Fisher MR730, MR720, MR700, MR480 User manual

TECHNICAL

MANUAL

RESPIRATORY

HUMIDIFIER

MR730

MR720

MR700

MR480

MODELS

Revision

Issued

Copyright © 1991

Auckland,

Fisher

23

Fisher & Paykel

&

HEALTHCARE

D

October

New

1995

Ltd,

Zealand

Healthcare

Paykel

Division

Fisher & Paykel

and

reserve

Fisher &
Healthcare

Fisher & Paykel

P.O.

Auckland,

Telephone:

Facsimile:

Part

Number

Technical

Box

the

right

Paykel

Division.

14348,

New

+64-9-574

+64-9-574

185

Manual

MR730

MR720

MR700
MR480

Healthcare

Electronics

Panmure.

Zealand.

040 646

for

have a policy

to

alter

0100

0158

Respiratory

Dual

Servo

Dual

Servo

Dual

Servo

Single

of

continued

specifications

Limited.

Humidifier

(anaesthesia)

Servo

without

Issued

notice.

23/10/95

models:

product

improvement

Changes

GENERAL
and

version

to

Technical

Rewrite

3.0

software

Manual

Description

and

update

to

Since

of

Change

incorporate

Last

change

Version.

to

Rev H PCB

Page

Affected

various

Numbers

MR730/720/700/480

Technical

Manual # Revision D *

issued

October

1995

CONTENTS

PAGE

1.0

1.1

1.1.1

1.12

1.1.3

12
13

14

1.5

2.0

2.1

2.1.1

2.1.2

2.2

221

222

2.2.3

2.24
23

2.3.1

2.3.2

24

2.5

2.6

2.6.1

2.62

2.6.3

2.7

2.7.1

2.7.2

MR700

Electrical

Standards

Series

Specifications
Models
Model

Common

MR730/720/700

MR480

and

Temperature

Temperature
Temperature

Operating

Adjustable

Airway

Chamber

Push

Mute

Chamber

Standby

Heater

Power

Version
Version

Heater

MR730/720

Warm

MR700/MR730

MR700/MR730
MR720

Standby

MR700/MR730

MR720

Controls

Temperature

Switches

Button

Button

Wire

Up

Seguences

1.0

2.0

Wire

Up

Mode

With

Mode

Standby

General

Electrical

Approvals

Control

Sensing..
Display

..

Controls

Control

Temp

On

in

(Heater

Button..

(MR700/720/730

Switch

Software
and

Version

Mode

Heater

and
and

Version

and

Mode

Specifications

..

Specifications

And

Modes

Control

Wire

On

(MR720,

(All

Wire

MR720(version
MR720(version

2.0/3.0

MR720

MR730

3.0

Software

models

Off

Mode

Software

(Version

(Version

except

(All

Mode

only)

and

1.0)

1.0)

2.0

and

essence

Models).

Only).

...

only).

MR480)..

MR480

in

Heater

in

Non

.

1.0)

Only.

3.0

software

..

Wire

Heater

Mode..

Wire

Mode

and

only)

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

1

1

1

„I

wel

1

2

πο

2

+3

…3

....3

3

„3

3

3

3
4

4

....4

4

4

s.m.

„5

5

MR480...

5
ο

5

„5

~

ci

rsrerresserserersererses

5

3.0

3.1

3.2

3.2.1

3.2.2

3.2.3

3.2.4

3.2.5

3.2.6

3.3

3.3.1

3.3.2

3.3.3

3.4

3.5

3.5.1

3.5.2

4.0

41

4.2

4.2.1

4.2.2

4.2.3

Alarms

Temperature
Alarms

In

Heater

Airway
Airway

and

Heater
Wire

temperature

temperature
Chamber
Chamber

Set

Low

Temperature

Heater

WireAlarm.........................

Airway
Airway

Audio
Safety

Temperature

Temperature
Temperature

Alarm

Protection

Microprocessor

Circuit

Introduction

Control

Operation

Board

Control
Input

Analog

Analog

to

Thermistors

Alarm

Alarm.

Heater

ee

Dog

U8

Wire

Alarm..

Alarm

and

U9

U10

b,d,e.

Indicators...

Probe

Alarm

Wire

Mode (MR700/720/730

Alarm........

High
Low

Temp

High

Alarm

Temp

Low

Alarm.

Waming.................

Alarms

in

Non

High
Low

(All

Models)...

Deviations...

Watch

..

Switches

Digital

Converter

Mode

.

only)..

(includes

MR480)..

e.

.6

6
6
6

6
7
7
7
7

8
8

8
.8
.8
.8
.8

…8

9

.9
.9

.9
.9

9

MR730/720/700/480

Technical

Manual

#

Revision D 3#-

Issued

October

1995

CONTENTS

424

4.2.5

4.2.6

4.2.7

4.2.8

4.2.9
43

4.3.1

4.3.2
44

5.0

5.1

5.2
53
54

6.0

6.1

6.2

6.2.1

6.2.2

6.2.3
63

6.3.1

6.3.2

6.3.3
64

6.4.1
642

Processor
Power

Power

41

Heater

Watch

Power

Revision

Revision H PCBs.......

Probe

Temperature

Calibration

Introduction

Equipment
Calibration
Calibration

Performance

Control

Line

Interrupt

Line

Interrupt

°C

Comparator

Plate

Overtemperature..

Dog...

Board......

D/F

.....

...

Required.

Procedure
Procedure

Check

Introduction

Performance Check

Equipment
Static
Dynamic

Performance

Equipment

Static
Dynamic

Dual

Probe

Equipment

Test

Required

Test

Sequence
Test
Check

Required

Test

Procedure
Test

Temperature

Required

Procedure

U3

(Revisions

(Revision H PCB)

PCBs

versus

Thermistor

coroa

for

Models

for

Models

MR730/720/700

..

(MR73

Sequence

(MR480)....

.........

(MR480).

Procedure

Test.

..

....

D/F

PCBs).

Resistance..

ces

with

Revision D PCBs

with

Revision F PCBs

ee

(MR730/720/700

(MR480).

00)

esses

veses

or

earlier

or later...

conse

13

13

13
13

„14

SS

.

15
15
15
16

19

7.0

71

72

7.2.1
722
73
74

7.5

7.6

8.0

8.1
82
83
84

8.5

8.6

8.7

8.8

8.9

8.9.1

8.9.2

Servicing

Introduction

Printed

Control

Power
Replacement
Heater

Fault

Screw

Schematics,

MR700

Component
Component

Component

Link
Circuit
Circuit
Circuit
Circuit

Circuit
Circuit
Electrical

Contro!
Power

Information

Circuit

Board

PCB

PCB

of

Revision D Power & Control

Plate

Location

Torque

Settings.

Part

Series

Circuit

Layout - Revision H PCB
Layout - Revision F PCB..

Layout - Revision D PCB

Pad

Locations

Diagrams - Revision H PCB

Diagrams - Revision H PCB.Power
Diagrams - Revision F PCB
Diagrams - Revision F PCB
Diagrams - Revision D PCB
Diagrams - Revision D PCB

Partslist.................

Board

Components:

Board

Components:

Removal

Lists

Layout

for

Programming

..

PCB

and

Mechanical

Block

Diagram

.....

Control

Control

Control
Power

Control
Power

esere

(Revision H PCB)

(Revision H PCB)...

PCB.

PCB

PCB..

PCB.

PCB

PCB

Assemblies...

Drawings

Options - Revision H PCB

...

.

a

20

CONTENTS

PAGE

8.10

8.10.1

8.10.2

8.10.3

8.11

8.11

8.12

8.13

8.14

9.0

9.1

9.2
93

Appendix

Al

A2
A2.1
A22

A2.3

A3

A4

A5

A6
A6.1

A6.2

A6.3

46.4

A7

Mechanical

MR480

Parts

List

Mechanical

MR730/720/700

Heater

plate

Assembly

Exploded

Exploded
Exploded
PCB

Power

Product

Compatibility
Model

Serial

A.

Calibration

Engineering

Programming

Glossary

Error

MR700

Diagrams:

Diagrams:
Diagrams:Heater

Identification

PCB

Harness

Change

of

Software

Number

Number

Engineering
Engineering
Integral

Codes

Series

Serial

Status

Remote
Serial

Explanation

Explanation

conos

Mode...

sine

Menu

display

Functions:

Display

Control

of

Abbreviations

Humidifier

Data

Format

Information.

Standby

Data

Interface

Diagram

....

Revision F & H PCB

....

Parts

Mechanical

Parts.

Parts

(MR730/720/700/480)

MR480..............

MR730/720/700

plate

Assembly

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

Connection

History.....

and

Hardware

Diagram

.

..

functions:

Options

Serial

Connector.

Schematic

Non

.

Heater

Heater

Data

Diagrams

MR730/720/700/480

.

cerros

Versions..

00000

eeeeeeeen

eee

rn

Wire

Mode.

Wire

Mode

....

Interface

rire

.

(Inverted

eres

View

55

an

.

nn

Appendix

BI

B2

Appendix

C1
C2

B

Recommended

Recommended

C....

Troubleshooting
MR700

veve

Series

Maintenance

Maintenance

κο.

Fault

Guide

Flow

Schedule...................

Schedule

Checklist...

sous

For

The

Chart

MR700
For

No

Series

Go

Condition

Respiratory

Humidifiers.

ce

....63

.6S

MR730/720/700/480

Technical

Manual # Revision D #

issued

October

1995

page

1

1.0

1.1

1.1.1

MR700

This

respiratory

The

MR730/720

The

MR720

The

MR700

The

MR480

ELECTRICAL

MoDELs

Suppiy

Supply

Supply

SERIES

documentation

humidifiers.

has a lower

model

model

MR730/720/700

Voltage:

Frequency:

Current:

GENERAL

defines

models

is

is a non

SPECIFICATIONS

the

are

Heated

alarm

exclusively a Heated

Heated

-

SPECIFICATIONS

technical

limit

specifications

Wire

humidifiers

and

an

extended

Wire

Wire

humidifier.

230V

+25V

127V x 12V

115V

100V + 10V

50 - 60

Hz

1.0 A maximum

1.9 A maximum

2.0 A maximum

2.4 A maximum

of

the

with

the

warmup

humidifier.

at

230V

at

127V

at

115V

at

100V

MR730, MR720,

option

of

disabling

mode

for

use

in

MR700

the

and

Heater

Anaesthesia.

MR480

Wire.

1.1.2

1.1.3

1.2

Heater

Wire

Capacity:

MobeL

Supply

Supply

Supply

COMMON

Heater

Heater

STANDARDS

Classification

MR480

Voltage:

Frequency:

Current:

ELECTRICAL

Plate

Power:

Plate

Overheat

under

AND

60

230V

115V
100V

50 - 60

0.7 A maximum

1.4 À maximum

1.6 À maximum

SPECIFICATIONS

150

Protector:

APPROVALS

UL544,

JEC601-1,

Operates

CSA-C22.2

W

+25V

+10V

Hz

(ALL

MODELS)

W

at

118

No.125

AS3200.1,

at

230V

at

115V

at

100V

°C + 6

°C

BS5724:Part

1,

DIN

VDE

0750

Teil

1

MR730/720/700/480

Class

1

Type

B

Drip

Proof

Continuous

Not

to

be

used

Technical

Operation

in

the

presence

Manual

of

#

Revision D *

flammable

anaesthetics.

issued

October

1995

page

2

1.3

1.4

1.5

TEMPERATURE

PID

(Proportional

heater

plate.

TEMPERATURE

Temperature

fast

response

chamber

measurement

temperature

outlet.

TEMPERATURE

Three

digit

14mm 7 segment

Range

5.0

to

80.0

Accuracy

25.0

to

CONTROL

Integral

SENSING

probes,

DISPLAY

degrees.

45.0

degrees + 0.3

Derivative)

using

control

standard

located

LED

(Light

Below

5.0

degrees

degree.

of

Heater

characteristic

at

the

patient

Emitting

displays

end

Diode)

Wire

(in

Heated

thermistors

of

the

delivery

display.

'Lo'.

Above

(YSI

80.0

Wire

mode

400

compatible)

tube

and

degrees

operation

at

the

displays

only)

and

mounted

in

humidifying

'Hî'.

」

page

3

2.0

2.1

2.1.1

2.1.2

OPERATING

ADJUSTABLE

AIRWAY

Selects

scale

The
when

CHAMBER

The
difference

The

the
+2
Airway

adjustment.

Every

adjustment

replacing

TEMPERATURE

the

airway

marked

temperature

the

control

CONTROL

temperature

between

setting

chamber

°C

of

marked

display

humidifier

of

the

CONTROLS

CONTROLS

controlling

in

degrees

can

knob

of

the
the

the

Chamber

outlet

set

in

one

as

the

is

the

chamber

normal

CONTROL

temperature.

on

the

front

be

set

with a resolution

is

rotated

(HEATER

gas

WIRE

leaving

chamber

Control,

temperature.

degree

steps

control

also

knob

supplied

control

knob

with

AND

panel.

and

continues

ON

the

chamber

outlet

temperature

when

This

Chamber

and

can

is

rotated

with a fixed

by

preadjusting

the

fixed

knob.

MODES

The

range

of

0.1

to

MODE

is

added

be

set

and

chamber

of

adjustment

°C.

The

set

temperature

be

flashed

for

five

ONLY)

regulated

and

to

the

Control
with a resolution
continues

the

by

the

the

airway

setting

of

has a linear

to

be

control

existing

knob.

knob

temperature

the

flashed

is

from

seconds

Chamber

Temperature

range

of

0.5

°C.

for

This

prevents

to

the

desired

29

to

40

is

flashed

after the

Control

delivered

of

adjustment

The

value

five

seconds

°C

over a linear

on

the

display

last

adjustment.

knob,

it

to

the

Control,

determines

from

is

flashed

after

inadvertent

setting

and

sets

the

patient.

-5

to

on

the

last

then

the

2.2

2.2.1

2.2.2

PUSH

SWITCHES

MUTE

BUTTON

A

momentary

heater

wire

mode

A

secondary

engineering

On

every

CHAMBER

For

MR700
Operation
chamber

is

active.

This

For

MR700

Operation

chamber
is

active.

seconds
This

initial

TEMP

of

outlet

On

button

of

outlet

On

before

button

menu

is

is

push

will

disable

which

is

ten

minutes).

function

Series

this

release

used

Series

this

release

used

is

that

in

conjunction

(refer

Appendix

push

of

the

mute

BUTTON

Humidifiers

switch causes

temperature. A green

of

this

switch

in

conjunction

Humidifiers

switch

causes

temperature. A green

of

this

switch

blanking

momentarily

in

conjunction

an

audible

alarm

with

A2).

button a momentary

with

Version

the

airway

temperature

LED

adjacent

the

with

with

the

with

display

Version

airway

LED

the

display

and

reverts

the

mute

2.0

temperature

adjacent

continues

reverting

the

mute

for 3 minutes

the

Chamber

audio

1.0

Software:

display

to

the

switch

immediately

to

enter

the

and

Version

display

to

the

switch

te

show

to

show

to

enter

the

(except

Temp

beep

to

low

switch

indicates

momentarily
is

enabled

to

show

engineering

3.0

Software:

to

momentarily

is

enabled

the

chamber

the

airway

temperature.

engineering

temperature

enables

function

blank

to

indicate

the

airway

menu

(refer

blank

to

indicate

outlet

menu

(refer

alarm

in

entry

to

the

operation.

then

show

that

this

temperature.

Appendix

then

show

that

this

temperature

Appendix

non

the
function

A2).

the

function

for

2

A2).

2.2.3

STANDBY

This
amber
standby

To

beep

BUTTON

button

has

to

LED

starts

to

mode.

exit

Standby

mode

accompanies a change

MR730/720/700/480

(MR700/720/730

be

depressed

flash

press

for

(100/minute)

the

Standby

in

the

Technical

ONLY)

one

second

to

enter

the

button

can

then

button

for

1s,

Standby

mode

state.

Manual # Revision

or

exit

the

be

released

the

amber

D. 3 Issued

standby

and

LED

will

mode.

the

Humidifier

then

October

When

turn

the

off.

1995

adjacent

remains

An

audio

in

the

page

4

2.2.4

2.3

2.3.1

HEATER

This
mode.
Pressing
wire
switching

POWER

VERSION

After
information

.
.

WIRE

is a latching,

The

adjacent

this

alarm

will

to

UP

1.0

switch

is

Watchdog
Display

Temperature
Chamber

9

Software

Maximum

9

Audio

SwiTCH

push

green

switch

will

commence

the

non

heater

SEQUENCES

SOFTWARE

on

the

humidifier

flashed

circuit

Test

Control

Control

Version

Heater

Beep

(MR720,

operated,

cause

MR730

switch

LED,

if

an

audible

if

switching

wire

mode

goes

on,

through

for 2 seconds.

test

Setting

setting

Number

Plate

Setting

ONLY)

which

selects

indicates

to

if a heater

If
All
Airway

eg

If

displayed

that

beep

and

the

heater

wire

the

following

successful

indicator

Temperature

'37.0'

heater

1.0

eg'110'

between

the

humidifier

the

LED

wire

mode

is

connected.

the

'SEE

LEDs

is

displayed

wire

mode

eg

'-1.0'.

the

heater

is

changes

with

no

sequence.

MANUAL'

are

illuminated

display

is

selected

Not

applicable

wire

mode

operating

to

indicate
heater

wire

Note

that

LED

and

then

the

for

and

in

the

heater

the

new

connected

each

displayed

lights

briefly.

'8.8.8.'

is

chamber

MR480

non-heater

wire

wire

mode.

state. A heater

or

if

displayed

control

on

the

setting

is

2.3.2

2.4

VERSION

After
displayed

.

ㆍ

.
9

.
9

2.0

switch

for 2 seconds,

Watchdog

Display

Model

Software

Temperature
Chamber

Maximum

Audio

HEATER

In

regulated

condensation.

adjusted

knob

the

WIRE

Heater

to

to

is

used

maintain

control

AND

on

the

Test

Number

Version

Beep

ON

Wire

To

for

this

circuit

Control

Heater

minimise

VERSION

3.0

humidifier

then

test

Number

Control

Setting

setting

Plate

MODE

On

Mode

the

desired

(ALL

rainout

at a fixed

purpose,

SOFTWARE

goes

through

the

display

Setting

MODELS

(heater

temperature

or

offset

from

see

2.1.2

is

momentarily

If

successful

All

the

eg

'730°

eg

'2.0'

eg

'37.0'

If

heater

is

displayed

ερ

110'

wire

switch

maximise

the

above.

the

following

the

indicator

Airway

EXCEPT

set

LEDs

Temperature

is

displayed

wire

mode

eg

MR480)

green

LED

and

humidity,

humidification,

airway

temperature.

sequence.

blanked.

'SEE

MANUAL'

are

illuminated

is

selected

'-1.0'.

Not

on)

the

within

the

Note

display

then

applicable

heater

close

chamber

The

front

that

each

LED

lights

and

'8.8.8.'

the

chamber

for

MR480

plate

and

limits

with a minimum

outlet

panel

information

briefly.

is

displayed

control

heater

wire

temperature

Chamber

Control

is

on

setting

are

of

can

be

2.5

MR730/720

In

the

non

Heater

temperature

heater

plate

backup

at

low

safety

flow

IN

HEATER

Wire

mode

is

maintained

to

deliver

mode,

rates

the

to

limit

(below 5 L/minute)

WIRE

of

the

by

heater

selected

temperature.

the

chamber

OFF

MODE

MR730/720

plate

control

outlet

is

enhanced

AND

MR480

(heater

The

temperature

only.

sensor

at

the

wire

The

sensor

at

to a maximum

sacrifice

switch

at

the

chamber

of

green

the

some

LED

off)

delivery

outlet

of

66

low

flow

the

delivery

hose

end

controls

is

employed

°C.

In

this

way

performance.

in

a

safety

the

page

5

2.6

2.6.1

2.6.2

2.6.3

WARM

The
conditions

UP

Low

temperature

are

MODE

met:

MR700/MR730

the

airway

the

airway

software)

e

the

airway

MR700/MR730

the

airway

the

airway

the

airway

further

Note:-

switches

And a low

MR720

15

In

this

mode

on.

At

temperature

WITH

VERSION

minutes.

alarm

AND

MR720(VERSION

temperature

gets

temperature

temperature

AND

MR720(VERSION

temperature

temperature
temperature

the

this

audio

time

alarm

gets

the

2.0/3.0

is

disabled

within

does

not

increase

does

not

get

above

does

not

increase

increases

alarm

is

heater

plate

mute

is

for

SOFTWARE

during

1.0)

IN

0.8

degrees

within 2 ºC

1.0)

IN

30

°C

by 2 °C

not

enabled

circuit

10

minutes,

warm

up.

HEATER

of

by 2 °C

of

NON

HEATER

by 2 °C

within

for

switches

during

It

is

enabled

WIRE

MODE

the

temperature

within 4 minutes

the

set

point

within

WIRE

MODE

within

15

minutes

15

minutes

30

seconds

but

still

after

off.

which

the

as

soon

control

(2

minutes

.

ten

AND

has not

the

Airway

heater

as

any

setting.

for

minutes

MR480

reached

Temp

plate

is

of

the

following

version

of

switch

30

°C

Low

enabled.

3.0

after

LED

on.

a

2.7

2.7.1

2.7.2

If

the

above

mode

for

20

STANDBY

MODE

MR700/MR730

The

standby

be

emitted

In

the

nominal

Standby
warm

A

Remote

LED

MR720

The
warm

for

While

a) If
enter

the

b)

If

completion

conditions

once

standby

40.0

mode

up

mode

Standby

permanently

STANDBY

MR720

up

conditions

version

unit

3.0

in

standby

the

airway

warm

re-enters

the

airway

and

up

of

warm

up

conditions

minutes

mode

for

version

AND

MR720

can

be

successful

mode

all

Low

°C

and

the

is

automatically

is

entered

request

on.

MODE

has a special

are

not

mode:

temperature

mode.

The

Standby

temperature

the

standby

if

these

are

are

2.0

(VERSION

entered

or

entered

or

Temperature

heater

wire

exited

(the

low

temperature

(see

Appendix

(VERSION

feature

where

met.

This

increases

unit

then

mode.

has

not

period,

not

initial

met,

not

initially

software

1.0)

exited

by

exited

standby

alarms

is

on a 15%

after

20

A6.3)

2.0

AND

it

will

standby

by 2 °C

rechecks

increased

warm-up

the

unit

alarms.

met

the

and

30

minutes

ONLY

depressing

mode

are

inhibited,

duty

minutes

alarms

remain

enables

3.0

SOFTWARE

go

into a standby

mode

time

at

any

time,

warm-up

exiting

by 2 °C

resumes.

MR720

for

the

standby

(refer

cycle.

(30

minutes

disabled - refer

the

standby

ONLY)

is

20

minutes

the

conditions

or

come

The

will

automatically

version

3.0

button

2.2.3)

the

heater

for

version

mode

mode

automaticaliy

for

MR720

will

and

within 2 °C

unit

then

rechecks

enter

the

standby

software

(refer

2.7).

for 1 second. A beep

plate

is

3.0

section

and

turns

version

exit

stand

if

these

of

the

warm-up

controlled

software)

2.6).

the

after

2.0

are

set

to

and

standby

turn

and

30

by

mode

not

met, then

temperature

exiting

will

a

the

amber

on

if

the

minutes

and

by

MR730/720/700/480

Technical

Manual # Revision D #

Issued

October

1995

page

6

3.0

3.1

ALARMS

AND

TEMPERATURE

If

the

airway

temperature

Probe

alarm

will

flashing
Five
display,

(a)

(b)

(©)

(d)

Temperature

specific

as

shown

fault

--- . Temperature

---,

--.-

-

-.-.

INDICATORS

PROBE

be

types

below:

Low

Open
Open

Open

Very

Short

Very

Short

Very

ALARM

probe

enabled.

Probe

red

can

be

temperature

circuit
circuit

circuit

low

temperature

circuit

high

temperature

circuit

high

temperature

Indication

is

disconnected

LED

and

diagnosed

Probe

not

(~0

chamber
in

common

patient

airway

chamber

patient

airway

is

by

an

audio

and

plugged

°C)

outlet

lead

probe

(~0 °C)

outlet

(~100

probe

(~100

or

develops a low

a'-

- -'

message

alarm.

are

displayed

in.

probe

in

probe

probe

°C)

°C)

on

by

cable.

or

the

airway

the

sequence

high

resistance

the

Temperature

temperature

of

‘decimal

points’

display

plus

in

a

the

3.2

3.2.1

(e)

The

faults

does

not

A

Temperature

Once

the

ALARMS

HEATER

If

the

heater

alarm

LED

~

circuits

the

heater

An

open

On

MR720/730

2.9.4).

Note:
If

'F-2'

section

-.- - Short

(a

to

d)

above

immediately

Probe

alarm

condition

IN

HEATER

WIRE

ALARM

wire

is

disconnected

will

start

will

be

shutdown.

wire

fuse

is

circuit

heater

if

the

is

displayed

and

5).

in

probe

are

checked

cause

any

Alarm

immediately

has

been

WiRE

Mope

flashing

and

The

open

circuit).

wire

fuse

Heater

Wire

the

F2

cable

between

for

apparent

removed

(MR700/720/730

or

there

the

audio

display

is

indicated

is

connected

fuse

is

intact

will

patient

at a rate

of

operating

shuts

down

the

humidifier

is a fault

alarm

wili

continue

by

‘F-2'

but

then

check

airway

about

twice

anomaly

both

heater

will

with

the

heater

be

enabled.

to

indicate

appearing

switched

the

calibration

probe

per

is

checked

wire

enter

onLy)

wire

Both

the

temperature

on

the

off,

the

and

chamber

second.

The

twice a minute.

and

heater

warm

up

mode

circuit,

then

heater

wire

sensor

Airway

alarm

of

will

the

Temperature

sound

41°C

outlet

probe

final

fault

plate.

(refer

the

Heater

and

reading

(refer

overheat

(e)

section

Wire

heater

(unless

display.

section

(refer

which

2.6).

plate

3.2.2

AIRWAY

The

delivered
instantly

TEMPERATURE

red

Airway

to

disables

Temp

the

patient

both

HIGH

High

LED

is

2°C

heater

ALARM

will

flash

higher

than

circuits.

and

an

audible

the

Temperature

alarm

will

Control

sound

if

the

gas

setting. A high

temperature

temperature

alarm

being

page

7

3.2.3

3.2.4

AIRWAY

The

red

Airway

delivered

Notes:
If

Airway

heater

wire

heat

for a further

This

alarm

CHAMBER

This

alarm

1)

The

chamber

Temperature

2)

The

temperature

This

alarm

start

flashing.

the

high

temperature

TEMPERATURE

Temp

to

the

patient

Temperature

circuits

is

TEMP

will

temperature

will

100

disabled

HIGH

activate

of

set

temperature

Control

temperature

causes

by

10

the

The

audio alarm

of

condition

LOW

ALARM

Low

LED

is

2°C lower

Low

alarm

switch

seconds,

during

ALARM

if:

gas

leaving

for

setting

the

gas

°C

or

more.

heater

circuits

will

flash

(4°C

condition

off.

Pressing

the

Airway

warm-up,

the

more

and

the

leaving

to

(which

is

cleared.

and

an

audible

for

MR720

persists

the

Temperature

see

section

mute

2.6.1.

model)

for

button

humidification

than

20

minutes.

Chamber

the

switch

can

Control

humidification

off

and

be

muted)

is

alarm

than

more

than

will

Low

LED

chamber

(The

chamber

setting).

chamber

the

Chamber

also

enabled.

will

sound

the

Temperature

100

silence

will

outlet

is

set

outlet

Temp

This

if

the

seconds

the

Audio

continue

more

than 4 °C

temperature

exceeds

High

alarm

gas

temperature

Control

the

heater

alarm

to

flash..

is

the

chamber

amber

LED

remains

setting.

plate

and

resume

higher

the

sum

indicator

active

being

and

than

of

set

until

the

the

to

3.2.5

3.2.6

CHAMBER

This

alarm

For

Chamber

The

temperature

chamber

OR

For

Chamber

The

temperature

minutes.

THEN:

The

Chamber

muted)

mute

SET

Version

This

LED

is

button

LOW

alarm

will

adjusted

Temp

Low

will

activate

Set

Temperature < 35°C

of

set

temperature

Set

Temperature > 35°C

of

Temp

enabled.

will

silence

WARNING

1.0

and

Version

will

activate

immediately

above

31.0

ALARM

gas

leaving

gas

leaving

Low

This

be

°C.

if:

for

more

alarm

alarm

the

Audio

2.0

Software

if

the

enabled

There

the

humidification

than

20

the

humidification

amber

LED

remains

active

alarm.

chamber

is

and

remain

no

audible

set

chamber

minutes.

chamber

will

begin

to

until

the

low

temperature

on,

until

is

such time

alarm.

outlet

is

less

outlet

is

less

flash

and

the

temperature

below

31.0

as

the

than

than

audio

condition

°C.

In

this

chamber

4°C

31°C

alarm

is

case

set

lower

than

for

more

(which

can

cleared.

the Set

temperature

the

than

20

be

Pushing

Low

amber

is

the

Version
This

3.0

alarm

Software

will

34.0°C.
In

these

cases

set

airway

or

chamber

MR730/720/700/480

activate

the

Set

Low

if

either

the

amber

LED

temperature

Technical

is

chamber

will

immediately

adjusted

Manual

set

temperature

above

34.0

#

Revision

or

be

enabled

°C.

D #

Temperature

and

remain

There

is

no

Issued

control

on,

audible

October

setting

until

alarm.

1995

is

such

below

time

as

the

page

8

3.3

3.3.1

3.3.2

3.3.3

3.4

TEMPERATURE

HEATER

This
(Heater

begins

AIRWAY

The
delivered

AIRWAY

The

delivered

Notes:

The

Pushing

the

This

AUDIO

WIRE

indicates

Wire On

and

the

TEMPERATURE

red

Airway

to

the

TEMPERATURE

red

Airway

to

the

audio

alarm

the

mute

Airway

alarm

Temp

is

ALARM

disabled

ALARMS

ALARM

that a heater

LED

heater

Temp

patient

Temp

patient

is

not

button

Low

wire

is

off). In

plate

is

HIGH

High

is

41°C

LOW

Low

is

29.5

enabled

disables

LED

during

IN

NON

has

this

switched

ALARM

LED

will

or

higher.

ALARM

LED

will

°C

or

for

30

the

will

continue

warm-up,

HEATER

been

connected

case

the

off.

flash

Power

flash

less.

seconds

audio

to

see

WIRE

Heater

and

an

to

and

an

after

alarm

and

flash.

section

MODE

when

Wire

audible

the

heater

audible

the

low

restores

2.6.2.

(INCLUDES

the

non

heater

alarm

LED

alarm

will

sound

plate

is

immediately

alarm

will

sound

temperature

power

to

wire

will

LED

the

MR480)

mode

be

flashing,

if

the

gas

shut

if

the

gas

begins

heater

plate

has

been

selected

the

audio

temperature

off.

temperature

flashing.

for

ten

minutes,

alarm

being

being

3.5

3.5.1

A

choice

of

the

ISO

draft

control

A

a

until

audio

SAFETY

TEMPERATURE

‘An

of a Low

however

There

Firstly,

monitors
at

Secondly, a bimetallic

exceeds

by

Heater

heater

link

momentary

low

temperature

the

alarm

alarm

PROTECTION

over

temperature

Temperature

remains

are

two

an

the

41.0

degrees.

118

gaining

plate

plate

(L1),

refer

depression

alarm

condition

to

be

re-enabled.

DEVIATIONS

on

independent

over

temperature

airway

°C + 6

°C

access

to

temperature

limits

of

alarm condition

until

thermistor

the

50,

standard

Appendix

of

the

mute

in

no

heater

clears.

alarm,

(ALL

the

backup

Any

MODELS)

pressing

fault

protection

sensor.

thermostat

and

opens

under

surface

is

limited

80

and

90

audio

A3.

button

wire

new

causes

has

over

fixed
the

mains

to

°C

110

alarm

or a gliding

will

mode,

alarm

an

immediate

Mute

causes

cleared.

temperature

circuit

independent

This

backup

to

the

heater

active

of

the

heater

°C

max

can

be

selected.

silence

the

see

3.3.3.

condition

heating

protection

protection

plate

supply.

plate

and

during

normal

(Refer

tone

can

audio

alarm

The

relevant

occurring

shut

down

to

recommence,

circuits.

of

the

microprocessor

is

preset

operates

On

if

cooling,

manually

operation

Appendix

be

selected

within a mute

of

both

to

the

this

by

for

about 3 minutes

LED

indicators

heater

the

Low

disconnect

heater

plate

protector

depressing

(80

°C

A3.)

the

programming

remain

delay

circuits.

Temperature

control

continuously

the

temperature

can

the

red reset

for

MR720).

(except

will

cause

In

heating

only

be

button.

for

flashing

the

the

case

LED

circuits

reset

Optional

3.5.2

MICROPROCESSOR

A

control

detected a hardware
additional

LED
The

on.

watch

loop

in

the

hardware

dog

circuit

WATCH

DOG

operating

reset

circuit

disables

is

tested

the

software

attempts

heating

at

turn

on

continuously

to

re-initialise

circuit,

by

deliberately

monitors

blanks

for

the

microprocessor.

the

display and

halting

the

correct

operation.

turns

the

processor

If

this

is

Humidifier

and

forcing

Should a fault

not

successful

Fault

be

red

initialisation.

page

9

4.0

41

4.2

4.21

CIRCUIT

INTRODUCTION

This

in

Sections

CONTROL

The

one

for

the

software

CONTROL

Three

dual

1. . A

OPERATION

section

temperature

describes

8.6

BOARD

basic

MR730/720/700/480

version.

THERMISTORS

standard

thermistor
temperature
humidifier

2. A second
humidifying

control

3. A third
J3-1,3).

the

thermistor

This

briefly

the

to

8.8.

control

thermistor

board,

with

range

characteristic

probe

is

mounted

(connector

front

panel.

thermistors

sensor,

in a probe

J4-1,3).

mounted

chamber

chamber

prevents

(connector

outlet

is

permanently

excessive

operation

various

discreet

of

humidifiers.

control

another

thermistor

at

the

This

temperature

in a probe

J4-2,3).

temperature.

mounted

heater

of

each

of

hardware

Each

all

temperature

monitors

end

of

the

measures

In

heater

in

intimate contact

plate

temperatures

the

circuit

sections.

changes, provides

model

however

functions.

the

heater

delivery

is

indicated

the

wire

hose

chamber

mode

during a warm

Refer

is

controlled

Two

plate

temperature.

to

measure

by

the

digital

temperature

this

thermistor

with

the

heater

up

to

the

circuit

the

controlling

by a unique

thermistors

delivered

display

at

the

top

is

used

plate

cycle.

on

to

(HP)

diagrams

functions

are

used

airway

the

of

the

monitor

(connector

in

a

and

4.2.2

4.2.3

INPUT

ANALOG

SWITCHES

The 1 by 8 analog

reference

potentiometer

across

From
chamber

ANALOG

The

suppression.
pass
voltage
with

discharged

gain

Under

ramps

referenced

level

the

potentials.

VR3,

resistors

the 3 by 2 analog

temperature

outlet

TO

DIGITAL

R18,

temperatures

probe

The

operational

amplifier

transients

R35

connected

state.

of

about

0.5

processor

up

of

UI0d

speed

control

(0.1-5ms).

via

R41

the

up

capacitor

U8

AND

switch

(U8)

selects

Selected

and

R17

CONVERTER

selected output

sequentially

offset

potentiometer

and

R16,

switch

(U9)

from

inputs

are

filtered

of

with a gain

appearing

(through

With

giving a resting

to

output

VR5

(PB6)

This

the

of

C24,

at

its

an

and

when

rising

output

the

comparator

is

fed

input.

analog

R34

level

ramp
voltage

US

under

and

from

under

the

dual

U10

B,D,E

the

analog

of

11.

The

switch

connected

of

the

switch

voltage

level

to

the

RST

processor

are

potentials

VR2.

(7):

the

processor

probe

temperature

by

the

C30, C31,

switch

This

stage

integrating

in

U9)

to

about

-2.5

section

is

fed

of

U10d.

stage

U10e

6.5

interrupt

control

(PB0-3)

giving;

(4-6):

calibration

heater

plate

control

(PB4-6)

R28,

network

is

filtered

stage

U10b

across

the

the

non-inverting

to

-3

volts

of

U9

across

via

R36

to

When

switches

input

various

(0-3):

the

temperatures

(HP)

thermistor.

the

airway

sensor

U8,

R26,

U9

with

are

C19,

is

fed

C23

rests

for

integrating

input

at

the

output

C22

is

the

comparator

the

ramp

voltage

high.

This

of

U3.

input signals

position

of

temperature

also

read.

C20

network

to

pin

to

give

most

of

capacitor

of

U10b

pin

1.

opened

stage

exceeds

fast

rising

and

of

the

temperature

9,

34.5

and

and

for

EMI

10

of

U10d, a low

protection

the

C22

the

the

U10e

edge,

from

time

(50-60ms)

holding

stage

has a ‘static’

output

of

where

the

threshold

assisted

60

°C

the

any

it

ina

U10b

it

is

by

set

4.2.4

PROCESSOR

After

selecting

pause

linear

will

cause a RST6.5

MR730/720/700/480

to

allow

ramp

CONTROL

output

one

U10d

and

U3

of

the

10

to

settle.

the

14

interrupt

Technical

input

At

this

bit

counter

to

occur.

signals

point

in

The

Manual

through

the

switch

U4

is

processor

№

the

switch

across

started.

on

responding

Revision

network

the

Within a time

D. # issued

of

integrator

to

U8,

U9

U10b

period

the

interrupt,

October

there

is

of

100ns

is a

50-60ms

opened

to

first

stops

1995

initiating

Sms

the

a

ramp

the

counter,

network

equated
during

calibration

then

U8,

to

the

calibration

performed,

U9

input

closes

can

now

signal.

to

give

the

switch

be

stepped

In

the

desired

and

the digital

this

across

to

the

way

all

ramp

display

page

the

integrator
next
10

input

rate.

updated.

10

input.

channels

Thus

readying

The

14

all

points

it

for

bit

counter

are

continuously

are

scanned

the

next
can

once

now

cycle.

The

be

read

scanned.

every

input

switch

and

its

value

VRS

is

set

500-600ms,

self

4.2.5

4.2.6

4.2.7

POWER

A

R56
software
enabling a zero
frequency

Power

The

ground
any

frequency

triac
common

41

Operational

inverting

inverting
ensure

(OVHT)
switching

both

A

resistor

clamped

LINE

sample

of

and

O1,

determines

thus

LINE

zero

crossing

referenced

unwanted

facilitating

switching.

error

°C

COMPARATOR

input

input

that

the

is

fed via the

transistors

heaters

watch

dog

R31

off

INTERRUPT

the

buffered

INTERRUPT

amplifier

to

failure,

to

in

power

supply

by

the

supply

crossing

eliminating

is

derived

when

noise

from

the

The

ADC

from

this

source.

U10c

pin 5 is

goes

output

connected

to

an

pin 7 of

isolating

Q10

be

shut

down.

which

the

inverting

the

event

(REVISIONS

frequency

Schmitt

detector

any

D/F

trigger

frequency

for

triac

common

is

USf

facilitating

switching.

error

(REVISION H PCB)

from

the

10Vac

the

diodes

D13 - D16

the

zero

crossing

generation

is

also

is a protection

adjustable

and

is a high

input

of a processor

phase

directly

U10c

diode

Q12.

of

of a real

synchronised

circuit

(via

divider

is

low

resistor

In

this

output

U10c.

crash.

PCBs)

derived

circuit.

above

way, a patient

from

from

and

fed

to
the
The

from

this

secondary.

are

not

The

time

clock

with

to

sense

connector

network

an

R32,

input

networks

USg,

This

also

ensures

the

the

generation

ADC

source.

Resistor

conducting.

operating

and

excessive

J4-1)

temperature

D19,

airway

is

communicated

power

RST7.5

is

also

R61.ensures

software

also

enabling a zero

the

line

to

the

VR4,

R33.

R55

and
temperature

that

both

transformer

interrupt

of a real

Network

of

time clock and

phase

synchronised

Ri,

that

determines

frequency

delivery

patient

VRA

of

41

D20,

thus

temperature

airway

is

set

°C.

R61

greater

via

isolating

heater

control

22Vac

secondary

U3.

The

operating

the

secondary

R69,

and

the

supply

crossing

eliminating

rise.

thermistor.

during

calibration

This

low

to

clamp

the

than

diode

circuits

via

also

with

the

is

C2

removes

detector

any

The non

The

output

bases

41°C

causes

D11

and

are

line

for

to

of

4.2.8

4.2.9

HEATER

Thermistor

plate
cools

maximum
Also

electronic

primary
mechanical
heater

WATCH

During

the

wave,

13

through
input

nature

initialise,
deliberately
the

and

PLATE

HP

limit

(default

below

heater

mounted

control

and

plate

DOG

operation

state

of

output

buffered

of

USg

is

R3

forces

of

the

it

fails

processor

also

tums

OVERTEMPERATURE

senses

the

heater

110

°C)

during

this

limiting

plate

on

thus

causes

cut

out

module.

by

held

giving a high

re-initialisation

fault.

in a safe

halting

has

off

temperature.

temperatures

the

heater

system

complete

must

be

the

processor

port

PB7

USb,

is

hard

up.

The

purpose

program

failed

the

the

display

plate

fail.

manually

of

fed

Should

output

of

mode.

execution

high

plate

temperature.

normal

Under

can

is a mechanical

This

mechanical

shut

down

reset

is

continually

U4

every

to

the

charge

this

square

from

pin

the

processor

of

this

is

The

watch

and waiting

output

of

I.C.

U7

to

blank

operation,

certain

be

selected.

118

cut

of

the

by

means

monitored

16.6

or

20ms

pump

wave

12,

which

which

to

ensure

dog

circuit

U5g

also

the

Should

the

power

operating

(See

Appendix

°C

cut

out

is

connected

humidifier

of

the

reset

for

(power

circuitry

may

that

for

digital

C16,

be

interrupted

drives

the

or

may

if

the

is

tested

initialisation

turns

on

display.

heater

plate

to

the

heater

plate

conditions,

A3:

out

which

will

in

series

should a serious

button

located

correct

function.

line

frequency

D4,

DS

for

trap

interrupt input

not

be

processor

every

time

via the

Q3

which

and

any

successful

should

lights

exceed

the

is

discontinued

for

increased

Programming

give

protection

with

the

fault

on

the

This

is

interrupt).

C15

which

reason,

depending

fail,

the

humidifier

watch

the

'see

C15

of

and

dog.

maximum

safety,

Control

should

power

transformer

develop.

underside

done

by

This
ensures

will

discharge

U3.

This

is

unable

is

tumed

To

indicate

manual’

heater

until

it

lower

Options.)

the

The

of

the

changing

square

that

pin

high

trap

on

the

to

re-

on

that

LED10

by

page

11

43

4.3.1

4.3.2

POWER

Revision

A

circuit
stabilized

The

the
UA

The

signal,

connected

Wire.

Тнас
Q12,

Transistors

BOARD

D/F

PCBs

bridge

rectifier

is

protected

by

Q8,

Heater

Wire

optoisolator
on

the

control

resistor

with

ОП

and

R52

processor

or

open

(mounted

HPC.

Q5

and

U11

REVISION H PCBS

A

bridge

rectifier

circuit

is

protected

stabilized

by

O8,

(D13-D16)

by a 1

Amp

is

derived

(HHC)

is

which

from

controlled

in

board.

connected

to

interpretation,

circuit

and

on

the

heatsink)

Q6

are a RS232

(D13-D16)

by a 1

is

derived

supplies

Amp

from

supplies

turn

the

fuse

the

is

anode

power

(Fi)

voltage

by

driven

provides

also

the

integrity

is

level

power

fuse

(F1)

the

voltage

to

the 5 volt

mounted

on

doubling

triac

Q9

which

by

Q10.

of

Q9

provides a signal

the

information

of

fuse

controlled

driver

mounted

by

for the

to

the 5 volt

on

doubling

regulator

the

circuit

network

is

mounted

O10

is

Q7

board.

D17, D18.

controlled

through

to

determine

F2, the 4 Amp

optoisolator

serial

regulator

the

circuit

network

U12,

data

interface.

Q7

board.

D17,

mounted

The 5 volt

on

the

directly

(HHS)

fuse

which

mounted

The 5 volt

D18.

on

the

negative

heat

sink.

from

an

to

USd

if

the

Heater

supplying

in

turn

on

the

power

negative

heat

sink.

supply

Q9

is

switched

output

and

U4.

Wire

is

to

the

is

controlled

heat

sink.

supply

This

port

This

Heater

by

This

by

of

The

Heater

the

optoisolator,

U4

on

balance

Heater
D21,
triac

not

connected

cycle.
interpretation,
also

Q11
output

with

Transistors Q5

Wire

the

control

the

heater

wire

sensing

R66

and

off

and a heater

The

output

the

integrity

controls

port

(HPC)

C33

form a snubber

R67.

then

provides

power

(HHC)

U11,

board

of

and

wire

is

R51

the

of

fuse

to

on

Q6

is

controlled

which

in

turn

(HHC).

with

accomplished

and

wire

Resistor

respect

R52

connected

optoisolator

the

optoisolator

the

information

F2, the 4 Amp

the

heater

plate

U4

on

the

control

for

the

triac

are a RS232

by

is

driven

to

ground.

through

limit

then

will

feeds

and

and

level

triac

Q9

by

R9,

C6

the

the

current

the

optoisolator

be

turned

U4

to

determine

fuse

supplying

is

under

board.

the

optoisolator.

driver

which

is

mounted

Q10.

Q10

form a snubber

optoisolator

through

will

on

and

off

on

the

control

if

the
power

control

Resistors

for

the

R64,

serial

on

the

is

controlled

on

the

U13

and

associated

the

LED

when

remain

in

board.

Heater

to

of

optoisolator

R57

data

off.

synchronisation

This

Wire

is

the

Heater

limit

interface.

heat

sink.

directly

triac.

Capacitors

the

triac

Otherwise

with

signal,

connected

Wire.

U12

and

the

gate

O9

is

from

an

output

C8,

components

is

on

or

if a heater

the

secondary

with

processor

or

open

transistor

current

to

switched

port

C32

R51,

off.

With

wire

circuit

Q12

via

the

triac

by

of

R52,

the

is

and

an

and

MR730/720/700/480

Technical

Manual

Revision D #

Issued

October

1995

page

12

44

PROBE

TEMPERATURE

TEMP

CO

0

9
28
29
30
31
32
33
34
35

VERSUS

RESISTANCE

THERMISTOR

(Ohms)

7352.8

4702.2

1976.6

1893.3

1814.4

1739.2

1667.2

1598.2

1532.9

1470.6

RESISTANCE

TEMP

CC)

36
37

38
39
40
41
42
43

44

60

RESISTANCE

(Ohms)

14113

1355.0

1301.0

1249.2

1199.6

1152.3

1107.3

1064.5

1023.1

560.3

page

13

5.0

5.1

5.2

CALIBRATION

INTRODUCTION

Calibration

calibration,

Note:

Calibration
There

the A to D converter.

This
error

any

repair

with

Calibration

calibration

EQUIPMENT

1)

should

be

performed

perform a performance

For

instructions

is

facilitated

are

only

two

adjustments

calibration

messages

the A to D converter

procedure

in

the

that

may

have

should

be

performed

display)

checked

after

REQUIRED

41

°C

calibration

probe,

after

check

on

disassembly

by

entering a special

VR4

may

be

carried

or

if

any

altered

the

potential

would

require a calibration

and

performed

the

unit

has

available

any

of

the

and

VR5,

of

warmed

in

MR700

as

out

the

servicing

involving

outlined

unit,

refer

Calibration

the

41

if

the

unit

circuit

boards

of

the

+5

after

the

up.

series

the

in

section

to

6.0.

Section

mode.

°C

comparator

is

thought

have

or

-5

volt

check.

unit

has

been

calibration

printed

7.0

Servicing

See

Appendix

stage

to

be

been

replaced

rails

or

running

kit

(F

circuit

boards.

Information.

Al.

and

the

out

of

calibration

or

component

for

at

dz P part

After

setting

of

(E0x-E7x

repaired.

change

least

half

no.

900MR548).

the

span

of

In

particular

associated

an

hour;

ie

5.3

Models

2)

3)

CALIBRATION

(See

1)

2)

3)

Before

Heater

For

MR480

with a 100mm

product

With

models

Wire

switch

Plug

in

Gain

access

humidifier

4)

With

model

the

control

5)

With

the

6)

Using

the

7)

Adjust

off

VR4

Serial

Wire

module.

only - jumper

length

PROCEDURE

change

MR730/720/700

is

on

the

41

°C

to

the

front

MR480

board.

Chamber

Chamber

VR4

slowly

and

recheck

Number

92XXAAA05495

connector

of

cable

and a 22K

FOR

history - section

ensure

(Heater

calibration

Wire On

adjustment

probe.

potentiometers

panel.

only

connect

Temp

button

Temp

button

so

the

display

that

VR4

is

cable,

MODELS

9.0

for

that a Heater

LED

the

jumper

held

down

step

through

just

changes

not

rotated

(Revision D PCB

which

consists

resistor.

WITH

REVISION D PCBS

serial

number

should

be

VR4

cable

turn

on

to

number

from

past

this

details).

Wire

module

on).

and

VRS,

from

pin 7 of

the

power

-4-

vertical

display

and

of

two

easy

is

connected,

by

removing

U10

switch.

to

horizontal

transition

earlier)

hooks

OR

EARLIER

the

to

the

cathode

Display

bars

point.

connected

and

that

the

control

end

should

(||||||

to

board

show

===).

in

series

Heater

from

of

D7

-1-

the

on

Back

8)

Using

the

Chamber

9)

Remove

10)

Adjust

11)

Calibration

the

41

VR5

for a display

is

MR730/720/700/480

Temp

°C

calibration

complete;

Technical

button

probe.

reading

do

performance

step

to

number

-5-

of zero. ( 0)

check

(section

6.0).

Manual # Revision D #

issued

October

1995

page

14

|

5.4

CALIBRATION

(See

product

Plug

Gain

in

access

1)

2)

humidifier

With

3)

4)

5)

the

Using

the

Starting

rotated
where

all

Using

6)

7)

8)

9)

the

Remove

Adjust

Calibration

PROCEDURE

change

the

with a vertical

too

the

VRS

history - section

41

°C

calibration

to

the

adjustment potentiometers

front

panel.

Chamber

Chamber

far

the

display

the

segments

Chamber

41

°C

calibration

for a display

is

complete;

Temp

Temp

Temp

FOR

probe.

button

button

bar

display

becomes

of

the

all 8 display

button

probe.

reading

do

performance

MODELS

9.0

for

held

down

step

through

adjust

all

step

to

of

zero. ( 0)

WITH

REVISION F PCBS

serial

number

VR4

turn

on

to

number

VR4

so

the

horizontal

number

check

are

of

bars

equal

-5-

(section

details)

and

VRS,

the

power

-4-

display

((j.||.||.

brightness.

6.0)

by

removing

switch.

changes

thru

8.8.8.

OR

LATER

the

Display

to

an

all 8 display.

to

==).

control

should

The

board

show

correct

If

from

-1-

VR4

point

the

is

is

page

15

6.0

6.1

PERFORMANCE

INTRODUCTION

This

procedure

humidifiers

servicing
(see

Appendix

Performance

Appendix

The

Performance

For

the

Initially

test.

The

second

heater

For

the

and a probe
its

entire

While

supply

through

without

involving

can

A2.

Static

Test,

the

heater

part

plate

will

Dynamic

assembly.

length

testing

the

but

the

the

chamber

B).

chamber

CHECK

may

be

used

dismantling

the

printed

be

monitored

test

consists

the

humidifier

plate

of

the

Static

be

at

maximum

Test,

the

The

to

the

top

Heated

inlet

and

to

check

circuit

during

of

will

get

Test

humidifier

delivery

of

the

Wire

models,

must

up

the

the

operation

the

unit.

This

boards, and

the

test

by

two

main

parts,

is

first

run

with

warm,

but

should

checks

the

over

temperature.

with a chamber

tube

should

chamber.

the

chamber

be

unobstructed.

delivery

tube

by

and calibration

performance

annually

using

the

fixed

be

as

the

functions

Static

Test

inputs

relatively

temperature

is

fitted

be

supported

does

not

The

purpose

convection.

of

the

check

should

part

of

the

of

and

the

to

check

cold

at

protection.

with a Heater

from

above

require

of

to

this

MR730/720/700/480

be

performed

routine

maintenance

the

Engineering

Dynamic
for

the

be

set-up

correct

end

of

At

the

Wire

so

that

filled

with

is

to

Test.

heater

the

first

end

of

delivery

it

drops

water

establish

after

any

procedure

Menu.

this

plate

part

test

tube

See

control.

of

this

the

assembly

vertically

or

have a gas

an

air

over

flow

6.2

6.2.1

6.2.2

The

MR730/720

model

MR480

PERFORMANCE

Ensure
See

NOTE:

EQUIPMENT

2)

3)

4) A humidification

STATIC

Connect

humidifier

2)

section

1)

34.5

Delivery

Dual

1)

Plugina34.5

Tum

the

Please

°C

TEST

the

is

to

be

is

tested

CHECK

MR730/720/700

6.4

for

testing

ensure

that

REQUIRED

Test

probe,

hose

and

probe

assembly.

chamber

SEQUENCE

Heater

Wire

or

the

delivery

degree

the

Temperature

heater

tested

in

the

Heater

slightly

differently.

MR730/720/700

model

has a suitable

of

MR480.

the

procedures

available

in

MR700

wire

assembly

without

scroll.

(MR730/720/700)

cable

to

the

humidifier.

tube

to

the

humidification

test

probe.

Control

knob

to

Wire

See

are

followed

series

(1.1

33.0

on

mode

section

Heater

correctly

calibration

to

1.3

metre

(Not

an

MR390.)

Do

not

chamber

+ 0.2

degree

(green

6.4.

Wire

at

module

to

kit

Adult).

this

stage

outlet.

and

LED

on).

connected.

avoid

(F & P

connect

Chamber

The

non

misleading

part

no.

900MR548).

the

probe

Control

Heated

test

assembly

to

0.

Wire

results.

to

the

3)

Turn

on

the

4)

Check

the

initialisation.

5)

Check

display

6)

Push

Chamber

MR730/720/700/480

humidifier

mains

Temperature

reading

temp.

of

button

Technical

power

Control

34.5 + 0.2

and

and

Chamber

after

check

Manual

switch.

Control

initialisation

for

34.5 + 0.2

#

setting

and

that

degree

reading.

Revision D #

by

noting

the

Issued

Set

display

Low

warning

October

readings

during

light

1995

is

on.

7)

8)

9)

10)

11)

12)

13)

14)

15)

Run

for

After

30

Heater
Heater

Turn

the

Turn

the

Turn

on

Check

Run

for

After

30
Heater
Heater

Tum

off

30

minutes

minutes

plate

Wire

humidifier

Check:

cold.

cold

(feel).

Less

temperature

the

mains

power.

temperature

30

minutes

minutes
plate
Wire

the

control

Check:

hot ( Greater

hot

(feel).

humidifier.

without

than

main

power

control

knob

without

than

page

interruption.

60

°C

switch

knob

setting

If

(hP

engineering

off.

to

36.0 + 0.2

during

interruption.

80

°C

).

16

mains

power

is

menu).

°C

and

leave

initialisation.

interrupted

Chamber

test

Control

will

set

have

at 0.

to

be

restarted.

6.2.3

DYNAMIC

1)

Remove
the

2)

Connect

3)

Turn

4)

Turn

Note:

the

breathing

5)

Check

6)

After % hour

7)

Continue

TEST

SEQUENCE

the

34.5

empty

chamber

the

Heater

Set

control

on

mains

At

low

ambient

test

will

warm

circuit

after

10

check

to

run

Airway
In

temperature

‘Engineering

set
offset=

Ede

Cde
hp

and

there

are

(MR730/7

°C

Test

(any

no

Wire

to

36.0+

power

and

temperatures

up

only

will

eventually

minutes

that

chamber

for 3 hours,

36.0 + 0.3°C

Mode’

=

36+0.1°C

0

=>

0

=>

0

=

>36°C

no

spurious

probe

scroll

cable

0.1°C

check

slowly

digital

outlet

then

(see

alarms.

20/700)

and

connect

chamber

and

probe

and

Chamber

settings

(below

and

may

warm

and

display

temperature

check

the

appendix

the

vertically

other

than

assembly

Control

during

initialisation.

22

°C)

the

give a low

the

humidifier

is

36.0 + 0.3°C

is

36.0 + 2.0°C

following:

A2):

supported

an

MR390)

to

the

humidifier.

to

0.

Heater

Wire

temperature

will

start

delivery

on

the

humidifier.

under

the

low

alarm.

If

this

controlling.

tube

flow

is

to

the

conditions

muted

outlet

of

the

of

8)

9)

10)

11)

Rotate
MR720

Rotate

Rotate

Check

temperature

set

to

temperature

the

chamber

Heater

control

40

degrees).

control

Wire

wire

knob

knob

control

to

plug

to

38

and

to

34

and

-2.5

and

check

disconnect

gives

check

check

that

audio

for

for

the

an

Airway

an

Airway

set

low

alarm

Temperature

Temperature

light

comes

and

Heater

on.

Wire

Low

High

alarm

alarm.

alarm.

light.

(For

12)

Push
alarm

13)

Disconnect

alarm.

14)

Push

15)

Unit

the

Heater

light.

the

Mute

is

now

Wire

the

temperature

button

ready

for

switch

and

probe

and

check

service.

check

and

alarm

page

17

that

Heater

check

the

Temperature

silencing.

Wire

off

gives

Probe

Audio

LED

alarm

and

flashes

and

Heater

gives

an

Wire

audio

6.3

6.3.1

6.3.2

PERFORMANCE

The

test

consists

For

the

Static

Initially

second

plate

For
delivery
NOTE:

EQUIPMENT

1)

2)

3)

4)

STATIC

1)

2)

the

heater

part

of

will

be

the

Dynamic

tube

Please

REQUIRED

34.5

°C

Anon

heated

Dual

temperature

An

MR310

TEST

Pluginthe

Turn

the

CHECK

of

two

main

Test

the

humidifier

plate

will

the

Static

Test

at

maximum

Test,

the

assembly

ensure

Test

and a probe

that

probe.

delivery

probe

humidification

PROCEDURE

34.5

degree

temperature

(MR480)

parts:

the

Static

is

first

get

very

hot

checks

the

temperature.

humidifier

with a full

assembly.

the

procedures

circuit

(1.1

to

assembly

such

chamber

(MR480)

test

probe.

contro!

knob

to

Test

run

with

but

should

over

temperature

chamber

The

are

followed

1.3

metre

as

900MR560.

or

similar

33.0 + 0.2

and

the

fixed

inputs

be

cool

delivery

correctly

Adult).

scrolled

degree.

Dynamic

at

protection.

(use

tube

reusable

to

check

the

only

should

to

Test.

end

MR310

avoid

chamber.

for

correct

of

the

first

At

the

end

chambers)

be

supported

misleading

heater

plate

part

of

this

of

this test

is

fitted

vertically.

results.

control.

test.

the

heater

with

The

a

3)

Turn

4)

Check

5)

Check

6)

Push

7)

Run

8)

After 1 hour

9)

Turn

10)

Turn

control

11)

Check

12)

Run

on

the

humidifier

that

33.0 + 0.2

display

Chamber

for 1 hour

check

Set = 33

hp = <70

off

the

humidifier

the

temperature

is

adjusted).

temperature

for 1 hour

flashes

reading

Temp.

button

without

the

control

control

without

main

power

switch.

on

the

display

of

34.5

after

initialisation

and

check

interruption.

engineering

knob

knob

If

menu

to

setting

interruption.

during

for

34.5

mains

power

(Appendix

36.0 + 0.2

during

initialisation.

initialisation.

(+

0.2).

degree

reading

is

interrupted

A2):

degree (check

(+

0.2).

test

will

correct

setting

have

to

is

displayed

be

restarted.

when

the

MR730/720/700/480

Technical

Manual * Revision D Issued

October

1995

13)

After 1 hour

Set = 36
hp = >

14)

Tum

80

off

the

check

the

engineering

humidifier.

menu

page

18

(appendix

A3):

6.3.3

DYNAMIC

Remove

MR310

humidifier.

Note:

extremely

an

1)

2)

3)

4)

TEST

the

or

The

MR480

low

excellent

Turn

on

At

low

test

will

will

eventually

Tum

Temperature

adjustment

Check

After 1 hour

chamber
In

hp
Set = 31.0 + 0.1.°C

PROCEDURE

34.5

°C

Test

similar

humidification

The

chamber

design

gas

flow,

simple

test

the

humidifier.

ambient

warm

after

Engineering

(heater

temperatures

up

warm

one

hour

press

temperature

plate

(MR480)

probe

and

connect

chamber

inlet

should

be

specifications

caused

only

by

of

its

over-all

only

slowly

up

and

Set

control

that

chamber

is

menu

(appendix

temperature) = 60

control

(below

and

start

to

31.0 + 0.1,

digital

display

temp

button

35 - 66

may

controlling.

the

vertically

on

the

humidifier.

unobstructed.

preclude

convection. The

it

from

capability.

22

°C)

the

airway

give a low

check

that

is

31.0 + 1.0.

and check:

°C.

A2)

check:

to

100°C

supported

Connect

controlling

fact

that

it

circuit

temperature

correct

delivery

the

probe

perfectly

does

control,

under

the

alarm.

If

setting

flashes

tube

to

the

assembly

under

these

be

it

low flow

this

is

muted

on

display

outlet

of a full

to

the

conditions

not

perfectly,

conditions

the

circuit

after

of

of

is

the

5)

Continue
spurious

6)

After

7)

Check

8)

Press

9)

Humidifier

to

run

alarms.

three

hours

set=

31 よ 0.1?C

de

=>0

hp

=>

36°C

that

disconnecting

Mute

button

is

for 3 hours,

check

and

check

now

ready

periodically

in

Engineering menu:

the

temperature

the

alarm

is

for

use.

checking

」

probe

gives

silenced.

the

display

an

is

audio

31.0 + 1.0

alarm

and

and

Temp

that

there

Probe

are

LED

no

flashes.

page

19

6.4

6.4.1

6.4.2

DUAL

PROBE

This

test

is

reguired

doubt

as

to

the
temperature
thermometer
probes

have

1.5

°C

would

thermometer

EQUIPMENT

1)

Dual

Temperature

2)

Mercury

3)

Cup

of

warm

4)

Heater

wire

TEST

PROCEDURE

1)

Plug

the

connected.

2)

Turn

on

3)

Insert

both

and

40

°C.

held

together

TEMPERATURE

to

accuracy

readings

for

not

be

any

REQUIRED

filled

dual

the

of

absolute

failed

suspect.

probes

glass

water

if

using

probe

mains

temperature

As

temperature

with a rubber

TEST

be

performed

of

the

temperature

both

probes

verification

in a similar

In

not

probe

manner,

the

second

agreeing

to

be

thermometer.

(Ambient

humidifier

into

to

the

Humidifier,

power.

probes

gradients

band

on

all

temperature

probe.

(chamber

of

within

tested.

40°C).

in

heater

into a container

during

and

temperature

any

probes

case

depending
+ 1.5

wire

if

in

can

be

this

probes

every

three

This

test

allows

the

airway)

if

so

firstly

to

desired.

one

In

exhibiting a temperature

on

the

accuracy

°C

of

the

thermometer

mode.

Heater

Wire

mode

filled

with

water

quite

large

it

is

recommended

test

and

the

water

constantly

months

operator

another,

the

first

to

and

case

or
compare

assuming

difference

of

the

mercury

reading

would

ensure a heater

at a temperature

that

stirred.

if

there

is

the

secondly

that

of

greater

in

the

glass

also

be

wire

assembly

between

the

two

probes

any

to a glass

both

than

suspect.

is

ambient

be

4)

Place

temperatures

5)

Enter
display
displayed

6)

Check

it

should

7)

Ensure

the

thermometer

to

the

Engineering

will

alternate

with

the

temperature

not

exceed

that

the

in

stabilise.

menu

between

ali

decimal

difference

1.5

chamber

the

water

It

is

(refer

points

°C.

and

airway

alongside

recommended

Appendix

the

airway

turned

on).

between

probes

the

that

A2)

and

chamber

chamber

are

probes

the

water

and

select

and

within

and

allow

two

be

constantly

"CP"

(compare

temperatures

airway

1.5°C

probes

of

the

(chamber

mercury

minutes

stirred

probes)

temperature

as

indicated

thermometer

for the

during

option.

by

this

is

the

display,

reading.

test.

The

MR730/720/700/480

Technica!

Manual

#

Revision D #

Issued

October

1995

page

20

7.0

71

7.2

7.2.1

SERVICING

INTRODUCTION

This

section

circuitry
Please

e ' After

e

©

PRINTED

CONTROL

The
fixing
and
front
can
finger
leaving

is

contained

note

Follow

replacing

outlined
After

any

in

Appendix

When

replacing

CIRCUIT

PCB

front

panel

screws

the

two

panel

is

be

moved

pressure

the

push

the

ESD

ribbon

INFORMATION

provides

in

repair

from

now

in

information

on

two

following:

precautions

or

modifying a circuit

sections $ and

involving

B2.

any

BOARD

and

heater

the

rear

cable

positioned

the

appropriate

is

maintained

on

control

for

separate

when

handling

6.
opening

screws,

refer

REMOVAL

plate

assembly

of

the

humidifier

connectors

face

(J1

down

direction

on either

knobs

behind

servicing

circuit

the

boards,

circuit

board,

of

the

humidifier,

to

torque

settings

is

separated

body.

and

J2)

the

three

to

release

edge

of

the

in

the

front

MR730/720/700/480

the

power

board

boards.

go

through

The

disconnected

plastic

the

board,

the

go

through

in

section

from

the

front

panel
from

retaining

board.

when

calibration

humidifier

This
the

panel.

Humidifier.

and

control

the

electrical

7.6

body

assembly

the

rear

latches

protruding

is

facilitated

latches

release,

board.

and

performance

safety

by

removing

can

now

of

the

control

if a slight

the

The

electronic

tests

be

moved

board.

through

upward

board

will

tests

outlined

the

4
aside

If

the

the

board

pop

up

7.2.2

7.3

Power

Separate

the

together.

The

top

should

to

unscrew

REPLACEMENT

For
Series
numbers
French/German

part

PCB

the

Power

power

edge

of

now

the

various

the

any

repair

humidifiers

up

numbers

case

PCB

board

the

be

mains

to

front

from

and

Control

and

heat

board

and

lifted

slightly

wiring

harness

cord

connections

OF

REVISION D POWER

work

which

both

PCB's

92XXAAA05495

models.

to

order

are

the

PCB

sink

assembly

moving

to

clear

connectors

requires

need

To

upgrade

as

follows:

MR480
MR700
MR720
MR730

humidifier

(J1

the

excluding

body

and

72).

can

board

the

lower

which

and

cut

replacement
to

be

upgraded

both

PCB's

043040791
043040792
043040793

043040794

and

disconnect

Cut

the

cable

tie

now

be

removed

forward

the

French/German

slightly

retaining

can

now

cable

&

CONTROL

of a revision D control

together.

and

guides

be

tie

holding

the

software

to

detached.

PCB

models,

the

two

holding

by

flexing

disengage

and

moved

Before

the

mains

ASSEMBLIES

This

affects

and

use a PCB

ribbon

the

heater

the

from

further

cord

or

power

all

up

cable

connectors

plate

and

case

sides

away

the

case.

forward

removing

in

place.

board

Humidifiers

to

93XXAAA01818

service

upgrade

chassis

The

to

the

PCB,

on

with

joining

from

board

gain

the

700

serial

kit,

wires

the

access

on

the

The

kit

For

humidifiers

will

include:

with

Installation

Latest

Latest

Latest
Latest

serial

numbers

Instructions

Revision

Revision

Version
Version

after

Control

Power

Software
Operating

those

Board

Board

mentioned

installed

Manual

above

(Rev

F or

later

PCB's),

you

will

only

be

required

On

completion

replaced.

to

purchase

of a repair

individual

using

boards

the

page

for

upgrade

21

repairs

kit,

future

(as

detailed

repairs

in

need

Section

only

individual

8.9

Electrical

Parts

boards

to

List).

be

7.4

7.5

HEATER

To

reset

the

reset

button

To

replace

1)

Separate

2)

Unclip

3)

Unplug

4)

Unscrew

5)

Unplug
case

assembly

6)

Detach

front.

When

replacing

(check

the

Assembly

FAULT

If

the

This

Determine
the

display,

the
watch
but

LOCATION

neither

the

transformer

may

be

display

turn

processor.

dog

if

port

PLATE

118

°C

over

(through a smail

the

heater

plate:

the

case

front

the

Power

PCB

the

heater

plate

the

earth

screw

the

ribbon

cables

is

now

the

heater

plate

the

heater

heater

plate

spring

the

reverse

is

digital

primary,

checked

if

all

power

is

blank,

on

the

Check

output

PB7

is

of

display

by

depressing

supplies

check

humidifier

for

is

high and

not

changing

temperature

hole

from

from

wires

on

separate

from

plate,

loading).

the

nor

check

the

the

presence

the

cutout,

under

the

humidifier

the

case

from

the

chassis

from

the

from

the

case

ensure

above

procedure.

any

of

that

the

the

are

operational

watch

dog

fault

LED

33 - 40ms

state

there

separate

the

heater

plate

body.

body

(see

the

Power

PCB

for the

heater

Power

PCB

to

the

case

body.

front

by

removing

that

the

three

the

front

panel

mechanical

red

reset

output

indicator

of a 33 - 40ms

clock

is a fault

overheat

button.

and

all

(pin

and

is

elsewhere.

the

case

front

in

the

front

7.2.2(b)

present a fault

above).

(connectors

plate earth

the

Control

springs

LED's

(See

fuses

12,

USg). A high

isolate

period square

PCB

the

three

are

in

are

on

protector

7.4

above.)

are

intact.

the

heater

in

from

the

panel

case

J3

and

J7).

wire.

(connectors

screws

place

on

and

no

power

on

the

If

the

output

circuits

wave

at

the

watch

case

body,

assembly).

JI

which

secure

the

heater

appears

heater

plate has

power

supplies

here

will

but not

PB7

(pin 1 U5b).

dog

circuitry

then

push

and

J2).

The

it

to

the

plate

fixing

to

be

reaching

not

are

blank

the

necessarily

Ifthe

is

indicated

the

cut

OK

front

case

legs

out.

but

stop

7.6

SCREW

Use a torque

TORQUE

Ref

CHASSIS

14
18

21

22

26
27

HEATER

2

5

driver

Screw

Screw
Screw

Screw

Screw

Screw

PLATE

Screw
Screw

SETTINGS

with

the

#8 x 4"
M4 x 8
M6 x 25

M4 x 14

M6 x 16
M3 x 5

M4 x 8
M3 x 5

Pan

Pan

Pan
Pan

correct

Screw

Pan

Phil

Phil

Csk

Allen

Pan

Pozi

Allen

Phil

Phil
Phil

bit

attached

TY25

Taptite

S/S

Taptite

S/S

Button

Taptite

Taptite
Taptite

and

tighten

S/S

Head | Chassis

Case
Chassis
Mounting

Mains

Heater

Heater

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MR730/720/700/480

Technical

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#

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Issued

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1995

page

22

8.0

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Part

Lists

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COMPONENTS:

C10,

C11

LIST

listed

below

diagrams

PCB

Assemblies

of

Revision D PCB's

(REVISION H PCB)

Description

Control

Control
Control

Control

Eprom
Eprom

Eprom

Eprom

Cap.
Cap.

Cap.

Cap.

Cap.

Cap.

Cap.
Cap.

PCB

PCB
PCB

PCB

Programmed
Programmed

Programmed

Programmed

Ceramic

Mylar

Ceramic

Elec.

Ceramic
Ceramic

Mylar

Ceramic

are

referenced

(Section

Assembly

Assembly
Assembly

Assembly

100nF

100nF

22pF

104F

25V..

InF

22nF

10nF

50V

470pF

8.6).

listed

refer

MR480
MR700

MR720

MR730

50V..

50V

50V.

50V

50V.

....

50V..

in

below

to

Section

MR480

MR700
MR720

MR730

Ver

Ver

Ver

..

accordance

are

replacement

7.3 for

(No

Eprom).....

(No

Eprom)..

(No

Eprom).

(No

Eprom).

Ver

3.0..

3.0

3.0

3.0..

with

the

details

component

parts

for

Revision F &

of

upgrade

..
..043040633
..043040677
..043040675

..
..

.
„362040079

„312040116

„316040084
„312040118

layout

kits.

Part

No.

043040679

362040076
362040077
362040078

H

D1, D2, D3,
D4, D5, D6,
D9,

D10,
DSP1, DSP2,
ЛА,

РА

LEDI,

LED2,
LEDA,

LED6, LED7,
LED8, LED9,

91,

02,03,

RI, R2, R3,
R14, R26, R28,
R36,

D7,

D11,

D12

DSP3

LED3

LEDS,

LED11

LED10

04,013

R5,

R6,

R31,

R39, R41,

R43
R4
R7,

R13
R$
RIO,

R33, R65,

R70
RI
RI2

RIS

D8,

Diode

1N4148

5%

eee

.

Display

14

LBD

LEDamberyellow.........................

РГЕР

Transistor

Resistor

Resistor

Resistor
Resistor
Resistor
Resistor

Resistor
Resistor

LED

(HDSP5301

pin

ribbon

connector

gee

тей..............

ели

BC547B.......................

10k

0.25W

5%

DIL

Resistor

4k7

0.25W

5%.

27k

0.25W

5%.

22K

0.25W

180E

0.25W

6k8

0.25W

5%

9k09

0.25W

pack

5%.

5%..

1%

or

LA6760)...

socket

7/27k

Metal

Film...

a n ore

..999860001

rnner

onen

nan

«325040284

..

..

.
„325040318
..325040309

-
..

361040155

341040357

361040329

361040328

361040327

361040159

325046010

325040287
325040319

325040335
325040145

MR730/720/700/480

Technical

Manual # Revision D #

Issued

October

1995

page

40

Ref.

RI6
Ri7
R18
R19,

R24,
R20
R21,
R22, R23,
R25,

R35,
R30
R32,

R63
R34
R37,

R38
R42

SW2,

SW3,
SWS
SPK1

U2
U3
U4

Us
U6,

U8
07
us
U10

R69

R27,
R40

SW4

R29

Description

Resistor

Resistor
Resistor

Resistor
Resistor

Resistor
Resistor
Resistor

Resistor

Resistor

Resistor

Resistor

Push

Heater

Audio

IC

IC

IC
or

IC

560E

1k5

4k7

2K2
412E

820E

100k

220E

15K

180k

22E
2K7

switch.

Wire

Transducer

Octal

Latch

Micro-Processor

Ram

VO

Timer

IC

Ram

VO

Hex

inverter

IC 8 Channel
IC

Display

IC

3x2

IC

Quad

Driver

Channel

Operation Amplifier

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

switch

CB-12KP

74LS373

8156

Timer

74HC14

Mux.

CD4051B

MM5451N....

Mux.

0.5%

0.5%

Metal

0.5%

Metal

5%

0.5%

0.5%
1%

Metal

1%

Metal

5%

1%

Metal

1%

Metal

5%

“ῥ“Ὁϱ----.

8085

....

81C55.

CD4053B.

Metal

Film..
Film

Metal

Metal

Film....

Film

Film....

Film

TL074

Film

Film

Film

.

onen

eee

erram

Part

No.

325040135

„325040137
„325040138

.

325040282
325040152

325040136

«+

325040139

„325040134

«+

325040317

.

325040125

-

„325040133

...

999012720

++.

349040094

....

349040099

426040015

999610004

....

999630012

.

999630003

....

363040415

1363040232

363040125

..-

363040126

....999610003

..

363040124

8.9.2

VRI
VR2,

VR3

VR4

VRS

XTALI

POWER

Ref.

C6,
C7,
C25,

C8,

C33

C27

BOARD

C32

C26
C28,

C29

C30,

C31

D13,

D14,

D15,

D16,

D17,

D19, D20,

D21

10K

5K

10K

50К.

Crystal

Spacer

COMPONENTS:

Description

Power
Power

Cap.

Cap.
Cap.
Cap.

Cap.

Cap.

Di8

Diode
Diode

Preset

Potentiometer

Preset

Ргезет............

6.14

Heater

.

Multiturn

iii

МН?.........

Wire

Switch

(REVISION H PCB)

PCB

Assembly

PCB

Assembly

MKT.

100nF

Poly

100nF

Elec.

470uF

Elec.

2200uF

Elec.

10uF

Ceramic

22nF

MR480
MR700/720/730

100V

250V....

25V

25V

25V

50V...........

1N4002...

1N4148....

еее

ee

.

Complete

Complete

утилите

.

...

327041591
327041562

...

327041565

327041590

999820001

693040522

Part

No.

....

043040678

.

043040637

.…

311040028

..-

316040073

-..

999234710

„311040695

....

311040663

nes

312040116

+.»

361040163

...361040155

Fl
F2

F3,

F4

(MR700/720/730)

Fuse
Fuse
Fuse

fast

acting 1 Amp

fast

acting 4 Amp

fast

acting 2 Amp

(20 x 5mm)...
(20 x 5mm)..
(20 x 5mm)

for

230V

+

999830001

„999830017

-

999830009

page

41

Ref.

F3,

F4

F3,

F4

F3,

F4

Q6,
Q5

Q7
08
09,

Ul,
U13

R9
R44,
R54,
R45,
R47
R49
R51,
R53,
R56
R57
R64
R67
R68

910,

011

U12

R46, R48,
R58,
R55,

R52
R59

(MR700/720/730)
(MR480)
(MR480)

912

R50,

R60,

R66

R61

Description

Fuse

fast

acting 3 Amp

Fuse

fast

acting

Fuse

fast

acting 2 Amp

Transistor

Transistor
IC 5 Volt
IC 5 Volt
Triac

IC

Optocoupler

IC

Optocoupler

Resistor

Resistor

Resistor

Resistor
Resistor

Resistor

Resistor
Resistor 12k

Resistor

Resistor
Resistor
Resistor

BC547B.

BC557B.
Regulator
negative

BTA

08-600

18E

10k

2k7

22k

120E

3k3

270E

180E

220E

1M
100k0.25W

1.5

MOC3021

CNY

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

0.25W

Part

(20 x 5mm)

Amp

(20 x 5mm)

(20

5mm)

for

115V......................

for

230V

...

for

115V

999830012

.-

999830008

.-

999830009

7805..

Regulator

17-2

5%...

79L05

or

MOC3022

..

5%...
5%..

5%..

5%..

5%.....

5%..

5%.....

5%...

5%

5%..

5940.................................

-

999600003

.-

363040146

-

999550011

..

367060001

-

363040045

325040366

+

325040284

--

999012720

+

325040318

325040289

325040309

325040296

325052305
325040139

No.

8.10

8.10.1

MECHANICAL

The

mechanical

diagrams

MR480

Ref.

1

2

3
4
5

6
7
8
9

10

1
12

13

PARTS

components

(Section

MECHANICAL

Description

Heater
Heater
Heater

Clamp
Clamp

Clamp
Clamp
Spring
Guard
Gasket

PCB

Assembly

Case

Front

Knob

Control

Case

Door
Switch
PCB

Assembly
Case

Foot..........

Case

Door

fuse

LIST

5.10).

PARTS

plate

Assembly

plate

Assembly

plate

Assembly

Chamber
Chamber

Chamber
Chamber
Mounting

Chamber

Clamp

Kit - Specify

Right

Harness

Left..

CÍEPS

listed

below

150W
150W
150W

Kit

Blank

Kit

French

Kit

German

Kit

English

Kit..

MR480

Assembly

MR480

coocccnacocacaninonccnanraracrcoroncon

are

referenced

100V
115V.

230V

.

(includes

(includes

(includes

(includes

Control

Model

лилии

инимиинивизивовиитиитиитиититизиниитнититииииниивнинитииининие

..

Power

Gasket

Gasket

Gasket

Gasket

No

Epro

Number

Complete

encon coros

in

accordance

Ref.

Ref.

Ref.

Ref.

eg

"Case

5)..

5)...

5).

5)

Front

rorincrn

cnn

with

Kit

MR480JHB"

nenar

recaen

rn

the

appropriate

ee

999840001

exploded

Part

No.

043040701

..

..

..

043040831

..

043040834

.-

662040040

..

043040709

..

336060126

043040679

281130393

.-

693040473

-

043040697

MR730/720/700/480

Technical

Manual # Revision D #

Issued

October

1995

page

42

Ref.

14

15
16
17
18

19

20
21
22
23

24
25

26
27

28

29

30

31

Description

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Screw

#8 x 1/2"

Case

Body

Kit - Specify

Washer

Nut

Bracket

Screw
Bracket
Screw

M6

M6

Nyloc

Transformer

M4 x 8

Mounting

M6 x 25

Transformer

Transformer

Screw

M4 x 14

Clamp

Cord

Clamp

Cord

Spacer

Hose

Washer

Screw

Lug

Probe

Screw
Washer

M6

M6 x 16

Earth...

iii

Socket

M3

x 5

Lock

MR700

MR700
MR700
MR700
MR700

MR700

MR700
MR700
MR700

USA

Australian
No
French
Danish

USA

UK

Schuko
Schuko

Pan

Wavey

ZPS.

Pan

Phil

30mm x Smm

Csk

Allen

Assembly

Assembly

Pan

Phil

Small

..
..

Heater

Fan

Allen

Harness

Cord..

Disk

Large

Ext

Taptite

M4

Int

Hosp

Grade

Clear Plug 3.3m..

Plug

3.3m

230V

Plug

Hosp

Grade 2 ft

Plug

230V
Plug
Plug

Phil

TY25

S/S

Model

Number

ZP

Taptite.

S/S............

MR480

MR480

S/S

Assembly

Pan

230V

115V

Taptite

Lock

Button

Phil

YChr.

YChr

Zn/St.

.

Zn/P1

3.3m

UL...

No

Plug

3.3m.

230V

2.9m.......

Fused

230V

3.3m......

230V

3.3m

eg

90deg

3.3m..

Earth

"Case

Plug

Tongue.

Head..

Lug

Body

UL

Kit

MR480JHB"

eres

nn

Part

++

095428157

095428159

...

095428160

+

095428203
095428204

...

095428205

...

095428214

095428217

...

095428226
614040120

nema

622040140

..

621040524

641040706

...

614040117

.-

693040491
614040208

...

043040551

...

043040850

614040223
693040476
693040477
336060064
622041013

614040230

345060096

043040698

614040116

...

622040130

No.

8.10.2

MR730/720/700

Ref.

1

Description

Heater

Heater

Heater
Heater

2

Clamp
Clamp

Clamp

Clamp

3
4

5
6

7

8

9

Spring
Guard
Gasket
PCB

PCB
PCB

Case
Knob

Knob

Knob

10

u

12

13
14

Case

Switch

PCB

Case

Harness

MECHANICAL

plate

Assembly

plate

Assembly

plate

Assembly

plate

Assembly

Chamber
Chamber

Chamber

Chamber

Mounting...

Chamber

Kit

Blank ( includes

Kit

French

Kit

German

Kit

English

Kit.

Clamp..….......

Assembly

Assembly
Assembly

Front

Kit

Specify

MR700

MR720
MR730

Control

...........

Offset

Fixed

Offset.

Door

Right

....

Harness

Assembly

Foot...

Assembly

(MR730/720/700)

Assembly

DB9

PARTS

150W

100V

150W

115V

150W

127V

150W

230V

(includes

(includes

(includes

ss

Controi

Control
Control

Model

Number

...

rire

(RS232)....

nn

...

...

No

Eprom

No

Eprom

No

Eprom...

Power

Gasket

Gasket

Gasket

Gasket

einen

eg

"Case

Complete

Ref.

Ref.

Ref.

Ref.

Front

;

5)..

5).

5)

5)

Kit

MR720JHB

Part

No.

043040701

«.

043040700

043040839
043040695

043040829
043040830

043040831
043040834

662040040
043040709
336060126
043040633

043040677

....

043040675

...

281150393

693040475

693040483
693040473

043040697

043040637

693040478
043040699

page

43

Ref.

15
16

16

17
18

19
20
21
22
23
24
25
26
27
28

29
30
31

32
33
34

35
36
37
38

Description

¡CA
Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Mains

Cord

Screw

#8 x 1/2"

Case

Body

Washer

Nut

Bracket

Screw

Screw

Nut

Bracket

Serew

Insulator
Transformer
Transformer
Transformer

M6

M6

Nyloc

Transformer

M4

x 8

M4 x 50

M4

Nyloc

Mounting

M6 x 25

Transformer

Transformer
Tape

Foam

Screw

M4 x 14

Clamp

Cord

Clamp

Cord

Spacer

Hose

Washer

Screw

Screw

Washer
Harness
Probe

M6

M6 x 16

M3

x 5

Lock

J10-Hose & Socket

Socket

MR700

MR700

MR700
MR700

MR700
MR700

MR700
MR700

Pan

Kit

Specify

Wavey

...

ZPS...

Pan

Phil

Pan

ZPS

30mm x Smm

Csk

Assembly
Assembly
Assembly

Assembly

Adhesive

Pan

Small

....

Large

....

Heater

Ext

Fan

Allen

Taptite

M4

Int

Harness

USA

Hosp

Grade

3.3m

Australian

No
French

Danish
UK

Schuko
Schuko

Phil

Model

ZP

Phil

Plug

230V

Plug

Plug

Plug
Plug

TY25

Taptite

ZP

Clear

3.3m
No

230V

230V

230V
230V

S/S

Number

Plug

Plug

2.9m..

Fused

3.3m

eg

.

Tongue

Allen

S/S

(MR700
(MR700
(MR700

(MR700

Series)

Series)

Series)

Series)

230V

3mm x 10mm x 60mm

Phil

Taptite

Cord.

Disk

S/S

Pan

Zn/PI

Assembly

Lock

Button

Phil

Heater

YChr..

Zn/St

Head.

YChr

Wire

UL.

3.3m.

3.3m

3.3m.

3.3m

"Case

100V.
115V
127V

Kit

Earth

Body

(double

Lug

Kit

MR730JHB"

insulated)

Part

No.

A

693040472

.095428157

.

095428159

.

095428160

.

095428203

„095428204

...

095428214

.

++

095428217

.

095428226

....

614040120

«+

622040140

«e.

621040524

..»

641040706

.614040117

....

614040214

...

621040517

.693040491
… 614040208
…331040158

.043040929

…

043040928

…

043040931

.043040932

++

294040059

----

614040223

.

693040476

++.

693040477

....336060064

.622041013
…

614040230

-345060096

.614040116

.622040130
…

043040961

…

043040698

8.10.3

HEATER

Ref.

BEM

PLATE

ASSEMBLY

Description

Insulator
Screw
Cover

Element

Element

Element

Element
Screw

Insulator

Thermistor

PlateHeater....................................

Harness

Washer

Thermostat
Harness

MR730/720/700/480

PARTS

Heater

M4 x 8

Element

Pan

РЁ

Assembly

Assembly

Assembly

Assembly

M3 x 5

Taptite

Element....................

and

Harness

Heater

Plate - Earth...

Lock

M4

118

J7 - Heater

Technical

(MR730/720/700/480)

Plate

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

Phil

Taptite

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

230V

127V

115V

100V

Pan

Int

Zn/PL.....

Degree

Plate....

150W.

150W.

150W.

150W.

Phil

YChr

Assembly.

Centigrade

Manual # Revision D #

00000”

Issued

Part

„331040154

.

614040117

„641040707

.

043040893

...

043040833

+++

043040894

.043040895

....614040116

....331040114

.095428156

....

043040875

....095428154

.622040130

.349040052

095428279

October

No.

1995

page

44

page

8.11

ExPLoDeD

DIAGRAMS:

MR480

45

page

46

page

8.11

Εχριουευ

DiAGRAms:

MR730/720/700

47

page

48

8.12

ExPLoDED

DIAGRAMS:

HEATER

PLATE

page

ASSEMBLY

49

MR730/720/700/480

(InvertED

View)

© ©

OO

OVO

page

50

8.13

PCB

IDENTIFICATION

DIAGRAM

page

51

FRONT

347

CIRCUIT

O40

B28

BOARD

CTRL

SPARE
MRYSO
MRIOO
MRI20

mR730

PART

043

043
043

043040

NO.

OO]

040

040

679
633

677

675

REAR

347

CIRCUIT

040

328

BOARD

PWR

SPARE

MRYBO

MRTOO

PART

043

043

No.

040

040

678

637

page

52

8.14

HEATER
WIRE

bk

PROBE

bt-1

|

bra

ON/OFF

Power

bk

or

ver

SWITCH

一

PCB

or

ы\

一

Harness

=
=

σιο

page

Connection

37

76

72

1008

rd

8

75

am

~

i

DIAGRAM

REAR,

347

SPARE

mr

MRTOO

cd

53

CIRCUIT

040

480

À

PART

043

O4B

328

73

74

BOARD

PWR

NO.

040

040

7:9

79

0

678

657

MI

Y

Y

Tıs

-

w

24

TRANSFORMER.

.

POWER,

CORD

page

54

MR730/720/700/480

Technical

Manual

+

Revision D #

issued

October

1995

page

55

9.0

PRODUCT

This

change

changes.

DATE | CHANGE | FIRST

29/06/92

03/08/92

22/01/93

25/01/93

7/06/94

12/10/94

22/08/94

15/12/94

17/02/95

3/07/95
9/08/95

1/10/95

CHANGE

history

Refer

NUMBER

details

also

1056

1019

1363

1100
1992

2088

2079
2161

2313
2469
2433

2443

to

change

HISTORY

changes

92XXAAA02786 | Introduction

92XXAAA05495

93XXAAA01818 | Introduction

93XXAAA02582 | C7
9473JES08020 | Version

(1)

9473AGU17549

9473AGM14257 | MR730AGM
9473GES22496

9573GEU03084
9541JHB10757
9573JHB12155 | |

9573AEA15923 _ |

which

panel

on

SERIAL

NUMBER

AFFECTED

may

have

circuit

diagrams,

«

Changes

-

Delay

-

Sensitivity

«

Auto

(Note:
until
models.)

|

Enhanced

PCB.
Note:

until

models.
Note:

Changes

-

Standby

+

Low

+

Set

«

Display

|

AGU

|MR730GES

|

MR730GEU

_|

Electroless
Changed

Introduction

significance

and

of

from

on

chamber

of

standby

this

change

serial

number

41

°C

this

change

serial

number

of

this

change

added,

R57

3.0

software

from

mode

temperature

sooner.

low

indicator

during A to D calibration

AND

AGT

to

to

to

nickel

recommended

of

for

servicing.

Appendices

Version
Version

temperature

control

mode

not

93XXAAA01818,

calibration - with

not

93XXA

Version

not

changed

version

times

alarm

alarm

Models

version 3 software

version 3 software

version 3 software

plating

Rev H PCB

at

back

COMMENTS

2.0

Software.

1.0

are:

knobs

increased.

for

MR720.

introduced

introduced

A

2.0

Software

introduced

to

390E

started.

2.0

are:

out

after

30

in

warm

changed

to

version 3 software

on

heater

settings

display.

A01818.)

on

It

does

not

of

this

manual.

on

AF-

and

excluding

introduction

on

AF-

and

on

AF-

on

AGM

models.

from

1K2.

minutes

up

(was

mode

activated

improved

plate

started.

front

fascia.

include

AG-

models

AGM

of

Rev

AG-

models

and

AG-

20)

all

F

9.1

Notes:

(1)

COMPATIBILITY

Care
the
then

7.3 for

All

countries

has

been

taken

two

PCB's

are

both

PCB's

need

details

of

upgrade

MR730/720/700/480

except

OF

SOFTWARE

to

kept

to

Japan

and

AND

e

ensure

that

the

software

together

be

as a set.

upgraded

kits.

Technical

together

Revision F and H PCB's

Manual # Revision D 3

Germany

HARDWARE

is

downwards

So,

if a revision D power

to

Revision H to

VERSIONS

compatible

ensure

can

be

replaced

with

the

or

control

Issued

PCB

correct

performance.

individually.

October

hardware,

needs

to

1995

as

long

be

replaced,

See

section

as

page

56

9.2

9.3

MODEL

eg

First

SERIAL

NUMBER

for

MR730AEU:

Letter

A

P

J

G

NUMBER

EXPLANATION

MR730
Model

Voltage

230V z 25V

127V x 10V
115V

100V + 10V

EXPLANATION

A

Type

Voltage

Second

Letter

D

E
F

G
H

I

L

S

Front

Language

English

English

French

German

English

Japanese

Italian

Spanish

E
Language

Panel

U
Customer

Specific

Side

Panels

Language

English/German

English/French
English/French

English/German
English/Spanish

English/Japanese

English/Italian

English/Spanish

92

YEAR

XX

MODEL

41

MR410

48

MR480

70

MR700

72

MR720

73

MR730

AAA

CODE
Three-letter
is

as

specification.

per

code

above

XXXXX

SERIAL

NUMBER

MR730/720/700/480

Technical

Manual

#

Revision D #

Issued

October

1995

page

57

APPENDIX

A1

CALIBRATION

Entry
Mains

After a two

On

(730/720/700

The

On

one

released

The

button

A

to

the

calibration

Power

switch.

second

releasing

'Chamber

pushing

second

calibration

-1-

-2-

-3-

-4-

„5

then

push.

the

the

delay

that

The

MODE

delay

'Chamber

or

480).

Temp'

"Chamber

step

function

mode

normal

mode

is

the

display

Temp'

button

is

now

Model
Software

Traceability

41.0

°C

ADC

Temp'

to

the

next

is

entered

will

time

out

exit

mode

made

by

holding

should

button

the

used

number

version

number.

comparator

zero

calibrate.

button

the

higher

function

(to

normal

is

to

turn

down

show

display

to

step

between

display.

display.

calibrate.

VR5

display

number,

operating

the

humidifier

the

"Chamber

'-1-.

will

show

functions

VR4

will

show

where

mode) 5 minutes

the

the

if

mains

Terap"

humidifier

as

shown

present

the

"Chamber

power

function

after

switch

button

model

below.

Temp"

the

off

and turning

number

number

last

button

‘Chamber

then

on

then

again.

on

the

after

is

then

Temp'

a

A2

A2.1

For

details on

ENGINEERING

To

enter

the

at

least

1.5

seconds.

that

function

control

kept

The

"Chamber

button

2)

mute
humidifier

temperature

depressed.

display

1)

If

the

Mute

is

then

Releasing

button

If'End'
and

ENGINEERING

appears

the

stepping

Temp'

will

41.0°C

and

MENU

engineering

At

this

and

on

release

setting

If

the

Mute

can

be

stepped

is

held

down

until

the

released

the

is

pressed

DISPLAY

the

mute

button

whereupon

display

on

the

through

"End".

display

FUNCTIONS:

ADC

zero

menu

push

time

of

the

to

one

is

released,

through

constantly

display

display

the

and

the

function

calibration

the

Mute

the

display

‘Chamber

decimal

place.

the

the

engineering

the

functions

changes

will

humidifier

the

show

display

the

Mute

pointers

HEATER

to

procedures

and

‘Chamber

will

show

Temp"

button

To

display

will

the

next

that

function.

will

automatically

will

show

button

is

continued.

WIRE

refer

Temp!

SET

(for

the

maintain

revert

menu

in

two ways.

can

be

selected

function

that

function

momentarily

MODE

section

buttons

set

temperature

display

to

this

norma!

will

display,

sequentially

pointer,

step

where

through

or

pushed

5.3

simultaneously

display)

show

the

set

the

Mute

button

operation

if 6 seconds

the

if

the

time

in

about 6 seconds.

by

pressing

the

‘Chamber

menu

until

has

out

and

hold

as a pointer

temperature

should

be

the

Temp'

either

the

elapsed

will

and

be

inhibited

for

to

the

SET

OFF

Ede

Cdc

hP

L
CP

Ei

Ti

MR730/720/700/480

Set

temperature

Offset

temperature

Heater

wire

duty

Heater

plate

Heater

plate

temperature
Programming
Compare
Heater

Heater

Technical

probes

wire

plate

integral

Manual

display

display

cycle

duty

cycle

link

status.

(Probe

integral

(°C)

(Chamber

(%)

(%)

(°C)

(Ll,

L2,

test)

#

Revision D #

Control)

...

L6)

(°C)

Issued

October

1995

page

58

A2.2

A2.3

A3

ENGINEERING

SET
de

bP

L

CP

i

INTEGRAL

The
difference
in

hexadecimal

before

being

PROGRAMMING

The

DISPLAY

integral

between

cycling

lit.

The

following

x = don't

1 = link.

0

=no

FUNCTIONS:

is

an

error

the

notation,

back

magnitude

CONTROL

options

care.

link.

NON

Set

temperature

Heater

Heater

Programming

Compare

Heater

offset

signal

set

control

ie.

the

count

to

0. A negative

of

the

OPTIONS

can

be

enabled

HEATER

plate

duty

plate

temperature

link

probes

plate

Integral

which

and

probe.

progresses

integral

integral

by

WIRE

MODE

display

cycle

(°C)

(%)

(°C)

status

(Probe

test)

constantly

It

is

displayed

from 0 to 9 then

is

indicated

is + or - EFF

joining

the

pads

accrues

in

by

the

(+

or - 3839

on

the

to

compensate

the

'Ei'

continues

three

‘decimal

in

control

for

and

'Ti'

through

decimal

PCB

as

the

temperature

engineering

Abcd

points’

in

the

notation).

shown.

functions

EF

display

A4

A5

Li

12 13

x

x

x x

1

0

1

1

0

1

0

0

The

state

of

The

factory default

80

°C

heater

GLOSSARY

EOH
OFFSET
SET

TOP
RSD

ERROR

During
window

CODES

operation,

an

termination

the

count

than

256

an

indicated.

0

1
x
x

x
x

the

above

plate.

OF

ABBREVIATIONS

The
The
The

The
Remote

if

error

condition

of

the

integration

exceeding

underflow

|

ISO

draft

standard
Gliding
50

80

90

110

settings

End
temperature
temperature

temperature

the

certain

tone

°C

maximum

°C

maximum

°C

maximum

°C

maximum

links

can

are

for

Of

Hose

Shut

Down.

microprocessor

will

be

ramp

limits

error

is

generated

audio

audio

alarm.
temperature
temperature

temperature

temperature

be

displayed

the

ISO

temperature.

difference

Set

potentiometer.

at

the

Top

U3

flagged.

from

U10-E

generate

and

alarm.

Heater
Heater

Heater

in

the

engineering

alarm

and

of

the

TOP

of

the

humidification

does

not

In

particular

and

an

error

should

Plate.
Plate.

Plate.

Heater

Plate.

110

°C

from

Sets

the

receive

the

also

controls

message.

the

count

menu

(‘L’).

heater

plate,

the

SET.

controlling

chamber.

an

expected

RST6.5

the

When

exceed

interrupt

counter

the

16128

except

MR720

temperature

interrupt

within a given

which

in

U4

will

count

recorded

an

overflow

which

of

the

marks

in

by

error

EOH.

the

the

UA

has

time

event

is

less

is

an

of

MR730/720/700/480

Technical

Manual

*

Revision D %*

-Issued

October

1995

Some

of

the

below,

with

Error

Messages
Ec
En

EXx

b-1

b-2
F2

ーー

The

following

persist

they

during

the

test

Errors

EP2
thermistors

error

indications

an

explanation

Checksum
Memory

test

Where X = 0 through

Where x = 0 or
indicated

The

Mute

The

Standby

The

Heater

Temperature

errors

may

occur

do

not

necessarily

that a definite

to

EP4

can

be

caused

or

by

rapidly

changing

which

can

of

the

possible

error

(possible

error

(possible

7,

u,

indicating

multiplexer

button

button

Wire

sensor

indicate a faulty

is

on

is

fuse,

probe

during

stage.

the

conclusion

for

example

input

page

59

be

displayed

on

cause.

failure

of

U1

failure

of

indicating

at

turn

on

(see

F2

is

fault

ADC

on

b-1

open

(see

or

overflow

above)

circuited.

multiplexer

has

sec.1.6.2).

software-driven

probe

assembly.

cannot

immediately

by

abnormal

temperatures.

the

MR700

EPROM).

U4

RAM).

been

shorted

be

high

Series

stage

where

error

or

underflow

on

for > 5

minutes.

probe

It

is

because

made.

differential

digital

display

error

occurred.

error,

cable

test.

If

of

conflicting

temperatures

are

listed

at

the

the

errors do not

results

on

the

two

A6

A6.1

EPI

EP2
EP3

EP4

MR700

SERIAL

1

byte

4

bytes

4

bytes

4

bytes

4

bytes

4

bytes

4bytes

4

bytes

4

bytes

2

bytes

Between
The

complete

Data

format

SERIES

DATA

ASCII
ASCII
ASCII
ASCII
ASCII
ASCII

ASCII

*

each

is

Hardware

Low

probe

High

probe

Partial short

HUMIDIFIER

FORMAT

:

(semi

Temperature
Airway
Chamber
Heater
Heater
Heater

Chamber

Status

CR,

LF.

of

the

above

data

record

RS232

levels,

fault;

Q13

temperature

temperature

between

SERIAL

colon)

Marks

control

temperature.

temperature.

Plate

temperature.
wire duty
plate

Control

information.

(Marks

is

cycle.

duty

cycle.

setting

end

lines

there

repeated

no

handshaking,

short

not

effective.

(~0

°C).

(~70

°C).

the

active

probe

DATA

INTERFACE

beginning

setting

of

data

.

(1*

ASCII

of

is

every

3*binary

data

record)

approximately a 50

500 - 600

9600

baud, 8 bits,

cable

record.

bytes)

ms

(500ms

conductors.

ms

pause

before

on a 60Hz

no

parity,

the

next

supply,

with

one

line

600ms

stop

bit.

is

transmitted.

with

50Hz).

Between

In

The

LD. a -
LD. b -
LD. c -

Range

LD. d -

the

each

case

format

of

SET
Airway
Chamber

05.0 - 80.0°C.

Heater

semi

the

first

the 3 bytes

temperature.

temperature.

temperature.

Plate

MR730/720/700/480

colon

and

byte

of

following

decimal

temperature.

Technical

the

the

point

line

feed

there

are

eight,

packet

contains

the

ASCII

is

assumed

an

identification

I.D.

is

between

Manual # Revision D %

4-byte

as

shown

1st

packets

below.

and

2nd

letter

from

digits.

Issued

of

information

'a'

through

October

as

shown

'h'

1995

in

ASCII.

above.

Range

14.0 - 99.9°C

decimal

point

page

assumed.

60

100 - 135°C

no

decimal

point.

A6.2

LD. e -
LD.

f-

Heater

Heater

Range 0 -

LD. g -

Range

LD. h -

The

See

The

conditions
can
and

When
error

STATUS

First

Bit)

Bitl

Bit2

Chamber

-5.0

Status

ASCH

format

data

be

missing.

will

there

condition.

Byte

Bit3

Bit4

BitS
Bit6
Bit7

Wire

Plate

100

%

Control

to

+2.0

information.

ID.

is

followed

below.

record

as

however

The

show

the

error

are

error

INFORMATION

Probe

disconnect

Heater

Wire

Airway

Airway

Chamber

Chamber
Chamber
Always

Temp

Temp

Temp

Temp
Temp

set

duty

cycle.

duty

cycle.

Setting.

decimal

point

by

received

(when

should

there

status

information

condition.

messages

LED

disconnect

Low

High

Low

High
Button

high

three

in

LED

LED

LED

LED

assumed.

binary

start

are

'E'

the

display

LED

LED

Plus

bytes

with

an

messages

packet

'h'

bit 6 of

or

minus

giving

'"and

in

the

wili

the

sign

alarms

end

with

display)

always

last

status

in

and

an

some

be

present

leading

ASCII

error

information.

'LF’.

Under abnormal

or

all

(as

byte

will

of

the

long

be

set

byte.

operating

above

packets

as

the

micro

high

indicating a fatal

'a'

to

is

running)

'g'

Second

Bit0

Bitl

Bit2 © Remote

Bit3

Bit4
Bit5
Bit6

Bit?

Third
Bit0

Bitl

Bit2

Bit3

Bit4 | See
Bit5

Bit6

Bit7

Byte

Standby

Oo

Heater

Set

Audio
External
External

Always

Byte

Heater
Heater

Always

Always

See

Fatal
Always

Low

table

table

button

Wire

Shut

LED

alarm

request
request

set

Plate
Wire

low

low

error

set

LED

operation

Down

request

muted

acknowledge
acknowledge

high

ON
ON

high

LED

acknowledge

Heater
No

Heater

Wire

operation

Wire

Bit4

0

1

0

1 1

operation

Bit5

0
0

1

Model

MR480
MR700

MR720
MR730

page

61

A6.3

A6.4

A7

REMOTE

A
circuit

i.e.

removal

standby

SERIAL

A

pin2

pin3

pin5
pin7

REVISION F & H PCB

Components

an

STANDBY

constant

high

input

No

low

of

LED

DATA

DB9

connector

Remote

Serial

Humidifier

+5

optional

input

enables

alarms

an

RSD

is

also

INTERFACE

on

shut

Data

volt

30

marked

feature

the

active,

request

turned

the

down

output.

Earth.

mA

with

and

(pin 2 DB9

humidifier.

controlled

the

humidifier

on

(not

CONNECTOR

side

of

the

input

max)

SCHEMATIC

an * on

may

not

be

connector > 1.5

An

RSD

40.0

°C

enters

flashing).

humidifier

(Serial

in).

DIAGRAMS

the

Revision F & H Schematic

included

volts)
request
heater

the

provides

in

units

signal
plate
warm

containing a Revision F or H PCB.

shuts

down

puts

and

up

mode.

the

interface

the

the

humidifier

15%

Heater

On

connections.

Diagrams

humidifier.

Wire

the

MR730/720

(ie

Low

into

the

duty

LED12,

or

standby

cycle.

models

R62)

open

mode;

On

the

provide

MR730/720/700/480

Technical

Manual

#

RevisionD

#

issued

October

1995

page

62

APPENDIX

Bi

RECOMMENDED

The
of
mode.

intervals.

The

For

B1.1

Perform

a)

b)

c)

B

MR700

the

humidifier

For

following

each

maintenance

Monthly.

the

Check

electrical

Remove

necessary.

Check

of

the

plugs

MAINTENANCE

series

humidifiers

reporting

this

reason

list

of

routine

check

following:

temperature

contacts.

and

check

heater

wire

with

their

SCHEDULE

operating

any

errors

preventative

probe

Clean

the

reusable

connector

respective

maintenance

checks

are

fill

out a checklist,

for

damage

with

alcoho!

hose

for

software

and

in

the

recommended

as

to

sensor

on a swab

heater

damage

sockets

to

on

continually

event

of a fatal

of

the

humidifier

to

be

given

in

tips,

abrasion

or

replace

wire

(if

fitted)

cable

and

both

the

heater

monitors

error

need

performed

section

B2.

of

the

as

necessary.

for

kinks

end

plugs.

base

and

heater

the

performance

terminates

only

at

the

cable

and

operation

be

performed

intervals

or

tarnishing

abrasions.

Check

wire

assembly.

characteristics

in a fail
at

extended

stated.

of

Replace

for

correct

coupling

safe

if

d)

Check

humidifier

e)

Plug

probe

and

heater

power

up

procedure.

Continue

completed.

B1.2

Perform a temperature

B13 = Annually.

Three

to

run

for

Switch

Monthly.

Execute a performance

Carry

out

Electrical

B14 | Annually

Carry

out

Electrical

Safety

Or

In

Safety

power

cable

wire

Check

at

least

off.

probe

test

check

appropriate

checks

Accordance

checks,

for

(if

fitted)

for

30

seconds

as

outlined

as

per

see

damage

into

no

immediate

by

to

the

Appendix

With

Relevant

section

and

replace

heater

base

alarms

which

time

in

section

humidifier

B2.

Country

B2.

and

6.4.

model

as

necessary.

switch

and

correct

all

the

relevant

as

Regulations.

on.

Observe

display

internal

detailed

in

correct

of

ambient

tests

section

6.0.

operation

temperature.

will

have

been

of

page

63

RECOMMENDED
(PHOTOCOPY

Type

of

service

Humidifier

Step

Monthly

a)

Check

Temperature

b)

Check

Reusable

c)

Check

Heater

d)

Check Power

e)

Perform

Three

Monthly

Perform

Annually

Temperature

MAINTENANCE

AND

check:

Serial

Number:

Heater

Wire

Cable

Self-Test

SCHEDULE

FILE

IN

MAINTENANCE

MONTHLY / THREE

Probe

Wire

Connections

Probe

Test

CHECKLIST

RECORDS)

MONTHLY / SIX

Method

Refer

Appendix

Refer

Appendix

Refer

Appendix

Refer

Appendix

Refer

Appendix

Refer

Section

MONTHLY / ANNUAL

Date:

B1.1
B1.1

B1.1

B1.1
B1.1

6.4

PASS

[ 1 { 1
[

[

[1
[

[1

FAIL

] [

1 [ 1

[ ]

1 [ ]

[ 1

(CIRCLE

1

ONE)

Performance Check

Electrical

Earth
Measure

a)

The

b)

Should

Insulation

Use a 500V

on

the

a)

The

b)

Should

Earth

This

per
of

the

normal

Safety

resistance

the

heater

The

earth

be

0.2

resistance

mains

heater

The

earth

be

10

Leakage

has

to

be

UL544

tester

operating

Checks - as

test

resistance

plate

stud

on

Ohms

DC

tester

plug

to:

plate

stud

on

MegaOhms

test

measured

or

IEC601.

on

the

voltage

from

the

base

maximum

test

to

measure

the

using

Measure

heater

required

the

of

base

of

minimum

an

plate.

and

freguency

Refer

and

earth

pin

on

the

humidifier

the

resistance

the

humidifier

electrical

earth

leakage

Earth

leakage

of

Section

after

the

mains

from

safety

tester

with
current

supply.

6.0

any servicing

plug

to:

the

phase

pin

designed

the

earth

probe

is

measured

as

at

[ ]

[ ] 1
[ ]

[

[1

1

[1

[I

[ 1

[ 1

Should

be

0.5mA

MR730/720/700/480

maximum

in

no

fault

Technical

condition

Signature:

Manual # Revision D #

[ ] [ 1

Issued

October

1995

page

64

page

65

APPENDIX

C1

TROUBLESHOOTING

This

It is

MR720

and

Unless

hazard
circuit.

Low

a.

.
.

b.

9

C

is a guide

written

MR720

the

to

temperature.

Temperature

Humidifier
Standby

Check

Airway

Gas

resumed.

Set
Temperature
Gas

Too

shorten inspiratory hose

to

possible

for

the

in

the

heater

in

the

cause

and

the

patient,

less

warming

mode

-

push 1 sec

-

wait

20

minutes

position

temperature

flow

stopped

Note:

temperature

flow

rate

much

distance

MR730,

wire

heater

immediate

the

than

switched

to

of

probe

too

GUIDE

FOR

corrective

MR720,

on

mode.

wire

off

mode.

effects

humidifier

desired,

up - wait

disable

(30

should

no

on

standby.

minutes

temperature

low

alarm

activated.

or

interrupted - enter

Gas

flow

must

increased

low - increase

by

not

in

probe

between

so

that

more

end

THE

MR700

action

in

the

MR700

Parts

for a few

probe

of

of an

be

alarm.

for

version

in

and

this

alarm

immediately

minutes.

the

standby

be

resumed

than 2 °C - wait

housing - fit

gas

flow

of

heater

distance

is

SERIES

case

of an

MR480

guide

would

condition

3.0).

circuit.

mode

before

temperature

to

more

wire

and

between

RESPIRATORY

humidifier

humidifier

not

be

are

understood

models

switched

or

turn

humidifier

coming

than 2 litres

out

for

temperature

probe.

of

per

temperature

25

and

100

HUMIDIFIERS

alarm

condition

with

applicable

off

and

for

and

removed

off

standby

minute.

to

mode.

rise.

probe - use

mm,

ideally

or

the

MR730

the

MR480,

assessed

from

until

gas

longer

heater

30

mm

malfunction.

and

MR730

to

be of

no

the

patient

flow

wire

or

(1-2”).

.

Chamber

은

.

Poor

heater
which

.

Temperature
Heater

.

Gas

the

type

High

temperature.

a.

Airway

9

Sudden

.

Heater
that

.

Set

temperature

.

Temperature
configuration.

b.

Chamber

9

Humidification
and

No

water

Change

temperature

thermal

flow

temperature

plate

are

are

not

element

rate

of

chamber

probe

contact

manufactured

too

increase

wire

too

distance

have

is

probe

temperature

humidifier

in

the

in

the

low

alarm

between

clean,

smooth

not

inserted

needs

replacement - send

high

for

chamber - use

used.

high

alarm

in

gas

flow - wait

close

to

temperature

between

lowered

chamber

25

by

located

high

alarm

outlet

checked,

chamber

gas

flow

activated.

base

of

chamber

and

flat. If

by

Fisher & Paykel

at

chamber

activated.

for

‘temperature

probe - use

and

100

mm,

more

than 2 °C

inside

incubator

activated.

temperature

and

necessary

may

outlet - fit

for

repair.

correct

chamber.

shorter

ideally

30

(4

°C

for

or

under

too

high - remove

heater

plate - check

clean

or

replace.

not

be

suitable.

temperature

Refer

to

fall.

heater

wire

mm.

MR720) - wait

radiant

warmer - use

humidifier

that

chamber

Humidification

probe

correctly.

to

the

operating

or

lengthen

for

temperature

correct

from breathing

base

and

chambers

instructions

inspiratory

to

fall.

circuit

circuit

for

hose

so

MR730/720/700/480

Technical

Manual

#

Revision D 3

Issued

October

1995

page

66

Temperature
.

Ventilation

rates
control.

.

.

Excessive

Li

Excessive
9
.

.

Humidifier

-

shield

Check

water

Water

water
Chamber
Heater
probe
Temperature

configuration.

.

Excessive

ㆍ

Excessive

9
.

Inspiratory

water

Expiratory

liquid

Humidification
Maximum
correct

.

Humidifier

fluctuating,

rate

too

below

about

temperature

breathing

temperature

in

circuit.

trap

not

at

in

inspiratory

control

wire

too

close

so

that

the

probe

circuit

in

expiratory

heater

water

ejected

chamber

permissible

chamber.

chamber

high

and

low

low

or

too

erratic

6bpm

or

of a highly

contro!

circuit

from

external

probe

position

the

lowest

point

circuit

set

too

to

distance

located

being

circuit

wire

required.

from humidification

peak

Refer

due

high - reduce

temperature

is

between

inside

cooled

due

filled

beyond

flow

to

the

operating

tilted.

temperature

for

erratic

influenced

alarms.

proper

nature,

by

external

humidifier

influence.

in

the

circuit.

of

the

circuit.

to

rainout.

setting.

probe - increase distance

25-100mm,

incubator

by

air

conditioner - shield

to

rainout.

Use a dual

maximum

rate

of

MR700,

ideally

or

under

heater

wire

chamber

water

humidification

instructions

may

affect

heating

720,

30mm

radiant

circuit

adaptor.

into

levei
chamber

for

the

temperature

the

stability

or

cooling

730.
from

heater

(1-2").

warmer - use

from

air

circuit.

line - reduce

has

been

type

of

chamber

control.

such

of

the

as

wire

to

correct

Ventilation

temperature

air

temperature

circuit

conditioner.

water

lever.

exceeded - use

used.

conditioner

Low

humidity.

Chamber

No

water

Check

-

-

-

suitable.

.

Temperature

Gas
for

the

Temperature

.

.

ㆍ

Heater

a.

9

9

.

.

Temperature

Temperature

Temperature

wire

Heater

Heater

Heater

Heater

Heater

wire

control

in

chamber

heater
that

chamber

set

humidification

temperature

plate

temperature

base

Humidification

flow

rate

too

high

type

of

chamber

probe

alarm.

probe

alarm,

"- - -"

probe

unplugged - check

probe

plug

probe

faulty - replace

alarm.

alarm,

temperature

wire

unplugged - check

wire

broken - replace

wire

switch

tumed

wire

switch

turned

too

low - increase

chamber - fill

via

setting

and

heater

chambers

for

chamber - use

used.

on

temp

dirty - clean

still

heater

off - but

on - but

setting.

chamber.

chamber

which

on

plate

are

button - if

display
are

not

correct

display.

connection.

plug.

temperature

displayed.

connection.

wire.

heater

wire

heater

wire

MR700,

low check:

when

humidifier

smooth

and

flat.

manufactured

chamber.

probe.

connected.

not

connected,

720,

730.

is

by

Fisher & Paykel

Refer

to

turn

off.

switched

the

operating

on.

may

not

instructions

be

b.

Heater

9

ㆍ

wire

alarm,

Internal

Check

fuse

calibration

F2

on

temperature

blown - send

of

the

41

for

repair.

°C

comparator.

display.

No

temperature

a.

No

temperature

b.

No

temperature

.

display.

display,
Humidifier
Humidifier
Humidifier

Overheat

voltage
power
power

protector

Transformer

display,
Humidifier

failed

no

rating
cord
switch

operated - send

over

heat

"see

self

alarm

lights.

incorrect - select

not

connected

not

tumed

protector

test - send

operated - send

manual"

for

page

67

correct

to

mains

on - turn

for

repair.

indicator

repair.

voltage

supply - connect

on.

for

on.

rated

repair.

unit.
to

mains.

Breathing

9

Error

.

External

a.

External
9
ο

b.

External water

9

An

.

Standby

.

Check

or

code

Humidifier

water

Check
Check

Disposable

alarm

No

LED

Humidifier

-

-

circuit

water

LED

leak.

all

circuit

bag

on

temperature

microprocessor

leak.

water

leak

that

chamber

that

O-ring

leak

chamber

flashing.

audible

sound - mute

flashing.

in

push 1 sec
wait

20

minutes

connections,

connected.

display.

with

reusable

O-ring

is

not

with

disposable

in

use

standby

to

mode

disable

(30

check

that

Check

that

temperature

failed

self

test - send

chamber.

is

clean

and

damaged - replace

chamber.

for

too

long - replace

switch

has

been

standby.

minutes

for

version

humidification

probes

for

repair.

correctly

fitted.

if

necessary.

chamber.

pressed - wait

3.0).

chamber

are

fitted

three

minutes.

water

filler

correctly.

stopper

is

in

place

Set

Low

LED

.

Chamber

operating

MR730/720/700/480

on.

control

manual.

or

airway

Technical

temperature

Manual

control

#

setting

Revision D #

too

low - readjust.

.

Issued

Refer

October

to

humidifier

1995

page

68

MR700

Series

CHECK.

RATING

OPEN

UNIT

THERMAL

HEATER

CHECK

VOLTAGE

J5

ON

Fault

Flow

VOLTAGE

OF

UNIT

y

YES

AND

CUT

CHECK

OUT

PLATE

TRIPPED

ую

FOR

AT

POWER

v

MAINS

CONNECTOR

BOARD

YES

Chart

IF

UNDER

HAS

For

No

YES

|_|

no

д

Go

Condition

RESET

AND

СНЕСК

THERMAL

FIND

REASON

МАМ

CUT
FOR

LEAD

OUT

FAULT

(pl

CHECK

LOCATIONS

MAINS

REAR

CONTINUITY

CONNECTOR

AND

REPLACE

BOARD

REPLACE

BOARD

RETURN

CONNECTORS

BOARD

CONNECTIONS

SECTION

CONNECTOR

REPAIR

ARE

AND

FUSES

SWITCH,
OF

(F1 - F4),

OF

CONTROL

OF

J8-183

(SECONDARIES).

у

POWER

AND

TEST

Ν

νο

CONTROL

AND

TEST

Y

no

UNIT

FOR

ON

IN

CORRECT

SECURE,

BAD

ON

MAINS

POWER

CONNECTORS

TRANSFORMER,

GOOD

BOARD,

BOARD

(PRIMARY)

J9-182+

POWER

CHECK

AND

384

YES

YES

ON

BAD

REPAIR

>

COMPONENT

ASSEMBLE

>

PERFORM

PERFORMANCE
OUTLINED

AND

REINSTATEMENT

FAULTY

TEST

TEST

CALIBRATION

4.0

OF

MANUAL

AND

AND

IN

SECTIONS

THE

BEFORE

—>»

CHECKS

TECHNICAL

OF

UNIT.

>

|

AND

AS

3.0