Air-Shields Mobile Infant Warmer User manual

INFANT

AND

MOBILE

CARE

INFANT

SYSTEM

WARMER

SERVICE

ML

MARCO

SCIENTIFIC

MANUAL

The

product

reared

During

certified

no

charge,

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resultant

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described

dence

All

consumable

shipment

the

one

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except

warranty

therefrom

1.

Damage

2.

The

customer

customer

The

3.

Air-Shields.

or

Sale

4.

warranty

We

NOTE:

Guardian

in

this

and

only.

year

is

to

service

is

suggest

Maintenance

disposable

warranty

dealer

labor

costs,

rendered

if:

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unit

fails

uses

is

of

lieu

in

that

to

void

is

to

any

performed

all

insurance

WARRANTY

manual

is

under

products

period,

any

be

defective

to

incurred

maintain

parts,

other

the

parts

the

customer.

and

Air-Shields

as a result

the

accessories,

non-certifled

a

by

warranties,

hospital

Program,

in

safeguard

warrant)

warranty

are

warranted

other

than

material

cannot

of

unit

in a proper

fittings

or

expressed

those

or

for a period

those

or

workmanship

be

mishandling.

service

or

warranty

its

offered

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be

free

listed

held

manner.

manufactured

not

dealer

implied.

by

by

of

liable

our

one

from

above,
will

agency.

participating

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defects

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replaced

for

conditions

sold

or

dealers.

in

the

upon

by

a

at

by

our

Prompt

certified

before

SERVICE

ALABAMA,

279-0103

(208)

era

Fa

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placing

1.

Have
Have

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make,

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AS

JACKSONVILLE

FLORIDA,

CEAT

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FLORIDA,

592-9960

(205)

ORLANDO

FLORIDA,

ECO

ATLANTA

GEORGIA

aras

Cai

service

dealer

your

call:

the

unit

available.

who

person

the

operating

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serial

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ILLINOIS,

633-5420,

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BESLE

(218)

or

simple

DES

485-8866

236-1909

SERVICE

Air-Shields

your

for

CHICAGO

center

service

familiar

most

is
instructions

the

unit

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of

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problem.

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941-6550

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NE

YORK,

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CAROLINA.

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CINCINNATI

772-5594

CLEVELAND

19040

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CHARLOTTE.

RALEIGH

USA

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through

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fura

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which

PORTLAND

297-1719

367.620

3890754

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ο

PITTSBURGH

NASHVILLE

DNS

ος.

ii

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CARL

MILWAUKEE

Cat.

No.

78

990

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NOTE

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PARTS:

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PAGE

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LIST

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CHANGE

NO.

PAGES

DATE

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ISSUE

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Front
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iii

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TABLE

TCS

OF

CONTENTS

AND

MTW

y

SECTION

GENERAL

1.1

1.2

1.3

INSTALLATION

2.1

2.2

2.3

INFORMATION

Introduction

Description

Equipment

Installation

2.1.1

2.1.2

Cleaning

0

perational

2.
2

La Lo

2.

Lo

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yn

2
2

2.

2.

2.

+3.

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La

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and

Infant

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TABLE

29070000.

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Procedure

Care

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Servo

Servo

Controller

Controller

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(SC78-2)

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CONTENTS

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2-1
2-1
2-1
2-2

2-4
2-4
2-4
2-4
2-4

2-5

2-5
2-6

3.

TECHNICAL

3.1

3.2

PREVENTIVE

4.1

4.2

3

4.3

INFORMATION

Specifications

Theory

3.2.1

2
3

4

of

Operation

General

Warmer
Manual

Servo

5 | Servo

6.

Resuscitation/Aspiration

MAINTENANCE

General
Cleaning

4.2.1

4.2.2
Recommended

........

and

General

Sterilization

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OC

Module

Controller

Controller
Controller

Sterilization

Cleaning

Calibration

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neces

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3-6
3-6
3-6
3-6
3-10

3-15

4-1
4-1

4-1
4-2

SERVICE

eno

5-1
5-1
5-1
5-1

5.1

5.2

General

Calibration

5.2.1

5.2.2

5.2.3

Test
Test

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ICS

TABLE

AND

OF

MIW

CONTENTS

SECTION

5.3

5.4

5.2.4

5.2.5

5.2.6

5.2.7

5.2.8

5.2.9

5.2.10

5.2.11

5.2.12

5.2.13

5.2.14
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5.2.16

5.2.17

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Manual

Servo

Supply
Servo

Measuring

Servo
Circuit

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Servo

Warm-Up

Servo
Angle

Servo

Servo

TestS
Servo
Frequency

Servo

Servo

Circuit

Servo

Control

Servo

Adjustment

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Servo

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Resuscitation

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Venturi

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FN

General

Test

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Venturi

Controller

Controller

Controller

Controller

Controller

Control

Controller

Controller

Controller

Controller

Controller

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Controller

Controller

Equipment

Replacement

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OF

Controller
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(CONTINUED)

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PAGE

52
572

5-2

5-4

DIG

5-5

İZİ

5-7

37

5-9

3-10

0
9-1

5-11
5-12
5713

5713
人

5-14
3-20

3720
9720
5-22

ii

PARTS

6.1

General

DIAGRAMS

7.1

General

LIST

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

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

c.:

...

00...

7-1

TABLE

ICS

OF

CONTENTS

AND

N

MIW

LIST

OF

ILLUSTRATIONS

ILILE

Typical

Assembling
Installation

Assembling
Typical
Typical
Test

Servo
Controller
Test

5

Servo

PCB

Micro-Filter

Venturi
Infant
Covered

Manual

PCB
Servo

PCB

Diagram

PCB

Diagram

Servo
PCB

Diagram

PCB
Diagram
Standard

Diagram

Intensive
Intensive

Location

Mobile
Warmer

Intensive

Parts
Intensive
Parts

m

6.18

Resuscitation/Aspiration

Diagram

Venturi
Parts

6.19

6.20

Oxygen

Location

Oxygen

Parts

Infant

Resuscitation/Aspiration

Aspiration

Point

Controller

Point

Controller

Assembly

Removal

Care

in

Controller,

1,

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6-60

(Change

1)

iii

IcS
TABLE

AND

MIW

OF

CONTENTS

6.21

6.22

6.23

6.24

6.25

6.26

6.27

6.28

6.29

+

Fu

ο

SO

ty

0.

SE

lo
E

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SES

SE

la

.

JQ
0

“AEA

Examination
Location

Examination

Location

Monitor
Location

Monitor

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Gas

(One

Gas

(Two

AC

Receptacle

Instrument

Bassinets),

Instrument

Care

o

I.V.

Functional

Functional

Functional

Schematic
Schematic
Schematic

Wiring

Schematic

LIST

Light

Diagram

Light

Diagram

Shelf

Diagram

Shelf

Weld

Cart

Delivery

Piece

Delivery

Piece

Bassinets),

Pole

Hose

Hose

Tray

Tray

Assembly,

Block

Block
Block

Diagram,
Diagram,
Diagram,

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Diagram,

OF

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Assembly

Parts

Panel,

Assemblies)

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ILLUSTRATIONS

TITLE

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Parts

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6-72

6-74

6-76

6-78

6-82
6-86

6-88

6-90
6-92
7-3

7-5
7-6
7-7

7-9

7-10
7-11

(Change

1)

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TABLE

ICS

OF

CONTNETS

AND

MIW

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9

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Specifications

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IcS
TABLE

AND

MIW

OF

CONTENTS

Manual
Servo

Servo

Controller

Controller

Controller

LIST

OF

FLOWCHARTS

TITLE

Troubleshooting

(SC78-1)

(SC78-2)

Troubleshooting

Troubleshooting

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PAGE

5-15

5-16

5-18

у

vi

m

GENERAL

ICS

AND

MIW

INFORMATION

SECTION

GENERAL

1,1

This
troubleshooting,

Air-Shields®

It

do

instructions
in

indicated

This
the

1.2

The
that
term

aspiration,

INTRODUCTION

manual

is

the

Section

manual

unit.

provides

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responsibility

in

5

of

must

should

DESCRIPTION

Air-Shields®

may

be

used

treatment

and

instructions

and

repair

Infant

this

manual,

this

manual

be

performed

be

Infant
immediately

of

infants

when

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read

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of

the

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and
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only

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after

requiring

special

INFORMATION

for

Air-Shields®

user

to

to

ensure

performed.

by

Air-Shields

is

birth,

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needs

1

installation,

Infant

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by

all

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during

are

the

that

the

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certified

personnel

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visability,

required.

use,

unit
maintenance

provide

special

operator

Care

System

in

accordance

requirements

service

who

will

an

integrated

procedures,

thermal

maintenance,

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with

recommendations

so

representatives.

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system

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1.5

m

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representative.

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Infant

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EQUIPMENT

manual

this

systems
to

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and

used

System

and

either a Manual

consists

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provides

as

equipment

typical

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Infant

with

consists

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well

provided

Warmer

bassinets

of a Cart/Bassinet,

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AND

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and

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parts

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manufactured,

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use

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information

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for

all

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and

system,

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to

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to

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sales

Ics

AND

GENERAL

MIW

INFORMATION

BASSINET
MODEL

EXAMINATION

LIGHT

INTENSIVE

BASSINET

NUMBER

IV,

CARE

POLE

WARMER

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CONTROLLER

CONTROLLER
MODEL

SERIAL

OXYGEN
SYSTEM

OXYGEN
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REAR

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AND

NUMBER

ODEL

ERIAL

OF

ANO

NUMBER

DELIVERY

TANKS

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CART

リリ

FIGURE

1.1

TYPICAL

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CARE

SYSTEM

ICS

AND MIW

INSTALLATION

すり

2.1

2.1.1

A.

The

Cart/Bassinet,

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(1),

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the

Assembly

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Tilt

Plug

then

INSTALLATION

INFANT

Infant

then

Base

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to

Figure

slide

the

Assembly.

with

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controller

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bottom

PROCEDURE

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INSTALLATION

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(4)

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2-1

ICS

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2,2

and

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4.2

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manual.

ICS

AND

MIW

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|

FIGURE

2.3

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THE

MOBILE

INFANT

WARMER

(Change

1)

2-3

IcS

AND

MIW

INSTALLATION

2,5

Periodically,
have

OPERATIONAL

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2.3.1

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buttons

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especially

in

use,

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slide

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front

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rear

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bassinet

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freely

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after

panel

panel

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the

cannot

properly

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be

routinely

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depressed.

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ac

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the

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the

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either

Tilt

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EXAMINATION

CAUTION:

power
grade

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the

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cord
or

hospital

frequency.

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cannot

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ensure

on

to

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System

Switch

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or

Mobile

on

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each

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position.

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voltage

power

Post

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and

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Tilt

cord

to

in

the

ON

the

Bassinet

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the

Release

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the

2-4

ICS

AND

MIW

INSTALLATION

2.3.5

Place

A.

Rotate

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should

2,3,6

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A.

should

Depress

while

(37.8°C).

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of

Control

readings.

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position

temperature

White
by

MANUAL

the

the
come

SERVO

the

be

observing

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the

probe

the

Pointer

the

RED

CONTROLLER

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TEMPERATURE

on.

CONTROLLER

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PATIENT

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in

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MANUAL

TEMPERATURE

until

it

indicated

on

Pointer.

ON/OFF

the

the

TEMPERATURE

PROBE

above

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the

Power

ON-OFF

Control

(SC78-1)

Switch

METER

TEMPERATURE

CAL-ON Switch

in

the

Mattress.

range.

CONTROL

into

by

the

the

Switch

from

in

the

Meter.

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ICS-MANUAL

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Pointer

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to

ON

position.

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Panel
Rotate

the

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in

the

MAX.

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change

Control

the

on

the

climb

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reading

position

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to

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position.

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setting

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ONLY

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clockwise

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indicated

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point.

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POWER

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Pointer

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meter

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should

System - Visual

temperature

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two

sound

(2)

times.

the + 1°F

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silenced

IT

SHOULD

false

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ON/OFF

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should

15

the

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be

silent

the

CONT

minutes,

flash.

or

temporary

CONTROLLER

the

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switch

CONT

indicate

read 0 and

POINT

and

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deviate + 1°F

and

the

alarm

per

second.

(0.6°C)

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variance,

by

sliding

SILENCED

temperature

(SC78-2)

Probe

to

the

OFF

POINT

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the

knob

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the

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knob

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ONLY

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position.

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switch

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Indicator

the

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rear

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shut

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procedures

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position.

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indicates

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to

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off.

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switch.

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go

silent

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ICS

AND

MIW

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F.

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meter

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sounds.

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Module

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the

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Pointer.

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steady-ON.

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Warmer

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OUTPUT

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meter

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Module

until

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the

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less

the

Warmer

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depress

ONLY

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gauge

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the

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on

the

rear

temperature

the

METER

indicate

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left

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attached

and

the

reads

sure that

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between

System

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WARNING:

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presence

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to

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tanks

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200

pressure

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unit.

left

on

and

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Pointer

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Since

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source

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on

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2500

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fitting

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calibrate

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meter

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infant)

on

the

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meter

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meter).

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flammable

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used

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tank

tank

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temperature

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suction

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good

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PACKAGE

control

tube,

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WARNING:

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range

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and

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valve

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flow

ASPTRATION

on

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flowmeter

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Control

the

green

psi.

the

slightly

both

System)

FROM

the

flowmeter

is

determined

PACKAGE

place

cylinders

turned

(needle

(venturi)

wrench,

gauge

cylinder

cylinder

WALL

open

on

the

valve

counterclockwise.

pressure

fitting

OXYGEN.

to

by

the

following

turned

fully

valve)

turned

the

cylinder

resuscitation

and

valves.

hose

from a source

the

desired

reading

fully

clockwise

turned

fully

relieve

Repeat

(50 + 5

level

the top

valves

and

counterclockwise

fully

clockwise

clockwise

valve

post;

the

by

the

pressure

step 1 using

psig)

with a male

of

oxygen

by

turning

of

the

controls

turning

reading

to

float

clockwise.

by

turning

the

DISS

the

connection

the

knob.

in

the

in

the

should

other

flowmeter.

position

Observe

be a minimum

the

flowmeter

cylinder.

(Diameter

labeled

The

rate

Index

of

A.

Attach
vacuum

B.

Occlude
valve

VENTURI

A.

Turn

B.

Occlude

valve

the

wall

vacuum

gauge.

the

patient

and

observe

RESUSCITATION/ASPIRATION

WARNING:
vapors,
cyclopropane
plosion

in

on

oxygen

the

patient

and

observe

end

the

vacuum

hazard

the

presence

from

either a cylinder

end

the

vacuum

tubing

of

Since

such

of

to

the

aspiration

gauge

PACKAGE

mixtures

as

alcohol,

may

explode

exists

of

the

aspiration

gauge

the

and

if

these

and

wall

vacuum

tubing.

determine

of

oxygen
ether,
if

ignited,

the

gasses.

or

wall

tubing.

determine

ethylene,

units

source.

fitting

Adjust

if a vacuum

and

an

are

Adjust

underneath

the

flammable

and

ex-

used

the

if a vacuum

the

vacuum

is

needle

present.

vacuum needle

is

present.

2-7

ICS

AND

MIW

INSTALLATION

2-8

(This

page

intentionally

left

blank.)

TECHNICAL

.

ICS

AND

INFORMATION

MIW

3,1

Specifications

are

SPECIFICATIONS

provided

in

for

Table

the

Air-Shields®

3.1.

SECTION

TECHNICAL

INFORMATICN

Infant

3

Care

>

System

and

Mobile

Infant

Warmer

3-1

ICS

AND

TECHNICAL

MIW

INFORMATION

INFANT

CARE

SYSTEM

Environmental

Temperature
Humidity

Vibration

Altitude

Mechanical - Cart/Intensive

Bassinet

Height
Length
Length

Width

Width

Height
Length

.oo。。

and

.....0

Assembly

(floor
(at

wheelbase)

(with

(at

wheelbase)

(at

cart

of

mattress

of

module

TABLE

Range

Monitor

........0000000

Shock

1000000000000,

With

to

top

top-width

power

3.1

SPECIFICATIONS

..........

Care

Warmer

of

Warmer

........

shelves)

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

of

from

floor

cord

sors

sos...

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Module)
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bassinet)

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15°

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201.9

99.0

112.5

71.1

58.4

101.6

3.15

to

40°C

954

Nursery

to

cm

(79-1/2

cm

(39

inches)

cm

(48-1/4 inches)

cm

(28

inches)

em

(23

inches)

cm

(40

meters

(10'4")

Handling

3000

meters

inches)

inches)

Mechanical - Cart/Standard

Assembly

Height

Length

Length

Width

Width

Height

Length

Oxygen

From

From

Electrical

120V
220V
100V

With

(floor

(at

(with

(at

(at

of

of

Input

cylinder

wall

Models
Models
Models

Warmer

to

wheelbase)

Monitor

wheelbase)

cart

top - width

mattress

module

Requirements

................4.+.+4

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

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

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

...........

Module:

top

of

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

shelves)

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

from

power

cord

sos.

Bassinet

Warmer

floor

ee
correa

Module)

ㄴㄴ,

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corses...

of

bassinet)

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

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

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see,

ㆍ,

201.9

,

99.0

108.7

71.1

40.0

96.5

3.15

Up

50-55

99 - 132,
198 - 264V,
85 - 115V,

cm

cm

см

cm

cm

cm

meters

to

2500

psi

(79-1/2

(39

inches)

(46-3/4

(28

inches)

(16-1/2

(28

inches)

(10'4")

psi

nominal

50/60

50/60

50/60

inches)

inches)

inches)

Hz,

630

Hz,

630

Hz,

630

watts

watts

watts

TECHNICAL

ICS

AND

MIW

INFORMATION

MOBILE

Mechanical

Electrical

INTENSIVE

INFANT

Height

Depth

Weight
Width

Distance,
connection

Length

120V

220V

100V

Height
Width
Length
Height
Width

Length
Weight

...............0%0.0.00

of

Models

Models

Models

CARE

..........2.

of

TABLE

WARMER

......00000

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wheelbase

floor

(optional

of

Power

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3,1

SPECIFICATIONS

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198 - 264V,

85 - 115V,

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(10'4")

50/60

50/60

50/60

cm

(10-1/4 inches)

cm

(23

inches)

cm

(30-1/4 inches)

cm

(5

inches)

cm

(19

inches)

cm

(26

inches)

Kg

(36

lbs)

inches)

inches)

Hz,

Hz,

Hz,

630

630

630

watts

watts

watts

STANDARD

EXAMINATION

BASSINET

Length

Width
Height

Welght

Lamp

Diameter

Height

Support

Diameter
Length

Weight

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cm

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cm

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foot

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inches)
inches)

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inches)

inch)

lbs)

3-3

ICS

AND

TECHNICAL

MIW

INFORMATION

WARMER

RECEPTICAL

GAS

CONSOLE

MODULE

Warmer

Length

Width

Height

Length

Width

Height

Weight

Voltage

Width

Depth

Height

TABLE

(EXCLUDING

Housing

tons

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cm

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cm

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(3-1/2

cm

(4

inches)

inches)

inches)

inches)
inches)

inches)

lbs)

amp

inches)

inches)

max.

Inputs

OXYgen

Air

Suction

Color

Output

Input

ooonoorocccosomoncrrrasonsosssa

sense

CC

Code

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CONTROLLERS

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Length

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Height

Weight

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Yellow-Air,

White-Suction

Pneumatic
with

1.5

with

9.6

15.6

9.1

0.61

Hoses

check

or

3.1m

or

without

cm

(3-3/4

cm

(6

cm

(3-1/2

Kilograms

and

Green-0,,

-

DISS

valves

(5

inches)

inches)

inches)

Front Panel

fittings

or

10

feet)

DISS

fittings

(1-1/2

1bs)

3-4

TECHNICAL

ICS

AND

MIW

INFORMATION

TABLE

Overload

Servo

Dimensions

Weight

Overload

120V
220V

100V

Controller

Height

Width

Depth

110-120V

220-240V

100V

Protection

Models
Models
Models

oe

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ns

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Models

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3.1

SPECIFICATIONS

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amp

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cm

(6-3/4

cm

(8

Kilograms

amp

Quick

amp

Quick

amp

Quick

Acting
Acting
Acting

inches)
inches)

inches)

(6.6

Acting

Acting

Acting

lbs)

Temperature
calibrated

Set

Point Range

ACCUTACY

Type

of

Alarm

Alarm

(Visual).。。

(Audible)

Indication

using

«ο»

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front

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92

to

104 + 0.4°F

33

to

40 + 0.2°C

92

to

104°F

+

0.6°F

Meter

Blinking

one

temperature

(1.8°F)

À

pulsed

of

approximately

during

(0.3°C)

light

flash

from

tone

alarm

(33.33

per

deviates + 1°C

control

with a period

period.

to

(approximately

second)

set

one

second

40°C)

when

point.

(Change

1)

3-5

ICS

AND

TECHNICAL

MIW

INFORMATION

3,2

3,2,1

This

THEORY

section

Warmer
Manual

Servo

Servo

OF

GENERAL

contains

Module
Controller

Controller
Controller

OPERATION

Resuscitation/Aspiration

3,2,2

The

theory

each

3,2,3

The

Manual

trigger

and

C2

vide

of

the

WARMER

of

controller.

MANUAL

Controller

which

provide

maximum

high

frequency

MODULE

operation

CONTROLLER

sets a consistant

the

to

minimum

functional

(SC78-1)
(SC78-2)

of

controls

variable

heater

harmonics

descriptions

System

(REFER

the

Warmer

(REFER

the

trigger

phase

output.

produced

TO

FIGURE

Module

TO

Warmer

is

FIGURES

Module

level

within a half

Li

and

by

the

the

of

7,8)

explained

Heater.

for

Triac

line

C3

provide

switching

following

in

7,1

AND

Q1

(2.

cycle

to

effective

Triac

components:

conjunction

with

7.4)

is a bidirectional

RI,

R2, R3,

fire

Q2.

Ql

CI,

and

to

attenuation

..

pro-

3.2.4

Servo

Control

Manual
to

sense

panel

The

skin

skin

of

approximately

ISC

Mode

sense

meter

The

control

physician.
proportionally

maintain

The

unit

ature

occurs,

skin

The

audible

SERVO

Controller

(ISC)

Mode

the

meter.

temperature

temperature

utilizes a skin

the

which

a

is

deviations

the

temperature

CONTROLLER

(SC78-1)

mode.

utilizes a skin

skin

skin

contains

point

The

stable

equipped

audible

alarm

temperature.

is

prescribed

1°F

above

temperature.

a

is

adjustable

sensed

increases

skin

with a visual

of + 1°F

alarm

returns

can

be

(SC78-1)

functions

temperature

manually

by

the

the

control

temperature

The

temperature

skin

temperature

or

decreases

temperature.

(0.6°C)

will

sound

to

within + 1°F

silenced

in

The

skin

adjustable

attending

probe

skin

temperature

control

to

the

the

and

from

and

while

(REFER

either a manual

probe

To

which

temperature

with a front

physician

point

temperature

audible

the

setting.

which

point

is

relayed

Warmer Module

is

indicator.

alarm

control

the

alarm

(0.6°C),

special

procedures

is

prescribed

to

point.

light

the

FIGURES

or

an

Infant

is

attached

is

displayed

panel

with a maximum

attached

displayed

the

system

alarm

to

controller

heater output

which senses

When

will

system

are

7.2

AND

Servo

to

the

on a front

control

the

infant

on a front

by

the

attending

which

the

deviation

flash.

will

performed.

7.5)

infant

to

the

temperature

to

panel

to

temper-

When

the

reset.

The

initial

until

The

theory

PCB

JA

PCB

1A

control

a

decrease

of

contains

circuits.

warm-up

in

operation

the

alarm

temperature

power

(while

on

a

supply,

PCB

below

of

0.4°C

basis

alarm

the

low

is

sensed

is

described

driver,

alarm

triac

point)

by

the

in

control,

TECHNICAL

may

probe.

the

following

be

and

manual

ICS

AND

MIW

INFORMATION

disabled

paragraphs.

POWER

Power
of
across
C5

an

SUPPLY

for the

Tl.

each

and

C6

output

regulator

A

+7.8

Volts

ALARM

The

TRIAC

The

MANUAL

The

PcB

DRIVER

alarm

CONTROL

triac

CONTROL CIRCUIT

manual

2A

The

secondary
half

is

voltage

with

driver

control

control

electronics

of

the

+20

and

of

an

output

dc

supply

CIRCUITS

circuits

CIRCUIT

circuit

circuit

of

Tl

secondary.

-20

Volts

+11.3

voltage

voltage

are

is

is

supplied

is

Volts

described

described

is

described

center

dc.

dc
of

is

generated

through

tapped
The
011

+

10%.

-11.3

under

under

under

P2,

with
rectified
800

CR16

(12

Volts

by

R60,

PCB

PCB

PCB

Fl,

and
approximately
filtered

provide

and

CRI7

dc

+

10%.

CR18,

2A

High-Low

2A

Phase-Angle

2A

Phase-Angle

Sl

to

de

voltages

a

series

provide

CR19,

Alarm

the

primary

15

V

regulator

a

series

and

CR23.

Circuits.

Control

Control

rms

across

with

Circuits.

Circuit.

PCB

2A

contains

Initial

TEMPERATURE

The
used
R85,

(1C2,

92°F

ICl

R5

to

IC2

control,
output
and

Warm-up

infant's

in

conjunction
R95,
and
to

104°F

is

an

and

R7.

the

initial

is

an

at

HI-LO

MEASURING

and

fed

operational

The

op-amp

R14.

pin 6 of

alarm

the

Temperature

Low

Alarm

CIRCULT

temperature

with a bridge

R100.

to

(33.3°C

output

warm-up

The

circuit,

the

temperature

used

gain
IC2

The

amplifier

in

Disable

is

voltage

to

40°C).

at

pin 6 of

LO-alarm

the

range

is

applied

and

Measuring

Circuit

sensed

circuit

output

meter,

with a gain

disable

inverting

is

30-40

to

the

temperature

Circuit,
and

using a temperature

consisting

of

the

displaying

of

ICl

is

applied

circuit

mode

with

determined

the

temperature

record

High-Low

the

Phase-Angle

bridge

a

5.

This

to

via

an

by

temperature

R65.

adjustable

circuit.

probe.

of

R1

is

amplified

gain

the

input

R11,
meter,

Alarm

Control

The

through

range

is

determined

of

front

R13,

and

phase-angle

Circuit,

Circuit.

probe

R4,

R84,

by

1С1,

of

IC2

and

panel

R14.

control

is

by

also

gain

The

IcS

AND

MIW

TECHNICAL

voltage

The

being

(33.3°C

sensed

to
output/input
per

°C).

R15

and

R16

is

applied

INFORMATION

6

pin

at

the

by

ratio

the

of

40°C),

divide

to

the

input

IC2

of

temperature

voltage

millivolts

400

this

0-4.8 volts

of

IC3.

will

level

linearly

be

probe.

will

de

The

Over

be

°F

per

down

output

proportional

display

the
0-4.8
of

volts

temperature

to a Zero

of

IC3

is

the

to

range

This

dc.

(716

to 1 volt

not

used.

temperature

92-104°F

of

gives

millivolts

de

level

an

which

R17 and R88

When

The
by

full

35,

the

scale

output

depending

is

negative

The

output

probe)

R86

is
checked
bridge

HIGH-LOW

The

HI-LO

The

HI-LO

control

face

R20

(Red

provides a voltage

(33.3°C
IC4,
IC6.

IC8,
mately

The
The

the

334
Therefore,
output

dc

to

+10

(Q8

and

pulse

The

approximately

audible

provide current

voltage

reading

voltage

assuming

upon

over

voltage

is

typically

switched

to

produce

offset

ALARM

alarm

alarms

point

Pointer),

to

40°C).
output
output

LO

alarm
millivolts.

when

of

IC8,

volts

Q9),

alarm

of

35

the

the

into

to

prevent

CIRCUITS

circuit

are

setting.

of
of

the

the

dc.

which

limiting

pin 6 of

of

104°F

at

pin 6 of

is

the

setting

(40°C)

gain

of

IC2

ICI
of

R14.

is

IC2.

displayed temperature

of

the

+320

the

sufficient

consists

set

The

and

control

of

This

voltage

IC4

and

IC6

is

voltage

voltage

LO

alarm

This

drives

two

(2)

may

be

bridge

to

bridge

the

to

0-4.8

applied

comparator.

This

voltage

the

deactivated

circuit's

+300

millivolts

via

offset

temperature

of

activate

control

is

volts
of

the

output

is

equivalent

at

pin 6 of

comparator,

will

visual

times

per

to

the 1 milliampere

4.8

volts

on

the

will

be
This gain

The

polarity

534

when

for

IC4,

at

+1°F

point

provided

dc

0-4.8

of

to

IC7,

R45 and R46

IC6

will

turn

and

second

using

dc,

R88

meter.

the

output

may

of

the

range

left

of

leg

92-104°F

(RI,

for a temperature

meter

calibration

100°F meter

meter

IC6,

when
volts

IC7,

or

setting

by

the

IC2

are

the

from

-1°F

R20

dc

HI

hitting

IC8,

is

and

control

is
fed

alarm

generate a voltage

to a temperature

is

-334

millivolts

switch

on

audible

(0.3

010,

alarms

second

from

starting

$2.

full

scale

is

adjusted

voltage
vary

voltage

of

between

at

(33.3°C

R3,

and

range

is

deflection.

the

left

Q7,

08,

09,

(0.55°C)

indicated

R19.

also

to a comparator

voltage

through

ON,

relative

on

The

wiper

point

at

is

the

comparator,

of

1°F

or

approximately

a

multivibrator

Q7.

and

0.2

meter.

to

give

1C2

divided

30

and

pin 6 of

to

R100

and

of

required

R87

provides

meter

and

the

meter

set

output

amplifier,

of

(0.55°C).

greater,

The

second

a

40

IC1

40°C).

the

92-104°F.

or

stop.

Q10.

to

the

arm

of

for

92-104°F

pin 6 of

and

approxi-

the

-10

volts

alarms

OFF).

a

te

When
alarm

again
temperature

than

the

will

+334

activating

voltage

be

at

activated.

millivolts,

returns

the

the

the

alarms.

to

within

output

When
output

of

the

The

+

IC6

of

alarms

1°F

is

voltage

IC7

will

(0.55°C)

within

at

the

switch

are

automatically
of

-334
output

the

to

from

set

+334

of

IC6

-10

reset

control

millivolts,

becomes

to

+10

volts

when

point.

no

greater

de,

the

TECHNICAL

ICS

AND

MIW

INFORMATION

output

The
control

circuit.

switched

effect

In
reaches

INITIAL

One

the
IC11,

The

amplified

1°F

WARM-UP

function
initial

and

output

pin 6 of
temperature
sensed
phase

IC10,

IC9

for a long

emitter

This

(output

actually

The

maximum

temperature

is

C9,

decreases

of

stored

of

stored

peak

IC7,

of

This

on.

turns

it

(0.55°C)

LOW-ALARM

of

the

warm-up

013

through

voltage

by

IC9.

IC9

while

probe.

proceeding,

013,

and

from

period

Q14.

temperature

IC9)

are

the

real-time

voltage

voltage

HI

the

When

+10

disables

power

off

higher

controller
of

the

021.

of

101

The

fixed

at

77°F

The

output

of

77°F - 104°F

the

Ql4

are

any

maximum

of

time,

voltage

fed

voltage

is

attenuated

level

volts

the

to

than

comparator

de

trigger
the

the

CIRCUIT

alarm

DISABLE

provides

infant.

and a fixed

bias

is

(25°C)

simulated

voltage

maximum

used

positive

in a configuration

positive

and

this

(Q14

to a voltage

which

through

reached

is

is

present

circuit

for
circuits

bias

when

point

disabling

voltage

heater

control

The

adjusted

temperature

of

IC9

(25 - 40°C).

voltage

voltage,

stored

voltage

emitter)

comparator

is

changing

R70

and

during

the

also

at

the

which

the

setting

which

from

to

give a +2

will

be

While

reached

such

this

level

and

the

IC1l.

relative

R71,

warm-up

into

fed

output

feeds

measured

the

LO-alarm

do

this

R63

is

+2

to

the

will

that

peak

is

actual

The

to

and

is

cycle.

phase

the

of

IC7,

triac,

the

temperature

on

the

are

is

summed

volts

dc

provided

+8

Volts

initial

be

if

the

voltage

available

temperature

output

the

sensed

equal

04

meter.

during
IC9,

and

output

for

de

warm-up

stored

output

is

stored

at

of

IC9

to

95%

angle

is

Q6.

IC10,

at

the
for

a

on

C9.

of

the

voltage

is

temperature.

of

the

As

long

as

maximum

dc

keeps

peak

comparator,

When

the

has

come

Q15

to

turn

its

normal

016

is

driven

memory

With

that

During

+10
warm-up
control

by
Q16

is

Q17

017

the

volts

020,

is

subsequently

period

point,

which

disable.

the

real-time

stored

Q15

turned

thereby

initial
to

mode.

within

off.

warm-up

With

from a flip-flop

initially

on,

Q16

is

is

initially

initial

dc.

This
is

over.

IC3's

in

turn

voltage
voltage,
on,

which

disabling

period

1°F

(0.55°C)

Q15

set

with

off,

allowing

turned

warm-up,

voltage

As

output

resets

switched

the

in

the

has
of

off,

this

(Q17

Q17

on

by

IC8,

is

sensed

the

temperature

switches

the

on,

(temperature)

output

turn

of

grounds

alarm.

been

completed

the

control

allows

and

Q18)

turned

Q15

to

on

disable

producing

the

LO

alarm

by

Q20

to

-10

flip-flop,

which

disables

is

IC11

is

the

point,

the

LO-alarm

which

when

power

the

an

initialization

comparator,

to

determine

reaches

volts

turning

the

greater

+10

output

and

Q16

serves

is

LO-alarm.

within

dc.

on

function

than

Volts

the

dc,

of

IC8,

sensed

is

switched

circuit

as a memory.

applied

output

when

1°F

This

voltage

018,

and

of

95%

of

This

the

LO-alarm

temperature

to

operate

to

the

Q19

assures

pulse

the

at

voltage

initial

(0.55°C)

is

turning

the

LO-alarm

the

+10

volts

on

causing

in

This
controller.

power-up.

is

of

the

sensed

off

017.

ICS

AND

TECHNICAL

MIW

INFORMATION

However,

activated

temperature

If

the

output

of

IC1l

will

the

output

ature

returns

remainder

One

other

alarms

are

disables
disable

feature

PHASE-ANGLE

Power

output

to

from

difference
setting
R22,

the

is

and

triac,

an

additional

if

the

sensed

sensed

during

voltage

switch

voltage

of

the

point

to

the
initial

relative

of

disabled.

the

alarms

after

CONTROL CIRCUIT

the

heating

IC2

and

in

input

amplified

R89.

This

Q6.

feature

temperature

the

of

IC9

to

-10

IC8

(+10

stored

warm-up

to

021,

while

021

calibration

element

the

output

voltage

by a gain

bias

voltage

initial

falls

volts

level,

the

022,

and

is

from

of

the

ever

below

DC,

turning

Volts

dc)

the

period.

alarms;

and

023

023

completed.

is

controlled

from

IC4

the

real-time

of

5. A bias

sets

overall

falls

warm-up

95%

to

LO-alarm

during

do

this

insure

through

are

the

initial

circuit

below

period.

of

the

off

Q15.

activate

again

meter

in

the

correct

fed

differentially

temperature

voltage

conduction

allows

0.4ºC

stored

of

voltage,

This

the

alarm.

becomes

calibration

conjunction

operation

IC5,

Q3,

Q4,

and

is

also

LO-alarm

the

maximum

the

immediately

If

the

disabled

using

with

S3B.

of

Q5,

and

into

IC5.

the

control
generated
phase-angle

to

be

output

allows

temper-

for

S3,

the

Q6.

by

for

M

peak

the

the

022
LO-alarm

The

This

point

R21,

The

output

several

warm

the

Volts

capacitor,

When

the
pulse

Q4
of

done

de at

the

unijunction

transformer

and

Q5

the

by

(36.7°C)

band

The

(90%)

and

The

source
Cl

is

10%

manual

which

different

at

3.2.5

voltage

volts

either

infant.

the

Cl.

voltage

are

used

input

voltage

setting

temperature.

width

applied

power

when

control

may

SERVO

at

pin 6 of

direction,

This

output

emitter

level

of

on

transistor

T2,

which

to

reset

(60

Hz).

the

control

R22

the

the

the

of

varied

thereby

of

sensed

control

when

be

rates

CONTROLLER

IC5

voltage

Q2

controls

the

capacitor

will

triggers

the

Initial

point

adjusted

is

phase-angle

the

sensed

temperature

heater

through

changing

(SC78-2)

is

approximately

depending

and a fixed

the

trigger

the

charge

on
setup

to

98°F

to

temperature

provided

is

R28.

the

upon

amount

reaches
and

discharge

triac

Cl at

of

(36.7°C)

50%

a

set

is

is

+0.25°F

is

by

The

various

conduction

(REFER

+9

volts

the

amount

voltage

of

current

approximately

the

into

conduction.

the

beginning

the

conduction

and

simulating a 98°F

conduction

gain

the

by

-0.5°F

Ql.

(.27°C)

from

This

levels

phase-angle

To

FIGURES

dc

and

of

power

of

approximately

which

+6.8

capacitor

of

each

phase-angle

of

for

IC5.

angle

from

set

the

constant

a

is

of

current

7,3,

will

required

charges

volts

into

half

the

Full

set

point.

the

of

7.6,

change

+8.5

the

de

the

cycle
is

triac.

power

point,

current

charge

triac.

AND

to

o

7.7)

The

to

ature

3-10

SC78-2

the

is

Servo

infant,

displayed

Controller

to

sense

on a front

utilizes a skin

the

skin

temperature

panel

meter

temperature

of

the

which

contains

probe

infant.

a

which

The

skin

temperature

is

attached

temper-

control

A