alarm

SAT,

HIGH

and

turn
appears

and

HIGH

control

OFF

OFF

knob

until

appears

button

HIGH

RATE,

button

RATE,

control

SAT

knob

until

(10-100)

button

button,

knob

none

current

appears

new

new

AUDIO
indicator

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setting

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setting

setting

ALARM

setting

|

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lights

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Memory

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audio

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11)

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14)

Functions

15)

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press

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press

buttons,

press
buttons

year

to

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set

AUDIO

turn

ALARM

control

appears

HIGH

RATE

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SAT

(flashing

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month,

day,

knob

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and

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and

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OFF

button,

LOW

RATE

knob

RATE

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knob

sequentially

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minute)

“OFF”
ALARM

flashes

number

appears

last
appear
hour,

appears;

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or

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digits

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minute)

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day,

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on

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defined

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pages

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page

entire

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page

page

on

on

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limits

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user-

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21)

15

event

ThinkJet

18)

event

strip-chart

18)

alarm

22)

strip-

and

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press

TREND

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pause
by a strip-chart
button

press

press
(to

pause,

press

and
knob
(to

again

alarm

control

press
OFF
turn

duration

release

when

again)

EVENT

EVENT

press

applicable

the

EVENT

until

desired

make

limits,

press

knob

until

HIGH

RATE

buttons

control

knob

appears

buttons

button

data

recorder,

button

button

EVENT

alarm

button,

setting

event

buttons

“=

and

(“UdE

0”

until

(1-60

to

start

are

being

press

button

limit

and

appears

limits

and

AL”

appears)

AUDIO

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desired

minutes);
the

printed

TREND

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button

turn

control

equal

turn

ALARM

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event

|

none

none

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new

setting

“UdE

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represents

in

minutes

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defined

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page

end

user-defined

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prematurely

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page

determine
of

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page

duration

user-

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21)

21)

number

in

memory

19)

press

HIGH

OFF

buttons

*n"

represents
remaining);

desired

press
OFF

until

press

buttons

duration

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buttons,

“UdE

OFF”

LOW

RATE

(“UdE

the

turn

control

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RATE

and

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and

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ili

of

knob

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RATE

ALARM

where
minutes
until

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knob

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n"

represents

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minutes

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OFF"

“no

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indicates
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appears,

duration

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cancel

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Operator's

press

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turn

control

event

identifier

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the

lights
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knob

press
buttons

control

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knob

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buttons

turn

control

“Prt

End”

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the

Actions

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turn

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press

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least

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turn

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Display

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that

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trend

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page

Software

determine

software
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page

determine
software
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page

whether

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are

22)

trend

and

22)

Version

monitor

version

42)

powerbase

version

42)

disabled

Codes

code

code

.

press

HIGH

AUDIO

press
AUDIO
control

(to

control

press

OFF

until
SATURATION

press

OFF

the

ALARM

HIGH

ALARM

knob

reactivate,

knob

HIGH

buttons,

“0”

appears

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buttons,

left

until

SATURATION

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OFF

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press

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and

and

in

display

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buttons

RATE,

buttons,

buttons

On"

AUDIO

turn

control

OXYGEN

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turn

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and

and

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OXYGEN

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to

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PULSE

version

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RATE

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m
:

The

NELLCOR®

functional

INTRODUCING

N-200

oxygen

pulse

saturation

THE

oximeter

of

arterial

NELLCOR

accurately,

hemoglobin

non-invasively,
and

N-200

pulse

rate.

PULSE

and

continuously

OXIMETER

measures

Measurements

ments

qualitatively.
saturation,
ing

the
either
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Because

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unless

NELLCOR
be
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rising
system
operator

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oxygen

and

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measurements
accuracy
perfusion

sensors,

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lightweight

number

of

C-LOCK™

and

in

patiénts

Three
clinical
pulse

operating

settings.

beat.

Additionally,

allows

of

patients

patient-safety

are

displayed

digitally

the

as

saturation

the

operator

changes

saturation

is

is

and

ECG

in

alarms

are

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which
ranging

completely

synchronization

with

poor

modes

In

all

three

both

visibly

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are

tone

that

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to

monitor

the

patient's

level

or

activate.

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tissue

to

supply

are

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neonates

non-

-invasive,

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performance-enhancing

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The

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sizes

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no

heat

performance

averaging

the

N-200

Oxygen

puise

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adjustable

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component

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Clinical

settings.

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the

N-200

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measurements

pulse

rate

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burn a patient.

changes

early

patient,

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the

instrument

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into

the

such

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use

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notifying

sensors

N-200:

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in

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If

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to

the

ICU,

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。

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sensors

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and

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the

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the

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the

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the

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OXYGEN

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indicator

indicator

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a

display

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Indicator:

pulsa

URATION

percentage

shows

display:

or

LOW

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display

the

yellow

red

indicator

display:

of

the

digital

RATE

7.

Pulse

8.

9.

10.

11.

12.

instrument

red

functional

upper

display

button

amplitude

ECG

IN

USE

ECG

LOST

Caution.
CONNECTION

Control

symbol

knob

on

indicator

indicator

digital

that

that

flashes

display

hemoglobin;

or

lower

that

is

pressed,

|

indicator

indicator

indicator

socket

and

off

lights

when

that

flashes

that

saturation

shows

when

when

the

the

.

13.

14

15

16.

the

five

or

when

the

shows

pulse

display

arterial

the

alarm

rate

HIGH

SAT,

LOW
HIGH

LOW

AUDIO

AUDIO

instrument

fewer

N-200

HIGH

limit

in

shows

LOW

RATE

indicators

SAT,

LOW

RATE

buttons

ALARM

ALARM

minutes

is

hemoglobin

SAT

beats

per

the

SAT,

HIGH

SAT,

HIGH

OFF

button

OFF

indicator

is

operating

of

battery

attempting

oxygen

or

LOW

minute;

upper

or

lower

RATE,

RATE,

to

SAT

when

.

.

on

button

pulse

is

|

3

00000

E

gg

p

i

Pulse
indicates

.

ECG

lights

ECG

the

10.

A

11.

CONNECTION

12.

Control

specific:

limits,

13.

HIGH

to

indicate

indicator

14.

HIGH

alarm

modify

-trend

15.

AUDIO

with

or

disables
sets
user-defined

amplitude

pulse

IN

USE

steadily

LOST

extent

that

Caution:

knob:

buttons,

modifies

SAT,

which

flashes

SAT,

limits

various

and

event

ALARM

the

control

the

clock,

indicator:

amplitude

Indicator:

when

the

indicator:

the

N-200

Before

socket:

adjusts

the

control

various

LOW

SAT,

parameter

when

LOW

SAT,

to

be

displayed;

alarm

memories,

OFF

knob,

the

audio

disables

events

unlabeled

yellow

N-200

red

indicator

locks

indicator

can

no

longer

connecting,

connector

the

volume

knob

functions

HIGH

RATE,

is

beyond

the

upper

HIGH

RATE,

when

functions,

button:

changes

alarm;

and

set

and

set

temporarily

the

when

activates

vertical

that

onto

the

that

flashes

track

refer

to

Operator's

into

which

of

the

“beep”;
modifies
of

the

various

trend

LOW

the

established

pulse rate.

LOW

used

in

conjunction

alarm

and

the

operating

silences

period

used

during

in

conjunction

the

trend

column

flashes

signal

if

the

it

the

patient

when

and

event

RATE

RATE

Indicators:

alarm

limit

buttons:

event

mode

which

and

of

when

ECG

Manual

used

alarm

memories,

alarm

is

with

limits,

the

audio

the

with

event

light

bars

that

the

N-200

signal

module

functions,

is

is

plugged

in

conjunction

sets

and

flashes

limit

(e.g.,

exceeded)

when

pressed,

the

control

modify

audio

the

memories,

various

alarm;

alarm

control

when

qualitatively

locates

lost

or

if

an

it

|

with
alarm
sets

the

during

the

the

HIGH

cause

knob,

these

functions

used

is

temporarily

knob

and

and

initiates

ECG

signal;

deteriorates

and

event

operating

alarm

state

RATE

the

current

buttons

of

the

in

conjunction

silenced

other

buttons,

and

modifies

to

‘Arai

ir
dio

=

vey
viro
mea

16.

AUDIO

silenced;

ALARM

flashes

OFF

indicator:

when

the

audio

lights

steadily

alarm

has

when

been

the

disabled

audio

alarm

has

been

temporarily

Rear

Panel

(Powerbase)

47

18

19

20

21

22

il

17.

18.

A

À

34

17.

ZERO

18.

FULL

19.

SaOz%

20.

VOLT

21.

TREND

22.

EVENT

23.

ECG

ZERO

FULL

depends

button:

button:

a

ELÆCTERCAL

106-120

vé

JA

renace

ens

REPLACE

FUSE

TRAI

ER

RA

НИИ.

-

button

button

SCALE

switch

button

button

IN/OUT

on

NAČ,

-

switch

|

|

connector

provides a zero

provides a full-scale

VOLT

바구

RATER

Sa.

AS

MARKED

OMPI,

EA

ーー

switch

A

|

e

“PNR

|

USAS

=

‚

24,

25.

-

26.

27.

28.

setting)

ar

CI

nale

CUS

T

N

T

ー

33

BAUD

RS-232

ADULT/NEONATAL

ALARM

RATE
SERIAL

volt

signal

signal

_

32

RATE

switches

FORMAT

switch

connector

COMM

on

on

T

AA

31

30

switches - 30.

connector

all

all

analog

analog

outputs

outputs

29 28

29.

SAT

DATA

31.

PULSE

32.

AC power

33,

Fuse

34.

Warning

except

except

2726

25 24

connector

connector

connector

inlet

compartment

symbol

ECG

ECG

IN/OUT

IN/OUT

(voltage

19.

Sa02% SCALE

50%-100%

20.

VOLT
(Note:

21.

TREND

22.

EVENT

23.

ECG
provided
DEFIB

subminiature

Warning:

for

defibrillator

24.

BAUD

25.

RS-232

switch:

This

does

button:

button:

IN/OUT

via

SYNC

The N-200

RATE

FORMAT

switch:

sets

not

initiates a trend

initiates

connector:

the

patient

signal

phone

synchronization.

switches:

sets

the

voltage

affect

an

module)

(when

plug)

ECG

set

switches:

the

analog

output

ECG

input)

memory

event

memory

provides

or

the

ECG

signal

the

baud

set

the

output

range

output

an

analog

an

ECG

signal

output

rate

for

RS-232

scale

for

the

sequence

output

must

sequence

ECG

input

connector

is

provided

NOT

serial

format

for

oxygen

analog

output

communications

signal

from a bedside

be

used

(DIP

switches

saturation

outputs

(when

for

an

as

at

0-1

volt

the

external

ECG

the

input

(DIP

switches 7 and

3,

4,

and

at

0-100%

or

0-10

ECG

signal

ECG

waveform

monitor)

signal

5)

or

volts

is

or

(3/32"

8)

a

—

aiment

|

ADULT/NEONATAL

26.
(DIP

RATE

27.

“0-250

28.

SERIAL

connector

SAT

29.

0-100%

30.

DATA

interface

31.

PULSE

32.

AC

power

33.

Fuse

34.

AA

switch

1)

connector:

bpm

(3/32"

COMM

connecter:

or

50%-100%

connector:

or a NELLCOR

connector:

inlet

compartment

warning:

ALARM

provides

subminiature

connector:

provides

(3/32"

provides

N-8000

provides

Risk

of

fire.

switch:

analog

provides

anaiog

fiber

output

phone

output

subminiature

optic

interface

analog

Replace

sets

the

of

plug)

RS-232

of

oxygen

phone

output

output

fuse

as

defauit

pulse

rate

digital

saturation

plug)

for

connection

of

pulse

marked.

alarm

limits

in

beats

interface

—

to a NELLCOR

waveform

for

adults

per

minute,

via a nine-pin

data

(%SaQ2),

(3/32"

subminiature

or

neonates

with a range

“D"-type

with a range

N-9000

recorder/

phone

of

of

piug)

Patient

Module

37

LA.

i

1

a

!

i

|

に
っ

4

i

ic

,

4

35.

36.

35.

NELLCOR

ECG

connector:

Sensor

sensor

connector

connector:

AAMI-specified

36

connector

socket

for

for

—

36.

the

attaching

as

ECG

connector

plug

an

on

the

ECG

\

end

cable

of

NELLCOR

37.

Velcro

sensors

strap

|

37.

Velero©

strap:

used

for

fastening

the

patient

module

6

to a bedside

support

Basic

Operation

ba

Warning:

read

the

1.

if

desired,

N-200.
Only”
battery.

Never
grade

If

the

ted

itlocks.

Use

20

patient

C-13

lf

C-LOCK

trodes

the

into

waveform

C-LOCK

Improper

“Warnings”

plug

Plug

or

“Hospital

use

an

AC

power

patient

dot

on

the

Do

the

NELLCOR

module.

C/D

or

ECG

to

the

lead

wires

the

patient

(high-level

ECG

use

of

the

section

one

end

of

the

other

end

Grade.”

outlet

that

does

plug

and

cord

module

is

disconnected,

CONNECTION

NOT

twist

the

connector

C-200-13

(If

the

ECG

C-20 C/D

patient

into

module;

synchronization

patient

synchronization

in

standard

the

ECG

alternatively,

output)

N-200

of

the
into a properly
Alternatively,

could

this

manual

power

not

cord

operate

have a grounding

or

an

equivalent

align

socket

on

the front

while

patient

module

cable

module,

connector

may

is

to

be

limb

lead

(observing

used,

connect

from

an

ECG

enhances

stability | in

present a hazard

before

into

grounded

the

attaching

on

be

configuration,

monitor

clinical

the

AC

the

hospital-

red

dot

of

which

the

patient

used

provide

correct

the

DEFIB

to

power

100

to

N-200

connection.

grade

on

the

N-200.

it.

is

supplied

module

instead.)

an

attach

limb

the

high-motion

to

the

patient.

use

of

the

inlet

on

the

120

volt

AC

for

up

to

two

Use

only

plug.

the

patient

ECG

connections),

SYNC

N-200

module

Push

the

with

the

is

not

signal

lead

wires

puise

ECG

IN/OUT

or

low-perfusion

Carefully

instrument.

back

of

the

NELLCOR

outlet

marked

hours

on

the

original

connector

connector

N-200,

necessary, a NELLCOR

as

follows:

to

the

and

plug

output

or

connector.

“Hospital

its

internal

hospital-

with

straight

or

the

C-200-

apply

ECG

electrodes,

the

ECG

the

ECG

OUT

cable

environments.

the

in

until

elec-

piug

See

the

“Use

of

Select
use

Turn

The
Circuitry.
and

synchronization

After

beat-to-beat
“beep”

indicator
alarm

an

appropriate

provided

the

with

instrument

instrument

Then

the

PULSE

four

RATE

to

six

information.

rises

as

begins

limits

in

effect

Special

Features”

NELLCOR

the

sensor.

on

by

moving

emits a “beep”

PULSE

displays

is

being

pulses,

oxygen

to

follow

SEARCH

used

the

digital

The

saturation

the

(see

page 9 for

show a non-flashing

pulse.

section

sensor

Plug

the

sensor

the

ON/STDBY

and

all

displays

indicator

and

an

ECG

OXYGEN

instrument

increases

At

this

the

of

this

manual

and

apply

it

to

into

the

switch

light

momentarily

begins

to

zero.

signal

is

detected.

SATURATION

emits a “beep”

and

falls

time,

the

alarms

default

limits).

for

the

patient,

patient

to

the

flash,

The

ECG.IN

and

with

as

it

decreases.

are

full

instructions.

following

module.

ON

position.

while

the

and

the

OXYGEN

USE

PULSE

each

puise,

The

operational,

the

N-200

display

RATE

and

pulse

displays

the

with

directions

tests

for

its

SATURATION

illuminates

if

begin

pitch

of

the

amplitude

the

default

ECG.

to

show

Normally,

typically

bars,

indicator
actions

lower

perfusion

will

to

for

adults

begin

take

the

for

neonates.

is

inadequate

to

in

this

pulse

amplitude

If

the

to

enable

flash.

(See

the

situation.)

pulse

indicator

amplitude

the

N-200

reaches

to

“Troubleshooting

|

at

indicator

track

shows

the

Guide”

least

mid-scale,

pulse

in

this

less

than

and

manual

while

it

is

two

to

three

the

PULSE

SEARCH

for a discussion

light

of

When
sensor,
Be

sure

instrument.

6.

Check

LOW

To

adjust
button
desired

100%,

minute.

When

values.

7.

To

tum

If

it

is

connector

the

instrument

with

each

to

familiarize

the

alarm

SAT,

HIGH

the

alarm

(HIGH

and

the

necessary

SAT,

value

is

the

The

upper

instrument

the

N-200

and

is

receiving a signal

pulse

beat

yourself

limits

each

RATE,

limits

LOW

displayed.

pulse

rate

limit

must

is

turned

off,

move

to

disconnect

pull

straight

the

time

and

to

meet

SAT,

Oxygen

alarm

be

the

out.

instrument

with

the

the

LOW

RATE

the

HIGH

saturation

limits

higher

off

and

ON/STDBY

the

patient

Do

NOT

from

emits a high-pitched

different

N-200

is

vuttons.

needs

RATE,

may

of a specific
or

be

than

the

back

on

switch

module,

twist

the

pulse

used,

Each

LOW

alarm

set

for

lower

again,

grasp

the

connector

ECG

electrodes

tones

by

sequentially

limit

patient,

RATE),

limits

may

any

value

limit.

the

alarm

to

the

STDBY

the

tone

before

will

be

press

and

turn

be

set

from

limits

position.

textured

while

unplugging

but

not

frorn a NELLCOR

that

has a slight

clinical

use

pressing

`

the

displayed.

and

hold

the

control

for

any

35

to

250

return

to

metal

surface

of

the

HIGH

the

knob

value

beats

the

default

it.

warble.

SAT,

appropriate

until

the

from

50%

to

per

of

the

AI

Pulse

Tone

Use

ot

Special

Features

ーー

When a NELLCOR

“peep”
and
saturation

status

When
beat
“beep”
accompanies
tone
instrument,

the

To

back

Alarm

The

lf
limits,

audio alarm

falling

and

the

is

also

“beep”

adjust

on

N-200

the

alarms

the

that

varies

as

it

decreases.

changes

allowing

N-200

signaled

heard

when a sensor-derived

an

is

significantly

be

sure

that

changes

the

volume

again,

the

Functions

has

both

activate

corresponding

will

sensor

in

pitch

while

prompt

is

receiving

by a high-pitched

ECG-derived

to

pulse

visible

sound

is

connected

to

reflect

This

watching

initiation

only

signal

higher

familiarize

pitch

of

the

pulse

tone

than

with

returns

and

because

(unless

the

alarm

or

patented

audible

indicator

to

changes

the

patient,

of

corrective

an

ECG-derived

tone

that

signal

is

NOT

any

“beep”

yourself

oxygen

tone,

turn

to

its

alarms

oxygen

will

until

it

has

the

N-200

in

oxygen

early

warning

notifying

actions

signal

has a slight

is

present.

related

that

with

the

difference

saturation.

the

control

defauit

saturation

that

flash,
been

turned

volume.

activate

the

and a patient,

saturation,

system
the

operator

(U.S.

(no

warble.

The

pitch

to

oxygen

reflects

knob.

level

or

appropriate

off).

rising

allows

Patent

sensor-derived

This

of

saturation.

oxygen

between

When

as

described

pulse

display

the

pulse

as

saturation

the

operator

of

changes

4,653,498).

signal),

tone

is

distinct

the

warbling

The

saturation.

the

ECG

.

the

N-200

below.

rate

moves

will

beat

is

to

in

the

from

tone

pitch

Before
warbling

is

turned

beyond

flash,

signaled

increases

monitor

patient's

each

pulse

any

that

of

the

warbling

using

tone

off

and

the

alarm

and

an

by

the

and

a

|

lf

the

alarms

displays

(unless

If

the

alarms

become

until

it

If

the

alarm

The

audio

disabled,

dy

will

or

until

blank,

has

been

alarm

and

activate

flash

zero,

it

has

activate

the

PULSE

turned

activates

function

its

volume

because

the

PULSE

been

turned

because

SEARCH

off).

because

can

can

the

pulse

SEARCH

off).

the

sensor

the

ECG

be

altered

be

adjusted.

signal

is

indicator

or

patient

indicator

signal

in

several

The

will

is

visible

lost,

the

module

flash,

lost,

the

ways:

alarm

OXYGEN

will

flash,

and

red

it

SATURATION

and

an

is

disconnected,

an

audio

ECG

LOST

can

be

temporarily

cannot

be

audio

alarm

the

alarm

will

indicator

silenced,

modified.

and

PULSE

will

displays

sound

will

(unless

flash.

it

sound

will

can

RATE

or

be

Default
are

two

Alarm

sets

Limits:

of

default

Default

alarm

alarm

limits,

one

limits

are

for

monitoring

in

effect

when

adults

the

and

N-200

one

for

is

turned

monitoring

on.

There

neonates.

high

low

high
low

To

determine

button
appears

To
of
be

Adjusting
the
or

When

Warning:

immediately

in

change

the

powerbase

operating

HIGH

to

the

left

the

Alarm

Limit

oxygen

oxygen

pulse

rate

pulse

rate

whether

the

OXYGEN

the

adult/neonatal

(DIP

on

AC power

the

Audio

SAT

and

to

decrease

N-200

Do

is

not

turned

set

saturation

saturation

the

default

after

turning

SATURATION

setting,

switch

Alarm

LOW

the

when

SAT

it.

off

alarm

1),

Volume:

buttons,

and

Adult

100%

85%

140

beats/minute

55

beats/minute

alarm

on

using a slender,

the

back

volume

limits

the

N-200.

display;

move

setting

To

and

on

are

if

the

is

changed

adjust

turn

again,

too

low

Setting

|

set

for

an

adult

the

instrument

if

it

is

set

for a neonate,

ADULT/NEONATAL

nonmetallic

the

audio

the

control

the

audio

to

be

for

that

alarm

knob

alarm

heard.

object.

Neonatal

95%

-

80%

200

100

or a neonate,

is

set

for

an

“95”

ALARM

Note:

The

change

volume,

to

to

the

right

returns

to

be

press

Setting

ㆍ

beats/minute
beats/minute

press

the

adult,

"100"

appears.

switch

implemented.

to

the

on

N-200

and

hold

increase

default

the

must

volume.

HIGH

both

the

SAT

back

volume

Temporarily

the

AUDIO

that

the

audio

if

the

alarm

To

change

ALARM

OFF

SATURATION

120

seconds.

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cable

to

the

Route

the

is

kinked.

to

any

the

Instrument

N-9000

recorder/

waveform

RATE

Recorder

provided

N-9000

fiber

optic

other

|

Recorder/Interface

interface

data.

switches

format

with

connector

(DIP

the

cable

instrument,

manual

The

N-9000

labeled

for

provides

readings

(DIP

switches

without

switch 7 down,

to

DATA

bends;

verify

the

are

3-5

the

other

-

an

ongoing

printed

down).

DATA

INPUT.

poor

ona

DIP

connector

Push

each

on

The

N-200

and

digital-output

A

general-purpose
record
event

©

The
voltage

of

memories.

N-200

range

VOLTAGE
50%

to

100%

may

oxygen

analog

required

switch.

display

also

be

connected

connectors.

strip-chart

saturation,

output

The

connectors

by

the

oxygen

using

to

the

Refer

to

the

Connecting

recorder

pulse

recorder

saturation

the

N-200

may

rate,

are

(0

Sa02%

pulse

NELLCOR

N-8000

Other

be

connected

waveform,

standard

to 1 volt

output

can

SCALE

27

N-8000

operator's

interface

manual

u

Strip-Chart

to

the

N-200

ECG

data,

3/32"

subminiature

or 0 to

10

be

set

switch.

volts)

for a 0

to

provide

for

full

instructions.

Recorders

to

provide a permanent

and/or

is

to

phone

set

with

100%

data

plugs.
the

display

additional

in

the

The

N-200

or

analog

trend

output

an

expanded

and

--

To

print

buttons

oxygen

to

generate

saturation and

zero

and

heart

rate,

full-scale

voltage

use

the

SAT

signals

and

in

order

RATE

to

connectors.

adjust

the

recorder

Use

the

ZERO

controls.

and

FULL

|

W

.

。

To

print

the

waveform,

full-scale

To
use

Note:
Improper

voltage.

The
contents
perfusion,

The

Service

It

may

voltage

print

trend

the

SAT,

Connect

loading

ThinkJet

of

ThinkJet

Department.

be

connected

pulse

use

the

data

RATE,

only a high

printer

the

trend

and

monitor

printer

(plethysmoqraphic)

ECG

IN/OUT

signals

at

on a strip-chart

and

PULSE

distorts

the

connector.

the

PULSE

recorder,

connectors.

impedance

correspondence

Connecting

with

an

RS-232

and

event

memories,

status.

and

necessary

to

the

N-200

as

waveform,

connector

device

the

Hewlett-Packard

serial

accessories

use

Use

the

in

use

the

(1 M ohm

between

interface

as

well

as

may

follows.

the

PULSE

ZERO

order

SAT

and

or

the

(model

to

record

be

ordered

ーー

connector:

and

FULL

to

adjust

RATE

higher)

measured

ThinkJet

22250)
ongoing

directly

to

buttons

the

recorder

connectors;

to

the

analog

voltage

Printer

may

be

used

saturation,

from

print

theECG

to

generate

controls.

to

print

output

and

the

to

print

pulse

zero

event

data,

connectors.

intended

rate,

output

the

pulse

Nelicor’ s Customer

and

"

]

00000]

1.

Set

2.

Set

up,

3.

Set

switches

4.

Set

5.

Connect

ThinkJet

6.

Provide

position

_

Note:

back

If

on-again

Caution:

institutional

Nellcor

the

N-200's

the

N-200

DIP

switch 5 down;

the

printer's

7-8

the

printer's

the

printer.

isolated
the

the

printer's

Provide

(model

baud

rate

format

using

MODE

down.

RS-232C

printer

paper

to

(Additional

power

to

start

switch

to

implement

the

ThinkJet

standards. A stand-alone

P-ISO).

to

19.2 K using

the

RS-232

or

to

another

SELECTION

switches:

the

N-200

cables

(if

appropriate),

printing

settings

those

changes.

printer

desired

switches:

DIP

using

are

near

are

changed

with

Isolation

the

BAUD

FORMAT

format).

DIP

switch 1 up,

the

interface

available

turn

the

on

top

from

the

of

while

isolated

transformer

RATE

switches

switches

DIP

switches

cable

provided

Nelicor.).

printer,

the

page.

it

is

turned

power,

switches

(DIP

(“Graphics

1-5

down,

2-4

by

verify

proper

on,

it

must

according

is

available

switches 7 and-8

Only”:

Nellcor

DIP

DIP

switch 6 up,

down,

DIP

with

operation,

be

turned

switches

switch 5 up.

and

to

from

|

the

off

up).

3-4

=

DIP

and

Lo

28

jaká

~"

4

då

emana

pe

nů

“ital

:

a

el

$

Serial

The
stop

Communication

RS-232

bit.

Setting

Identify
using

the

the

serial

communication

the

Baud

baud

rate

rear-panel

Rate

required

BAUD.

RATE

Connecting

Format

by

Baud

1200

2400

9600

19200

'

format

the

device

switches

Rate

of

Other

the

N-200

that

is

to

(DIP

switches 7 and

—

Position

_

Down
Down
Up

Up

Digital

is

eight

be

connected,

Switch

Devices

data

_

8

Down
Up
Down

Up

8).

bits,

and

no

parity

set

the

|

bit,

N-200

and

baud

one

rate

|

RS-232

©

The

following

corresponding

N-200

9-Pin

Connector

3
4

5
6
7

8

9

Pin

Assignments

table

pin

1

2

defines

assignments

the

Powerbase

—

Signal

Not

Used

Rx

Data

Tx.

Data

DTR

Sig

Ground
DSR
RTS

CS

Alarm

Out

pin

assignments

for a standard

__

on

the

25-pin

Direct

None

<--

-->

-->

<->

<--

-->

-->

rear-panel

RS-232

Output

—

SERIAL

connector.

Device

25-Pin

Connector

None

2
3
6

\

AW

20

25

COMM

connector

Output

Device

—

Signal

None

Tx

Data

Rx

Data

DSR

Signal
RTS

CTS

(Ignored

DTR

Not

Used

and

_

(Ignored

by

ThinkJet)

Ground

.

by

ThinkJet)

the

.

29

Ye

ツ
ーー

3]

Pin 8 (CTS)
connected),
temporarily

may

be

used

data

transmission

suspended.

to

control

takes

the

transmission

place.

When

of

data.

“FALSE”

When T RUE”

(negative

voitage),

(positive

voltage

data

transmission

or

not

is

3

{

j

é

(

Pin 9 may
volts)
state.
protected

Setting

>.

The

Format

—

Маше

Рой

Computer

Conversation

N-9000

be

when

This

against

the

RS-232

_

.

Recorder

used

there

pin

should

RS-232

FORMAT

to

connect

is

no

alarm

be

connected

transient

Communication

switches

the

N-200

state

and

voltages.

are

Full

readabie

or

printer

Single
plus

values

Request

Used

to

NELLCOR

to a remote

“TRUE”

to a high-impedance

Port

used

to

set

Description

strings

identifier

for

character

parameter

communicate

N-9000

alarm.

(greater

、

Format

the

communication

for

CRT

.

with

recorder/interface

The

than

4.0

circuit

output

volts)

(greater

is

when

port

XX

Down

Down

|

“FALSE”

thani K ohm)

format,

there

as

DIP

Posit

(less
is

follows.

Switch

4.

Down

Down

Down

Up

Up Up

Down

an

and

than

alarm

|

dA.

Up

Down

Down

0.3

3

4

Beat

to

Beat

No

Real-Time

Graphics

Full

Format:

lines

appears:

HH:MM:SS:

or

HHHMM:SS:

Only

Output

This

format

MONITOR:

MONITOR:

Outputs
once

Supresses

output;

will

be

Supresses

and
trend

output

is

designed

RATE = nm

NO

PULSE

rate

and

per

beat:

real-time

trend

and

output

sign-on

real-time

and

event

if

connected

for

printer

DATA

saturation

data

event

data

if

connected

message

data

output;

data

will

or

CRT

%SAT = nnn

30

be

output.

PULSE

Up

Up

Up

Once a minute,

AMPL.

%FS=nnn

Down

Down

Up

one

of

Up

Down

the

following

Additionally,

again,

variable

along

has

if
with
changed):

alarm

the

status,

following

monitor

status,

(also,

an

asterisk

or

limits

change,

[*] is

printed

one

in

of

the

front

preceding

of

the

line

lines

to

identify

will

which

appear

MONITOR

„ALARMS

LIMITS:

For

MONITOR

If

the

N-200

transmitted

Computer
are

transmitted:

immediately

HH:MM:SS:

Format:

(02)

STXRnnnSnnnPnnnLnnnHnnnOnnnAnnnMnnnTnnnnnnQnnnCHLFCHKSME

S = Saturation

T = Time

A = Heart

n = ASCII

© P >

L = Low
H = High

O = Low

Q = High

A = Alarm

M = Monitor

STATUS: | NORMAL

ACTIVE:

STATUS

is

turned

off

or

the

and

again

COMMUNICATIONS

Once

every

'

|

%

hhmmss

Rate

character,

Pulse

Amplitude

Rate

Alarm

Rate

Alarm

Saturation

Saturation

“Bit 0 =

Bit 1 =

Bit 2 =

Bit 3 =

i.8.,

Bit 0 =
Bit 1 =
Bit 2 =
Bit 3 =
Bit 7 =

i.8.,

ASCII

enabled,

Status

ASCII

Sensor
Audio

Communications

in

High

Rate

Low

Rate

Low

Sat

High

Sat

005 = 01018 = low

Status

Pulse

Search

Status

Alarm

ECG

Status

015 = 000011118 = Locked

and

ECG

or

(SEARCH,

DISABLED)

NONE

LOW

or

(LOW

SATURATION,

RATE=

or

ALARMS

powerbase

once

ten

normally a number
(current

Limit

Limit

Alarm

Alarm

Bits 1 =

Status

Status

off

nnn

ACTIVE,

is

each

WITH

seconds,

Limit

Limit

MONITOR

sample)

|

in

alarm

with

Monitor

OXISENSOR

HIGH

only

detached

minute:

and

when

|

condition

sat

and

|

Lost

RATE=

abnormal

from

LOST

the

high

rate

'

on

pulse,

OFF,

HIGH

SATURATION,

nnn

LOW

indications

the

monitor,

status

ーー

alarms

1 = Locked
1 = Attached
1 = Enabled
1=
1 = Lost

sensor

ECG

SAT=nnn

the

or

limits

Off

attached,

|

LEADS

change,

OFF,

LOW

are

given.

following

0 = Search
0 = Off
0 = Disabied
0 = On

0 = Intact

audio

AUDIO

RATE,

HIGH

sequence

the

following

(03)

TX

alarms

HIGH

SAT=

ALARM

RATE)

nnn

is

data

|

31

i

01

cinesi

al

CRLF = Carriage

CHKSM = 1

Conversation

output

the
heart

©

The

N-9000
recorder/interface.

Beat

following

Ne

Real-Time

pulse

sign-on

is a single

rate

by

sending

Conversation

Recorder

to

Beat

Format:

format:

RnnnSnnnCRLF

rate

data.

message

Format:

parameter,

an

format

Format:

Output

Trend

from

Return

Byte

Checksum

This

mode

“R.”

The

is

available

This

This

mode

Format:

and

event

the

powerbase

and

Line

uses

the

by

request

interface

for

all

mode

is

|

transmits

In

this

mode

data

are

is

printed

Feed

same

character

only.

For

responds

parameters

used

to

communicate

saturation

there

is

transmitted

when

definitions

example,

with

“Rnnn*

listed

and

pulse

no

output

to

an

output

AC power

the

computer

(nnn

in

the

with

rate

of

real-time

device,

is

first

as

Computer

is

the

Computer

the

NELLCOR

data

once

saturation

if

connected.

requests

heart

rate).

format.

N-9000

per

one

is

connected.

format,

the

-

beat

and

but

current

in

the

The

Graphics

-

real-time

if

one

is

Only

Format:

saturation

connected:

and

In

this

pulse

mode

rate

the

data.

sign-on

Trend

message

and

event

is

data

supressed

are

transmitted

and

there

to

an

is

no

output

output

of

device,

32

This

section
resolving
personnel

800

351-9754

discusses

them.

or

call

(CA).

some

If

the

difficulty

Nellcor's

V.

TROUBLESHOOTING

potential

persists

Technical

difficulties,

after

Service e Department

their

following

possible

these

GUIDE

causes,

suggestions,

at

800

433-1244

and

suggestions

contact

(U.S.)

for

qualified

or

service

Sed

si”

Warning:

inside.

1.

The

instrument

+

AC
problem

qualified

2.

The

instrument

The

battery.

The

service

The

Nellcor's

3.

The

instrument

The

Shock

Contact

power

persists,

service

battery

battery

personnel

battery

Technical

powerbase

hazard.

qualified

cannot

is

not

Do

service

be

connected

check

personnel

operates

may

be

discharged. Fourteen

pack

may

or

charger

Services

operates

may

not

remove

personnel.

turned

on:AC

be

Nellcor's

circuit

on.

and

the

AC

or

Nellcor's

power

defective

Technical

may

Department.

on

AC

power

be

disconnected

cover.

the

battery

fusa.

If

but

or

the

be

defective.

but

from

There

is

discharged.

this

does

not

Technical

not

on

the

hours

are

battery

Service

the

fuse

Department.

Contact

BATT

the

monitor.

are

no

resolve

Service

battery.

required

may

qualified

IN

USE

user-serviceable

Connect

the

problem,

to

AC

power.

contact

Department.

to

completely

be

open.

indicator

Contact

service

is

always

personnel

parts

If

the

recharge

qualified

or

on.

the

The

instrument

wi

4.

aos

not

connected,

the

connections,

The

AC

type

The

instrument

“Err

1"

Nellcors

“Err

2”

or

Nellcor's

“Err

3"

to-digital

fuse

and

indicates a damaged

Technical

indicates a damaged

indicates a damaged

converter.

may

or

on

the

rating.

displays

Technical

not

it

is

connected

or

try

rear

an

Service

Service

Contact

be

receiving

another

panel

error

message

RAM

Department.

ROM

display

qualified

AC

power

to a defective

AC

outlet.

may

be

defective.

and

(data

memory).

(program

Department.

or

indicator,

service

because

AC

outlet.

—

Replace

then

turns

Contact

memory).

or

possibly a malfunction

personnel

the

power

Replace

the

fuse

itself

off

qualified

Contact

or

Nellcor's

cord

is

the

power

with

one

after

five

minutes.

service

qualified

service

Technical

defective,

cord,

check

of

the

same

personnel

personnel

of

an

analog-

Service

it

is

or

Dept.

33

μμ

csi

i

0000

Note:

The

instrument

However,

the

Caution:

if

the

cannot

“Err

because

display

Continue

defective

be

4”

indicates

procedure.

“Err

5"

indicates

service

Note:

“Err
event
normally

the

assembly
Service

personnel

The

instrument

6”

indicates

memories

as

trend

and

U15

Department.

will

at

least

or

warning

identified, do

Turn

indicators

to

use

segment(s)

that

the

the

ON/STDBY

jumpers

or

Nellcor's

will

that

battery-backed

were

erased

long

as

the

N-200

event

memories

needs

to

operate

one

the

has

not

continue

N-200

W1

and

Technical

operate

and

is

will

be

replaced.

if

any

button

numeric

may

display

be

incorrect.

instrument

been

identified.

to

use

lost

power

switch

W4

without going

to

STDBY

were

not

Service

if

any

button

memory

reinitialized.

turned

be

erased.

on,

Contact

is

pressed

segment

only

in

an

If a defective

the

N-200.

and

installed

Department.

is

pressed

contents

The

trend

but

when

This

message

qualified

while

or

indicator

urgent

through

back

to

properly.

while

have

been

and

the

ON/STDBY

may

service

“Err

3”

is

may

situation

segment

the

normal

ON.

Contact

*

“Err

5”

is

lost,

and

event

memories

switch

indicate

personnel

showing.

be

missing,

and

only

shut-down

qualified

displayed.

the

trend

will

operate

is

set

to

that

the

RAM

or

Nellcor's

and

STDBY,

socket

Technical

©

eee

Note:

This

monitor

“ALL

N-200

can

further
corrupted

Note:
trend

“Err

EPROM

clr”

indicates

erases

also

be

action

If

the

graph

Pb”

indicates

powerbase
message
Service

Note:

does

Department.

The

message

manually

is

and

N-200

indicating

is

plugged

instrument

may

also

has

been

replaced

that

the

trend

and

reinitializes

cleared

necessary.

erased, a simultaneous

erases

that

not

disappear,

the

that

the

powerbase

in

and

will

operate

(When

the

appear

briefly

with a different

and event

the

memories

and

reinitialized.

“ALL

clr”

5-second

trend

and

event

oldest

the

contact

portion

is

not

monitor

qualified

if

any

button

when

the

N-200

version.

memories

if

the

In

appears

data

both

because

alarm

were

have

cases,

sounds.)

memories, a message

of

the

memory

communicating

is

correctly

installed

service

is

pressed

personnel

is

No

erased

been

the

the

was

with

on

while

first

turned

action

is

required.

and

reinitialized.

corrupted.

“ALL

clr’

memory

header

erased.

the

monitor.

the

powerbase.

or

Nelicor’s

“Err

Pb”

is

on

after

the

The

The

memories

appears.

data

No

were

appears

Check

If

the

that

Technical

displayed.

on

the

the

bis

ideal

όρους

の
ae

34

.

The

perfusion

saturation

*

The
and

・

The

pulse.
instrument

OXISENSOR

*

The

The
not

Nellcor’s

module
is

not

.

The

pulse

display.

*

The

indicator

and

pulse

sensor
correct

patient’s

may
if

Check

on

sensor

patient

possible

may

module

or

Technical

from a NELLCOR

being

used

amplitude

sensor

may

is

not

rate

are

be

improperly

necessary.

perfusion

the

yourself

may

condition

or

R-15.

be

damaged.

may

it

does

not

Service

or

if

the

indicator

be

damaged.

tracking

not

the

displayed.

applied

be

too

poor

of

the

patient;

another

be

resolve

patient;

Replace

damaged.

the

Department.

N-100

ECG

pulse

signal

is

tracks a pulse,

Replace

pulse

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to

the

patient

for

the

instrument

use

C-LOCK

try

another

it

with

another

If

possible,

problem,

contact

Note: A model

oximeter

being

provided

but

there

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with

another

try

may

SEARCH

or

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ECG

sensor

sensor.

another

qualified

C-13

be

used

via

is

no

oxygen

sensor.

not

to

detect

indicator

be

is

on),

plugged

an

acceptable

synchronization;

site; or

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try

the

module.

service

C/D

if

C-LOCK

rear-panel & connector.

saturation

or

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personnel

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or

and

oxygen

in.

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test

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or

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synchronization

pulse

rate

.

e

*

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input

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module

or a C-200-20

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perfusion

rate

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the

patient;

another

patient

pattern.

3.

cannot

type

required

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than

use

patient;

motion

Use

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of

patient

patient

or

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to

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or

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be

making

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connected

module

module

is

being

provided

to

allow

the

instrument

bars

on

the

perfusion

ECG

synchronization;

OXISENSOR

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impossible

R-15.

synchronization.

to

the

instrument.

may

be

in

use.

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via

C/D

the

rear-panel

to

measure

display).

test

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for

the

instrument

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or

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patient

connector).

saturation

Check

instrument

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to

the

on

find

set

13

module

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patient

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34A

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connector

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plug

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erratic.

pins

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pulse

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displays

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them

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disassemble

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and

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the

pulse

patient

amplitude

module.

indicator

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pattern.
sensor
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electrocautery

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directly

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sensor

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:

instrument

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Check

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move

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ECG

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close

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.

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connections.

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material.

LOST

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ECG

the

condition

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D-25

insulation

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of

the

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adult

digit

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patient.

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electrodes

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transducer

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sensor

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to

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rear-panel

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35

may

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or

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amplitude

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of

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output

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patient

contact

input

signal

or

defib

power

to

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module

qualified

service

from

sync

the

monitor

gain

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the

ECG

pulse

may

of

the

ECG

be

defective.

personnel

monitor

wave;

have

monitor.

Try

or

Nelicor's

may

been

interrupted:

another

Technical

be

incorrect;

patient

use

module.

Service

60

dB

ECG

If

that

is

not

Department.

analog

possible,

Quad

10.

11.

When

Check

_

The
instrument

|

The

pulse

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pattern.

sensor
move

-

or

The
ment

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present

the

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is

connected,

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the

set

the

patient

to

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manual

electrocautery

perfusion

on

yourself

rate

that

patient

If

possible,

is

securely

sensor

N-200

may.

double.

ECG

on

the

for

the

puise

the

sensor

is

displayed

motion

ask

applied

to a new

for

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have a pronounced

Try

another

synchronization

ECG

monitor.

that

monitor.

unit

is

may

or

another

may

the

and

site;

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may

properly

bé

by

be

patient

sensor

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be

interfering.

rate

is

displayed

applied

inadequate.

patient;

the

N-200

making

to

replace

use a type

is

in

try

does

it

remain

it

if

necessary;

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dicrotic

site.

use,

an

ECG

leads

Refer

but

saturation

and

connected.

Check

impossible

the

an

OXISENSOR

not

correlate

still.

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sensor

notch,

artifact

that

which

or

to

improve

to

the

is

status

of

the

R-15.

with

for

the

instrument

check

use

C-LOCK

tolerates

causes

poor

quality

quality

discussion

not.

patient;

that

of

whether

ECG

more

patient

the

pulse

signal

of

ECG

under

test

the

an

ECG

monitor.

to

find a pulse

the

synchronization;

motion;

rate

measure-

may

be

signal.

Item

Refer

8.

|

to

Ls

Bol

‘

12.

Y,

The

N-200

from a blood

The

ture,

oxygen

calculation

PaCO2,

appropriately

sion

in

the

saturation

saturation

gas

determination.

may

2,3-DPG,

corrected

“Principles

values

are

measurement

not

have

or

fetal

for

of

Operation”

not

reliable

been

correctly

hemoglobin.

relevant

variables.

section

as

does

direct

CO-Oximeter

not

correlate

adjusted

Check

(For

of

this

manual.)

with

for

the

effects

whether

more

calculations

information,

In

measurements.

the

value

of

see

general,

calculated

pH,

tempera-

have

been

the

discus-

calculated

36

13.

・

Accuracy

dysfunctional

ment,

venous

extremity
Observe
directions

The

N-200

laboratory

*

Fractional

the

meters,

CO-Oximeter

ments

to

*

Close
obtained

oxygen

CO-Oximeter.

comparison

measure

must

make

correlation

can

be

affected

hemoglobins,

pulsations,

that

has a blood

ail

instructions,

for

use.

saturation

measurements

was

made.

functional

and

Corning

be

converted

this

conversion

requires

simultaneously

by

incorrect

sensor

intravascular

electrosurgical

pressure

warnings,

measurement

may

The

saturation.

oximeters,

to

functional

may

be

that

from

and

not

have

NELLCOR

found

the

blood

the

same

cuff,

measure

measurements
in

application

dyes,

bright

light,

interference,
arterial

cautions

does

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Multi-wavelength

the

sampling

arterial

catheter,

in

this

not

correlate

converted

N-200,

as

fractional

“Principles

and

supply.

well

or

use,

excessive

and

placement

or

intravascular

manual

with a value

to

functional

as

other

oximeters,

saturation.

for

comparison.

of

Operation”

puise

oximeter

significant

patient

of a sensor

line.

and

in

the

sensor

measured

measurements

two-wavelength

such

as

Fractional

The

section

measurement

levels

of

move-

on

by

the

1.282

measure-

equation

of

this

an

a

before

oximeters,

used
manual.

be

14.

15.

16.

The

OXYGEN

ㆍ

Excessive

or

disconnected

・

The

‚

lf

the

dislodged

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and

*

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Technical

ㆍ

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Trend

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or

The

switch

ㆍ

The

SATURATION

patient

ECG

cable

ECG

from

event

memory

Service

data

in

avent

N-200

settings

cables

from

may

signal

the

data

battery

the

trend

data

BAUD

may

may

be

display

motion

is

are

the

have

coming

ECG

not

may

may
ECG

come

from

IN/OUT

available.

be

Department.

and

event

cannot

RATE

be

printed.

switch

be

incorrect.

improperly

is

erratic

have

caused

cable.

Check

loose

an

ECG

from

connector

discharged.

memories

settings

Check

connected.

and

the

the

the

monitor,

on

the

Contact

may

or

the

printer

them.

Check

the

ECG

ECG

electrodes

electrodes

patient

have

module

the

input

back

of

qualified

been

MODE

them.

LOST

display

to

and

check

connector.

cable

the

N-200.

service

erased.

SELECTION

is

flashing.

become

the

connections.

Check

may

have

Check

personnel

displaced,

the

become

the

connection.

or

Nellcor's

or

RS-232C

dislodged,

connection.

17.

The

・

NELLCOR

The

N-200

N-9000

BAUD

recorder/interface

RATE

or

RS-232

FORMAT

or

37

NELLCOR

switch

N-8000

settings

interface

may

cannot

be

incorrect.

be

used.

Check

them.

The

NELLCOR

both

oxygen

The

instrument

consists

monitor
low-voltage,
light

(approximately

of

an

that

receiver.

N-200

saturation

combines

electro-optical

processes

low-intensity

One

920

provides

of

functional

the

and displays

light

LED

emits

nm).

VI.

PRINCIPLES

continuous,

hemoglobin

principles

sensor

that

the

emitting

red

light

non-invasive,

and

pulse

of

spectrophotometric

is

applied

measurements.

diodes

(approximately

to

(LEDs)

the

OF

OPERATION

automatically

rate.

oximetry

patient

The

electro-optical

as

light

sources

660

nm)

and

calibrated

and

and a microprocessor-based

and

one

the

other

measurements

plethysmography.

sensor

contains

photodiode

emits

infrared

as

light

of

It

two

a

When
both
diode
measurement

With
hemoglobin
that

normally

measurement
when
wavelengths

The
light

the

light

the

red

in

the

each

heart

it

absorbs.

measurements

Initially,

ment

light

indicates

does

the

pulsatile

NELLCOR

absorbed

wavelength

C-LOCK

ECG
ments.

when

ECG

signal

This

the

patient's

from

the

LEDs

is

transmitted

and

infrared

sensor

is

used

beat, a pulse

differs

The

to

determine

absorption

the

not

change

of a spectrophotometer.

is

changed

N-200

during

is

then

light

measures

to

determine

from

deoxygenated

N-200

is

amount

blood

enters

by

then

the

initial

used

to

is

absorbed

the

of

oxygenated

measures

the

percentage

determined

of

light

substantially

the

the

presence

corrects

measurements.

determine

Synchronization:

as a reference

enhances

perfusion

point

the

performance

is

poor,

light

that

how

much

hemoglobin

absorption

when

absorbed

during

Absorption

tissue.

the

measurements

functional

C-LOCK

for

identifying

of

as

discussed

through

by

the

passes

red

arterial

of

the
by

the

In

that

of

the

ECG

the

instrument

the

blood

blood

and

by

through

light

blood

in

of

both

functional

pulsatile

tissue

pulse.

is

measurement,

puise

The

ratio

oxygen

without

and

infrared

flows

the

relative

red

and

hemogiobin

blood

and

nonpulsatile

This

then.measured

of

arterial

during

of

the

saturation.

synchronization

the

pulse

and

in

the

below.

and

tissue

each

to

the

amount

infrared

is

not

is

analogous

the

blood.

the

puisatile

corrected

components, a portion

tissue

being

absorbed,

light

was

sensor

of

light

that

is

present.

blood,

following

light

absorption

absorption

enables

synchronizing

presence

of

component.

and

absorbed.

site.

This

red

and

infrared

and

uses

saturated

This

measure-

absorption

to

the

reference

the

next

flow

for

the

the

N-200

saturation

patient

movement

The

photo-
this
_

oxygenated

light

those

with

oxygen.

that

heartbeat,

at

both

amount

at

each

to

use

an

measure-

of

of

and

X

M

πε

When
cardiac

ECG

length

sensor.
ECG

nonsynchronized

the

N-200

activity:

R-wave

of

this

is

delay

However,

synchronization,

is

provided

an

optical

detected,

varies

for a given

the

artifacts

with

signal

an

optical

with

the

patient,

N-200

(e.g.,

ECG

from

the

pulse

patient's

the

uses

random

input,

sensor

will

physiology,

length

that

time

motion).

it

is

receiving

and

an

be

detected

the

of

the

delay

relationship

3

8

two

separate

electrical

at

heart

to

signal

the

sensor

rate,

is

relatively

identify

signals

from

the

site a short

and

the

location

stable.

“good”

pulses

that

reflect

ECG.

time

of

Through

and

When

later.

the

C-LOCK

reject

an

The

Fete

eel
à

if

the

N-200
extent
determine

C-LOCK

that

is

not

provided

it

can

no

pulse

rate

ECG

synchronization

longer

and

initiate

with

be

used

resumes

an

ECG

signal,

by

the

saturation

when

or

if

that

instrument,

measurements,

an

then

adequate

electrical

the
if
ECG

optical

that

optical

signal

signal

deteriorates

pulse

alone

signal

again

is

is

being

to

such

is

used

to

available.

tracked.

an

o.

ln

ms

Automatic

N-200
manufactured:

calibration

‘determine

sensor.

The

N-200

and

when a new

automatically

Functional

saturation,

fractional

Functional
hemoglobin
measure

In

contrast,
oxygen
percentage
oxygen

Calibration:

pulse

resistor,

the

is

vs.

it

oxygen

oxygen

saturation,

some

saturation

of

transport.

oximetry

the

system

effective

and

then

calibration

automatically

sensor

to

compensate

Fractional

may produce

saturation.

that

is

all

hemoglobin

is

saturation

capable

it

measures

other

laboratory

values.

Measured

Patented

mean

coefficients

calibrated

connected.

Saturation:

automatic

(U.S.

Patent

wavelength

checked.

for

differences

That

that

each

Also,

Because

measurements

is

defined

of

transporting

only

oxygenated

instruments,

Fractional

that

dysfunctional

saturation

is

measured,

calibration

4,621,643).

of

calibration

should

time

it

the

in

tissue

that

differ

as

oxygenated

oxygen.

such
is

whether

hemogiobins

mechanisms

Each

the

LED

resistor

be

used

is

turned

intensity

the

and

defined

of

thickness.

N-200

from

those

hemoglobin

Because

deoxygenated

as

the

or

are

sensor

is

determined,

is

read

for

the

measurements

on,

at

periodic

the

LEDs

measures

of

instruments

the

N-200

|L282

as

not

CO-Oximeter,

oxygenated

that

included

are

incorporated

is

calibrated

coded

by

the

N-200

intervals

in

the

sensor

functional

expressed

uses

two

(i.e.,

functional)

hemoglobin

hemoglobin

in

this

calculation.

into

the

when

it

is

into

a

software

obtained

ーー

thereafter,

are

-

oxygen

that

measure

as a percentage

wavelengths

hemoglobin.

report

expressed

is

available

to

by

that

adjusted

fractional

for

of

to

the

as

a

m

L

lime

n

Consequently,
instrument,

fractional
may

be

converted

functional
Saturation = fractional

when

it

is

important

saturation.

to

measurements

to

consider

If

the

other

instrument

functional

saturation,

saturation

from

the

whether

measures

using

x

N-200

that

other

the

100 - (%

39

are

compared

instrument

fractional

following

carboxyhemogiobin + “e

with

is

measuring

saturation,

equation:

100

those

from

another

functional

those

measurements

methemoglobin)

or

.

L

Measured

|

i

i

; :

7

1

„4

PaO2,
is

because

sarily
and

saturation.

of

fetal

vs.

the

calculated

an

been

correctly

hemoglobin.

Calculated

value

oxygen

These

saturation

adjusted

variables

The

Saturation:

may

differ

value

for

the

include

effects

of

1007

.

ο

G

ーー

の

50

5

When

from

that

effects

temperature,

these

bon

р

e)

t

+

PCO:

1

240PG

oxygen

the

oxygen

has

been

of

variables

variabies

7

L

PaO,

saturation

saturation

calculated

that

pH,

PaCO2,

are

indicated

.

{ia

Temperature

4

PCO:

4

230Pa

(mmHg)

15

calculated

measurement

from

shift

the

2,3-DPG,

below.

~

from

of

blood

gas

PaO2

relationship

=

cem

and

between

the

87

blood

gas

the

N-200.
has

concentration

This

not

PaO2

neces-

mt
ğ

40

00

tree

seed

Ritch

©

Gestes

pad

Notify

the

carrier

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1

NELLCOR

1

patient

power

ECG

three-lead

ECG

ECG

2

Operator's

1

assortment

Vil.

immediately

and

its

accessories.

N-200

module

cord,

120

patch

cord

ECG

lead

wire

electrodes

Manuals

pack

UNPACKING

if

the
Confirm

pulse

oximeter,

(model

cable

sat

C-200-13; 4 meters/13

VAC

U-ground

(optional)

|,

of

OX/SENSOR

N-200

that

hospital

AND

shipping

the

following

including

plug

oxygen

transducers

CHECKING

carton

monitor

is

are

and

feet)

damaged.

included:

powerbase

THE

Carefully

N-200

(120

unpack

volts)

the

Aço

sus

Inspect

Service

Test

lf a difficulty

contact

If

and

all

it

is

necessary

wrap

each

Department

functions

occurs,

qualified

each

component.

at

800

of

the

refer

service

to

repack

separately.

If

any

433-1244

N-200

as

to

the

personnel

and

ship

Pack

component

described

“Troubleshooting

or

the

the

instrument

is

missing

(U.S.)

or

in

the

Nellcor's

N-200,

800

Technical

disconnect

and

or

damaged,

351-9754

“Operating

Guide.”

If

that

Service

the

its

accessories

contact

(CA).

the

N-200”

does

Department.

patient

in

Nellcor's

section

not

resolve

module,

the

original

Customer

of

this

the

difficulty,

unplug

shipping

manual.

i

the

sensor,

carton.

41

The

NELLCOR

by

the

operator's
difficulties,
instructions,
pulse

If

necessary,

800

351-9754

To

respond

and

powerbase

OFF
code
base
the

control

will

appear

their

including

oximeter

to

buttons,

will

appear

is

connected

knob

in

N-200

institution.

possible

preventative

service

Nellcor's

(CA).

questions,

software.

and

tum

in

the

to

the

to

the

the

PULSE

VII.

pulse

oximeter

The

causes,

manual.

Technical

the

Technical

To

find

the

control

PULSE

left

RATE

monitor,

until

“Pb”

RATE

SERVICE

requires

“Troubleshooting

and

suggestions

maintenance

Service

Service

the

monitor

knob

until

display.

again

press

appears

display.

no

Department

Department

version

“0”

appears

To

the

in

the

AND

routine

Guide”

for

resolving

checks,

may

code,

find

the

HIGH

OXYGEN

MAINTENANCE

service

in

are

be

in

the

powerbase

SAT

other

this

manual

them.

contained

reached

may

nesd

press

the

OXYGEN

and

AUDIO

SATURATION

than

discusses

Complete

in

at

the

HIGH

version

that

which

service

the

NELLCOR

800

435

1244

version

SAT

SATURATION

ALARM

code

and

code,

OFF

display;

is

mandated

potential

N-200

(U.S.

of

the

AUDIO

display;

when

the

buttons,

the

version

jo

monitor

ALARM

the

power-

and

code

turn

Warning:

disassembly

-

do

not

attempt

do

so.

Caution:

servicing

Warning:

the

same

clean

To

cleaning

Do

.

damage

If

it

and

the

solution

not

immerse

the

is

necessary

wrap

each

The

N-200

will

to

For

continued

type

and

surfaces

housing.

separately.

contains

expose

disassemble

To

reduce

to

qualified

rating.

of

the

such

as

the

instrument

to

retum

no

user-serviceable

hazardous

the

or

service

risk

voltages.

of

electric

personnel.

protection against

N-200

Fantastic®

the

Pack

or

its

N-200

the

and

its

accessories,

or

Formula

accessories.

to

Nellcor,

N-200

and

To

avoid

the

instrument

shock,

fire,

replace

409®

Do

disconnect

its

accessories

parts.

injury

do

use

not

use

the

Removing

or

unless

not

remove

the

fuse

70%

isopropyl

caustic

patient

in

the

the

covers

instrument

you

are

qualified

cover.

only

with

alcohol

or

abrasive

module,

original

unplug

carton.

or

damage,

to

Refer

one

of

or a commercial

cleaners

the

sensor,

that

will

ee

42

pi

IX.

SPECIFICATIONS

Configuration

nisa

i

o

À

0

te

i

i

à

al

Components:

Readout:

Controls:

Range:

Monitor
cord.

Two
Red

Red
HIGH
Yellow

Control
alarms

Rear-panel
output

unit

three-digit
16-segment

LED

RATE,

LED

knob

and

range

50%-100%,

data,

printing

_

Saturation

Pulse

Rate

with

detachable

red

LED

LED

display

annunciators

and

LOW

for

RATE

annunciators

to

adjust

volume

disable

switches

RS-232

Range

Range

audio

for

(0-1 V or

format,

event

data,

=
=

0-10

powerbase,

displays

LOW

for

alarm.

adult/neonatai

analog

for

for

pulse

BATT,
alarms,
BATT

and

set

V),

analog

baud

rate;

full

oxygen

PULSE

ECG

IN

USE

scale

Performance

0-100%
20-250

beats

per

patient

amplitude

module,

saturation

SEARCH,

LOST,

alarms,

alarm

saturation

and

and

ECG

and

settings,

rear-panel

output,

minute

hospital-grade

and

indicator

HIGH

AUDIO

IN

USE.

five

buttons

analog

output

scale

buttons

and

analog

」

puise

(pulse

SAT,

ALARM

to

voltage

(0-100%

for

printing

zero

power

rate.

amplitude).

LOW

SAT,

OFF.

select

or

trend

output.

ous

Accuracy:.

Sensor:

Saturation:
(9%%SaO2.

Neonates:

Heart

(See

Type:

+1SD)

Rate:

the

“Qualifying

|

Wavelengths:

Heating:

Tissue

Range:

|

70%-100%:

50%-70%:

0-50%:

70%-95%:

_

+2bpm:

Information”

Compatible

OXIBAND,

660

nm

(red,

Power

dissipation

OX/SENSOR

between

D-25

and

dissipation

and

|-20

_

section

with

NELLCOR

and

DURASENSOR

nominal),

by

LEDs

oxygen

LED

and

N-25,

and

sensors.

+ 2 digits
+3

digits.

unspecified
£3

digits

=1

digit

of

these

specifications.)

sensors

oxygen

920

nm

sensor;

detector

.

less

than

(typically

less

transducers:

is

approximately

approximately

-

including

transducers

(infrared,

than

nominal)

50

milliwatts

1°C

typical

3-12

tissue

mm

temperature

5-20

for

OXISENSOR

-

total

heat

thickness

mm

for

the

D-20

，

rise)

the

.

43

OXIBAND
thickness

5-20

тт.

oxygen

between

_

transducer,

LED

and

detector

model

OXI-200N:

is

approximately

typical

tissue

.

아이

Alarms:

Audio

and

rate;

loss

briefly
disabled
can

permanent

The

for

be

changed

initial

are,

Adult

Mode:

High
Low

High

Low

Neonatal

High

Low

High

Low

DURASENSOR
tissue

8-13

visual

alarms

of

pulse,

detected

for a 60-second

disable)

default

Sat:

Sat:

Rate:

Rate:

Mode:

Sat:

Sat: - 80%

Rate:

Rate:

visual

pulses

to

30-120.

with

alarm

100%

85%

140

55

95%

200

100bpm

thickness

mm.

for

high

and

alarm

for

and

the

period

associated

settings

bpm

bpm

bpm

with

seconds,

that

-

|

oo

(adjustable

(adjustable
tadjustable

(adjustable

(adjustable

(adjustable

(adjustable

(adjustable

oxygen
between

low

loss

of

volume

the

or

the

visual

are

transducer,

LED

oxygen

ECG.

Audio

is

adjustable.

AUDIO

in

ALARM

disable

warning.

effect

50-100)
50-100)

35-250)

35-250)

50-100)

50-100)

35-250)

35-250)

model

and.detector

saturation,

alarms

Audio

OFF

timer

can

when

the

N-200

|

DS-100A:

is

approximately

high

and

are

interrupted

alarms

button;

be

turned

leaves

typical

low

pulse

can

be

disable

off

(for

Nellcor

|

period

|

A
La

Audio

Modes:

Pulse:

To

select

High

.

When a sensor-derived

pulse;

saturation.

When

each

proportional-to

Three

buttons.

different

and

low

alarm

volume

ONLY

an

detected

response

Mode
Mode
Mode

1:

2:

3:

default

is

adjustable

ECG-derived

pulse;

oxygen

modes,

normal
fast
slow

alarm

limits

cannot

signal

with

|

volume

saturation.

selected

response

response

response

44

limits

refer

overlap.

is

present,

control

signal

is

is

adjustable

by

the

(5-7

seconds)

(2-3

seconds).

(10-15

seconds,

to

the

N-200

an

audio

knob;

pitch

present, a higher-pitched

with

the

:

contro!

knob

puise

Service

beep

sounds

is

proportional.to

control

and

rate

knob;

LOW

is

not

Manual.

with

beep
pitch

RATE/HIGH

indicated)

each

oxygen

sounds

is

NOT

|

detected

with

RATE

ECG:

Direct:

Via

patient

module

CMRR:

Data

Output:

Indirect:

>100

dB

Optical:

Input:

Bandwidth:

Input

Range:

Input
impedance:

Via

ECG

in/out

Input:

|

Input

Range:

at

60

Hz

with 5 k

Fiber

optic

Baud

rate:

Data

format:

recorder/interfacs

Defibrillator
Lead

ο

0.5.-

40

0.5 - 2.0

>10 M ohms

analog

jack

Defib

monitor.

positive

0.5 - 15.0

Minimum

amplitude

ohm

source

transmitter

24

00

compatible

and

protected,

Il

limb

configuration

Hz.

mV

for

Sync

or

ECG

For

optimum

deflection

У

of

10

imbalance

with

NELLCOR

NELLCOR

differential,

QRS

detection

out

waveform

performance,

recommended.

milliseconds

N-9000

N-8000

interface

wide

standard

from

bedside

waveform

at

50%

of

È

ECG

with

peak

ee

Analog:

4

each;

3/32"

Outputs:

Voltage:

Scale

Set:

Range

Accuracy:

Set:

phone

jacks

Sao.

Pulse

Pulse

-

ECG

wave

0-1

Vor

pushbuttons

scale

SaQ2

SaO2

+

20

mV

referred

45

|

Rate

Wave

out

or

ECG

0-10 V (switch

provided

voltage

0-100%

50%-100%

at

zero, + 0.5%

to

front-panel

wave/defib

selectable)

for 0 volts

(DIP

switch

(F.S.),

display

sync

in

and

full

|

selectable)

~."

Digital:

Type:

RS-232C

Input/Output:

1)

DIP

switches

8

each

2

each

2)

Pushbuttons - 4
(momentary

Connector:

Baud

Rate:

Formats:

|

for

digital

for

analog

action)

9-pin

DIP

switch

1200,

1.

N-9000

2.

Full

3.

Computer

4,

Conversation

5.

Beat

6.

No

7.

Graphics

Waveform

mode

output/alarm

scale/analog

each

analog
analog

TREND

EVENT

“D”-type

2400,

Real-Time

sub-mini

selectable

9600,

Recorder

to

Beat

Only

data

set

output

ZERO

FULL

voltage

scale

(female)

from

19.2

K

Output

are

available

range

in

N-9000

UL

E

Beet

TY

mě

DIP

Switch

„78

3,4,5

1

2,6

DIP

Switch

1

2.

Environmental

Temperature:

P

Instrument:

Sensor:

|

|

Baud

RS-232

Adult

Unused

©

0-100%

0-1

0-40°C
0-50°C

Within

measurement

operating
storage

physiologic

Function

rate

select

format

or

neonatal

| |

Function

or

50%-100%

volt

or

0-10

volt

Requirements

range

(28-42°C)

alarm

range

settings

SaO2

output

for

accurate

scale

46

Humidity:

Any

humidity/temperature

combination

without

condensation

orcas

‘nasser

Altitude:

Voltage:

Power

Consumption:

Leakage

Current:

Battery:

0-10,000

100-120

25

watts

22

watts - monitor

3

watts - powerbase

50

10
10

Type:

'

Battery

Recharge

ft

|

Electrical

VAC, £ 10%,

maximum

uA

maximum,

uA

maximum,

uA

maximum,

Life:

Period:

Characteristics

50/60

Hz

electronics

electronics

power

patient
patient

mains

to

ground

connector

connector

Starved-electrolyte
3

each 2 Volt @ 2.5

- 2 hours

14
hours)

minimum

hours

.

to

ground

to

mains

minimum;

lead

AH - “D”

on

full

(80%

acid

battery

celis

charge

charge

after

pack

8

βαθμο

Dimensions:

Weight:

Patient

Module:

Charger

Type:

Physical

2.5" x 10° x 10"

2.5" x 10" x 7"

2.5" x 10" x 3º

8-lb

overall

5

Ib

(monitor)

3

lb

(powerbase)

4

m(13

ft)

long

LEMO

B-

series

front

panel

of

monitor

Float

Characteristics

overall
(monitor)
(powerbase)

12

pin

voltage,

250

mA

current

limit

©

47

wu

.

ad

7

z 1

VD

The

NELLCOR

of

functional

tional

hemoglobins.
instrument.
their

concentrations,

mance

or

may

intense

environmental

N-200

hemoglobin

Indocyanine

also

pulse

(e.g.,

may

be

compromised

Qualifying

oximeter

as

compared

carboxyhemoglobin,

green,

interfere

illumination.

is

calibrated

to

methyiene

with

the

by

excessive

an

blue,

Information

to

read

11282

CO-Oximeter.

methemoglobin)

and

other

accuracy

of

patient

oxyhemoglobin

Significant

may

intravascular

the

instrument.

movement,

saturation

levels

affect

the

accuracy

dyes,

depending

Instrument

electrosurgical

perfor-

interference,

(%SaO2)

of

dystunc-

of

the

upon

aise

48

X.

GLOSSARY

2,3-DPG:

Alarm

Averaging

Carboxy-
hemoglobin:

Default

Limits:

Time:

Settings:

Deoxygenated

Hemoglobin:

2,3-diphosphoglycerate; a plentiful
glycolytic
of

adult
the
shifted

Upper
measurement
alarms

The span
obtain a mean

which

A

species

with

that

Pre-established

and

default

Functional
as

deoxyhemogiobin

energy

hemoglobin

right;

fetal

to

the

and

lower

of

the

of

time

correspond

of

carbon

monoxide,

normally

that

remain

alarm-limit

hemoglobin

production

and

thus

hemoglobin

right

settings

exceeds

N-200

during

measurement;

to

dysfunctional

bind

oxygen

settings

effective

settings

does

for

the

upper

activate

which

Modes

hemoglobin;

which

that

until

for

that

or

reduced

of

1,

is

intermediate

red

cells;

shifts the

not

oxygen

limit

an

instrument

the

N-200

2,

and

occupies

are

in

effect

they

are

adults

not

combined

hemoglobin

2,3-DPG

oxyhemogiobin

contain

saturation

or

falls

offers

beta

below

averages

3

hemoglobin

the

sites

|

when

changed;

and

neonates

with

compound

binds

dissociation

chains

and

puise

the

incoming

three

averaging

that

on

the

hemoglobin

an

instrument

the

N-200

oxygen;

in

to

the

and

rate;

lower

has

has

also

the

beta

chain
curve

therefore

when

the

limit,

the

signals

times,

combined

molecule

is

turned

different

known

is

on

to

not

to

Dysfunctional

.

Hemoglobin:

ECG

Synchronization:

Electrocardiogram:

-

Event:

Hemoglobin

-

-

carboxyhemoglobin

C-LOCK

R-wave,

environment
information,

section

ECG; a graphic

activity

The

event

rate,

and

types

of

or

pulse

initiates;

beginning

state;

for

beginning

prematurely;

that

is

not

ECG

synchronization,

enhances

refer

of

this

and

when

to-the

manual

performance

tracing

of

the

heart

memory

pulse

events:

rate

alarm

for

alarm-limit

of

of

waveform

alarm-limit

activates,

the

alarm

user-defined

the

event,

one

hour

capable

or

methemoglobin);

of

by

the

patient's

discussion

of

the

change

muscle,

the

as

N-200

data

detected

(sampled

events,

and

events,

state

events,

it

can
of

and

last

event

the

the

up

data

reversibly

linking

of

the

perfusion

in

the

in

stores a “snapshot”

which

user-defined

snapshot

ends

snapshot

to

60

can

binding

also

known

pulse

detection

N-200

in a high-motion

is

poor;

“Principles

electrical.potentials

at

the

body

once

each

occur

each

events,

starts

30

30

seconds

starts

minutes,

be

stored

after

30

and

by

oxygen

as

of

(e.g.,

dyshemoglobin

to

the

for

additional

Operation"

associated

skin

surface

of

saturation,

second);

time

seconds

the

which

the

end

there

the

seconds

it

can

be

the

N-200

preceding

with

pulse

*

are

two

saturation

operator

before

before

ended

of

the

the

alarm

the

、

49

digne.

Event

Fractional
Saturation:

Functional

Limits:

Oxygen

Oxygen

Saturation:

Hemogiobin:

Hypoxemia:

Methemoglobin:

Upper
measurement
are

Oxygenated
hemoglobin,

Oxygenated
capable
dysfunctional

The
hemdgiobin
polypeptide
(HbA)
alpha

Insufficient

A

oxidized

functioning

and

lower

stored

oxygen-carrying,

in

hemoglobin

hemoglobin

of

transporting

consists

chains

contains

and

gamma

oxygenation

species

of

dysfunctional

from

as a reversible

settings

exceeds

the

event

including

hemoglobin

alpha and

the

those

iron-containing

of

that

chains

ferrous

for

oxygen

the

upper

memory

expressed

expressed

oxygen

identical
differ

of

of

dysfunctional

(oxyhemoglobin

is

excluded

haif-molecules,

in

amino

beta

chains;

|

the

blood

hemoglobin;

to

the

ferric

oxygen

saturation

limit

or

falls

below

the

N-200

as a percentage

hemoglobins

as a percentage

from

this

pigment

acid

fetal

state,

carrier

sequence;

hemoglobin

the

iron

which

of

and

pulse

rate;

the

lower

of

all

measured

that

of

only

and

reduced

caiculation

the

erythrocytes;

each

containing

adult

(HbF)

in

methemoglobin

prevents

when

the

limit,

data

are

measured

the

hemoglobin

hemoglobin);

two

hemogiobin

contains

is

it

from

Oximeter:

Plethysmograph:

R-wave:

Sensor

Spectrophotometer:

Trend:

Site:

A

photoelectric

An

instrument

limb

caused

passing

An
ventricles; a component

be

signal

this

The

sensor
sensor

An
dy

The
once

are
by

through

electrical

detected

is

provided

normally

place

has a recommended
site(s)

instrument

determining

trend

each

stored

the

N-200

instrument

that

measures

by

pulsatile

it

spike

in

the

by

the

N-200

through

does

not

on a patient's

that

estimates

the

amount

memory

second

in

the

of

the

and

trend

that

variations

variations

ECG,

of

the

as an

the

rear-panei

affect

performance

body

to

sensor

the

of

light

N-200

computes

memory;

measures

the

in

in

the

amount

which
QRS-complex

is

caused

“R-wave,”

ECG

which

records

up

the

site,

and

quantity

that

is

oxygen

averages

to

12

of

absorbed

hours

oxygen

the

volume

(also, a pacemaker

particularly

adversely)

sensor

most

colored

every

saturation

of

of

blood

by

depolarization

when

IN/OUT

of

connector;

is

applied;

also

have

material

saturation

five

seconds;

trend

data

an

organ,

present

the

each

an

in a light

and

can

of

blood

part,

or

|

of

the

spike

can

ECG

however,

NELLCOR

alternate

path

pulse

rate

those

averages

be

stored

|

or

E

50

ΧΙ.

WARRANTY

Nellcor
recorder/
from
materials

Warranted
transducers

Nellcor's
part

nt

See

in

Warranted

obligations

To

Whitesell

basis

covered
thereof)
will
Warranted
or
determine

become

to

Incorporated

interface,

Nellcor

during

Product

only

thereof)

workmanship

Product

under

request

repair

Street,

of

the

information

by

this

to

Nellcor

promptly

Product

parts

thereof,

whether

Nelicor's

make

engineering

warrants

and

or a Nellcor-authorized

its

Warranty

to

the

and

six

months

obligations

that

Nellcor

or

materials;

(or

part)

this

warranty

or

replacement

Hayward,

warranty,

and, # the

ship a comparable

or

part

reasonably

to

repair

property.

to

the

DURASENSOR

Period.

Purchaser

after

under

this

reasonably

and

other

are

California

provided

Nellcor

Warranted

loaner

is

at

Nellcor's
determined
or

replace

In

the

initial

(2)

than

under

by

will

course

improvements

initial

Purchaser

oxygen

distributor

The

Warranty

for

all-

Warranted

shipment

warranty

determines

to

provide

DURASENSOR

governed

94545,

this

warranty,

by

800

Purchaser,

authorize

Product

product

facility

by

Nellcor

Products

of

warranty

to

the

Warranted

transducer

will

be

Period

for

DURASENSOR

are

(1)

to

to

be

loaner

the

provisions

433-1244

Nelicor

Purchaser

is

other

tor

use

for

service.

to

and

that

each

new

(the

“Warranted

free

from

detects

is

one

year

Products

repair

covered

equipment

oxygen

Purchaser

except

or

replace

by

this
with

transducers.

set

forth

should

or

800

351-9754

reasonably

to

return

than a DURASENSOR

by

Purchaser

Nellcor

be

covered

parts,

service,

Product

and

Nelicor

or

by

ail

Products

part

pulse

oximeter,

in

workmanship

from

initial

DURASENSOR

oxygen

any

warranty

respect

below.

contact

believes

the

Warranted

during

shall

this

the

repair

warranty.

may

but

thereof.

interface,

Products”)

purchased

and

shipment

oxygen

transducers.

Warranted

and

to

All

rights

.

Nellcor

in

California.

that

the

to

any

defect

Product

be

such

and

at

Product

oxygen
period
or

transducer,

that

replace

Nelicor

or

parts

replaced

shall

not

be

of

the

©

(or

defective

25495

If

on

the

is

(or

part

the

.

Products,

shall

shail

required

Loaner

Purchaser
Purchaser's
repaired
return
provided

Shipping

If

Nellcor

shall
Purchaser.

shipments

Policy

is

or

the

loaner

that

reasonably

bear

the

under

responsible

location.

replacement

Neilcor

Procedures

All

Exclusions

This

warranty
misuse,
Products,
violation
or

than

that

Nelicor.

neglect

including

ot

Nelicor’s

have

been

equipment

determines

costs

of

other

shipping

this

does

not

or

accident:

but not

instructions;

modified

for

any

Purchaser

Product,

in

has

notified

shipping

costs

warranty

extend

that

limited

or

improperly

damage

must

return

and

agrees

accordance

Purchaser

that a repair

the

loaner

shall

be

shall

be

borne

to

any

Warranted

have

been

to

failure

that

have

disassembled,

to

or

loss

loaner

to

with

of

the

or

Product

paid

by

damaged

of

or

been

51.

of

any

loaner

equipment

pay

Nelicor

Nellcor's

terms

standard
of

replacement

and

the

by

Purchaser.

the

party

shipping

Products

faulty

attixed

or

by

causes

electrical

to

any

serviced

equipment

within10

any

charges

that

policy.

is

covered

repaired

Risk

parts

external

power;

nonstandard

or

days

imposed

loaner

thereof

policy

by

or

replacement

of

loss

the

product.

the

or

that

to

that

reassembied

while

it

is

after

receiving
for

failure

then

in

|

warranty,

Product

damage

have

been

the

Warranted

have

been

accessory

by

anyone

]

at

the

to

effect,

Nelicor

to

during

subject

used

in

attachment:

other

to

uJ

mad

Nellcor
products
issued
Nellcor-authorized

that

THIS

.

BE
PRODUCTS.
LIEU

IMPLIED

©

AGAINST

SPECIAL

makes

or

by

Nellcor,

of

Nellcor.

WARRANTY,

ISSUED

OF

ANY

WARRANTY

INFRINGEMENT.

OR

no

warranty

any

other

products

with

respect

distributor

TOGETHER

BY

NELLCOR,

THIS

WARRANTY

ORAL

OR

OF

CONSEQUENTIAL

with

respect
that
to

or

with

WITH

IS

THE

IMPLIED

MERCHANTABILITY,

NELLCOR

to

are

not

any

products

respect

ANY

SOLE

EXTENDS

WARRANTIES,

SHALL

LOSS,

OX/SENSOR

warranted

purchased

to

any

OTHER

AND

EXCLUSIVE

ONLY

NOT

DAMAGE

oxygen

products

product

| |

EXPRESS

TO

THE

INCLUDING

FITNESS

BE

OR

EXPENSE

transducers,

under

an

express

from a person

sold

under a brand

WRITTEN

WARRANTY

PURCHASER

WITHOUT

FOR A PARTICULAR

LIABLE

FOR

other

ANY

DIRECTLY

any

other

written

than

Nellcor

name

WARRANTY

AS-TO

AND

NELLCOR'S

IS

EXPRESSLY

LIMITATION

PURPOSE

INCIDENTAL,

OR

INDIRECTLY

disposabie

warranty

or

other

than

THAT

ANY

a

MAY

IN

-

OR

52

SERVICE

MANUAL

NELLCOR®

This

manual

pulse

oximeter.

manual

copied,

-

avallable

ee

is

provided

It

is

contains

transmitted,

upon

unpublished

request

provided

or

for

used

by

writing

N-200

NOTICE:

the

purpese

without

proprietary

for

any

the

PULSE

of

servicing

charge

information

other

purpose.

Company

OXIMETER

the

by

Nellcor

and

Additional

at

the

address

NELLCOR

incorporated.

Is

not

to

be

copies

below.

N-200

This

are

©1987

Nelicor

πο

Caution:

to

Federal

sale

Hayward,

Incorporated

law

by

or

on

Nellcor

25495

California

1-800-NELLCOR

(U.S.)

restricts

the

order

of a physiclan.

Incorporated

Whitesell

Street.

94545

|

this

©

U.S.A.

-

device

5380A-1287

F8812039

一

WARNING:

protection

The

NELLCOR

against

N-200

electrical

pulse

hazard,

oximeter

refer

all

contains

servicing

no

user-servicable

to

qualified

personnel.

parts.

For

WARNING:
type

and

rating.

WARNING:
isolated

patient

electrical

dures

and

For

continued

The

NELLCOR

connector

potentials

part

specifications

or

ground

protection

N-200

Is

provided

pulse

paths.

contained

against

oximeter

to

protect

To

protect

in

this

fire

hazard,

replace

Is a patient-connected

the

patient

the

Integrity

manual

must

from

of

be

fuses

only

medical

potentially

this

connection,

adhered

with

dangerous

to.

the

same

device.

the

proce-

An

)

SECTION

1,

INTRODUCTION

TABLE

OF

CONTENTS

Page

1-1

SECTION

SECTION

3.1.

3.2.

3.3.

3.4.

3.5.

3.6.

3.7.

2.

DESCRIPTION

3.

THEORY

GENERAL

3.1.1.

3.1.2.

~

3.1.3.

3.1.4.

C-LOCK

Automatic

Functional
Measured

CIRCUIT-LEVEL

PATIENT

MODULE

PROCESSOR

3.4.1.

Digital

_

3.4.1.1,

3.4.1.2.

3.4.1.3.

3.4.1.4.

3.4.1.5.

3.4.1.6.

3.4.2.

Analog

3.4.2.1.

3.4.2.2.

3.4.2.3.

3.4.2.4.

3.4.2.5.

3.4.3.

ECG

-

3.4.3.1.

3.4.3.2.

3.4.3.3.

3.4.3.4.

3.4.4.

A:B/D:A

3.4.4.1.

3.4.4.2.

3.4.5,

Timing

'

3.4.5.1.

3.4.5.2.

FRONT

3.5.1.

PANEL

Driver

3.5.1.1.

3.5.1.2.

3.5.1.3.

3.5.1.4.

3.5.1.5.

3.5.2.
POWER

Display

SUPPLY

BATTERY

3.7.1.

ON/STDBY

3.7.1.1.

3.7.1.2.

3.7.1.3.

3.7.1.4.

3.7.1.5.

3.7.1.6.

3.7.2.

Battery

OF

OF

OPERATION

THEORY

ECG

Synchronization

Calibration

vs.

Fractional

vs.

Calculated

DESCRIPTION

PCB

Section

_

Microprocessor
Memory

Wait

State

Clock

Timer

Pattern

Front

End

Main

Analog

Sync

Detector

Demultiplexer

Logic
LED

Drive

Front

End

Active
Offset

Detached

Power

Subsection

A:D

Conversion

D:A

Conversion

and Control

Polled
Interrupt

DISPLAY

PCB

Digit

and

Lightbar

Front

Power-Up
Speaker

PCB

PCB

CHARGER

Control

ON

State

ON

to

STDBY

STDBY

Voltage

Power-On

Charger

INSTRUMENT

Saturation

Subsection

Map

Generator

Generator

Circuits

Flags

Filters

Amplifier

Line

Processor

Panel

PCB

STDBY

and

Generator

and

LED

Signal

.

Circuitry

Lead

Indicator

Frequency

Processor

Bargraph

Drivers

Controls

Display

Driver

Circuit

Circuit

.

State

to

On

State

Regulator

Time

Circuit

Saturation

; :

UART

Current

Flow

Sensing

Flags

Flags

Drivers

Element

_

Delay

Drive

-

Test

3-1

3-1
3-2
3-2

3-3

.

3-3

3-4
3-4

3-5

3-5
3-5.
3-6

3-6

3-6

3-7

3-7
3-8

3-8
3-8
3-9

3-9
3-10

-310

3-10
3-11
3-11

3-11

3-12
3-12
3-12

3-13
3-13
3-13
3-13

3-14

3-14

3-14

3-14
3-15

3-15
3-15
3-15
3-15

3.8.

POWERBASE

3.8.1.

3.8.2.

Mother

Upper

3.8.2.1.

3.8.2.2.

3.8.3.

Middle

3.8.3.1.

3.8.3.2.

PCB

and

Lower

Upper

Daughter

Lower

Daughter

Daughter

Sample/Hold

ECG

Output

Daughter

PCB

PCB

PCB

Circuit

PCBs

3-15
3-16
3-16
3-16
3-17
3-17
3-17
3-18

SECTION

4.1.

4.2.

4.3.

4.4.

SECTION

5.1.

52.

5.3.

|

5,4.

5.5.

4.

TROUBLESHOOTING

INITIAL

TROUBLESHOOTING

DETAILED

<

4.2.1.

Failure

4.2.2.

Troubleshooting

4.2.2.1.

4.2.2.2.

MONITOR

4.3.1.

Top

4.3.2.

Power

4.3.3.

Front

4.3.4.

Display

4.3.5.

Battery

4.3.6.

Speaker

|

4.3.7.

Top

POWERBASE

4.4.1.

AC

4.4.2.

Powerbase

4.4.3.

PCB

4.4.4.

Powerbase

5.

TESTING
DESCRIPTION
REQUIRED

BATTERY

5.3.1.

Power

“5.3.1.1.

5.3.1.2.

5.3.2,

Unregulated

5.3.3.

Battery

5.3.4.

Instrument

5.3.5.

Battery

5.3.6.

ON/STDBY

PROCESSOR

5.4.1.

Test

5.4.2.

INAMP

5.4.3.

Sync

5.4.4.

IR

Channel

5.4.5.

RED

5.4.6.

A:D/D:A

5.4.7.

Operation

POWER

BASE

TROUBLESHOOTING

Modes

Summary

Monitor

Powerbase

DISASSEMBLY

Cover

Removal

Supply

Panel

PCB

Removal

PCB

and

Pack

Removal/Fuse

Driver

Removal

Cover

Replacement

DISASSEMBLY

Fuse

Replacement

Disassembly

Removal

Reassembly

AND

CALIBRATION

TEST

EQUIPMENT

CHARGER

Supply

Output

Noise

AND

Checkout

Voltages

Supply

Charging

Voltage

Shutoff

Operation

Switch

BOARD

Setup

Gain

Detector

Channel

TESTS

Verification

Alignment

Gain

Verification

Gain

Alignment

Verification

ALIGNMENT

AND

ASSEMBLY

PROCEDURES

AND

REASSEMBLY

and

Battery

|

PCB

AND

POWER

Voltage

Test

Test

Verification

GUIDE

PROCEDURES

Charger

Removal

Replacement

REASSEMBLY

SUPPLY

PCB

TESTS

Removal

SECTION

6.

ADDITIONAL

SERVICE

INFORMATION

SECTION

7.1.

7.2.

SECTION

8.1.

8.2.

8.3.

8.4.

SECTION

SECTION

7.

PACKING
REPACKING
PACKING

8.

SPARE
EXTERNAL

IN

PARTS

PARTS

ELECTRICAL

8.2.1.

8.2.2.
MECHANICAL

8.3.1.

8.3.2,

Monitor
Powerbase

Monitor
Powerbase

CHASSIS-LEVEL

9.

SCHEMATIC

10.

INDEX

FOR

SHIPMENT

IN

ORIGINAL

DIFFERENT

ASSEMBLIES

PARTS

ASSEMBLY

DIAGRAMS

CARTON

CARTON

VIEWS

10-1

NELLCOR

OXISENSOR,

and

DURASENSOR

OXIBAND

and

are

registered

C-LOCK

trademarks

are

trademarks

of

of

Nellcor

Nellcor

Incorporated.

Incorporated.

SECTION

1

INTRODUCTION

This

manual

fied

by

N-200

powerbase

covers

its

two-piece

is

the

powerbase.

provides

Communication

This

manual

the

NELLCOR

removed,
dures
patients,

certain

can

adversely

the

is

procedures

personnel.

test

consiruction.

AC

between

provided

N-200

pulse

components

affect

and

repair

of

the

The

front

The

monitor

power

monitor

to

qualified-service

oximeter.

are

the

instrument's

described

to

the
and

critical

in

receives,

monitor

powerbase

Dangerous

this

NELLCOR®

part

of

the

processes,

and

drives

is

provided

personnel

voltages

to

maintain

calibration.

manual

are

'

N-200

N-200

and

peripheral

for

the

are

patient

For

the

only

to

pulse

is

the
stores

oximeter.

monitor;

display

The

the

patient

and

pulse

by a bi-directional

purpose

exposed

isolation,

protection

be

of

maintaining

when

and

of

performed

the

improper

service

by

qualified

|

N-200

back

part

data;

recording

optical

link.

and

cover

repair

personnel

service

is

identi-

of

the

the

devices.

repairing

is

proce-

and

Repair
and

the

manual.

and

improper

insirument.

The
important
“CAUTION”

damage

to

warnings

testing

repair

term

to

ensure

brings

the

and

cautions

of

the

instrument

or

adjustment

Where

appropriate,

“WARNING”

the

safety

attention

instrument

be

exposes

may

warnings

is

used

of

the

service

to a procedure

or

an.error

read

carefully

service

affect the

or

to

bring

personnel

that

in

calibration

and

followed.

personnel

accuracy
cautions
attention

have

to a procedure

or

should

be

or

performance.

to

or

patient

been

possibly

carefully

It

potentially

hazardous

protection

included

the

followed

is

in

or

precaution

patient.

in

important

-

associated

the

text

that

The

word

order

to

that

these

voltages,

with

of

this

is

prevent

一

一

1-1

ST

leseriptio

La

stream

n

ent

sf

oN

SECTION

2

DESCRIPTION

The

NELLCOA
saturation
or

disposable

The

intended

recharged

Front
adjustment
connector
standard

fier

and

instrument

for

operation

whenever

panel

controls

of

is

located

patient

and

sensor
with a maximum
currents

WARNING:
be

generated

To

replaced

Incorporated.

A

number

ㆍ

of

patient

C-LOCK™ECG

the

ICU

or

OF

THE

INSTRUMENT

N-200

pulse

adhesive-attached

is a portable

alarm

and

assure

with

pulse

rate.

for

the

allow

limits

on

the

cable

is 4 meters

ECG

leakage

by

faulty

continued

any

parts

oximeter

The

measurement

sensor

unit,

weighing

periods

unit

of

is

connected

adjustment

for

high

and

front

panel

in
connectors.
current

of

10

equipment,

patient

other

than

is

intended

to a finger

about 8 pounds

up

to 2 hours

to

of

the

low

for

connection

length

The

entire

microamperes.

e.g.,

those

. ,

safety

and

labor-saving

synchronization

the

NICU.

enhances

for

continuously

is

made

non-invasively

or

other

during

AC

power,

beeper

oxygen

volume,

saturation,

of

and

is

terminated

patient

This

defibrillators

safety,

the

patient

designated

features

are

performance

site

total,

power

and

the

module

provides

or

incorporated

monitoring

by

applying a reusable

on

the

patient

with a self-contained

failures

is

fully

alarm

and

patient

by a module

assembly

electrosurgical

module

or

manufactured

in

high-motion

or

transport.

recharged

volumes,

high

and

module

containing a preampli-

is

safety

or

sensors

into

the

alarm

low

assembly.

isolated

for

units.

environments,

arterial

to

in

the

by

N-200:

| |

oxygen

be

monitored.

batiery

The

14

hours.

disabling,

pulse

rate.

The

from

patient

©

must

Nellcor

.

clip-on

battery

and

A

ground

from

not

such

as

|

is

Three
presence

The

N-200

and

one

・

Twelve

_

one

hour

_

These

-

«Non-invasive

light-emitting

infants,

Patented

4,621,643

.on,

at

sitivity

pigmentations.

operating

of

varying

is

equipped

for

neonates.

hours

of

of

saturation,

data

can

NELLCOR

diodes

children,

automatic

and

others

periodic

intervals

changes

modes

provide

levels

with

of

patient

two

-

oxygen

be

saturation

pulse

provided

rate,

to a variety

sensors

as

light

sources.

and

adults.

calibration

pending).

thereafter,

automatically

to

different

averaging

activity.

sets

of

and

pulse

and

pulse

obtain

Specific

default

alarm

rate

data

perfusion

of

analog

or

measurements

sensors

.

mechanisms

The

N-200

and

are

incorporated

automatically

whenever a new

accommodate a wide

|

times,

limits,

are

data

digital

by

are

calibrates

sensor

range

adapting

one

for

stored

optical

available

are

stored

output

in

the

is

of

tissue

in

devices.

means

connected.

|

the

N-200

use

in

monitoring

the

trend

in

the

alone,

for

use

on

N-200

itself

(U.S.

each

thicknesses

for

use

in

adults

memory,

event

memory.

using

two

neonates,

Patent

time

it

is

Instrument

and

skin.

the

and

turned

sen-

Internally,
largest
tains
power
the
are
switches.

The
The
daughter
sembly

the

circuit

the

analog

supply

left

side

located

powerbase
mother

PCBs

and

monitor
board

PCB

of

the

immediately

PCB

disassembly

contains

(mounted

processing

is

located

instrument

contains a power

is

mounted

are

mounted

five

printed

on

the top

circuitry

on

the

chassis

behind

the

front

. :

supply
vertically
horizontally

are

found

in

circuit

boards

cover

of

the

and

the

microprocessor

back

of

the

monitor.

when

viewed

panel

transformer, a mother

at

the

and

Section

from

and contain

front

of

the

mate

to

4.

(PCBs),

monitor)

with

The

battery

the

front.

the

powerbase

the

mother

is

LED

PCB

the

the

its

The

PCB.

battery,

processor

associated

charger

displays

and

(facing

and a speaker.

PCB

display

and

three

the

Details

PGB,

circuitry.

is

and

driver

front

daughter

monitor);

of

instrument

which

con-

The

located

PCBs

panel

PCBs.

the

The

along

as-

TÅ

epr

/

y

of

pere

“en

SECTION

3

Te

THEORY

Theory

and

discussed.

3.1.

The

functional

The

consisis
monitor
low-voltage,
light

OF

of

operation

the

physical

GENERAL

NELLCOR

oxygen

instrument

of

an

that

processes

low-intensity

receiver.

(approximately

When

the

light

light

is

absorbed

that

passes
amount
analogous

With

ated

hemoglobin

it

absorbs.

those

through,

of

absorption

to

each

heart

The

measurements

oxygen.

OPERATION

is

presented

principles

of

THEORY

N-200

combines

provides

saturation

and

the

electro-optical

and

displays

light

One

LED

emits

920

nm).

from

the

LEDs

by

skin,

tissue,

and

this

remains

the

reference

beat, a pulse

differs

N-200

measurement

from

continuously

to

determine

in

two

parts.

its

operation

continuous,

pulse

principles

sensor

emitting

red

light

is

transmitted through

bone,

information

essentially

is

presented.

non-invasive,

rate.

of

spectrophotometric

that

is

applied

the

measurements.

diodes

(approximately

and

blood.

is

used

constant

of a spectrophotometer.

of

oxygenated

deoxygenated

arterial

hemoglobin

measures

the

percentage

First, a general

Next,

self-calibrated

to

the

patient

The

(LEDs)

absorption

as
660

the

tissue

The

photodiode

to

determine

during

blood

in

of

functional

light

nm).and

the

flows

the

of

overview

the

of

details

the

of

circuit

N-200’s

operation

measurements

oximetry

and

plethysmography.

and a microprocessor-based

electro-optical

sources

the

at'the

in

the

how

much

diastolic

to

the

amount

both

red

and

hemoglobin

sensor

and

one

photodiode

other

emits

infrared

sensor

site, a portion

sensor

light

was

measures

absorbed.

(nonpulsatile)

sensor

of

site.

red

and

infrared

that

is

This

infrared
light

saturated

capabilities

of

both

contains

as

light

of

the

phase

and

oxygen-

light

and

uses

are

it

two

a

the

light

The

that

with

-

is

When

the

presence

tlow

for

the

absorption

3.1.1.

C-LOCK

When

the
cardiac
of

There

activity:

the

instrument

is a time

QRS-complex

of

this

delay

N-200

“between

average

the

measures

the

delay

sensor

pulsatile

of

that

amount

at

blood.

each

blood

wavelength

ECG

N-200

is

one

in

delay

is

detected, a pulse

varies

with

this

occurrence

is

used

site.

is

present,

The

NELLCOR

of

light

absorbed

is

then

Synchronization

provided

from

the

between

time

with

ECG

the

sensor

presence

of

the

the

heart

rate,

delay, and,

of

the

R-wave

to

establish a “time

|

the

light

absorption

N-200

then

at

the

initial

used

to

input,

it

and

the

other

patient

electrical

will

movement,

and

be

detected

the

patient's

after a few

and

the

window”

at

corrects

measurements.

calculate

is

receiving

functional

from

the

as

mechanical

at

the

physiology,

pulse

beats,

detection

during

both

wavelengths

the

measurements

The

two

signals

ECG.

discussed

activity

sensor

of

which

site a short

and

calculates

the

optical

the

ratio

oxygen

that

This

enhances

below.

of

the

the

pulse

optical

is

changed
during

of

the

corrected

saturation. - |

independently

the

performance

heart.

When

time

later.

location

the

of

average

by

the

pulse

the

delay

sensor.

is

expected

by

the

the

pulsatile

reflect

an

ECG

The

length

sensor.

This

The

at

A

pulse

that

pulse

that

average

the

to
dently

rate

if
activates
been

3.1.2.

delay

patient's

determine

in

the

and

saturation.

either

the

and

re-established.

Automatic

is

received

is

received

and

the

physiology.

pulse

rate

ECG

and

optical

pulse

C-LOCK

Calibration.

within

this

outside

pulse

the

time

window

If

the

ECG

and

initiate

signals,

or

the

ECG

synchronization

time

time

window

are

signal

saturation

this

ECG

signal

window

is

considered a real

is

considered

recalculated

is

irregular

calculations.

method

provides

is

markedly

is

suspended.

with

each

or

noisy,

degraded

an

then

Since

the

most

it

will

pulse

artifact

pulse

beat

the

artifacts

stable

or

lost,

resume

and

is

and

is

rejected.

to

adjust

optical

pulse

often

appear

measurement

the

appropriate

once

both

processed.

Both

for

changes

alone

is

indepen-

of

alarm

inputs

have

A

the

in

used

pulse

Patented
system
tured:

resistor,

calibration

The
when a new
matically

3.1.3.

Because

_

differ

Functional

the
to

measure

bin.

automatic

(U.S.

Patent

the

effective

and

then

coefficients

N-200

is

automatically

sensor

to

compensate

Functional

the

N-200

from

those

oxygen

hemoglobin

saturation,

It

does

not

carboxyhemoglobin

In

contrast,

oxygen

some

saturation

as a percentage

transport.

Dysfunctional

measurements

consider

whether

calibration

4,621,643

mean

checked.

is

vs.

Fractional

measures

of

instruments

saturation

that

is

detect

the

or

other

values.

of

total

from

the

the

other

mechanisms

and

others

wavelength

That

calibration

that

are

used

for

calibrated

connected.

for

Also,

differences

Saturation

functional

that

measure

is

defined

capable

it

methemoglobin.

laboratory

hemoglobin,

hemoglobin

of

measures

presence

Fractional

N-200

are

instrument

transporting

only

of

instruments,

saturation

whether

species

compared

are

incorporated

pending).

of

the

red

LED

resistor

the

measurements

each

time

it

the

intensity

in

tissue

thickness.

oxygen

fractional

as

oxygenated

oxygen.

oxygenated

significant

such
is

or

not

are

with

is

measuring

Each

sensor

is

determined,

is

read

is

turned
of

each

saturation,

oxygen

hemoglobin

Because

and

deoxygenated

amounis

defined

included

those

as

the

as

that

hemoglobin

in

from

of

functional

into

the

N-200

is

calibrated

coded

by

the

N-200

obtained

on,

LED

it

may

by

at

periodic

in

the

produce

saturation.

expressed

the

N-200

dysfunctional

IL-282

CO-Oximeter,

oxygenated

is

available

this

calculation.

another

or

instrument,

fractional

pulse

oximetry

when

it

is

into a calibration

software

that

intervals

sensor

to

sensor.

is

adjusted

determine

thereafter,

|

measurements

as a percentage

uses

two

wavelengths

(i.e.,

functional)

hemoglobin,

report

hemoglobin

Consequently,

expressed

for

oxygen

it

is

important

saturation.

manufac-

the

and

auto-

that

of

hemogio-

such

as

fractional

when

to

3.1.4.

Measured

When

oxygen

the

oxygen

has

been

calculated

effect

of

variables
temperature,
Operator’s

„=

vs.

saturation

saturation

that

pH,

PaCO2,

Manual

for

Calculated

is

measurement

from

blood

shift

Saturation

calculated

gas

the

relationship

2,3-DPG,

additional

information.

from

of

the

PaO2

and

blood

gas

N-200.

has

This

not

necessarily

between

the

concentration

PaO2,

is

PaO2

the

because

been

and

saturation.

of

fetal

calculated

an

oxygen

correctly

These

hemoglobin.

value

may

saturation

adjusted

variables

Refer

differ

value

for

the

to

the

from

that

include

3-2

3.2.

CIRCUIT-LEVEL

Refer

to

Section 9 for

consist

»

»

*-

Since
(one
site
photodiode
by a two-channel
the
switching
digital
identify
the

of:

the

patient

the

analog

the

front

the

battery

the

instrument

the

IR

and one

into a single

other

(A:D)

individual

red

wavelength

module

processing

panel

charger

measurement

signal,

sensitive

frequency

converter.

DESCRIPTION

the

instrument

circuitry

display

powerbase,

red)

photodiode.

representing

synchronous

to

pulses

compared

are

the

as

and

of

used

red

well

This

and

logic

power

oxygen

as

digital

schematic

and

*

supply

which

contains

saturation

to

generate

The

LEDs

light

from

detector,

light

waveform.

electrical

signal

compute

to

the pulse

and

block

microprocessor

the

data

requires

light

which

are

illuminated

both

LEDs

one

channei

or

is

the

These

ambient

then

oxygen

seen

signals
noise,

processed

saturation

by the

diagrams.

circuitry

communications

light

of

two

different

is

passed

alternately

in

sequence,

sensitive

IR

through

with a four-state

to

the

are

then

and

then

by

the

microprocessor

from

the

wavelength.

The

major

interface

wavelengihs,

the

is

amplified

infrared

filtered

digitized

ratio

of

circuit

tissue

and

light

to

remove

by

an

the

pulse

sections

circuitry.

two

at

the

sensor

clock.

The

then

separated

waveform

the

LED

analog

in

order

seen

to
to

LEDs

and.

by

o

Throughout
overbar

3.3.

PATIENT

The

patient
(ECG)
generated

The

drive
processor
is a bipolar

LEDs. A positive

The

drive

tector

--

The

detector

preamplifier
DETECTOR
regulator
increases
additional

this

above

module

signals

by

current

board

current

current

response.

U2

current

VR1

the

voltage

section

the

signal

MODULE

contains

(refer

to

SCHEMATIC

the

processor

for

the

(VIR

and

drive

current

is

controlled

photodiode

is a current

to a SAT

biases

swing

the

of

the

headroom

and

on

the

schematics,

name

(for

example,

preamplifiers

board.

pair

of

sensor

VRED
which
pulse

generates a current

preamplifier

on

is

passed

drives

by a feedback

to

voltage

voltage

1:V

converter

is

necessary

for

PATIENT

LEDs

SCHEMATIC

through

the

IR

(1:V)

signal.

to

approximately

to

an

for

active

“SIGNAL”).

the

saturation

MODULE

is

supplied

PROCESSOR

the

patient

LED

and a negative

loop

on

the

proportional

converter

The

effective

high

in

conversion

ambient

low

logic

signals

(SAT)

and

PCB),

Power

from

the

instrument,
PCB,

module

current

processor

to

the

amount

an

inverting

ratio

is

+8.5 V output

output

swing

light

conditions.

are

designated

electrocardiogram

for

the

circuitry

generated

SHEET

to

the

pulse

board

of

configuration

250

mV/uA.

for 0 current

of

+8.5 V to

4).

back-to-back

drives

in

response

light

received.

that

Voltage

input.

-10

by

ist15V

This

waveform

the

to

、

converts

V.

The

an

on

the

sensor

red

LED.

photode-

SAT

the

This bias

o

„o

Instrumentation
mately
high-energy
provide

‘transients

the

30.

further

power

Neon

pulses

to

the

supply

amplifier

lamps

isolation

low-impedance

voltage

DS1,

which

from

U1

may

levels

preamplifies

DS2,

result

high

transient currents.

power

when

and

DS3

from

supplies.

an

the

defibrillation

ECG

ECG

are

used

Resistors

signal

signal.

Gain

to

protect

procedures.

Diodes

lead

has

CR1

R3

of

the

U1

from

Series

through

and

R4

become

amplifier

pull

detached.

is

potentially

resistors

CR4

shunt

the

input

set

for

approxi-

damaging

R1

and

high-voltage

signal

R2

lines

to

Common
inverted
the
leads.

The

the

would
This

sor
in
damage
replaced.

3.4.

The

Refer

3.4.1.

The

SHEET

3.4.1.1.

through

patient

The

sensor

sensor.

result

calibration

board.

epoxy

to

to

PROCESSOR

processor

to

SCHEMATIC

Digital

digital

1.

Microprocessor

mode

signals

at a constant
ECG

contains a calibration

Because

in

the

resistor

Since

prevent

the

sensor

PCB

Section

section

A1

and

operational

potential

signal

from

U1

the

wavelength

computation

is

connected

the

patient

any

PCB

contains

of

the

module

damage

contacts

PROCESSOR

N-200

amplifier

most

Subsection

A2

from

U1

U2. The

and

eliminate

goes

directly

resistor

of

the

for

oxygen

directly

assembly

from

moisture

or

to

the

of

the

PCB,

processor

are

summed

output

to

that

codes

red

saturation

through

is

cable

or

active

circuitry

SHEETS 1 through

PCB

of

common

the

processor

the

LED

varies

if

the

used

close

and

is

not

connector

is

shown

U2

not

in

through

mode

wavelength

instrument

repairable.

on

R9

is

fed

back

signals

board.

from

one

corrected

to

the

patient

itself,

the

the

N-

200, both

4, in

SCH

EMATIC

and

Ri0,

to

the

from

of

the

sensor

for

by

cable

assembly

environment,

In

the

entire

the

following

PROCESSOR

amplified,

patient

the

red

to

the

event

assembly

analog-and

to

input

LED

mounted

another,

calibration

to

of

failure

discussion.

and

maintain

sensing

an

error

resistor.

the

proces-

it

is

potted

or

must

be

digital.

PCB,

in

:

_

The

processing

mode

microprocessor
EPROM
diagnostic,

which

provides
battery

Processor

low-order
present
address

on

these

The

upper 4 address

address

decoding:

low

when

signal

latches

(U21)

while

trend

time

back-up

(U8)

address

on

these

in

transparent

lines.

and

status

This

pin

it

is

addressing
this

power

of

the

RAM/ROM

the

32K x 8

and

event

data

and

date

to

prevent

pins 9 through

byte

lines.

information.

(U8,

bit

data

and a data

The

ALE

octal

latch

lines

of

pin

35)

RAM

in

flip-flop

N-200

pulse

configuration.

system

memory

information

loss

when

16,

designated

byte.

signal

(U8,

U33.

In

U8

(A16

through

Only

the

is

at

logic

or

performing

U3.

oximeter

Program

RAM

(U15)

functions.

used

during

the

instrument

AD0-AD7,

On

the

first

pin

25)

the

following

A19)

uppermost

high

when

input/output

3-4

is

contained

provides a data

The

RAM

trend

clock

pulses

clock

.

are

also

bit

(A19)

the

system

within a standard

memory

is

mated

and

event

is

in

standby.

are

multiplexed

cycle

of

high

to

cycles,

multiplexed,

is

used
is

(I/O)

functions.

is

contained

buffer,

an
latch the

data

addressing

stack,

to a “Smartwatch”

recording,

.

to

alternately

instruction,

lower

can

flow

alternately

in

the

N-200

ROM

The

processor's

8088

minimum

in

one

64K x 8

scratchpad,

socket,

as

well

as

present

an

address

byte

of

the

bidirectionally

carrying

for

address

space,

and

ALE

the

is

3.4.1.2.

The

accessed

The

sidered
starting

images

uniquely

RAM

starting

-

apart,

Memory

entire

(read

upper

RAM
at

of

the

decoded.

begins

at

ranging

Map

processor

from

512

kbytes

and

I/O

hex

FFFFO

64

kbyte

at

address 0 and

address

hex

from

system

or

written

of

space.

after

ROM

8000.

hex

8000

is

memory

ROM

reset.

are

extends

The

to

memory

to) at

specific

are

resides

Since

repeated

I/O

hex

80F0.

mapped.

memory

considered

in

the

only

64

kbytes

up

to

the

for

32

kbytes.

select

lines

That

locations

ROM

top

64

512

I/O

coming

is, all

devices

space;

kbytes

of

the

kbyte

functions

from

in

the 1 Mbyte

the

lower

of

memory,

ROM

space

limit

because

reside

U17

and

on

the

8088

512

kbytes

with

are

memory

directly

U23

are

data

memory

are

the

program

actually

used,

is

above

16

addresses

bus

are

range.

con-

not

RAM,

3.4.1.3.

Two

whenever

(addresses

“

3.4.1.4,

U2

|

drives

a
quency.

-A
following

oscillator

3.4.1.5.

Additional
device

“4.

Walt

D-type

flip-flops

I/O

between 0 and

Clock

produces a processor

UART

33%

duty

cycle

U2

divides

reset

circuit

power-up.

stabilize.

Timer

peripheral

U16.

The

Display

within

update

the

State

Generator

in

is

addressed

Generator

U16

and

clock,

the

composed

This

Circuits

82C53

interrupts

system

U1

form a wait-state

(that

is,

32k)

generates

clock

with

the

two

timer

the

crystal

22.1184

of

Ri,

MHz

CR1,

maintains

and

UART

devices

include

sections

to.the

program).

generator. A wait

whenever a peripheral

no

wait

state.

the

correct

chips

oscillator

signal

and

the

logic

two

duty

U34

and

runs

by

three

C19

ensure

at a known

82C53

cycle,

U38.

at

22.1184
and

that

triple

counter/timer

control:

8088

at a 2.5

ms

rate

state

device

as

well

Because

MHz,

provides

U2,

pin

state

while

(also

provides

of

one

clock

cycle

is

accessed).

Accessing

as a peripheral

the

8088

processor

three

times

the

the

correct

11,

16

the

chips

held

power

U34

fc

for

duty

low

supplies

and

real

is

generated

RAM

clock

which

U8

requires

desired
cycle

to

fre-

U8.

immediately

and

U38

and

time

references

crystal

UART

2.

Baud

rate

for

the

8251

UART

(U16),

which

drives

an

optical

between

G

Audio

4.

Clock

5.

Pattern

which

>

the

monitor

frequency

frequency

generator

controls

and

powerbase.

generation

for

the

ECG

clock

frequency

synchronous

The

baud

for

the

alarm

beeper

switched-capacitor

{the

pattern

circuit

operatioris.

rate

is

(TONE).

notch

generator

data

set

at

filter

(NCLK).

is

composed

19.2

link

for

kbaud.

of

communication

U39,

U35,

and

U28),

3-5

3.4.1.6.

The

contro!

In

counter

selected
serves

the

sampling

3.4.2.

The
SHEET

Pattern

pattern

sync

Generator

generator

detector

(U39,

gating,

operation, a preprogrammed

U39,

through

to

next

address.

Analog

analog

2.

clocked

“de-glitch”

speeds

Front

circuitry

by

address

the

Various

along

End

and

|

U35,

LED

the

divided

lines

EPROM

patterns

with

real

and

LED

and

control;

bit

A8-A10

outputs

time

LED

drive

U28)

provides

and

pattern

down

on

in
processor
U35

by

within

the

calibration

Current

circuitry

is

power

EPROM

through

holding

EPROM

patterns

Drive

shown

software

supply

U35

clock

octal

the

last

are

used

and

on

SCHEMATIC

selectable

timing

synchronization

is

continuously

output.

One

latch

U40.

output

to

select

byte

diagnostic

of

Additional
while

LED/sync

timing.

PROCESSOR

patterns

triggers.

cycled

eight

patterns

the

through

can

latch

U28

counter

detector

PCB

used

by

be

steps

to

to

3.4.2.1.

The

SAT

-

quad

operational

coupled

composed
verting

gain

amplifier

function
operation,
largest

the

possible

signal/noise

Voltage

3.4.2.2,

The

INAMP

is

pulled
SATINVERT
equalize

3.4.2.3.

The

output
nously
C30)

-amplifier

20

with

suppress

Hz).

The

Main

Analog

signal

from

Signal

the

patient

amplifier

to

another U27

of

Digital-to-Analog

(U32)

that

the

composite

signal
(S/N)

regulator

Sync

Detector

stage

to

ground

is

high,

the

magnitudes

op

with

can

vary

is

fed

ratio.

VR3

provides a low-noise 5 V

drives

sync

potential,

the

stage

of

Demultiplexer

of

the

sync

detector

the

and

filters

IRGATE

switching

low-pass

are

slightly

and

filtered

Flow

|

module

U27

in a 2-pole

amp,

configured

Converter

gain

of

between 0 and

signal

is

into

the

detector

and

the

passes

51.

Together,

always

next

U32.

stage

Butterworth

as a gain

(DAC)

51.

maximized

stage

becomes

becomes a noninverting

the

inverting

drives

REDGATE

transients.

by

two

overdamped

and

both

halves

steering

The

signal

active-filter

to

through a 50

configuration).

stage

U44

and

the

two

circuits

This

gain

is

by

the

of

synchronous

DC

supply

If

the

SATINVERT

an

inverting

voltage

noninverting

of

U14.

pulses.

in

each

stages

improve

Low-pass

channel

(each

step

kHz

low-pass

The

with

unity

gain. A variable

amplifier

U32

is

provide a programmable

called

INAMP

operating

(input

software

demodulation;

for

U44.

signal

is

at

amplifier

follower.

Trimpot

gains.

U14

demultiplexes

filters

(R47

is

then

buffered

with

two

poles

response.

filter

(one

signal

is

followed

amplifier)

such

this

logic

low,

with

unity

R123

the

signal

and

by a unity-gain

at

approximately

quarter

then

of

AC

attenuator

by a nonin-

variable-

gain.

that

the

helps

optimize

U32,

pin

10,

gain.

When

is

used

synchro-

C14;

R52

and

|

In

to

The

last

stage
positive
voltage

voltage

dividers

process 0 to

sion

stages

the

outputs

seen

at

TP10

in

each

channel

(approximately

R50

and

10 V signals,

that

follow.to

negative.

is

twice

Because

that

is

R46

(R80

the

positive

ensure

the

seen

an

0.25

that

RED

at

TP9

offset
V).

This

and

R74).

bias

the

channel

when

amplifier

voltage

Since

with

gain,

is

derived

the

Analog-to-Digital

provides a reference

tota!

chain

offset

errors

has

twice

the

no-signal

input

3-6

which

from

floor
of

gain

is

present.

offsets

VREF

the

(set

at

Converter

for

analog-to-digital

the

op

amps

of

the

IR

channel,

signals

10

V)

can

can

never

the

by a small

and

the

only

conver-

drive

offset

3.4.2.4.

Loglc

Flags

Several

to

vary

those

which

LEDHI

|

INAMPHI

LEDLOW

flags

are

produced

circuit

parameters

would

saturate

The

SAT
without
the

filtered

(SAT

less

rail.

This

then

reduces

Following

ates

the

When

the
INAMPHI
lower

the

If

asensor

tive

an

amount

‘because

sensor.
negative

When

comparator

-5 V reference,
increases

This

condition

exposure. A delay
changing
passing

C74,

CR8,

causes

in

the

(gain

on-board

signal

coming

saturating

(and

than

the

halved)

-10

condition

the

LED

the

INAMP

INAMPHI

INAMP

flag

signal

is

the

The

voltage.

drive

in

the

the

gain

is

set.

level.

exposed

proportional

ambient

|:V

converter

it

sets

current

occurs

frequently
SAT

signal

and

U27

circuit

to

analog

and

LED

section

drive

currents)

of

the

processor

so

that

electronics.

from

the

patient

V),

the

sets

drive

SAT

signal

the

LEDHI

module’s

signal

currents

programmable

interrupt.

The

This

is

set

too

processor

to

bright

to

light

causes

in

the

U20

senses

LEDLOW

to

the

LEDs when

when

the

of

up

to

30

seconds

changing

patient

is

circuit

high,

light,

the

patient

negative-going

high.

patient

ambient

module

analog

amplifiers.

to a -5 V reference.

too

close

to

the

flag,

which

interrupts

to

avoid

signal

gain

section,

compares

the

signal

then

reduces

the

output

ambient

an

increase

module

The

removes

is

of

light

exposure.

in

converts

voltage

processor

LEDLOW

provided

light

conditions.

through a fast-attack/slow-decay

before

be

sensitive

it

reaches

comparator

only

to

negative-going

PCB

signal levels

can

range

Comparator

When

patient

the

saturation.

another

the

signal

level

exceeds

the

gain

of

the

patient

This

the

photodetector

the

signals

polls

the

is

high

the

sensor

to

prevent

The

Circuit

U20.

The

signals.

that

instruct

are

from

+8.5 V to

the

module's

processor.

comparator

the

kept

U20

signal

negative

The

(U20)

processor

safely

-10

V

compares

drops

power

processor

gener-

to a 10 V reference.

10

V,

and

the

the

INAMP

module

condition

increased

:

more

LEDLOW

for

improved

from

high

the

LED

delay

formed

orientation

stage

is

driven

occurs

current

from

current

positive

flag

S/N

ambient

current

is

implemented

by

R95,

of

diode

to

nega-

to

than

and

ratio.

light

from

below

too

low

the

a

its

R96,

CR8

.

by

3.4.2.5.

The

analog

red

and
determined
hold

subsection

board.

-

PCB

SHEET

The

voltage

of

error

and

9)

RED

forward
Q4,

Q5,

and

fed

voltage
is

approximately

LED

switches

IR

LEDs

by

Control

level

amplifier

goes

to

and

IR

select

biasing

and

back

at

TP8

Drive

Circultry

so

that

the

SAT

(SCHEMATIC

signals

1,

U28).

at

TP8

U32

the

back-to-back

IR

either

Q7

sieer

to

pin

13

and

independent

50

mA.

in

U19

the

signal

RED

Drive

is

and

the

or

red

the red

the

current

of

error

allow

the

two

LEDs

level

from

PROCESSOR

and

IR

come

circuitry

translated

six

converts

signal

IR/red

LED

drive,

or

IR

LED;

flow.

amp

U32,

of

the

gating

of

separate

can

be

run

at

different

the

photodetector/patient

PCB

SHEET

from

the

pattern

the

VRED

to

current

transistors

LEDs

determining

O3

The

thus

+5 V supply

for

LED

Q2

of

the

sensor

the

and

Q6

act

current

through

maintaining a constant

that

. |

3-7

drive

intensities.

4,

U18

generator

and

VIR

drive

via a bridge

through

assembly.

haif

of

as

current
the

powers

voltages

module

and

(SCHEMATIC

voltages

Q7.

The

In

the

bridge

boosters

LEDs

is

current

the

bridge.

(VRED

U11)

VRED

and

on

and

and

set

the

VIR)

by

processor

PROCESSOR

to

drive

currents.

driver

circuit

bridge output

operation,

circuit

sensed

the

that

for

U32,

by

resistor

proportional

Maximum

for

VIR

are

the

sample/

consisting

(J3

pins

signals

is

active

while

Q2,

Ri2

to

LED

current

the

7

and

3.4.3.

Refer

ECG

Front

to

SCHEMATIC

End

PROCESSOR

PCB

SHEET 3 in

the

following

discussion.

3.4.3.1.

The
gain

The
40

.

U6

derived
AC

À
transients

Ahigh-pass

stage.

resets

a
tractions),
the

When
the

-

3.4.3.2.

Actlve

ECG

of

the

ECG

Hz

and

is a switched-capacitor

from

power

second

Because

the

lead

comes

high

the

filter.

Offset

Filters

signal

chain

is

first

the

gain

timer

line

interference.

2-pole,

inherent

filter

this

filter

by

loose

the

ECG

(approximately

ECG

baseline 1 rises

Amplifier

from

the

of

active

low-pass

is

equaito

IC

U34

40-Hz

in

switched

(U12)

low-pass

with

filter

discharging

from

signal

1000)

patient

filters

filtered

stage

the

module

is

by

1.

notch

filter

(PROCESSOR

(See

Section

filter

capacitor

gain

of

has a long

the

patient

baseline

combined

too

much,

is

conditioned

approximately

U12

and

associated

with a gain

PCB

SHEET

3.4:3.4.,

follows

101

filter

(or

can

the

filter

US.

and

cutoff

time

constant, a processor

capacitors.

the

ECG

be

driven

gain

of

the

processor

by 5 stages

32.

circuitry.

of

0.32.

Capacitor

1),

and

Power

notch

frequency

signal

into a railed

the

filter.

|

Reset

is

patient

temporarily

Line

occurs

contaminated

of

.

The

switching

is

set

Frequency

This

filter

0.5

Hz

under

condition.

module

and

brings.

active

two

filter

by

the

Sensing.)

removes

follows

control

the

following

by

patient
This
ECG

ECGZERO

filtering.

frequency

processor

the

input

occurs

front

The

poles.

the

switching

second

(ECGZERO)

conditions:

muscle

because

end

total

are

set

(NCLK)

to

remove

low-pass

con-

filters.

low

to

reset

at

is

if

of

An

offset

amplifier

digitize

output

by

3.4.3.3.

A

flip-flop
the
filtering.

A
the
detached
positive

reference

latching
signal

LEADOFF

mechanism
has

the

of

the

the

powerbase.

Detached

3-stage

detached

U3

input

ECG

voltage

flip-flop

is

been

circuit

to

signal

from

by

set

and

lost.

entire

generates

the

lead

and

(U12)

biases

waveform

offset

amplifier

Lead

composed

switched-capacitor

is

sensed

to

one

the

patient.

by

absolute

comparator

U3

through

high,

notifying

discovers

lights

(the

(ECG’)

Indicator

of

the

LEADOFF

as

of

the

If

the

value

U4. A voltage

NAND

the

that

an

LED

the

filtered

A:D

is

absolute-value

notch

.

follows:

supply

rails

signal

amplifier

gate

processor

itis

at a logic

on

the

ECG

converter

digitized

amplifier

flag.

The

filter

within

the

(+15

is

driven

U5.

in

excess

U10.

When

that a lead

high,

instrument

signal

can

only

by

the

circuit

examines

U6,

after

patient

V)

if

one

to

the

The

output

of

10 V drives

the

has

it

stops using

front

by

+5 V so

process

A:D

converter

U5,

voltage

it

has

module, a biasing

or

both

negative

of

flip-flop

come

panel

that

positive

and

.

comparator

the

condition

undergone

ECG

signal

supply

this

circuit

the

output

has

latched,
loose.
the

ECG

to

notify

the

the

analog

provided

one

resistor

rail,

is

of

When

R-wave

user

A:D

converter

signals).

as a data

U4,

of

the

stage

network

leads

becomes

it

is

converted

compared

U4

low,

the

LEADOFF

the

processor

as a gating

that

the

and

D-type

ECG

of

lowpass

to a 10

setting

ECG

can

The

output

signal

drives

to

a

V

and

logic

polls

signal

at

3-8

The

processor

ου

NAND

gate

clears

U10

is

the

flip-flop

provided

to

with

latch

CLRLO

the

flip-flop

after a high

during

brief

LEADOFF

signal

(intermittent)

has

been

lead-off

conditions.

recognized.

3.4.3.4,

The
sensed
signal
to

3.4.4,

The

The
unique

prior

large

3.4.4.1.

The

A)

Power

mains

by

AC,

set

notch

A:D/D:A

A:D/D:A

A:D/D:A

feature

to

A:D

DC

A:D

sequence

The

multiplexer

IR

Line

Frequency

power

AC

signal

one-volt-crossing

which

interrupts

filter

U6

to

the

Subsection

subsection

subsection

of

conversion.

levels

without

is

performs

the

design

This

slow-response

Conversion

of a typical

8088

processor

U24.

the

A:D

selects

Signals

demultiplexed

Sensing

going

into

comparator

the

processor

line

frequency,

shown

on

both

is

the

ability

allows

conversion

an

analog

available

the

power

U20.

at

automatically

SCHEMATIC

analog

to

subtract

for

accurate

AC

coupling.

routine

channel

for

conversion

and

filtered

supply

The

one-volt-crossing

the

frequency

adjusting

PROCESSOR

to

digital

and

variable

measurements

is

as

follows:

for

conversion

are:

IR

detector

board

of

the

digital

DC

channel

is

transformed

detector

AC

power

for

60

Hz

PCB

SHEET

to

analog

offsets

of

and

small

by

writing

signal

to

9.2

VRMS

produces

line.

This

or

50

Hz

4.

conversions.
post-amplify

modulation

to

levels

8-to-1

the

signal

power.

A

signals

on

analog

and
logic

is

used

B)

C)

RED’

ECG’

VCAL

VPS

ISEG

-

VREF

GROUND

Set

programmable

Set

desired

high

nybbie)

the

demultiplexed

the filtered

the

filtered

the

power

power

or

batteries

on

battery

a

voltage

bars

on

the

approximately

|

analog

ground

amplifier

analog

to

12-bit

offset

bus-compatible

ECG

waveform

voltage

supply

voltage,

and

power

level

from

display

10 V reference

potential

U30

value

and

filtered

from

to

the

during

gain

to

be

RED

the

calibration

used

to

check

the

display

driver

power-up

voltage

used

for

board

by

writing

subtracted

DAC

U43

detector

resistor

determine

battery

voltage

board,

test

used

alignment.

to

latch

U42.

at

U25,

(12

bits,

channel

within

whether

when

used

for

board

pin

2,

by

0-10

V).

signal

the

the

the

to

detect

alignment

writing

sensor

system

|

is

running

instrumentis

bad

segments

two

bytes

on

AC

operating

or

light

(low

byte,

3-9

D)

Nowa

Ts

U37,

amplified

1/8

E)

Triggering

conversion.

F)

The

G)

The
converter
this

H)

The
accomplished

to

pin

16.

scaled

analog

1,

(TP3).

The

by

programmable

the

sample

8088 processor

SAR

performs a binary

U43

which

comparison

SAR

is

polled

continues

in

approximately

value

offset

and

begins

is

compared

by

until

the least

is

present

voltage

amplifier

hold

line

at

the
has
U30

(S/H)

output

been

and

U37.

causes

subtracted

U36

executing a successive

search

the

sequence

to

the

held

processor

significant

100

us.

by

setting up a voltage

signal

via

buffer

bit

has

of

programmable

by

differential

The

total

range

to

hold

the

scaled

approximation

voltage

U41.

been

via

set.

Each

comparator

gain

amplifier

amplifier

of

programmable

voltage

routine

on

the

12-bit

conversion

(SAR).

D:A

U29.

stage

U25

for

|

The

and

gain

A:D

result

is

is

of

3.4.4.2,

The

amplifier

・

・

*

.

In
writing
written

routed
C43.

U11

3.4.

Most

"PROCESSOR

D:A

analog

U11

VIR,

which

VRED,

VOLUME,

RWTHRESHOLD,

operation,

to
with

to

one

When

until

the

S.

Timing

processor

Conversion

sample/hold

are

used

controls

which

controls

which

the

processor

DAC

U43.

address

of

the

U18

is

next

update.

and

Control

timing

PCB

circuits

to

update

the

IR

LED

the

red

controls

U18
lines

four

disabled,

and

SHEET 2 and

not

used.

sets

is

enabled

AO

outputs

control

the

through

the

formed

and

by

store

brightness

LED

brightness

speaker

up

an

analog

through

A2.

S1

through

capacitor

flags

are

3.

Processor

analog

the

following

volume.

voltage

U18,

When

U18

S4,

charging

voltage

generated

timing

demultiplexer

four

analog

—

on

‘analog

pin

3,

and

the

is

enabled,

storage

is

held

id

by

the

in

circuits

is

affected

U18

and

quad

signals:

demultiplexer
processor

the

voltage

capacitor

very

Shown

by

low

two

selects

at

C39, C41,

leakage

on

SCHEMATIC

types

operational

U18,

pin

9,

which

output

U18,

pin

9,

C42,

follower

of

logic

flags:

by

is

op

or

is

amp

-

一

-一

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Polled

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Processor

Many

of

3.4.5.1.

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SWITCH

U41

processor

interrupts,

these

flags

Polled

Processor

allows

indicates

I/O

are

the

signals

which

discussed

Flags

8088

processor

the

state

may

occur

elsewhere

to

of

the

front

asynchronously.

in

this

section

pol

the

following

panel

switch

3-10

and

logic

(logic

low

all

are

flags:

indicates

summarized

ON

position)

below.

LEADOFF

_

indicates

patient

that

an

module

ECG

was

lead

near

saturation

has

become

level

detached,

and

as a result

that

the

ECG

signal

from

the

LEDLOW

DACMP

Four

jumpers

diagnostic

3.4.5.2.

AC

LEDHI

INAMPHI

TxRDY

Interrupt

:

RxRDY

INT

3.5.

FRONT

indicates

the

output

W2,

W3,

modes.

Processor

interrupts

©

instructs
light

to

indicates

the

INAMP

signals

signals

real-time

PANEL

that

of

W4,

the

processor

the

processor

avoid

SAT

that

the

stage

that

UART

that

UART

interrupt

DISPLAY.

LED

drive

voltage

WS,

which

Flags

signal

INAMP
to

lower

U16

U16

from

currents

comparator

are

selectively

at

the

frequency

to

decrease

saturation

gain

is

set

the

signal

is

ready

to

has

received a new

interrupt

controller

때

should

U29,

transmit

the

LED

too

level

be

used

installed

of

high.

to

U22

increased

in

SAR

A:D

to

place

the

AC

power

drive

currents

The

processor

avoid

saturation

another

character

character

-

to

increase

conversion

the

processor

line

-

in

the

then

SAT

S/N

in

presence

reduces

ratio

various

of

ambient

the

gain

of

Front

panel

display

・

Driver

PCB,

- — Display

3.5.1.

The

driver

following

During
driver

Two

different

。

digitand

e

drivers
“AUDIO

PCB,

Driver

circuit

discussion.

power-up,

board.

for

ALARM

is

accomplished

which

contains

which

contains

PCB

board

is

CR2,

R10,

This

reset

pulse

mechanisms

bargraph

the

drivers

lightbars

OFF.”

shown

and

clears

are

used

drive

the

on

C11

used

with

by

two

circuit

boards:

circuitry

display

SCHEMATIC

provide a short-duration

all

to

drive

other

for

the

LEDs

and

DRIVER

front-panel

front-panel

the

display:

display

display

pushbuttons.

PCB.

elements.

indicators

LEDs

reset

Refer

pulse

such

to

this

as

“PULSE

schematic

to

all

latches

SEARCH”

in

on

the

the

and

3-11

The

phase.

relationship

the

counter,

commands).

To

detect a change

counter's

the

processor generates a signal

depending

output

and

in

the

adds

between
on

which

U/D

counter,

it

to

the

two

way

the

the

its

accumulated

into

the

channels

knob

is

processor

turns

LOAD

line

provides

turned

(clockwise

reads

count.

of

US

an

UP

or

DOWN

rotation

the

twos-complement

After

it

accumulates

to

clear

it

for

the

count

results

value

the

next

count

command
in

count-

of

counter

value.

to

“up

the

value,

3.5.1.4,

‘Differential

the
the
signal

the

segment.

3.5.1.5.

The

U11) controls

(SCHEMATIC
or
the
capacitor
supplies a current

3.5.2.

The

LEDs,
current

Power-Up

amplifier
voltage
driver

power-up

ICs.

¡SEG

across

(PROCESSOR

Speaker

sample/hold

disconnect

pitch

of

the

C6.

Display

display.

circuit

the

LED

limiting

The

display

the

PROCESSOR

the

sound

Diode

PCB

indicator

and

Display

U7

senses
resistor
voltage

Driver

VOLUME

amount

SPEAKER(-)

boost

board

pull-up

R9.

is

test

to

Circult

signal

of

produced.

CR1

suppresses

for

is

located

lamps,

resistors.

Element

the

power

The

sensed

amplified

PCB

SHEET

determine

from

current

the

PCB

SHEET

lead

The

U7

operational

immediately

the

going

from

control

Test

return

line

voltage

with a gain

4,

U24).

whether

the

processor

into

1,

ground.

harsh-sounding

transients

buttons

is
of
The

any

display

the

speaker's

U38

and

The

from

amplifier.

behind

and

of

driver

ICs

proportional

10

and

is

provided

processor

element

(SCHEMATIC

SPEAKER(+)

U9)

switches

frequency

square

the

inductive

the

the

of

wave

front

panel

control.

U8,

U9,

and

to

the

current

to

the

digitizes

the

of

speaker

knob;

ISEG

has a shorted

PROCESSOR

lead.

FET

Q2

TONE

TONE

load.

and

contains

as

well

U11

by

flowing

A:D

converter

and

uses

or

open

PCB

The

TONE

to

alternately

signal

determines

is

softened

Transistor

the

as

associated

monitoring

through

as

it

during

LED.

SHEET

by

numeric

4,

signal

connect

filter

O1

-

3.6.

The

The

The

Pulse

_

supply.
pulse
power
current

rise

Also
optical

POWER

power

supply

power

supply

supplies

width

modulator

The

PWMs

width

at

and

a 5 V reference

drive

and

fall

times.

resident

link,

formed

SUPPLY

circuitry

board

are

capable

the

gates

to

the

on

the

PCB

is

contains

of

(PWM)

sense

the

of

switching

to

somewhat

power

supply

by

diode

shown

providing 2 A

DS1

on

the

two

switching

U2 controls

DC

output

FETs

the

two.

PWMs.

capacitive

board

and

phototransistor

SCHEMATIC

power

at

+5

V,

the

+5

voltages

Q2/Q4

Schmitt

gates

of

is

one

half

3-13

POWER

supplies

100

mA

V-

supply;

through

and

Q3.

inverters

the

FET

(monitor

O1.

SUPPLY

in

flyback

at

+18

V,

PWM

U4

their

INV

Voltage

switching

U3

side)

regulator

provide

of

PCB

converter

and

100

mA

controls

(pin

transistors,

the

the

1)

inputs

VR1

low

impedance

powerbase-

drawing.

configuration.

at

-18

V.

+18/-18

and

provides

minimizing

V

control

5W
active

drain

-monitor

the

3.7.

BATTERY

The

battery

battery

“+

*

3.7.1.

The

The
provides a logic
buffer.
change

dure.

impedance
mode
or

Inthe

“to

charger

-“ON/STDBY

Battery

ON/STDBY

ON/STDBY

ON/STDBY

(U41

in

switch

The

ON

is

activated

the

rectified

following

STDBY,

CHARGER

charger

PCB

control

charger

circuitry

Control

control

switch

control

on

SCHEMATIC

position

mode

connection

by

and

filtered

sections, | the

and

then

as

PCB

PCB

is

shown

contains

circuitry

Circult

circuit

J1

is

shown

signal

PROCESSOR

from

is

activated

between

cutting

off

AC

the

instrument

on

two

major

is

shown

in

(SWITCH)

ON

to

by

bringing

power

Q1.

Power

voltage

circuit

is

the

SCHEMATIC

circuits:

on

the

the

ON

that

PCB

STDBY

through

the

supply

supply

from

the

examined

is

returned

bottom

position.

is

ground

powerbase,

polled

SHEET

this

gate

of

(labeled

voltage,

as

the

to

the

portion

by

BATTERY

of

It

does

not

the

main

4).

When

signal,

FET

switch

“P")

VPS,

depending

ON/STDBY

ON

state.

CHARGER

the

schematic.

switch

processor
the

processor

it

executes a shutdown

Q1

high,

and

signal

may

be

on

switch

PCB

power.

Rather,

through a tri-state

senses

which

ground.

either

the

battery

the

mode

is

moved

drawing.

The

it

a

proce-

provides a low

STDBY

voltage’

of

operation.

first

from

ON

State

3.7.1.1.

In

timer

U1

power

The

line
edge
pin 3 periodically

tions

placed

3.7.1.2.

The

‘response

Placing
occurs,
executes
capacitor
Cleared.
STDBY

ON

the

ON

state,

that

ensures processor

will

go

low,

flip-flop

and

signal

processor

(PSEN)

producing a narrow

on

in

ON

J1

or

keeps

at

léast

PSEN,

ON

to

The

state.

not

the

STDBY

to

STDBY

STDBY

to a decline

in

the.STDBY

if

battery

an

infinite

C2

is

not

resulting

capacitor

U2

grounds

C2

from

once

every

positive-going

discharges

static

highs

state

transition

in

battery

position

voltage

loop

routine

discharged,

logic

C2is

discharged.

control

will

be

will

be

recharging

C2

or

if

an

can

falls

U1,

low

at

over

cleared,

broken.

150

through

lows,

ms.

the

The

pulse

diode

have

abnormal

occur

either

voltage

below
that

below

causes.

5.6

does

pin

9,

U2,

pin

|

The

instrument

gate

by

placing a negative

pulse

on

an

condition

by

approximately

the

voltage

V,

the

not

involve

voltage

5,

shuts

|

combination

power.

of

Q1

is

AC-coupled

U1,

pins 1 and

CR4.

Capacitor

affect

on

“hangs”

placing

on

the

processor.

pulsing

rises,

U1,

off

FET

.

i.

of

If

C2

will

go

the

watchdog

the

switch

5.6

polled

blanks

PSEN.

pin

Q1,

placing

R5

and

C2

is

allowed

low,

and

the

pulse

on

the

through

2.

The

C1

ensures

capacitor

resulting

that

timer.

processor.

J1

in

position 1 (STDBY),

V.

SWITCH

the

front-panel

As a result,

8,

voltage

falls,

the

instrument

forms a watchdog.

to

recharge,

connection

power

low

only

The

supply

C1,

pulse

active

N-200

pin 8 of

between

enable

its

rising

on

transi-

is

thus

.

orin

signal

to

rise.

If

this

displays

watchdog

and

flip-flop

in

and

timer.

U2

the

U1,

is

3-14

3.5.1.1.

Digit

and

Bargraph

Drivers

ES

A

total

of 8 components

BARGRAPH

Latch

U12

driver

U11

3.5.1.2.

The

lightbars

|

the

following

DP

ALMINH

NG

PLSSRCHLO

PLSSRCHHI

LOWSAT

U2

and

0

and

and

decoder

determine

Lightbar

are

signals:

fights

‘not

with

—

with

lights

US

drive

comprise

BARGRAPH

Ú13

which

Drivers.

driven

lights

connected

the

by

decimal

AUDIO

PLSSRCHHI,

PLSSRCHLO,

LOW

remaining

the

1).

are

used

segments

latch

circuitry

point

ALARM

lights

SAT

lightbar.

lightbars

digit

The

drive

io

select

within

and

in

the

OFF

PULSE

lights

PULSE

with

and

bargraph

signals

which

the

selected

are

not

7-segment

lightbar

SEARCH

SEARCH

the

following

displays

for

these

digit

or

digit

multiplexed.

digital

signals:

(DIGIT 0 through

displays

bargraph

or

bargraph

U3

displays

lightbar

lightbar

are

to

and

|

DIGIT

multiplexed.

update.

are

U8

Latch

illuminated.

drive

lightbars

5,

-

U10

and

with

HISAT

LOWRATE

©

HIRATE

BATLO

BATON

ECGLOST

ECGON

Decoder

_

from

3.5.1.3.

Decoder
BUTTON 0 through
(U/D)

The
90
inverters
provides

U6

the

processor

Front

U6

counter

control

degrees

U4

the

takes

Panel

also

US.

knob

out

are

clocking

lights

HIGH

lights

LOW

lights

HIGH

lights

LOW

lights

BATT

lights

ECG

lights

ECG

the

select

(A0,

A1,

Controls

lets

the

processor

BUTTON 4 and

consists

of

phase

to

used

to

clean

pulse

SAT

lightbar

RATE

RATE

BATT

IN

USE

LOST

IN

USE

line

from

and

A2)

of a two

each

other,

up

for

U/D

lightbar

lightbar

lightbar

lightbar

lightbar

lightbar

the

processor

and

uses

select

octal-buffer

control

channel

the

counter

knob

optical

and a dual

signals

from

U5;

(DISPLAY)

them

to

select a latch

Ut,

which

rotation

Channel B provides

information

chopper,
channel

the

knob,

with

optical

one

and

the

for

display

reads

the

relayed

the

two

slot

detector.

inverter

the

direction

three

low

updating.

state

of

through

channels

Schmitt

per

channel.

address

inputs

mechanically

(U/D)

lines

UP/DOWN

trigger

Channel

signal.

A

3-12

3.7. 1 .3.

With

the

signal

is

diode

CR8.

In

STDBY,

STDBY

front
maintained

State

panel

Zeners

capacitor

switch

at

logic

CR1

and

C2

is

in

the

STDBY

high.

SWITCH

CR3

charged

state,

perform

to 5 V

VPS

voltage-is

similar

through

functions

resistor

charges

clamped

elsewhere

R5.

capacitor

to

logic

levels

in

C5,

the

and

the

by

protection

circuit.

SWITCH

zener

3.7.1.4.

When

the

tary

positive

logic

low,

flip-flop

Positive

ground.

logic

‘

cally

3.7.1.5.

Micropower
and

Total

is

high,

discharge

ON/STDBY

current

3.7.1.6.

A

time

delay

©

ground
the
enough

PCB,

potential

switch

SHEET

STDBY

discharging

gate

As

Voltage

Power-On

to

to

ON

Siate

switch

set,

is

moved

voltage

voltage

the

and

voltage

drain

provided

from
generate a reliable

pulse

U2,

pin

switched

C2

(the

C2

to

Regulator

regulator

sensing

for

Time

on

occasions

ON

to

1,

power-up

capacitor

5,

goes

on

Q1

voltage

watchdog

maintain

circuitry

the

Delay

by

CR2,

STDBY

to

the

ON

position,

to

Schmitt

to

creates a low-resistance

U3

circuits

power-up

reset

NAND

C2

through

logic

high,

pulse

from

timer)

the

instrument

provides 5 V
is

always

on

this

R6,

and

when

the

and

back

circuit

R1,

C5 5 discharges

gate
diode
placing

C5

begins

in

power

on

as

board

is

C3

at

the

switch

to

ON

might

reset

pulse

CR1,

discharges

recharging.

the

is

through

U1,

pins 4 and

CRS,

and

setting

positive

ON

long
approximately

gate

cycled

to

and

path

between

state.

to

the

as

the

of

Q1

rapidly.

not

allow

the

processor

C19).

voltage

through

The

battery

battery

allows

R7

5. In

response,

D-type

on

the

signal

R7,

processor

charger

maintains

40

pA.

the

Without

the

power

(SCHEMATIC

and

provides a momen-

U1,
flip-flop
gate

of

FET

ground

U1,

again

power

this

supply

and

pin

6,

returns

begins

PCB.

Battery

sufficient

supplies

time

delay,

voltage

pin

6,

falls

U2.

When

switch

power

to

to

periodi-

charger

voltage.

to

return
cycling
to

fall

PROCESSOR

to

the

Q1.

a

to

far

3.7.2.

Battery

Battery

“AC

secondary
positive
through

potentiometer

Diode
With

3.8.

The
mother

charger

power

VCB+

windings.
voltage
Q2

CR9

AC

power

POWERBASE

powerbase

PCB

Charger

circuitry

and

VCB-

It

for

voltage

and

Q3,

cutting

R12

adjusts

prevents

and

back-discharge

disconnected,

contains

three

Circuit

is

shown

(12.5

is

rectified

regulator

output

the

nominal

battery

electronics

daughter

in

the

VRMS)

through

VR1.

voltage

through

voltage

for

PCBs.

upper

part

is

taken

diode

bridge

Current

when

current

battery

data

charging

the

regulating

can

communications

3-15

of

the

from

one

CR6

sensing

vary

between

schematic.

of

the

and

filtered

resistor

draw

increases

voltage

to

circuit

6.6 V and

for

the

power

supply

by

R15

provides

above

7.2 V at

when

AC

N-200.

transformer

C7

to

250

TPS.

power

5.6

V.

It

is

composed

provide

current

mA.

Trimmer

is

removed.

a

limiting

of

a

“3.8.1.

Mother

The

mother

The

mother
charges
regulator
to

+5

V.

PCB

board

board

filter

capacitor

U3

and

is

shown

provides

C1.

current

inthe

power

The

AC

booster

SCHEMATIC

for

the

rest

voltage

Qi

form a linear

MOTHER

of

the

supplied

regulator

PCB

powerbase

at

AC(+)

is

that

POWERBASE.

electronics.

typically

lowers

.

7.5 V RMS.

the

rectified

Bridge

rectifier

Voltage

AC

U2

voltage

Portions

these

voltages

the

RS232

Diode

CR1

optical

3.8.2.

The

3.8.2.1.

In

timer

signal

watchdog

circuit

Addresses
(U5,

U3

Addresses

Butfer

link.

Upper

upper

the

upper

comprised

from

CR2,

pin

is

mapped

U1

of

the

serial

and

and

and

Upper

daughter

U5,

timer

R9,

presented

30)

pulses

starting

are

reads

powerbase
from

port.

phototransistor

Lower

lower

Daughter

of

U6,

pin

4.

sets

and

high.

decoded

several

analog

the

+5 V supply.

Daughter

daughter

PCB

PCB,

8085

C7,

CR1,

If

SOD

the trap

C10

provides

on

the

16-kbyte

at

HEX

on

the

digital

does

pin

multiplexed

circuitry

U4

Q2

form

PCBs

PCBs

comprise

processor

R5,

Q1,

not

(U5,

pin

reset

EPROM

4000.

I/O

lower

daughter

signals:

require

and

one

R6,

produce a positive

6)

on

address/data

for

U5

regulate

half

the

U5

is

and

which

power

U4

is

the

upper

PCB.

(powerbase

mapped

+15 V power.

these

digital

portion

driven

by a 6.144

C8

monitors

pulse

causes

up.

bus

daughter

DC:DC

voltages

side)

of

the

within

the

8085

of

U5

are

starting

at

PCB

converter

down

to

of

the

powerbase-monitor

the

powerbase

MHz

crystal. A watchdog

Serial

Output

any

100

ms

to

reset

to

address

held

by

latch

address

is

0,

memory-mapped.

Ui

derives

+12 V for

electronics.

Data

(SOD)

period,

0.

Delay

U2

when

and

8-kbyte

use

the

ALE

RAM

in

*

Four

—S1

—S3

—S4

ㆍ

Jumpers

*

SCALE,

POWERBASE),

+

ECGTRIG,
(SCHEMATIC

switches

and

S2

(ZERO

(TREND)

(EVENT)

W1

and

which

which

S1

through

initiates a TREND

initiates

We,

is

the

sets

is

MIDDLE

S4:

and

FULL)

an

EVENT

which,

output

generated

the

SAT

DAUGHTER

of

set

printout

when

switch

analog

with

zero

and

printout

installed,

SW1

output

every

PCB

place

(SCHEMATIC

range

R-wave

POWERBASE,

3-16

full-scale

the

(0-1

when

on

system

00%

all

analog

MIDDLE

or

an

external

U7,

outputs

in

various

DAUGHTER

50-100%)

ECG

pin

7).

diagnostic

PCB

monitor

is

modes

used

3.8.2.2.

U6

8000.

Timer
rates

19.2
receiving
SCHEMATIC

U5,

logic

UART
performs
returned

(pins

Buffer

format.

and

U7

circuit

for

kbaud.

pin

23

high

U2

13

U1

Lower

UARTs

to

and

provide

U4

Circuit

on

the

MOTHER

(RTS)

on

U8,

drives

the

voltage

the

17).

reads

Daughter

address

generates

U2

and

elements

optical

the

main

8-bit

communication

is

set

low

pin

11

external

level

processor

DIP

PCB

decoding

the

real-time

U5.

U5

drives

associated

PCB

POWERBASE

in

software

(ALMOUT).

RS232

shift

required
as

switch

S1,

for

all

interrupt

the

with

link.

when

interface

for

RST5.5.

'

which

devices

RST7.5

powerbase

US

provide

The

link's

drawing.

the

instrument

and

the

the

TTL-RS232

Baud

rates

is

used

to

in

the

powerbase.

(U4,

pin

side

of

the

signal

LED

and

is

in

fiber-optic

interface.

for

both

select

the

I/O

functions

10).

U4

also

produces

monitor-powerbase

conditioning

phototransistor

an

alarm

output

UARTs

baud

for

transmitting
are

condition,

CR1.

Level

RxRDY

rate

are

and

(U2,

derived

data

begin

at

HEX

the

baud

optical

shown

and

on

link

the

producing

translator

pin 14)

from

transmission

is

timer

at

a

U3

U4

Connector

3.8.3.

The
contains

be

divided

・

the

*

the

3.8.3.1.

Bus-compatible
negative

+10.00 + 0.02 V when

'

voltage).

„voltage

U4

is a 1-to-8
selected
storage
at

the

1

kohm

J8

Middle

middle

upper

daughter

all

of

into

sample/hold

ECG

daughter

Sample/Hold

voltage

Switch

divider

output:

capacitors

outputs

output

is a 9-pin

Daughter

the

two

input

8-bit

regulator

SW1

formed

bus-compatible

U4

of

the

resistors

miniature D type

PCB.

board

(shown

analog

circuitry

portions:

circuit,

circuit

board

pin

C4

sample/hold

with

with

whenever

Circuit:

DAC

U5
U6.

DAC

gain

selects a full

by

R2,

5, 6,

through

quell

self-adjusting

is

R5,

analog

7,

oscillations

for

the

on

SCHEMATIC

for

the

powerbase.

its

associated

threshold.

an

external

provided

Potentiometer

is

and

or

8.

C7

and

amplifiers

with a reference

set

to

maximum

scale

analog

R6.

demultiplexer.

Each

output

FET-input

protect

which

RS232

data

|

MIDDLE

For

purposes

DAC

and

analog

This

ECG

signal

voltage

R11

trims

the

(the

U1-U5

output

may

voltage

DAC

output
drives a separate
operational

against

occur

when

link.

DAUGHTER

of

discussion,

demultiplexer.

circuit

triggers

appears

of

approximately

output

external

voltage

combination

of

1Vor10V

at

U4,
sample/hold

amplifiers

short-lived

driving

PCB

Processor

of

U1,

inverts

by

pin

9,

feeds

U2

and

highly

POWERBASE).

the

board

U5

onthe

-10 V by

pin

6,

to

the

reference

switching i in

through

circuit

made

U3.

Zener

transients.

capacitive

loads.

can

the

to

the

up

of
diodes
The

3~17

3.8.3.2.

The

output

buffers
incoming

ECG

ECG

signal

the

Output:

sample/hold

is

AC

coupled

output

ECG

of

the

signals

channel

unity-gain

are

is

(at a corner

AC

coupled

i

bidirectional.

frequency

buffer

through

when

It

signals
C16

differs

from

of

0.5
enter

and

Hz)

R25

the

other

to

unity-gain

the

ECG

to

two

parallel

three

channels

buffer

U2.

bidirectional

circuits:

port

in

that

the

Resistor

(J3).

R12

s © unity-gain

e a peak

the

The

peak
Voltage
exceeds

follower

peak

value

follower

comparator

the

adjustable

buffer

circuit

of

circuit

U7

U3

(composed

the

R-wave

provides
produces a positive
threshold

of

from

an

adjustable

determined

U2,

one

CRY,

peak

to'the

threshold

voltage

by

previous

C17,

pulse

R27,

and

next.

for

sensing
(ECGTRIG)
peak

U3)

R-wave

with

siow

each

ECG

when

values.

the

decay

R-wave

ECG

that

peak.

input

stores

signal

3-18

cm

^,

12
foo

?

ys

leg

る
/

S

qe

Sf

SECTION

4

2

TROUBLESHOOTING

This

section

resolving

following

disassembly.
are

not

NOTE:

NOTE:

4.1.

INITIAL

1.

The

ㆍ

first

them

that

these

suggestions,

Refer

available,

Instrument

To

reset

TROUBLESHOOTING

instrument

The

AC

power

the

problem

qualified

2.

The

instrument

。

The

battery

|

ㆍ

The

battery

|

personnel

AND

discusses

do

not require

if

necessary

contact

must

be

the

powerbase

does

is

not

persists,

service

personnel

operates

is

discharged.

pack

or

Nellcor's

ASSEMBLY

some

proceed

to

Nellcor’s

operating

microprocessor,

not

turn

connected

check

on

AC

is

defective

Technical

GUIDE

potential

difficulties,

disassembly

to

the

subsections

Section

5,

Technical

on

AC

power

PROCEDURES

on.

and

the

the

AC

fuse.

or

Nelicor's

power

Fourteen

or

but

the

hours

battery

Service

of

the

Testing

Service

and
Department

for

disconnect

battery

If

this

Technical

not

on

the

are

fuse

Department.

their

possible

instrument.

on

detailed

Calibration.

the

powerbase

and

reconnect

is

discharged.

does

not

resolve

Service

Department.

battery.

required

is

to

open.

completely

Contact

causes,

If

the

and

difficulty

troubleshooting

If

qualified

at

1-800—NELLCOR.

to

be

functional.

AC

power.

Connect

the

to

problem,

recharge

qualified

suggestions

persists

after

and

service

AC

personnel

power.

contact

the

service

for

If

battery.

3.

4.

・

The
Services

The

instrument

・

The

ㆍ

The
connected,

AC

+ - The

The

instrument

*

“Err

・

“Err

・

“Err

battery

charger

Department.

operates

powerbase

instrument

power,

AC

fuse

or

or

is

try

on

is

disconnected

is

not

connected

another

the

rear

displays

1”

indicates

2”

indicates

3"

indicates a damaged

defective

defective

is

defective.

on

AC

power,

receiving

to a defective

AC

panel

an

error

RAM

ROM

display

Contact

but

from

AC

power

outlet.

is

defective.

message.

(data

(program

or

qualified

É

the

BATT

the

monitor.

because
AC

outlet.

Replace

memory).

memory).

indicator.

service

IN

USE

the

Replace

the

See

Section

See

See

personnel

indicator

power

cord

the

fuse

(see

3.4.1.1.

Section

Sections

is

is

power

Section

3.4.1.1.

4.3.4.

or

Nellcor's

|

always

on.

defective,

cord,

connect

4.4.1.).

and

3.5.1.4.

Technical

is

not

to

4-1

WARNING:

However,
indicators

only

If

the

5.

Perfusion

and

pulse

The
correct

The

The

Instrument

because

may

be

defective

indicator

rate

are

sensor

if

necessary.

patient's

at

least

one

Incorrect.

segment(s)

is

not

not

displayed.

is

improperly

perfusion

will

operate

segment

Continue

has

tracking pulse

applied

is

too

been

to

poor

lf

to

for

any

button

or

indicator

use

the

Instrument

Identified.

(PULSE

the

the

SEARCH

patient

instrument

or

Is

Is

itis

pressed

missing,

only

indicator

not

plugged

to

detect

while

the

display

in

an

is

on)

in.

an

acceptable

“Err

urgent

and

‘Check

3"

is

showing.

or

warning

situation

saturation

and

pulse.

and

6.

Perfusion

display.

Check

—use

C-LOCK

—test

the

—try

the

The

sensor

The

patient

is

available,

Module),

NOTE:
C-20C/D)
is

The

The

pulse

The

being

amplitude

sensor

patient's

rate

the

condition

ECG

instrument

nasal

OXISENSOR™

is

damaged.

module

or

replacement

3.4.2

(Analog

patient

may

be

provided

indicator

is

damaged

perfusion

(fewer

of

the

patient.

synchronization.

on

yourself

Replace

is

damaged.

does

Front

End

module

used

via.the.

than

from a NELLCOR

if

R-wave

rear

pane!

tracks a pulse

(red

LED).

is

too

low

three

or

four

or

another

R-15.

with

Try

another

not

and

synchronization

connector.

Replace

to

allow

bars

patient.

another

resolve

LED

Current

but

there

with

the

on

the

patient

the

instrument

|

sensor,

module.

problem,

Drive),

N-100

pulse

is

not

is

no

another

perfusion

If

no

refer

to

and

5.4

oximeter

being

used

oxygen

to

saturation

sensor.

measure

display).

spare

patient

Sections.3.3

(Processor

(model

or

saturation

if

the

C-13C/D

ECG

or

pulse

-

module

(Patient

PCB

Tests).

or

signal

rate

and

—<heck

—use

—test

—try

Excessive
pulse

—use

—set

M

the

condition

C-LOCK

the

instrument

the

nasal

patient

pattern.

C-LOCK

the

N-200

of

the

ECG

synchronization.

on

yourself

OXISENSOR

motion

ECG

for

is

synchronization

Mode 3 3

patient.

or

another

R-15.

making

it

(refer

to

Operator 5 Manual).

patient.

difficult

for

4-2

the

instrument

to

find

the

actual

o

7.

Patient

module

cannot

be

connected

to

the

instrument.

pa

8.

Incorrect
patient
or

if it

is

The

connector

“(the

plug

Saturation

erratic.

Excessive

—use

—if

possible,

—check

—use a type

—move

—use

type

of

module

being

and/or

C-LOCK

whether

the

Mode 3 if

(or a C-13

provided

pins

is

internally

pulse

patient

ECG

ask

of

sensor

sensor

patient

the

appropriate.

module

C/D

via

the

are

bent.

Straighten

sealed

rate

motion

synchronization,

the

patient

sensor

10 8 site

display

is

making

that

tolerates

with

and

to

is

(Refer

is

being

or

C-20

rear

panel

should

are

changing

|

it

difficult

or

remain

securely

more

less

movement,

to

used.

Use a NELLCOR

C/D

patient

connector).

them

carefully

not

be

rapidly

for

still,

or

applied

patient

the

N-200

module

disassembled).

the

and

motion,

if

ECG

or

replace

and

pulse

instrument

replace

or

it

if

or

operators

manual.)

C-200-13

input

is

the

patient

amplitude

to

find a pulse

necessary,

or

C-200-20

not

required

module

indicator

pattern.

or

is

9.

An

electrocautery

—the

far

apart

—the

different

—the

on

battery,

—the

—use

interference.

Ambient

light

with

The

ECG

Check

The

ECG

ECU

cable
as

sensor

site

ECU

and

sensor

an

OXISENSOR

light

opaque

LOST

the

condition

electrode

unit

(ECU)

and

N-200

possible...

is

too

close

if

possible.

N-200

are

or

plug

it

into a different

is

damp

or

D-25,

may

be

interfering

material.

indicator

is

of

the

or

electrode

is

intertering

patient

to

the

ground

plugged

has

been

reused

into a common

which

with

displayed.

patient.

cable

with

module

pad

AC

outlet.

too

has

added

the

sensor.

is

loose

pertormance.

are

too

close

or

electrocautery

power

often.

Replace

insulation

.

Shield

or

the

unplugged.

to

each

site.

source.

it

with a new

against

sensor

Check

other.

Move

them

Move

sensor

Operate

to

the

N-200

sensor.

a

electrosurgical

from

bright

ambient

connections.

as

If

the

tive.

Try

ECG

another

signal

patient

is

supplied

via

module.

the

If

that

patient

is

not

4-3

module,

possible,

the

patient

see

module

Sections

may

3.3.,

be

defec-

3.4.3.,

and

5.4.

10.

If

the

monitor

AC
ECG

When

The

ECG

signal

may

power

to

signal

ECG

is

patient's

is

provided

be

incorrect.

the

powerbase

is

being

supplied

connected,

perfusion

via

Use 1 V/mV

may

via

pulse

rate

may

be

the

rear

panel

ECG

have

been

the

rear

panel

is

displayed

inadequate.

connector,

analog

interrupted

output

connector).

but

saturation

the

or

(this

input

signal

defib

sync

applies

is

not.

pulse

only

from

if

the

the

wave.

ECG

11.

—check

test

—try

The

pulse

Excessive

—use

-if

possible,

—check

—use a type

—move

—use

The

patient

another

the

condition

the

instrument

the

nasal

rate

displayed

patient

C-LOCK

ask

whether

of

the

sensor

Mode 3 if

has a pronounced

sensor

of

the

patient.

on

yourself

OXISENSOR

by

motion

ECG

synchronization,

the

patient

the

sensor

sensor

to a site

appropriate

site.

the

is

making

that

tolerates

with

R-15.

N-200

to

is

(refer

or

another

does

it

difficult

or

remain

securely

dicrotic

less

to

still,

more

movement,

the

notch,

patient.

not

correlate

for

or

applied

patient

N-200

which c causes

with

the

instrument

|

and

replace

motion,

or

Operator’s

or

that

of

the

to

find a pulse

it

Lit

necessary,

Manual).

the

pulse

ECG

rate

monitor.

pattern.

or

to

double.

Try

12.

An

An

Oxygen

blood

The

PaCO2,
reliable

—check

artifact

electrocautery

gas

more

is

present

saturation

determination.

calculation

2,3-DPG,

as

to

information,

measurement

has

correlative

see

that

on

the

unit

is

interfering

not

been

or

fetal

hemoglobin.

measurements.

the

calculations

see

Section.

ECG

monitor.

(refer

does

not

correctly

have

3. 1 4.

Refer

to

item

correlate

adjusted

In

general,

been

corrected

to

the

manual

number

with

for

calculated

the

the

8).

effects

for

value

calculated

of

saturation

for

relevant

that

monitor.

pH,

temperature

values

variables.

from

a

are

For

not

13.

Accuracy
dysfunctional
venous
extremity
ali

instructions,

directions

The

oxygen

measured

can

be

affected

hemoglobins,

pulsations,

that

for

saturation

by a laboratory

electrosurgical

has a blood

warnings,

sensor

use.

measurement

by

incorrect

intravascular

interference,

pressure

and

cautions

of

CO-Oximeter.

sensor

cuff,

arterial

in

the

N-200

application

dyes,

bright

and

catheter,

the

N-200

does

or

use,

significant

light,

excessive

placement

Operator’ s Manual

not

of a sensor

or

intravascular

correlate

with a value

levels

patient

on

line.

andi

in

of

movement,

an

Observe

the

14.

Fractional

the

comparison

measures

GO-Oximeter

menis

used

Manual.

The

OXYGEN

Excessive

dislodged,

—check

The

ECG

—check

if

the

become
the

bedside

—check

measurements

functional

must

be

to

make

SATURATION

patient
or

the

position

cable

the

connection,

ECG

signal

dislodged

monitor.

the

connection.

have

was

made.
saturation.

and

Corning

converted

this

conversion

motion

disconnected

has

is

from

to

has

of

the.

come

coming

the

display

loose

not

been

The

NELLCOR

Multi-wavelength

oximeters,

functional

can

caused

from

electrodes

from a bedside

ECG

be

is

the

from

IN/OUT

measure

measurements

found

erratic

the

ECG

and

the

converted

N-200,

oximeters,

fractional

in

Section

and

the

ECG

electrodes

cable:

check

the

patient

module

|

ECG

monitor,

connector

to

functional

like

other

two-wavelength

such

saturation.

for

comparison.

VI

of

the

ECG

LOST

to

become

connections.

connector.

the

on

the

rear

measurements

as

the

Fractional

The

N-200

display

ECG

of

input

the

Operator's

is

displaced,

N-200,

before

oximeters,

[L282

measure-

equation

flashing.

cable

may

or

from

have

15.

16.

Trend

Trend

and event

The

memory

The

trend

or

event

Switch

—check

Cables

—

Check

data

back-up

and

event

data

settings

the

switch

are

improperly

the

cable

are

not

battery

memory

cannot

are

be

incorrect.

settings

connected.

connections.

available.

has

been

has

been

printed.

(see

N-200

discharged.

erased.

|

Operator’s

Manual).

17.

The

NELLCOR

N-9000

recorder/interface

cannot

be

used.

m“

。

The

—check

4.2.

DETAILED

4.2.1.

Fallure

Instrument

ㆍ

An
incorrect
guide

‘

specific

« . The

ance

they
cautery
sensor
procedures
the

WARNING:
power
service

failures

outright

to

second,

of

the

can

or

by

problem.

applied

personnel

switch

settings

the

switch

TROUBLESHOOTING

Modes

can

failure

operation

diagnosing

module

also

“Bovie”

the.user.

The

of a component

or

can

more

difficult,

instrument.

be

caused

interference),

If

ouilined

procedures

and

the

and

are

settings

be

broadly

no

operation

these

failures.

then

be

problem

While

in

an

instrument

in

Section

In
cover
adequate

incorrect.

(see

PROCEDURES

divided

in

at

Subsequent

used

to

deals

these

problems

some

cases

an

improperly

is

5,

Testing

this

section

removed.

precaution

|

N-200

into

two

one

of

the

all.

Use

correct

the

with

by

noise

suspected

and

require

These

must

Operator's

Manual).

classes.

instrument

the

Troubleshooting

sections

diagnosed

intermittent,

may

in

functioning

of

Calibration,

tests

dealing

also

be

the

environment

having

tests

and

should

be

taken

modules

problem.

noisy,

related

sensor

substandard

should

only

against

will

Summary

with

repairs

or

out-of-spec

to a component

(such

or

misapplication

be

followed

adjustments

be

made

electrical

cause

consistently

below

as

to

each

pertorm-

failure,

as

electro-

of

performance,

to

help

made

with

by

qualified

shock.

a

the
the

diagnose

the

TN

WARNING:

accuracy
performed

4.2.2.

4.2.2.1.

Symptom

1. - INSTRUMENT
OPERATIVE

Adjustment

of

the

Instrument.

as

described

Troubleshooting

Monitor

COMPLETELY

(AC

procedures

To

using

Summary

or

battery).

described

Insure

only

test

IN-

In

continued

equipment

Probable

.

A.

B.

ㆍ

C.

D.

-

E.

this

section

accuracy,

specified

Diagnosis

Blown

AC

Refer

to

Section

Blown

AC

Sections

Failure

charger

and
Power

Sections
Logic
Sections

of

board.

3.7.
supply

failure

5.4

could

the

procedures

In

fuse

and

battery

4.4.1
the

switching

failure.

5.3.1
on

and

affect

this

and

4.4.1.

and

4.3.5.

Refer

and

3.6.

the

3.4.

the

must

section.

battery

processor

discharged.

fuses.

circuitry

to

Sections

Refer

to

ㆍ

measurement

be

Refer

to

on

ihe

5.

3.4

board.

Refer

to

Symptom

Probable

Diagnosis

INSTRUMENT

2.
BATTERY

INSTRUMENT

CORRECTLY

IN

NOTE:

Symptom

INSTRUMENT
STEADY
CONTINUOUS

USE”

INOPERATIVE

(functional

FUNCTIONS

ON

LIGHT

This

symptom

#1

once

INOPERATIVE,

DISPLAY

on

BATTERY,

STAYS

the

SEGMENTS

BEEP.

AC).

ON

FOR

may

turn

battery

ON

|

“BATT

discharges.

|,

AC.

into

RANDOM

AND/OR

\

|

Failure

A.

charger
and

Battery

4.3.5.
Blown

o

Blown AC

AC

P>

Refer

AC

Refer

+18 V power

во

Section

"

Failure
processor
processor,
circuitry).
+5 V power
Sections
Failure
board.

of

battery

board.

3.7.2.

failure.

battery

fuse.

rectifier

to

Sections

rectifier/filter

to

Sections

5.3.1.1.

of

microprocessor

Refer

5.3.1

of

switching

Refer

Refer

Refer

fuse.

Refer

failure

failure

supplies

board

ROM,

to

supply

and

to

Sections

charger

to

Refer

on

5.3.3

5.3.1

(including

RAM,

Sections

out

3.6.
circuit

circuit

to

Sections

Sections

to

Section

to

Section

the

charger

and

3.7.

on

power

and

3.6.

out

of

spec.

logic

the

and

associated

5.4

of

spec..Refer

on

5.3.4

onthe

5.3.3

5.3

and

4.3.5.

4.4.1.

board.

supply.

Refer

on

the

micro-

and

3.4.

'

charger

and

3.7.

.

to

Po

to

INSTRUMENT

SHOWS

INSTRUMENT

SHOWS

‘INSTRUMENT

SHOWS

“Err

“Err

“Err

OPERATES,

1”.

OPERATES,

2”.

OPERATES,

3”.

-

DISPLAY

DISPLAY

DISPLAY

Failure
board

to

Failure
board
to

Failure
diagnosed
Section

+18 V power

Sections

Failure
processor

3.4.4.

of

RAM

diagnosed

Sections

of

ROM

diagnosed

Section

5.4

of

an

3.5.1.4.

5.3.1

of

D/A

board.

during

memory

during

5.4

and

memory

during

and

3.4.1.

LED

segment

power

supplies

and

3.6.

conversion

Refer

on
power

3.4.1.

on

power

up

out

of

circuitry

to

the

processor

up

test.

the

processor

up

test.

or

lamp

test.

Refer

spec.

|

on

Sections

Refer

Refer

to

Referto

the

5.4.6

and

|

4-7

Symptom

8.

INSTRUMENT

INDICATION,

SATURATION.

OPERATES,

PULSE

RATE,

NO

OR

PULSE

_

Probable

A.

Sensor
Section

B

Patient

Refer

+18 V power

C.

Sections

D

Circuit
processing

Refer

A/D
sor

Defective

sor

Diagnosis

disconnected

3.3.

module

to

Section

supplies

5.3.1

failure

to

of

circuitry

Sections

converter

board.

board.

Refer

LED

Refer

or

inoperative.

or

its

cable

3.3.

out

and

3.6.

the

analog

on

the

5.4

and

circuitry

drive

failure

to

Sections

or

amplifier

to

Sections

detective.

|

of

spec.

Refer

signal

processor

3.4.2.

on

the

5.4.6

and

on

5.4

and.

Refer

to

board.

|

proces-

3.4.4.

proces-

3.4.2.

to

9,

INSTRUMENT
INDICATION,
PULSE

10.

INSTRUMENT
WAVEFORM
VALUES

11.

INSTRUMENT

RATE

“NOISY”.

"RASPY".

12.

INSTRUMENT.OPERATES,
TURN

OFF

OPERATES,

NO

SATURATION

DISPLAY.

OPERATES,

AND

SATURATION/RATE

OPERATES,

WITH

SWITCH

PULSE

OR

PULSE

BEEPER

DOES

IN

NOT

“STDBY”.

|

Defective

Section

Defective

processor

Circuit
analog

board.

Defective

Section
Noisy
Sections

Partial
circuitry
Sections

Noisy

5.3.1.2

Failure
board.

3.3.

failure

processing

Refer

3.3.

+5

failure

+5V

and

of

Refer

red

LED

red

LED

board.

in

to

Sections

sensor

or

+18

5.3.1

апа

of

on

the

processor

5.4.6

and

power

3.6.

switching

to

Sections

on

the

driver

Refer

the

RED

circuitry

or

tester.

VDC

power

3.6.

the

A/D

3.4.4.

supply.

circuitry

sensor.

circuit

to

Section

channel

5.4.5

conversion

board.

Refer

5.3.4

on

on

the

and

Refer

supply.

-

to

in

charger
and

Refer

to

Refer

to

3.4.2.5.

of

the

processor

3.4.2.

Refer

to

to

Sections

3.7.1.

|

4.2.2.2.

Symptom

Powerbase

΄

1. . NOANALOG

OR

DIGITAL

OUTPUTS.

Probable

A.

AC

B

Picofuse

Section

C.

Faulty

D

Digital

.

boards.

Diagnosis

power

disconnected.

blown

3.8.1.
transformer.
circuitry

Refer

on

mother

.

on

upper

to

Section

Refer

PCB.

to

Section

or

lower

3.8.2.

Refer

to

3.8.

daughter