MkIl Infant Flow M672 User manual

,7

THE

FOR

QUIIWI

BNTERPRllC

200L

AWARDS

E.M.E. (Electro Medical Equipmerrt) Ltd.

60

Gladstone Place, Brighton,

East

Sussex,

Telephone:

Fax:

+

44

Internet: email: infoaeme-med.co.uk

Bh12

3QD.

England.

+

44 (0) 1273 6451 00

(0)

1273 6451 01

http://www.eme-med.co.uk

E.M.E.

MK

(Electro

I1

Infant

Service

Part

Medical

Flow

Model

Number

M672

Manual

M672SM

Equipment)

TM

Driver

Ltd.

Version

1.10,

Issued

8th

November

1994

TABLE

of

CONTENTS

Section

About this Manual

Product Description

Produ~pecification

--

Summary of Cautions & Warnings Operating Instructions Performance Verification Procedure Routine Maintenance

Page

Electrical and Electronic description

Electronic Calibration Procedure

Mechanical description AirlOxygen Mixer

Parts List

Summary of Symbols

Product Change History

Warranty

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Section

1

About this

To assist the engineer and technician his manual contains Infant Flown System

MkIl

Infant Flowm Driver. We suggest that all personnel involved in the service, repair or re-

as

well

as

detailed descriptions of all component parts of the

Manual

111

operating instructions for the

M672,

calibration of this product hlly familiarise themselves with the clinical aspects and usage of the Infant

Flown System as well as the mechanical and electronic intricacies

as

this

will

assist in

front line service and troubleshooting.

The manual is split into several discreet sections which deal with the major sub-assemblies in order. This allows work to be undertaken in a logical and methodical manner on one section of the product without disturbing other parts. However, we recommend that the complete performance and

any part of the Infant

EM'

(Electro medical Equipment) Ltd. have a policy of continual improvement and update of

all

products. Technical bulletins are sent to

vescation procedure is carried out after any work

Flowm Driver.

all

registered users of the company's products to

keep them informed of any product changes. We welcome suggestions

-

improvement and enhancement

please write to the either the Marketing or Research and

has

been carried out on

from users for product

Development departments with your comments.

mk

.

~

Document No.

M672SM,

.>,

Version

1.10,

Issued

8th

November

1994

Page 1 of

85

Section

Product Description

The

EM'

Flowmeter and Pressure Manometer with integral used in conjunction with the make up the

-

The Infant Flowm Driver is assembled bespoke components. These are a Flowmeter calibrated for mixed gas between 0 and associated electronics,

supply.

Mk

II

Infant Flowm Driver is a combined AirIOxygen Mixer, Oxygen Analyser,

EM.

Infant FlowTM

EME

Infant Flowm System.

-

--

--___

in

NCPAP

a Beet aluminium enclosure-&om standard and

Sechrist model

an

electronic pressure measuring and

2

alarm

3500

15

systems designed specifically to be

generator. Together these products

Medical Aidoxygen Mixer, a Dwyer

lpm, a galvanic Oxygen Fuel Cell with

limiting

system and a mains power

The Infant Floww Driver is supplied with a pole mount bracket to fit round or square section

from

10

to

35

mrn

poles

M6

tapped holes to accomodate a variety of optional rail mount brackets.

diameter or section. The gas inlet plate is pre-drilled with two pairs of

The Medical Air and Oxygen gas inlets are either British Standard NIST or U.S.A. standard DISS fittings, other types can be supplied to special order. High pressure Medical Air and Oxygen hoses must be ordered separately

specifjring the length, colour and end fittings

required.

The patient outlet

IS0 standard

15

mrn

female taper fitting and the pressure monitoring

is

an

inlet is a standard Luer taper fitting. The Oxygen monitor is an integral part of the Infant Floww Driver and does not require any additional external fittings.

The Oxygen monitor uses a galvanic

fbel cell sensor which is fitted in a pressure controlled path to avoid variations in delivered gas pressure altering the measured value. The gas which is used for the Oxygen to avoid any

risk

analyser is subsequently vented from the rear of the Infant Flowm Driver

of contamination to the patient.

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

2

of

85

Section

3

Product Specification

Gas supply - Nominal 4 Bar (60 PSI) Clean, dry Medical Air and Oxygen. Range Power Supply

-

-Aidoxygen Mix-er-i2 1-to 1.00% Oxygen, =acy+-3% of selected output Flowmeter

Pressure relief valve

1. Patient safety

-

Minimum 2 Bar, maximum 6 Bar. Maximum differential pressure 2 Bar.

-

200 to 265 VAC 0.10 A 50 to 60

-

Range 0 to 15 lpm, accuracy

-

2 systems fitted

-

automatic electronic valve system preset to vent to ambient at 1 1 Cn~s H20.

+

Hz

or 90 to 135

-

5%

of selected output

VAC

0.20 A 50 to 60

Hz

--

2. System & delivery circuit safety - mechanical internal relief valve preset at 150 Cms H20. Manometer - Range, 0 to + 12 Cms H20, accuracy * 1 cm Hz0 Oxygen Monitor - Range 0 to 100% Oxygen, accuracy * 2% of span,

Alarm

electronic alarms are set after

System - Four separate

2

alarm

systems are provided all of which are automatic, the

minutes operation without operator intervention although the

operator can manually set or reset them if required.

1.

Supply gases failure, if the differential pressure between the two inlet gases falls outside of

the limit of 2 bar

(30

PSI) or one gas fails completely

an

alarm will sound and the gas at the

higher pressure only will be delivered to the patient.

2. High patient pressure, an audible and visual

This

alarm automatically activates a pressure relieving solenoid which instantly reduces the

pressure in the patient circuit to zero. A second

high

pressure alarm is preset at 11 Crns

high

pressure

alarm

with audible and visual

indication is set 3 Cms H20 above the measured CPAP pressure.

3.

Low

patient pressure, an audible and visual low pressure alarm is set at 2 Cms H20 below

the measured CPAP pressure or at

4.

Failure to deliver correct Oxygen concentration. Audible and visual alarms are provided at

0 Cms H20 if this would otherwise be negative.

5% of the set FI02 with an upper maximum limit of 101% and a lower minimum limit of 20%. There is a low hazard warning at 18% Oxygen or below.

.

).

'

Page

3

of

Document No.

M672SM,

Version

1.10,

Issued

8th

November

1994

85

c-,[

H20.

k

Section

4

Summary of Warnings and Cautions

The

EME

Infant Flowm Driver is a medical device intended for use only by qualified personnel

under the direction of a qualified physician.

Personnel operating this equipment are responsible for reading and thoroughly understanding

-ill

product documentation provided. Statements throughout-the product documentation have

special

Key to Warnings, cautions and notes:

si@cance as follows:

WARNING

CAUTION

attached to it.

NOTE

convenient operation or service of the equipment.

SUMMARY

-

Means there is a possibility of personal injury to the operator or patient.

-

Indicates there is a possibility of damage to the product or other equipment

-

Notes are used to call attention to statements pertaining to more efficient or

OF

ALL

WARNINGS

AND

CAUTIONS CONTAINED

DOCUMENT:

WARNING

Whenever a patient is attached to respiratory care equipment constant attendance

an

is required by qualified personnel. The use of

give

not occur with the system. attention.

absolute assurance of

warning

In addition, some problems may. require immediate

for every form of malfbnction that may

alarm

or monitoring system does

THIS

Document

No.

M672SM,

..

'

Version

1.10,

Issued

8th

November

1994

Page 4 of

8

5

WARNING

Mixer must be corrected swiftly as the Oxygen concentration which was selected

will

for the patient

not be delivered during an alarm/bypass situation.

-

WARNING

.

-.

.

--. . . - .

~-

Liquid water or other contaminants

. . -.

in

either gas supply, particularly the

.

-.

-

.

--

-

--

- - - . -

air

-

supply,

will cause malfunction of this equipment and equipment connected to it.

WARNING

The gas mixer incorporated in this product

-

do not modifjl the inlets to accommodate other source gases such as anaesthesia

is

designed to

mix

Air and

Oxygen only

---

WARNING

Oxygen vigorously accelerates combustion. To avoid explosion hazard do not use any instrument or other equipment that

may

have been exposed to oil or grease

contamination.

WARNING

The gas failure alarm will not function

Document No.

M672SM,

:,.

;

Version

1.10,

Issued

8th

if

both supply gases are below 2 Bar.

November

1994

Page 5 of

85

WARNING

Ensure that the voltage set on the Infant Fiowm driver is suitable for the local mains voltage. Equipment result

if

incorrectly set.

mains

power input module

mfinction and overheating

will

CAUTION

Verifjl that this device has been authorised for use

by

qualified personnel.

CAUTION

The precision gas mixing device incorporated hnctional or damaged if used without the protective water trap and filters

in

this product may become non-

Do not immerse

Document No.

M672SM,

any

Version

part

1.10,

CAUTION

of

this device or gas or steam sterilise it. Damage will

result.

Issued

8th

November

1994

Page 6 of

85

Section

5

Operating

The Infant FlowTM demand or expiratory flows via the specially designed

Infant Flow's

subject

--

-

-The nomogrm-showinrtk shown below. Example:-

to a

linear

system

ability

relationship between controlled enriched

provides a

to provide superior CPAP. However, the Infant Flowm generator is

virtually

relad~n~Epb~tw~nTnstantWa~~~G-rnd~flow

8

lpm

will

provide

Instruction

constant airway pressure irrespective of patient

nasal prongs.

gas

in

the order of 5 Cms

flow and CPAP pressure.

This

H20

is the reason for the

-settkgs is

Nasal

CPAP.

Flow

Document No.

Pressure Nomogram

M672SM

Version

1.10,

Issued

for

8th

November

the

EME

1994

Infant

Flow

Fresh

l/min

System

Page 7 of

gas

85

flow

Venfjr that this device has been authorised for use by qualified personnel.

Firmly mount the Infant Floww driver on either the pole and stand or the rail system with

1.

all

of the ancillary equipment such as the Heated Respiratory Humidiiier.

Connect the Medical Air and Oxygen hoses to the Infant FlowTM Driver and then to the

2.

high

pressure source.

NOTE: The gas failure

alarmlbypass will activate when the first gas

is

connected and will reset

upon connection of the second supply gas.

WARNING

Liquid water or other contaminants in either gas supply, particularly the air supply, will cause malfunction of this equipment and equipment connected to it.

Connect the power cord for the Infant Flowm Driver to a suitable outlet, do not switch on

3.

the driver at this point.

4.

Connect the patient circuit and Infant FlowTM generator as shown in figure

2.

NOTE:

This figure is a general indication of how the devices are interconnected. The actual

configuration may vary dependent on the ancillary equipment used.

Set the required

5.

F102

using the calibrated knob on the AirJOxygen mixer section of the

Infant FlowTM driver.

Set the flowrate to give the prescribed NCPAP pressure using the Nomogram on page

6.

as a reference.

7.

Set the desired delivery temperature on the heated respiratory humidifier

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

and

switch it on.

Page

6

8

of

85

NOTE: We recommend between

8.

There is a choice of head fixation systems. Each Infant Flowm generator is supplied with a headband Attach the Infant FlowTM generator pack or the instruction leaflet enclosed with the bonnet pack or the laminated card attached to the Infant

9.

Connect the Infant FlowTM Generator to the patient as shown and attach to the headband using the Velcro strips provided or to the bonnet with the tie ribbons.

10.

Switch on the power to the Infant FlowTM Driver and ensure that the NCPAP pressure is

that which is prescribed. Minor variations between devices occur but the pressure

delivered should always be within out of specification perform the following checks. The pressure bar graph has been colour coded for ease of use. The "Normal Range" section of the bar graph indicates the most commonly used pressures with the Infant pressures used for the treatment of individual patients must be prescribed by the clinician.

furation

fkation device of choice to the patient as shown on the instruction card in the

as

36"

and 37°C but never higher than 37°C.

standard or,

if

preferred, a bonnet furation is available separately.

Flowm Driver.

*

10%

of those shown on the Nomogram.

Flowm generator. However, the actual

If

they are

a) Ensure that there are no leaks in the patient circuit.

b) Ensure that the Infant

are properly fitted in the patients nostrils.

11.

The electronic alarms will automatically set after a 2 minute stabilisation period. Should you wish to set them earlier simply hold the alarm will bleep to indicate that your command has been accepted and the Alarms indicator will illuminate.

12.

Should you change the by holding the operation when changing the prescribed Oxygen

13.

What to do if may not be receiving the prescribed

alann window to

ArmfMute button in for three seconds. It is not necessary to carry out this

an

alarm occurs - Always attend alarm conditions immediately as the patient

Flowm generator has the correct size nasal prongs and that they

Armmute button in for three seconds. The

NCPAP

*

treatment pressure it is necessary to reset the alarm level

FI02 as the driver will automatically reset the

5%

of the set value.

FI02 or NCPAP.

Armed

rn

,F

There are two distinct types of alarm fitted in the Infant Mixer has a mechanical bypass and alarm system fitted which supply gases is below or above the range of pressure which can be handled satisfactorily.

.,.;

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Flowm Driver. The AirIOxygen

will

sound

if

Page

one of the

9

of

85

The second alarm system consists of Oxygen monitoring module. This

electronic alarms with the exception of the overpressure alarm are self re-setting. event of an overpressure being detected the Driver activates a vent to ambient solenoid

valve which removes gas flow

fiom the patient circuit.

an

electronic system built into the pressure and

has

several hctions

as

shown in the table overleaf.

-

In

All

the

Model

Alarm

function

r

Oxygen supply failure

Air supply failure

High

Oxygen Concentration

M672

Infant

FlowTM

Indication

Loud whistle.

Audible alarm indicator illuminated.

&

Driver

High

02

Alarm

Systems

Operator Action

Check and restore Oxygen supply.

Check and restore supply.

Check supply gases and galvanic Mute button to silence the audible alarm.

fuel cell. Press the

Air

Low Oxygen Concentration

High Pressure

Low Pressure

I'

-

.

Audible alarm indicator illuminated.

Audible alarm pressure indicator illuminated.

&

Low

High

low

02

Check supply gases and/or the galvanic the

ArmlMute button to

silence the audible alarm.

Check the check for occluded tubes. Press the to cancel the alarm or restore

pressure in the circuit.

Check the check for occluded or disconnected tubes or nasal prongs. Press the

button to silence the audible

alarm.

he1 cell. Press

flowrate and

Arm/Mute button

flowrate and

ArmIMute

Page

10

of

1.10,

Issued

8th

.

d

Document

No.

M672SM,

Version

November

1994

85

HEATED

HUMlDIFI

W

AND

HEATED

WIRE

DELIVERY CIRCUIT

I-

I

\

--/

I

\

/

PLEASE

If

we sug esi using product! so that the water can be pressurised.

cnamoer connector end)

a

Gmvitv

NOTE

Wder

Set

is beina used

'INFUSOR'

BAG

of sterile

(6r similar

r-------

7

I

i

:

I'

;

!

i

I

ELECTRICAL

SINGLE

(SEE PRODUCT

6ft

PRESSURE UNE

USE

LIST

MHAlATlON

(ADD

FROM

ADAPTOR

HEATED

FOR CONflGURATlONS

DELM2RY

-

EXENSION

ON

AND

EXTENDABLE

APPROX 15cm

Ift

BLUE

TUBE

to

55cm)

AND

PART

CIRCUIT

NUMBERS)

I

!,

A

NB

wnen

Document No.

It

is

a

Deot

Oxygen

M672SM.

of

'Heatth

Enri@ed

Version

recommendation that

Gases are being administered.

1.10.

Issued

8th

November

an

Oxygen Anatyser be used

1994

at

Page

ALL

1

TIMES

of

85

.

Section

6

Performance Verification Procedure

This performance veri£ication procedure provides a means of determining whether the

EME

Infant FlowTM Driver meets its design speciiications. These tests are intended to be performed

in

the Hospital by qualified personnel. The procedure should be performed at least every four

months or more fiequently

-The check list must be followed exactly and specifications it should be removed fiom service until calibration

if

desired or

if

the device is suspect.

if

the Idant FlowTM Driver fails to meet any

and/or service is

accomplished.

Service of the technicians trained access to the special tools and equipment that are required. or

an

authorised distributor to insure

EME

MkII

in

the calibration, service and repair of devices of this nature and who have

Infant Flowm Driver should only be undertaken by qualified

If

this is not feasible contact EME

full

reliability and safety of the product.

NOTE: It is recommended that hospital personnel responsible for the Performance Verification

Test maintain records of their activities and identify equipment authorised for use.

WARNING

Oxygen vigorously accelerates combustion. To avoid explosion hazard do not use any instrument or other equipment that may have been exposed to oil or grease contamination.

The tests are divided into three parts, the first for the Aidoxygen mixer, the second for the pressure manometer and the third for the Oxygen Analyser.

Some special equipment is necessary to perform the tests

hlly, this includes an accurate water

manometer, adjustable regulators and an accurate Oxygen analyser. Do not attempt to perform

the tests without suitable equipment.

First

Test

-

AirtOxygen

Mixer

Connect the Infant Flowm Driver to supply gases which are adjustable fiom 0 to 4 Bar or more. This can be achieved using adjustable regulator sets

Overall Accuracy - sit both supply gas pressures to Flowmeter.

Compaie Oxygen analyser readings to mixer FIO2 settings of

4

EMJ2

part No. SG100.

Bar.

Select a flow of

.2

1, .40,

15

LPM

.60,

on the

.80 and

Document No.

M672Sh4,

Version

1.10,

Issued

8th

November

1994

Page

12

of

85

1.00. The mixer has a specified accuracy of

f

1%

the setting and the analyser should agree within Accuracy with varying inlet pressures Oxygen analyser reading obtained with equal inlet pressures

3

pressures to the mixer to

Bar Oxygen and 4 Bar

f

3%.

If

the Oxygen analyser is accurate to within

4%

at the various settings.

-

Select an FI02 of 60% and observe the reference

(4

Bar each).

Air

and then 4 Bar Oxygen and 3 Bar

Vary

the inlet

Air.

Note the Oxygen analyser reading at each extreme and verifL that the Oxygen reading does not

vary

by more than 1% at each extreme.

-

Alarm module test (The alarm should be silent) reduce the

Starting with the Oxygen and

Air

should sound and the Oxygen analyser should read 100%. Increase the slowly, the alarm should cut out at around the

Air

supplies at 4 Bar and an FI02 of .60

inlet supply to 2 Bar or just under. The alarm

Air

supply pressure

3

Bar level. Repeat the procedure varying the

Oxygen pressure. When the alarm sounds the Oxygen analyser reading should drop to 21%.

Air

-

Observe the

inlet filter.

If

this is

dirty

or wet it should be replaced.

Second Test - Pressure Manometer

Tee an accurate water column with the hand pump bulb in line into the pressure input port on

front panel of the electronic module. Check that the manometer is at Zero then inflate the

the

system to 10 Crns H20 and observe that the bar graph display indicates 10 Crns doesn't, refer the device for

Press the

ArmfMute button for 3 seconds to set the alarms and then increase the pressure to 1

full calibration.

H20. If it

Crns H20, at this point the pressure vent valve should operate and the alarm sound. Increase

the pressure to over-range the bar graph and ensure that

in

pressure

Press the

the system.

ArrnIMute button again to reset the system and inflate to 5 Crns H20. Reset the

all

of the LED'S light up. Release the

alarms and allow the pressure to drop to Zero. Observe that the low pressure alarm activates immediately. Press the 5 Crns

H20 and observe that the visual alarm cancels.

Set the pressure to Drop the pressure to

ArmMute button, this should silence the alarm. Restore the pressure to

8

Crns H20 and observe that the high alarm activates after 15 seconds.

3

Crns H20 and observe that the high alarm cancels and that the low

alarm activates after 15 seconds.

h

\

1

7

Third

Set the

FI02 to

.21

and the flowrate to 8 lpm, observe that the Oxygen reading is 21%. If it is

not adjust the lower potentiometer accessible from the

Set the

FI02 to 1.00 and observe that the Oxygen analyser reads 100% after 1 minute. If it is

not adjust the upper potentiometer accessible

100%.

If adjustments are found to be necessary repeat this procedure two or three times as

test

-

Oxygen Analyser

from the left hand side of the driver to read

left hand side of the driver to

there may be some small interaction between the controls.

.>.'

Document No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

13

read

of

85

21%.

Additional Information on

Oxygen

Fuel

Cells

Material Safety Data:

&

Physical

Chemical Data:

Health Hazard Data:

Exposure limits:

Product Name

Potassium Hydroxide Lead

(Pb)

Primary

OSHA ACGIH

routes of entry: Ingestion, Eye/Skin Contact.

PEL

TLV

Pure

.05

2

-

Class

R-22TED

(KOH)

mg/cu.m.

15%

(Pb)

(KOH) Effects of Overexposure: Ingestion: The electrolyte could be

hdl or fatal

if

swallowed.

Eye: The electrolyte is corrosive, eye contact could result Dermal:

The electrolyte is corrosive and skin contact will result

Inhalation: Liquid inhalation is unlikely

SignslSyrnptoms of exposure: Contact with skin or eyes

will

cause a burning sensation andlor a

soapy feeling for skin contact.

Oxygen Sensor

Granular

in

permanent loss of vision.

in

chemical bum.

Emergency and First Aid procedures

15

Eye Contact: Flush with water for at least

Skin Contact: Wash

affected area with plenty of water and remove contaminated clothing. If

minutes and get immediate medical attention.

burning persists seek medical attention.

-

Ingestion: Give plenty of cold water

do not induce vomiting, get medical attention.

Handling Information:

Handling precautions: The Oxygen sensors are sealed and under normal circumstances the

contents of the sensors do not present a health hazard. The following information is given as a

guide in the event that a cell leaks.

Protective clothing: Rubber gloves, chemical splash goggles.

Clean-up procedure: Wipe down the area several times with a wet paper towel. Use a fresh

towel each time.

Protective measures

during cell replacement: Before opening the bag containing the cell, check the cell for leakage. If the cell leaks do not open the bag. If there is liquid around the cell while in the instrument put

on,gloves and eye protection before removing the cell.

Disposal:

Document 'No.

Should'.be in accordance with all applicable state local or federal regulations.

Page

M672SM,

Version

1.10,

Issued

8th

November 1994

14 of

85

Section

7

Routine Maintenance

Routine maintenance of the Infant Flow* Driver is limited to monthly checking of the Oqgen

analyser calibration and periodic

Mixer and Electronic Pressure Manometer, status of the gas inlet jilters, integrity of the alarm

systems and cleaning of the exterior surfaces.

(4

monthly) checking of the calibration of the Air/Oxygen

-.

-

An

Infant Flowm Driver need of re-calibration, service or repair must not be used until the

necessary procedures are

performed and the equipment has been tested to ascertain that it is

fbnctioning correctly.

full

EME

The

Model M672 is available to qualified technicians to effect calibration, service contact

EME

or

an

authorised distributor to insure

Mk

II

Infant Flowm Driver Service Manual

and

repair.

full

reliability

and

safety

(Part

No.

M672SM)

If

this is not feasible

as

special tools and

equipment are required.

Routine maintenance as defined

in

this manual may be accomplished by competent individuals having experience in the maintenance or repair of devices of this nature. Parts designated in this manual should be replaced only with parts manufactured or sold by

EME

(Electro Medical

Equipment) Ltd.

-

Gas Inlet Filters

There are three gas inlet filters, two on the Air inlet and one on the Oxygen inlet. These must be replaced periodically. We recommend that this is done annually unless the Infant

Flowm Driver is being powered by a portable

recommended that the

Air

filters are changed at least every four months.

Air

Compressor. If this is the case it is

-1

The exterior Air filter can be observed through the polycarbonate bowl. If it is discoloured or wet it should be replaced, re-order part number M11294-5B.

The internal filters are sintered stainless steel. These should be changed annually or more fiequently

if

there are signs of contamination. It is recommended that the "0" ring seal and

spring are changed. at the same time as the filter. These are available as a kit under part number

S3

522K.

Page

15

of

Document

No.

M672Sh4,

Version

1.10,

Issued

8th

November

1994

85

CAUTION

The precision gas or damaged

Changing

the

mixing

device incorporated

in

this product may become non-functional

ifused without the protective water trap and filters provided.

Oxygen

Sensor

The Oxygen Sensor must be changed annually or when calibration is no longer possible. The sensor is located in the mechanical section of the flowmeter. To gain access to this it is necessary to remove the top cover of the enclosure. is achieved by removing the four

lifted

cover can be remaining two

oE Remove the four

M3

x

mm

instrument head screws on the electronic module. The module

M3

x

6mm

M3

Znfant FlowTM Driver immediately behind the

instrument head screws

x

8mm

pan

head screws on the rear cover and the

(2

on each side), the top

This

can

now be slid forward to facilitate easy removal of the Oxygen Sensor. Carefully remove the electrical connector clip and unscrew the Oxygen sensor number is

MR22.

The new Oxygen Sensor must be carehlly screwed into the block, ensure that the

fiom the old cell by using a small blade screwdriver to release the locking

fiom the flowmeter mounting block. Re-order part

"0"

ring

is fitted before screwing in. Fit the electrical connector into the new Sensor observing the polarity. Re-assemble the Infant the Oxygen Sensor to stabilise before performing the Infant

Flowm Driver for use with patients only after calibration is satisfactory.

FlowTM Driver and switch on the power. Allow two hours for

full two point calibration. Return the

Galvanic Oxygen Fuel Cells tend to

drift for the first few days and it is recommended that the

calibration is checked daily for the first three days after a new Sensor is fitted.

The exterior surfaces of the

Infant

FlowTM Driver can be cleaned with a mild soap or liquid

disinfectant solution. Do not use cleaning agents that contain abrasives.

CAUTION

Do not immerse

any

part

of this device or gas or steam sterilise it. Damage will result.

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

16

of

85

Section

9

Electrical and Electronic description

Four circuit boards comprise the Infant Flowm Driver electronics. These are the power supply board, the display board, the processor board and the mixer monitor board.

The Power Supply board is mounted on the side of the case adjacent to the mains input

-

--

-module. The board contains the mains transformer, T1; which has two primary windings so that they may be connected in series or parallel to suit a range of input voltage conditions. The transformer is protected by a non-resetting thermal combined flying leads. Voltage selection is made by

IEC connector, filter, mains switch, dual kse carrier and voltage selector to the PCB

lifting a flap under the fbseholder and sliding the tray out. The voltage selector may then be withdrawn and refitted voltage available. Four settings are provided, these are

kse. The mains input is taken &om the

as

required to suit the mains

100V, 120V, 220V and 240V.

A

f

The transformer has four secondary windings which are connected in two pairs to provide the inputs to the two bridge rectifiers In series with each of the secondary windings is a

rail and

the

reservoir capacitor for the

hses F5 and F6 are for the f 15 VDC rails. The transformer secondary windings for

+

5 VDC supply are connected in parallel to increase the current available. C3 is the

+

side panel behind the power supply board.

BRl for the

5

VDC regulator,

+

5

VDC rail and

BR2

for the

*

15

hse. Fuses F3 and F4 are for the

REG

3 a LM309K, which is mounted on the

REG

3 is connected to the power supply board with

VDC rails.

+

5

VDC

flying leads.

The transformer secondary windings for the centre tap to ground. The other two connections are used to supply the AC inputs of produce raw DC voltages which are referenced to 0

REG1

capacitor

via reservoir capacitor C1 and the negative output supplies

C2.

The regulator pins are bypassed with ceramic capacitors to improve their

*

15 VDC supplies are connected in series with a

BR2

V.

The positive output of

REG2

BR2

supplies

via reservoir

and

transient response and all the power supply rails are fitted with discharge resistors to ensure that they are safe when the power is turned off or disconnected.

Power is conveyed

fiom the power supply by a cable with a five way power connector at each end. This connects to the CON2 on the processor board. The display board receives its power via the forty way connector,

CON1, from the processor board.

rn

'i

The display and processor board are mounted display board are routed through the 40 way connector

as

a pair on the front panel. The signals to the

CONl.

The pressure bar graph, D4 to

D 16 and the "Alarms Armed" LED'S D18, are driven by IC2, a MM5450N LED driver. The

alarm LED's, D 1 to ~3'and Dl 7 are driven directly fiom port B of the Micro-Controller. The

Page

17

of

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

85

,

.

seven segment Oxygen concentration displays, ICM7212AMIPL display driver. Also fitted on the display board is the button,

SW1, and a NORPl2 light dependant resistor, LDRI, for the auto-dimming of the

displays. The luminous intensity for the displays is controlled by a signal derived

LD1

to

LD3,

are driven by

"ARM/MUTEM

fiom

IC1,

push

LDRI.

an

The two display drivers require dierent signals to change the brightness of the displays so two

op-amp circuits are provided on the processor board.

The processor board fits behind the display board and is connected to it by a 40 way connector,

CONl. The instrument is based around a Motorola MC68705R3P micro-controller,

ICl. This device is one time programmable and, should it become defective, can only be

fiom

EME

replaced with a pre-programmed device obtained

he

micro-controller contains the following elements:

or an authorised distributor.

6800 Micro Computer 24

Bi-Directional

8

Input Only Lines

8

Channel Analogue To Digital Converter

3776 Byte Programmable Read

UO

Lines

Only

Memory

1 12 Byte Random Access Memory

8

Bit Timer

7

Bit Pre-Scaler

Memory Mapped

I/0

The Micro-processor clock signal is generated by XTLl and C2, capacitor. There is no provision for adjusting the

The pressure sensor

PT1,

is a SensymEME solid state device having a range of 0 to 1 PSI

frequency

a

4

MHz

external crystal .and

of the oscillation.

which is fitted directly to the processor board. It can withstand up to 20 PSI without sustaining damage. This item is not a standard component as it is specially selected to our specification for low noise same specification obtained

The reference section of the section of IC8 to produce 12 V to energise the pressure sensor. The signal conditioning for the pressure sensor with potentiometer stage gain. Stage 1 of

APMO2 so that any offset

the sensor circuit is applied to the analogue input signal is ensures that the inputs to the micro-controller cannot go outside the limits of the

IC4,

and

zero temperature drift at zero. It must only be replaced with a device to the

from

EME

or an authorised distributor.

LMI

0,

IC5,

a

LM324,

can

IC8, produces

is used in conjunction with

be trimmed out. The amplified output

200

mV which is amplified by the op-amp

AMP02,

VR3

being used to adjust the

VR7

IC7, provides the

to swing the output of

from

the pressure

AN0 of the micro-controller. In parallel with this

an

SGS

Thomson L9700 or Texas Instruments TL7726 precision clamp. This

ADC

reference.

Input

AN1 on ICl is used for the signal conditioned mixer monitor potentiometer. This potentiometer is connected between depending upon amplifies the

Document No.

wh&e the mixer shaft is set. Stage 1 of IC6, an LM324 quad op-amp,

signal'and IC6 stage 2, provides an offset to ensure that the output achieves

M672SM,

Version 1.10,

Issued

OV

8th

and

5V

November

and feeds

1994

an

output of a proportion of this

Page

18 of 85

a

level of

O.05V

at

21% 02

and

5V

at

100% 02. VR6

adjusts the offset and This section of the electronics is used for determining the Oxygen used to clamp the signal to the micro-controller. Xnput monitor. IC6 stage

3

whilst stage

gain.

IC4

provides the necessary amplification.

is used to clamp the signal. Input AN4 on IC1 is spare and is connected to ground to

4

provides an offset to

trim

out any zero error from the Oxygen sensor,

AN2

on

VR8

adjusts the offset and

IC1

prevent noise pick-up from getting into the measurement circuitry.

VR5

sets the span.

alann

limits,

IC4

is

is used for the Oxygen

VR4

adjusts the

again

The display brightness levels are generated from the Board.

A

resistive circuit,

VR2

and

R11,

is used to set the overall brightness level and the fed-

NORP12

signal fed back from the Display

back signal modulates this. The brightness of the 7-segment displays is set by the diierence between this level and

set a constant current dependant upon the voltage at its wiper. IC5 stage

-

--

form a voltage controlled constant current-source.

The audible MOSFET

alarm

TR1.

15V.

The brightness of the LED'S is adjusted by using trimmer

3

and transistor

-

--

VRl

is fitted on the Processor Board and is driven by the micro-controller via

The audible alarm is powered from the

+5V

rail and is a high efficiency type,

to

TR2

fly

selected for its high output at low voltages.

An

over-pressure relief valve is fitted in the Mat FlowTM Driver to vent any excessive

pressures to atmosphere. This slave over-pressure valve is driven by the micro-controller using

a

solenoid valve as a master. The power source for the solenoid valve is a three terminal

regulator,

MOSFET,

REGI,

TR3,

connected as a constant current source. The solenoid valve is operated by a

connected

in

series with opto-coupler, IC9, to monitor the functioning of the

solenoid valve circuit.

Also fitted on the Processor Board is a two-stage watchdog circuit. The first stage, Silicon General inverter is connected so as to allow monitoring of the minus

5V

The

and 15V power rails are monitored by Sense 2 and Sense 3 inputs respectively. The

SG3548N which has four sense inputs, an inverter and a threshold input. The

15V

power rail by Sense 4 input.

IC2, is a

Sense inputs are checked for voltages both over and under the set levels. The tolerance on the

over and under voltages is set by using the threshold input. The resistors, R6 and

R8,

set the window width to plus and minus 5%. The line input, which is normally used to monitor an ac input, is used here to gate the watchdog reset pulses from the micro-controller with the power supply monitor signal to produce the wired-and output at pins

7,

9 and

10.

Whilst

all

is well, this pulsating signal is applied to IC3 pin 6 to prevent timing out of the watchdog. IC3 is a Maxim

MAX694CPq Supertex MP694P or an

circuit, of which only the

1.6

second timer is used.

AMD

AD694AN microprocessor supervisory

If

any power rail goes above its permitted

value, the ON output at pin 9 will go low; if any power rail goes below its permitted value, the

UN

output at pin

10

will go low. In either case, the watchdog reset pulses

will

be interrupted and the micro-controller will reset after 1.6 seconds delay. C7 provides a short delay on operation of the sense inputs to avoid operation on transients.

is

The mixer monitor controller shaft position.

Document

No.

M672SM,

mounted on the panel of the mixer unit where it is used to monitor the

'

.:

I

Version

1.10,

Issued

8th

November 1994

Page 19

of

85

Cj

1

Trouble

Shooting

Guide

Problem or Fault

The electronic module does not function at

-

all.

Electronic Module

continually resetting

All displays dim

Possible cause

No mains power

Power Supply faulty

+

-

5 VDC faulty

15 VDC faulty

15

VDC faulty

Auto dimming circuit faulty or not set.

Rectification

Power cord connected? Mains switch turned on? Voltage Selector correctly set? Check primary fuses. Check plug

Power connector plugged

Check Check

hse (if

PSU

secondary fuses.

BR1

and

BR2

fitted)

in?

Bridge rectifiers.

Check Voltage regulators.

Check

VRl

VR2

Check LDRl Check IC5

Audio alarm works but

visual does not.

Visual alarm works but audible does not.

Manometer display

off.

Parts of Manometer display missing.

Oxygen display off

Segments of Oxygen

display missing.

Alarm LED's defective

Bleeper faulty Bleeper driver faulty

Faulty driver.

Faulty driver or Faulty

LED'S

Faulty driver or

Oxygen monitor disabled

Faulty driver or Faulty display

8'

Check

Alarm

LED's.

Check bleeper Check

ZVN43064

TR3.

Check MM5450N7 IC2.

Check

MM5450N,

IC2

Check LED'S.

Check ICM72 12AMIPL, IC 1. Check

Check

LKI

on processor board.

ICM72

1

ZAMIPL, IC

1.

Check 7 segment display.

?.

.?

Document No.

M672SM.

Version

1.10,

Issued

8th

November

1994

Page

20

of

85

- -

FJ-~oT

HW

sn

Q.H3

19

/a

WW

0-

'5F9("

'.="

'1'0

"

13

7-

LL~

.,

,

dd~

1

T6ZL'L

11M

1

amn

NW

I

I*qavm1~\

A

sun

I

ISLdSDH

rm

9.1

c

-

/~~~P*IB~

9

6

01)

4

'mqrvrl)

(I

00L

1

ISLdUlH

zm

9'

1

-

IDtH

ldl~,lZLM3

2

0)

tl

I1

+I

4

c(

NWW~$OJ

-

NTI~UNO~'~

Utl3813

i

I

,

I

OWOB

Ot

6Z

cll

LO

31

'~qae01b'

El

t1

51

d

oqaprlb

m

I

ISLdW

9.1

N33AXO

AVldSIO

BZ

I0

C

91 LI

61

I)

)I

zI

~m

I

----------

iu

MAN1

LZ

00

91 02'

f*

I

I-,,,,

-

aof

-

-ph~

ZC

It

ZYll

1m

t

A

q

a

P-

It'

ZZ'

It'

tt'

d

I

ISLdMH

g.l,-----I

J

92'

IIIIIII

0.n~

~33

-

tn

~-

lm

5

Lgy~

1s

SZ'

I

7

30

4y

-

1

VUh

>>I

-

c-

50

(KLD

10BDMM

p.

sQLaeuwm

KUI)

r

-

XQ

-

(ah

~IUS

m2

-

mn

%I

c

a

20

10

w

all

Im

II

rn

snm

J

3mds

L

nm

moi

wo

nm

H~H

(a01

(HIH

1

3nnsw)

3msswJ

nww

1"

10'0

Z3T

NMO

nwn

WMUDSQ

3n1w-am

1

(0)M

IU)N)

-

11

ZI

01

cc

tc

IC

zc

62

OT

Ct

51

91

ic:

b

rl

a1

L

OZ

4

6

L

9

F

I

L

IN03

-

2

cu

0

4

P(

a

8

d

0\

2

3

E

2

&

3

B

I

CI

5

4

672005

Document

PCB

COMPONEN

No.

M672SM.

Version

JDENTlFlCATlON

1.10.

Issued

8th

November

1994

Page

22

of

85

SLIJ

b

-

-,

,;l2-@0-Z.9

I.---

[(ad

sru

-

dd~ ~6-SO-81

O,H~

-

O:&'i

Xva

au

-

1

N~O

-

~INO~I.<~

I

-

dm

-

2

YW

-

Assv

mlaa

-

egd

MOB

-

--

AH~SIS

dd~-(l.~3

4-

WANI

31111

xijj3

S'r'a

1

ZLONXHI~

9-

1

SSI

315

31~

.(6/1*

'

Z

.

--

v v

--

_

__

--

__

_

--

1'31

-

--

-

PZ

EZ

-

z

1z

oz

61 8

1

-

LL

9 1 SL

--

P

L

rl

-

z

1

- - -

-

0

1

.

--- .

6.

0

.

--

L

--

9

-

S

.

--

-

.

P

-

E

z

L

--

-

I~IWVZIZL~~~

~J~JZXW~JS~HNI~~~O~~

UUJZ

~J~JZ

038 3H 'AVldSlO lNIW33S-L 1~~la3

--- - --

lHEIIV8lS AVM

~IOlSISItl LNVONIrllO 11 131

t131~3~10d

OUV08 1103813 OIlNlHd WldSlO

hC9x0.0

833

-----

-

Z3

.

-

--

.-

-

--

-

1 1

P

s s

I

P

1

-

1

.

--

Z

L

r

--

Z

1

-

ldlWVZlZLW31

NOSPSWW

1a31-I l 11

JO

EZ 1 bSAW

(~Is~I~~NI)

HO~~~~NO~IWIS

~91ll03NIY

JO

H3U

SIUUVH

IVN

MlVllD

8la'~i0'\l~'010

131 131

~ia~~~a'r~a'sa-~a

L

~a'g

i

a'ra'za'

--

/

1 ISLdSaH

_

__

_ . _

__

-

Z L dllON

- . - . -

-

AI9-ln LO'O-ZOS1W

-

--

13-S-01 Z-ti31 311~~s

OZ

SO

--

866-

--

.

L

ZW

.

-

(IBV13Vd-d-WlMIH

I

--

-

- - - - - - -

--

P

-

I

-I

XINO'IIS

-

VWlM

--

NIM8VH

---

- - -

--

-

- - -

rai

~al'l01'

EZ 1

-

la

a1

1801

-

--

-

13'13

1MS

'za~

'la1

131' 131

IN03

t13~lua

NOSPSWW

x

~JWS

x

W~JS

--

-

AOOl

Yl'O

NOllflEHSfld H311MS

--

NI~

Nld

OZ

+

AVI~SIO

83~1tla a31

~0113~ a31

IH

a3u a31

ZYL

tlOlSIS38

.

-

--.

80113VdV3

-

80113VdV3

01 ~130s 31

OP

UY30S 31

OZ

83aV3H Nld

-

--

---

-

1

--

ZlZLS3

OSPSS~

~ZIPS~~

TZIES~I

EZLLS~~

-

--

ZYl83

--

ZI(11Hl

---

~9/L0'33

-

- - -

300

I/

SN1dB

dl01~3 dlOPH3

8860ZH3

SOOZL9W

~tlvw~tl

ON

18vd

UI~~~~~VA~NVCY

,

tl3tlnl3v~n~vw

I

A38 dwo3

At0

Nolldiu3s3a

I

ON

1301s

1

w1i1

1

n-~mpnt

Nn

Mh72SM

Version

1.10.

Issued

8th

November

1994

Page

24

of

85

672006

Document No.

PCB

COMPONENT

M672SM

Version

IDENTIFICATION

1.10.

Issued

8th

November

1994

Page

25

of

85

"'k

I

MS

ld-900-ZL9

---------

I-iad ddv

srtl

a,~3

PG-SO-oz

COS

EO

ON

lSl1

,,,

11va

au

Ntla

-

1

-X99ZE SNBnOB

I

-

1

-X99ZE SNBnOB 8tlA'Ltl~

I

(UW03ltll

.

sOWOLm

1

SNWOB

Z

)1W

ASSV

tl3AlHl

LtlA

03d tlOSS330tld

Mold

1

-

Z

lNVdNI

U!P/L u!P/~ 101 Ntlnl

YOS

Ntlfll

ddV O,H3 N33 31s 31Va

s.r.3

zloKwo

33111

SZ

-w

t13UROllN310d SVt11OSd3 t13UROllN310d SVUHO 1 d3

~)a

tb+~/,

ssl

I

_

I

311HM 10 1 3dM

ZZ

OZ

C86-OZW

1-1

I

I.._

S3H3nH WVl111lM Oldl-Id1

1

.

--

I

-

OZ'81-~1'8'~-E'13

.

NIMWH

--

.

-

.

--

.

I

931'L31'P31'C31

--

1

21

(

3lWVB33 A00

f~l

1

NO3

.

631

93I1S31

--

1 Z 1

-

1 1

P

.

-

--

ll131VtllS

1

An

1.0 BOU JdV3

.

-

..

AVM P lSOd 3SV8

--

AVM C lSOd 3SV8 AVM Z lSOd 3SVB

t130tClH lH3lVtflS AVM

VM

OZ

Nld 9 UH30S 31 Nld 8 UH30S

Hld

Nld

+-oz

__

PI

UH30S

1-1

IS31

S

5

_

-

31

1

.

-.

. .

--

dlb lH3

- - -

ZNU

1

Ntl

1Ntl

iYPNtl3

PXY IN83

-

UJ~~OS

YOZL

%I

szsuw

SdIllHd 6Ztl

-'I-

P

OC'SZ'ZZ'OZ'GI'k

PZU4CZd'9

S~IIIH~

SdIllHd SdIllHd

AVHSIA

7011133dS

SNllnOEl

P

.

.-

--

v

(SOL - I

wddos

uJdd0S klOZ1 21 SZStlW

wddos dlS XI SZStlW

-XZSZT)

LYZ

XL

u~ddo~

nz

%I

XZ UZZ

W

L

POL

-

L

SZSHW

SZS~W

ldj

Pi 3dM

-X99ZE

(sN~~~oB)

ZTtl

L

I

ZLd'6tl

SLU

l'f

L'OL'FLI

SU'PU

~tl'zd'~

LZH'9ZU

Z

-

L

6

Ltl

I

etl

L

I

z

-

--

LLU

~~tl

rrtl

c

I

9tl

lrtl

P1U

PtlA 9UA

L

Z

L

I

XZ I091 tlOlSIS3tl XL NOZI tlOlSIS3tl XZ UOOI UOlSIS-Jtl XZ ]El tlOlSIS3d XZ IZL tlOlSIS3tl

xz

101 tl01~1~3d

-

XZ 8Y9 UOlSIS311

xz

zng

xz

LIP

XL

LIZ

xz

znz

XI

nz

xz

YI

Xl tlOZ I UOlSIS3tl XI tllS tlOlSIS3d XZ

tlzz

dOOtld3WVlj MI XZ UZZ klOlSIS3U

u!P/L

WL

NUnl SZ M3UWOllN310d

u!P/L ~00iNtlnl SZ U313WOllN310d

-

---

UO~SIS~~

tlols~s-~tl

~JOISIS~H

tlo~s~s~tl

UOlSIS-Jtl

UOISISI~~

tlOlSIS3tl

109IU3 YOZlt13 )1001tl3

U1Ltl3 IZLtl3

IOId3

819U3

-

zn9tl3

--

L~PU~

-

--

LIZW

'

.

-

znztl3

YZU3 n1~3

.

--

tlOZLU3

uLSU3

tlzztl3 MLUZZtl3 SVtlYJLd3

--

-

SVtlM001dl

1P

9P

SP PP EP

ZP

IP

OP

61

gT

-

LC.

91

SF

PT If

z1

L1

Of

62

-

.

sntlvw3~

ON

ltlvd tl3un13v~n~vw

tl3tln13v~n~vw

I

~3tl dw03

MD

~01ld1tl3~3a

ON

1301s

~311

-

F

J

.

,

i

CD

2

z

0

is

4

C

8

C

-

o

I

fl.

3

z

9

CD

B

T

C

\O

w

P

ITEM

57

58

:--

59

60 6

---.

62 EHSM4L AUDIBLE ALARM

-

63

164 ES68705

--.

65 ES3548 QUAD POWER FAULT MONITOR 66 67

68

69

70

7

72

73 74

75

76

77

78

STOCK No

ET5087 ET4306

EV317L

1

ES694

ESlO ES02 ES324 ES9700 HEX PRECISION CLAMP

1

ESCNY17 I OPTO-ISOLATOR

TRANSISTOR PNP LOW NOISE

-

TRANSISTOR N-CHANNEL DMOS

-

a

REGULATOR ADJUSTABLE 1 OOrnA

-

MICRO CONTROLLER PROGRAMMED

-

1

MICRO PROCESSOR SUPERVISOR

1

INSTRUMENTATION AMPLIFIER

I

QUAD OP-AMP

DESCRIPTION

I

APM1801

M641009 1 TUBE PRESSURE TRANSDUCER

I

PRESSURE TRANSDUCER

I

F3161

F3NN

I

SCREW PAN

1

NUT NYLOC

HD

M3

x

0-1

16

LG

PSI

SS

QM

1 TR2

--

2 TRI ,TR3

.

-

1

--

.

-

.

-.

REG1

-

.

--

1

A11

-

- - -- - - . -

1 - IC1

1

IC2

1

--

IC3

1

IC8 IC7

1

IC5JC6

2

IC4

1

1C9

1

PTI

1

2

COMP REF

- - -

-

REMARK

--

---

- - --

-

--

-

--

PT 1

PT

1

-

MANUFACTURER

-

NAT SEMICONDUCTORS

-

ZETEX

-

NAI SEMICONDUCTORS

SONITRON

-

.

- - - -

MOTOROLA

---

SILICON MAXIM,SUPERTEX

PMI

SGS-THOMPSON

QUALIW TECHNOLOGY

--

POWER

p-

_-_

----

or

-

--

ANA

--

-.

-

DDI

-

__

MANUFACTURER PART No

2N5087

ZVN4306A

---------

LM3 1 71Z

SMllRL

MC68705R3P SG3518N

MAX694CPA, MP694P

AMP-02

L9700

CNY 1 7-3Z

.-

- - - - -

A

or

CP

--

_______-

-___

-

----

__

---

--

-

or

ADM694AN

----

-.

-

---

-

2

&QC

ISS DATE

--.

UA

m~on

SIG

I

ECN

R.~.s

CH'D

APP

TITLE

INFANT

PROCESSOR PCB

FLOW

DRIVER

ASSY

MK

2

t~~m-0~

I

-

.

--

ORN

€AD

DA~E

-

- - - - -

20-05

PAR 1 S

LIST

NO

672-006-PL

- - -

-91

-

CH'D

(

APP

RJS

--.

PDII

-

SIIT

J

:,

Document

No.

M672SM

Version

1.10.

Issued

8th

November

1994

Page

29

of

85

520025

Document No.

PCB

COMPONENT

M672SM

Version

IDENTIFlCATlON

1.10,

Issued

8th

November

1994

Page

30

of

85

M3

b

JO,~-@O-TZS

11%

S

I'

'd

n~o

aj~

<

dd~

alH3

-

$6-SO-FZ 31V0

- -

ON

0fl N8a

1

HA-~SB

T

VWOOS ZOSS

A1NO WdV

--

a0

01 d~

(

\

f

<

L

1SSf LC0 BVj

VUJOSZ

1fSE LC0

3WOOLtEIA9 1WS

3WOLP BAOGVXS

WPLP

WPZZ

an

sl,d

IS^

ZOSS

VI

ZOSS

XVj

IX

t

GLWI

131;

LHL

wi

WZOM

VOCZ~

V01Z3

-

I

a3n031bA

I

x--

MIWOO03

I

ot~anvl

N31MS30

M31tlflH3S

10

801Vl

UOd

)\SSV

1

--

131MS38 N31MS38

t131tlflH3S

~S~~OL~~~NO~IW~S

IsI.~o~~~~No~Iw~s

SlN3WntllSNI N33 N03-IW3H3 NOddlN N03-IW3H3 NOddlN

IVN ~VN

atl~inw

a(IM1flW

NVWa003

4'

tl01AVl

1

9s11Sj'Pj'Ej

Z88'1tl8

631~3'93 83'S3't3

ZYPI

ad1

aNv

5-

w

fl3d AlddnS U3MOd

~/3330SZNOdl130ZZ011NISltCJH

C3

1

~-

-

z

I

1

.-

-

- - -

-

.

P

-

P

.-

Z

I

- - - - -

--

-

2

Z

-

b

-

1

Z

1

Z

--

-

.

r

C

-

.-

1

.

-

(33d~

.

I

--

(E X OZ) 33LmSllNV VwOOS 3SM

(N011~3U33dS

-

OZ)

(F

(S x 01) 33tln~ll~~

(~VINOZI~OH) 31H 03d U3010H3Snj

--

13

13 0M

833 a33 A001 JnZZ'O 80113VdV3

SWl

1338

zu'itl

Ttl

-

Zj'lj

Ztlv18

F8

9j'Sj

E

z33d

~33tl

23'13

1x1

dd

v

--

3 1111

,-,,a

.

-

xz

%Z

830V3H 1HE)IWlS AVM

-

JOOUd3NVHS

SS

3N01

OZ

3NO1 91 X EH 833vdS-1

31~ 83d 83(110~

IZ

=

SEO-OZS)

ASSV

318V3 AlddflS 83MOd

--

-

--

-

33mSllNV

--

VL

AS~

VI

V1

83ljl1338 33018

a~

~91

~~OOLI

AOt

POLt 80113VdV3

MOI

jn~t.0 tlo~wdv3

-

=

8t0-02s)

- - - - --

83d AlddnS 83MOd

0,H3

-.

11

tlois~s~a

tlOLP tlOlSIS3d

-

CW

X

EW

LIP IOlSIS311

W

I

(IOlSIS38

VUJOSZ

VI

-

t~o~wnwt~

AS

L

801wn33tl

80113dv3

83YlNOjSNV?jl

N33

.

-

--

ND="=~.

@so

-

83HSVM

--

M383S

IS~J

831114

3SnJ IS~J

.-

--

S

--

-

I

1 1

1

I I

31s

31Va

-

QY3

,

WYZZ

-

.

-

PP6ZCZH3

n143

dOLb83

MSH3

SMCj

IOZEj

J186SZH3

OOSj3

lfPCZH3

L1t43

WI(I3

OOOPWdV

va-P

10-ozs

VWOSZA3

dWVIJ3

ZEtEZIiI

SI~LN

SLBUU-

8V1a3

91/00it33

OP/OLC~~

OO~/LP.~I

001/12'33

t0l9HdV FZOOZSY1

--

.

-

.

-

--

-

--

SSI

6

02

LZ

9

z

SZ

tZ

FZ

ZZ

1

Z

02 61 81 LI 91

s

I

tl F

I

ZL

I1

OI

6 8

L 9

6

t

F

Z

I

.

Mmltl

ON

l~d t13~fll~vjn~~

I

M3Mtll3VAnNVW

Jltl

dW03

Al.0

NOlldItl3S30

ON 1301s

W311

-

--

.-

ISS

.-

.

-

DATE

AutoCAD

DRN

DATE

APP

TITLE

MIXER MONITOR

INFANT

FLOW

PCB ASSY/CD

DRIVER Mk2

-

..

.

,

-

.

ECN

CH'D

SIG

€AD

20-05-94

ref

CH'D

APP

672007B(

R4.S

I/P#.

STOCK No DlSCRlPTlON

QTY

COUP

REF MANUFACTURER

1

MANUFACTURER PART

No

REMAR

M672007

---

MIXER MONITOR PCB

-

--

.

...

EPIKW/OS POT 1K PC MOUNTING W/O SIiAFl

EH~PINR/A

--

-

.

---

-.

-

...

-

--

-

.

-

.

-

.

-

-- - - -

.

--

-

-.

.

---

,-

-

-.

- . - - -

...

3 WAY BASE POST R/ANGLE

--

-

....

-.

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

. - .

-

---

.....

.

-

.........

..........-..........

....

-

--

.-

-

-.

.

- . -

--

.- .

-

. - .

-

... ...

--

-

......

-.

..

--

.-

....

-

....

-

.....

.

-

.-

\

..

-

-.

----

-

--

-

--

-

--

..

.

..

...

.-

0.1

--

-

---

-

IN

-

.

-

1

.

-.

--

.

-

1

.

-

..

-

...

-

1

-

.

-.

-

.-

-

..-

-

.

-

...

-.

..

.

-

.

-

,-

.

--

...

-

..

-. -.

.

-

MEGGIll

TAKBRO

-

ELECTRONICSI

!

-

MEC

ClTEC TYPE

!

51

1K

LINEAR

.-

TS3P-SHF-IAA

!

-.

.

-.

--

!

--

.-

-.

-

.-

....

-

..

-.

-

-.

--

- --

--

I

-.

.-

--

-.

-

-.

P

-

.

.-

---

.

--

---------dm

I

1.

I

.

.........

- . -

-

.

..

-

--

-.

.

-,

.

-.

-

.

-

-.

.........

.-

'

ISS

-

INFANT

now

DRIVER

PCB

,

MK

ASSY

,.

-

2

,

DCY-

-

plCoMEDI

.r

PARTS

-

TAKERO JST VI-IR-- 5EI

5

WAY t1OUSING

EH5H

16/0.2 WIRE

/r

TAKBRO JST VHR-5N

5 WAY HOUSING EH5H

TAKERO JST BV1-l-211-1.1 CRIMP CONTACT x 5 EH5HCC

-.

-

.

--

...

-

TAKERO JST BVH-2 1T- 1.1

TIE WRAPS TO SUIT

-

T"LE

INTERCONNECTION BElWEEN POWER

DRN EAD

...

-.

SUPPLY PCB AND PROCESSOR INFANT

FLOW

DRIVER

Mk2

PCB

1

TRICOMED

DATE 02-08-94

1

DRG

t

CRIMP CONTACT x 5 EH5HCC

I

:ti:

No

672-032-DA

ih;

f

1

Document No.

M672SM.

Version

1.10.

Issued

8th

November

1994

Page

35

of

85

Document

No.

M672SM.

Version

1.10.

Issued

8th

November

1994

Page

36

of

85

Section

9

Electronic Calibration Procedure

Before calibrating the electronic section of the Infant FlowTM Driver the power supply voltages should be checked. The reference and excitation voltages should be checked next and only then should the manometer and Oxygen monitor sections be calibrated.

The equip-t required for this is a good

qualityI for checking the power supply rails, reference and excitation voltages and a 0 to water and pressure relief valve.

column

or similar accurate low pressure measuring device for calibrating the manometer

We

do not recommend the use of mechanical pressure gauges for this purpose as they are inherently inaccurate. A hand pump bulb Pressure Sphygmomanometers is also required. supply of

bar pressure Medical

Air

and Oxygen are required.

4

To gain access to the electronics it is necessary to remove the top cover Howm Driver. This is achieved by removing the top..-two

calib~~-DVM-~~bleofre~01Jrin@-mY

150

Crns

H20

siiar to those used on Blood

To

check and calibrate the Oxygen monitor a

fiom .the Infant

M3

raised countersunk crews on each side of the cover and then sliding the cover upwards and off The adjustment trimmers are accessible at the top

left of the electronics module. They

$nay

be adjusted from the side by

using a standard trim tool.

M3

To remove the manometer section completely it is advisable to remove the four countersunk screws on the

left hand side of the device and the four

M3

x

8mrn

raised

pan head

screws on the back panel. This will enable the complete assembly to be slid forward so that the

connectors can be removed fiom the bottom of the processor board to

allow the assembly to

be come out of the housing.

CAUTION

Disconnect the unit from the mains supply by unplugging the mains cable

from the mains

input module on the rear panel before attempting to remove the electronics module.

Power supply

To check the power rails it is advisable to first disconnect the power connector

checks

CON2

fiom the processor board. Ensure that the mains supply is connected to the mains input module and that the voltage selector is set to the correct value. Switch on the power to the unit. The voltage rails to be checked

Document

No.

M672SM,

are.;

Page

37

of

Version

.

1.10,

Issued

8th

November

- . --

1994

-.

~.

...

85

The + 5

The

+I5

The

-1

5

VDC

supply on pin 1 of CON2 with respect to

VDC

supply on pin 3 of CON2 with respect to

VDC supply on pin 5 of CON2 with respect to

0 V

(Digital ground) on pin

0

V

(Analogue ground) on

OV

(Analogue ground) on

2.

4.

Ifthese are may be reconnected to the processor board and the next set of tests

all

present,

within

5%

of their nominal value and stable the power connector CON2

carried

out.

Display brigbtness set up

First the display brightness must be set. This is done by adjusting brightness is obtained for the seven segment displays and then adjusting graph

LED'S are of similar brightness. The light dependant resistor,

VR2

VR1

LDR1,

until the required

occluded to ensure that auto dimming is satisfactory.

Reference voltage checks

The reference voltage may now be checked. Connect the negative input ground test point,

TP3,

and the positive input to

TP10.

A

reading of

200

of

mV

the

be indicated. The excitation voltage to the pressure transducer is checked on reference to ground, this should be 12

V

*

0.6

V.

until the bar

may be partially

h

ICS

DVM

10

to the

mV should

pin 6 with

Manometer calibration

With no equipment connected to the pressure input set the manometer to zero with

VR7.

Connect the water column with the hand pump bulb into a "T" piece and into the manometer pressure input on the front panel. Inflate to

10

Check that the manometer reads

Cms H20, if not, adjust Release the pressure and check that the zero reading has not changed. procedure until the readings are correct at both pressures. Pump the system up to and ensure that the displayed value is

5

Cm

10

Cms H20 and observe that there are no leaks.

VR3

to give the correct reading.

If

it has, repeat the

5

Cms Hz0

H20.

Once calibration is satisfactory pressurise the system to above 12 Cms H20 and ensure that all segments of the manometer bar graph illuminate, the alarm sounds and the over-pressure relief solenoid is activated. Press the

high

pressure

LED

is on, that the audible

"MUTE"

button and

ensure that the audible alarm is silenced. Release the pressure in the system and press the

"MUTE"

button, the audible and visual alarms should cancel and the over pressure solenoid

should de-activate.

Document

No.

M672SM,

Version 1.10,

Issued

8th

November 1994

Page

38

of

85

Oxygen analyser calibration

There are two stages to the calibration of the Oxygen analyser, fist- the calibration of the galvanic

automatic

To calibrate the integral Oxygen analyser the electronic module must be installed in the lower case with the leads connected to the mixer section of the driver. The Infant also be connected to a source of Medical

that a reference Oxygen analyser with an accuracy of

venfy the performance.

to

Set the flow to reference analyser is reading 100% Oxygen. Adjust display window. Set the mixer control to an reads 21% Oxygen. Adjust no hrther adjustments are necessary.

he1 cell itself and secondly the calibration of the mixer monitor which enables

alarm

setting on the set value.

FlowTM driver must

Air

and Oxygen at 4 bar pressure. We recommend

*

1% is fitted

8

lpm and turn the mixer control to indicate an FI02 of 1.0 and ensure that the

VR4

until 100% is displayed in the Oxygen

FI02 of

VR8

until the oxygen display reads 21%. Repeat the process until

.21

and ensure that the reference analyser

in

the outlet of the driver

m

b

-

To calibrate the mixer monitor board ensure that the three way connector from the mixer control is connected to the processor board. Turn of the electronic module then press and hold

will

the mute button whilst turning the power on again. The Oxygen display

an

setting of the mixer control. Set the mixer to of

30%.

Set the mixer control to an FI02 of 1.0 and adjust the process until no reads 60 elapsed.

Once all of these procedures have been completed the Infant FlowTM Driver may be reassembled.

h

2

digits. The Driver will return to normal operation after a period of 2 minutes has

hrther adjustment is required. Check that at an FI02 of .60 the display

FI02 of .30 and adjust

VR5

until 100% is shown. Repeat

VR6

now show the

to give a display

f-

I

Document No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

39

of

85

Section

10

Mechanical Description

The mechanical components of the Infant FlowTM Driver can be separated into three items:

The enclosure

The

Aidoxygen Mixer

-

~

.

-

.-

..

The Flowmeter/Pressure relief valve assembly

fiom

2mrn

The enclosure is manufactured epoxy based paint which is very resilient to knocks and substances that may come into contact with it.

sheet Aluminium and is protected by a powder coat

in

The Manometer section is held

the

left hand side of the enclosure and four

the case by means

M3

washers on the back panel. The Mixer assembly is located by the two

in

the pole mount bracket

place. The rear panel is locked

x

of

four

8rnm

M3

raised countersunk screws on

pan head screws with shakeproof

UNC

in

by the gas inlet mounting plate on

screws that hold

the rear of the Mixer.

The flowrneter mounting block fitted to the left hand side of the mixer routes all output gas from the mixer to the Oxygen analyser and either the patient circuit or to atmosphere through the over pressure relief valve system. the seal is made with

an

"0"

ring between two flat machined faces. This entire assembly may

It

is mounted on the mixer by two

8-32

UNC screws and

be removed for cleaning or repair by removal of these two screws.

The flowmeter is removed by loosening the

M4

grub

screw located on the left side of the assembly. Once loosened the flowmeter can be pulled forward and the tubing on the rear detached by pushing the blue ring in towards the flowmeter whilst pulling on the tubing. removed, it is advisable to replace the

"0"

rings prior to re-assembly.

If

The flowmeter should be cleaned if contaminated and the calibration should be checked periodically (annually from the block and disconnect the tubing by pushing the blue ring

if

the supply gases are clean and dry). To clean the flowmeter, remove it

in

towards the flowrneter whilst pulling on the tubing.. Remove the nut on the top which allows the ball to be removed. Clean the tube with damage the acrylic.

warm

.-

soapy water only, do not use spirit based cleaners as this will

Document

No.

M672SM,

Version 1.10,

Issued

8th

November 1994

Page

40 of

85

Flowmeter Calibration Check

To check the flowmeter calibration attach the Infant Flowm driver to the medical Oxygen supplies and set an Infant indicated flow of

Flowm driver to a test flowmeter or flow test device with an appropriate hose. Select an

5

lpm on the Infant Flowm driver flowmeter and vem that the correct flow

is indicated on the test device within

FIO2 of .5 on the mixer control knob. Connect the outlet of the

*

10%. Repeat at

8,

10, 12 and 15 lpm.

air

and

Safety Pressure Relief Valve Setting

--

-back pressure-of &-I=

For the Infant HowTM Nasal

CPAP

I-O-tiesthm

Tr&@Ed-CPAP

generator to function correctly it is necessary to have a

press- iTthe-delivery circuit prior to

the generator. For safety reasons the Infant Flowm driver is equipped with two pressure relief

systems The first is a mechanical safety pressure relief valve designed to protect the equipment and delivery circuit. This is mounted on the flowmeter mounting block and is not accessible to

the users. It is factory preset at 150 Cms H20 but should be checked periodically.

/

To test the setting and efficacy of the safety pressure relief valve connect the calibrated water

8

column or similar pressure measuring system into the patient circuit. Set a flow of

in

flowmeter and occlude the delivery tube. The pressure Cms H20

of 150 Cms

*

20 Cms H20.

If

necessary, adjust the safety pressure relief valve to give a reading

Hz0 on the water column.

the patient circuit should reach 150

lpm on the

The second safety relief valve is to protect the patient and consists of an electronic solenoid valve which operates when the measured pressure in the patient circuit exceeds 11 Cms

H20.

This device is mounted on a bracket on top of the air1Oxygen mixer. Gas fiom the mixer is

passed through a fixed regulator and the solenoid valve and acts on a silicone diaphragm located under a plate at the rear of the flowrneter mounting block. When an over pressure is

detected the solenoid is activated and the pressure removed

from the diaphragm. This allows

the gas in the patient circuit to vent to ambient through the rear of the block and reduces the

pressure in the patient circuit to virtually zero instantaneously.

It is necessary to check the pressure setting of the electronic safety system periodically. This is achieved by disconnecting the tube

an

connecting to should be set for between 160

accurate pressure measuring device such as a mercury column. The regulator

&

tube on the solenoid and check the

from the pressure regulator to the solenoid valve and

180

mrn

Hg (2.5 to 3.0

PSI).

Once tested and set replace the

hnction of the electronic over pressure vent valve.

Oxygen Sensor

The sensor for the Oxygen monitor is a Teledyne R22 electro-chemical galvanic he1 cell. It is

mounted on top of the flowrneter mounting block directly behind the flowmeter. It is supplied with mixed gas

fiom the mixer through a device which limits the pressure variations which could otherwise affect it's accuracy. The sensor is expected to have an average life in excess of one year. The end of life indication for this sensor is when it is no longer possible to calibrate it accurately, however, it

MR22.

i.s recommended that it is replaced

!,,

annually.

Re-order part number

n

-,I

~

Document No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

4

1

of

85

Document

No. M672SM

Version 1.10,

Issued

8th

November 1994

Page

42

of

85

Document No.

M672SM.

Version 1.10,

Issued

8th

November 1994

Page

43

of

85

n--mpnt

Nn

Mfi77SM

Venion

1.10.

Issued

8th

November

1994

Page

44

of

85

U6

SMC

AIR

flLTER

-

w200

W

r

12

CSK

-

U5

r

52

LON(

PHIUPS

PAN

t

llEMS SHOWN OF CUSIOMER

AS

ORDER

WPE

z

w

opp m _momq

SIC

DATE

ECN

I

ctro

I

APP

llllI

02/AlR

ASSEMBLY

ITEMS SHOWN OF

cunom

MOUNTING

FOR

AS

WPL~

ORDER

In>

I

BLOLK

TRICOMF

u

1

ORN

MTE

ORC

EAD

07-07-93

No

67

1

-0

I

CH'O

1

APP

1

PI

6-!

Section

11

.

~

-.

~.

,

-

.:~

AirIOxygen

The main body of the Aidoxygen Mixer is a derivative of the Sechrist model has been designed for both durability and serviceability. met and the supplies are satisfactorily clean and dry, the mixer

Mixer

If

3500.

This mixer

the criteria for the gas supplies are

will

provide years of reliable use

with relatively little care and service.

--

-

.

..

.

This section of the Infant FlowTM Driver service manual is dedicated -entirely to the mixer and is designed to take the technician through a step by step process to:

Test for proper operation Troubleshoot malhnctions Calibrate the mixer

if

necessary

Disassemble and reassemble the mixer

\

,

L

.

'

L

2

.

>

-b

a

Keep the mixer working at its optimum efficiency of design

This section of the

A

Describes all tools

manual

and

is

split into four parts:

test equipment required to calibrate and service the airloxygen

mixer.

B

Details the testing procedures necessary to determine optimum working conditions of the

air/Oxygen mixer.

troubleshooting guide is given in part

If

service

is

necessary, based on the outcome of the testing, a

B

to determine which component module of the

mixer is involved and what procedures are recommended.

Details the calibration procedures and those necessary for service.

C

and

D Details the dis-assembly

re-assembly procedures.

\

-

Document No. M672SM, Version 1.10, Issued

8th

November 1994

Page 46 of

85

Description of the airloxygen mixer

The airloxygen mixer is made up of three separate but integrated modules:

The proportioning module does the actual gas mixing and proportions the outflow.

The pressure balancing module takes the incoming differential of

2

Bar

(30

PSI) and reduces this differential to 3 Cms H20 thereby nullifjing

gas

pressures, with a potential

the differences and equalising the incoming pressures.

--

-

TKe

Alarm

more than

will

be delivered by the mixer until supply gas pressures are restored.

Sidule soudK a cont'iuous~

2

Bar

(30

PSI). When the

alarm

is activated the gas with the highest pressure

if

the incoming gas pressures differ by

---

Understanding the AirIOxygen Mixer

The Infant Flowm Driver AirIOxygen Mixer is a device to proportion Medical at operator selected ratios for delivery to patients via the Infant

Floww NCPAP generator.

To accomplish this task properly, several factors must be considered. First, the device must pennit the operator to select a ratio of the flow of one gas vs. the other gas. This is typically done by using two variable restrictors, such as needle valves, which are linked together in such a way that the effective flow areas of the two variable restrictors are inversely proportional. These variable restrictors are positioned with a calibrated control knob. Movement of the control knob will increase the effective area for the flow of one gas while decreasing the effective area for the flow of the other gas. The ratio of the areas will determine the ratio of the two gas flows. If the two gases are air and oxygen, the percentage of oxygen in the mixed gas is determined by the formula

Air

and Oxygen

mc

'1

Q0xygen Q~ir

Where Q0xygen

Dimensioning for the effective areas is determined by the desired flow range of the device.

is

the flow of oxygen and QAir is the flow of air in identical units.

A

cross section schematic view of the proportioning valve module of the Infant Flowm Driver Mixer is shown overleaf. The calibrated control knob is attached to a threaded positioning shaft. Positioned within two sharp edged orifice seats is a double ended tapered needle valve.

A

spring loaded positioning device acts upon the end of the double ended valve keeping it in

contact with the

Document

No.

thread+ positioning shaft.

M672SM.

Version

1.10,

Issued

8th

November

1994

Page

47

of

85

Rotation of the control knob

adjusting the location of the double ended needle valve relative to the two

will

move the location of the threaded positioning shaft thereby

ofice seats and

defining the effective flow areas for both gases.

This simple system would be all that is necessary to proportion the flow of to gases. However,

if

it is desired to calibrate the control knob and to maintain the ratio of the two gas flows at a constant value, the pressure differential across both easily imagine what could happen to the gas flow ratio

orSce areas must be identical. One can

if

the Oxygen pressure increased fiom

4

bar, when the ratio was selected, to 7 bar. Some type of system must be used to regulate the gas pressure entering the proportioning device preferably making both gas pressures equal.

If

the individual gas pressures entering the proportioning device are equal and the gases flow to a

will

common outlet for mixing, the pressure differential across each of the orifice areas

If

equal.

these conditions are maintained, the ratio of the two gas flows

-

--

-

will

remain constant.

be

Various methods are used by different manufacturers to equalise the two gas supply pressures. Precision regulators set to equal outlet pressures, dual regulators configured such that one gas pressure is slaved to the other and devices termed nulling regulators. Nulling regulators were

conceived

use one

gas

regulator

the 1930's for welding and liquid mixing purposes.

pressure to control the other, but either gas may be the controlling gas. A nulling

will

reduce whichever gas pressure is higher to a value equal to the lower gas

In

principle, nulling regulators

in

pressure.

The Infant

Flowm Driver AirIOxygen Mixer uses a nulling regulator to balance the two supply gas pressures before they enter the proportioning valve. This is shown schematically overleaf. Two identical needle

valve/seat arrangements are coniigured on opposite sides of a central diaphragm. They are located so that both valve seats cannot be closed at the same time and they are designed so that the effective flow area for each gas is inversely proportional to the other. When one gas source is turned on, that gas pressure will act on the diaphragm pushing it away

from the needle valvelseat until the valve closes and permits no flow of the gas. other gas source is turned on, it will find its needle passing through this open seat will act upon the diaphragm. The diaphragm

valvelseat open and the gas pressure

will

then move to a

If

the

position where the pressure acting upon each side of the diaphragm will move away from the higher pressure. When the diaphragm moves in this way, the the higher gas pressure will close down, reducing pressure on the diaphragm. the opposite needle

valvelseat is opened. Thus, the system will null out differences in the gas

needlelseat which is the source of

At

the same time,

pressures until they are equal. These equal gas pressures are then presented to the proportioning valve for mixing at the desired ratio.

As

stated previously, a characteristic of a nulling regulator is to create equal to the lower of the two inlet gas pressures. zero, the outlet pressure will be zero. It is

In

this case,

desirable to keep pneumatic respiratory care

if

an

outlet gas pressure

one of the inlet pressures is

equipment operating even with the inadvertent loss of one of the supply gases. Therefore a device is required which will bypass the nulling regulator with the remaining supply gas and simultaneously activate an incorporated

in

the Infai.lt FlowTM Driver AirlOxygen Mixer.

alarm to alert attending personnel. Such a bypasslalarm system is

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

48

of

85

Schematic representation

1'

of

the AirIOrygen

Mixer

Document

No.

M672SM,

-

Version

1.10,

-8th

November

1994

. ..

. . .

Page

49-of

85

This device is depicted schematically on the previous page. The supply pressure of

air

and

oxygen are delivered to this module via internally drilled channels. Cross drilling within the

air

module presents the

and oxygen pressures on opposiig ends of two identical moveable

pistons. These pistons are fitted with sealing O-rings and are nominally seated with the force of

a compression spring.

on

The sealing O-rings are of different diameter generated by the inlet gas pressures are close to the same value. pressures should drop

in

relation to the other, the resulting forces

back from its seated position and in so doing open a flow channel

the ends of the piston. Therefore the forces

If,

however, one of the gas

will

cause the piston to move

from the higher of the two inlet pressures to the Proportioning Module outlet. When this occurs, the alarm reed will be activated and the higher gas pressure will enter the outlet manifold of the proportioning valve to supply gas pressure to the outlet port, bypassing its normal route.

will

Restoring the lower gas pressure

in

located

the bypass/alarm to prevent the normal gas mixture

The pressure difference in the inlet gas pressures required to activate the

re-seat the moved piston. A one way check valve is

fiom

activating the

alarm

reed.

is determined

by the dimensioning of the piston seal areas and the seating spring force.

Filters are incorporated in both of the gas inlet connections. One way check valves are also located in both of the gas inlet connections to prevent the cross flow of one gas supply to the

other source.

Document No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

50

of

85

Tools and Accessories Required for Calibration and DisassemblyIRe-assembly

Special tools and accessories are required to calibrate, disassemble and. reassemble the Infant

Flow Driver

these special tools are available.

Aidoxygen Mixer. No service work on the mixer should

be

undertaken unless

SPECIAL CALIBRATION

Air/Oxygen Mixer Tool Kit

_lL8!Ispanner-~ench-.

3/8" spanner wrench

5/8" spanner wrench Bypass plate Brass Plug 10-32

x

Brass 10-32 Roll Pins Screws (2) 6-32 O-rings

-

1/16" fitting

(8)

008

AND

. .

--

ASSEMBLY TOOLS

Part No. S365

--

>art-NorS36-54

Part No. S3653 Part No. S3652 Part No. S3655 Part No. S3635 Part No. S3 Part No. S3537 Part No. S3559 Part No. S3534

1

10

--

-

--

Figure

Document No.

1.

Special Assembly

.I.

M672SM.

Version 1.10.

Tools

Issued

8th

November 1994

Figure

2.

Calliper & Micrometer

Page

5

1 of

85

GENERAL

CALIBRATION

AND

ASSEMBLY

TOOLS

1/16" Allen Wrench 5/64" Allen Wrench 7/64" Allen Wrench 9/64" Allen Wrench 3/16"

Men Wrench

114" Allen Wrench 3/32" Allen Wrench

7/16" Open End Wrench

112" Open End Wrench

314" Open End Wrench

114" Nut Driver

Internal

Tru-arc

Needle Nose Pliers

Soft

Mallet Medium Blade Screwdriver Precision Calliper Precision Depth Micrometer LubricantforfOGiigs

--

EQUIPMENT

(see figure 2) (see figure

---

-Kiytox

240 AC- (Dupont)

REQUIRED

2)

FOR

Oxygen High Pressure Hose with Appropriate Fittings Air High Pressure Hose with Appropriate Oxygen Regulator, Adjustable with Pressure Gauge

Air

Regulator, Adjustable

Oxygen Analyser (Calibrated to

with

Pressure Gauge 0-4 Bar (60 PSI)

+

-

Fittings

0-4

1% Accuracy, Readout Accurate to 1% Increments) Sampling Reservoir (Bottle or Tube) Oxygen Analyser (Calibrated To

+

-

1% Accuracy, Readout Accurate To

Sampling Reservoir (Bottle Or Tube)

Pressure Gauge

0-4

Bar (60

PSI)

Circlip Pliers

-

TEST SYSTEM

Bar

(60

PSI)

-.

1%

Increments)

ROUTINE

MAINTENANCE

REQUIREMENT

Before attempting to calibrate or repair the AirIOxygen Mixer, a qualified hospital technician

should be familiar with the design and hnction of the device. The following instructions utilise

All

a numbering system which is to be followed in sequence.

parts are numbered and can be

reviewed on the exploded parts diagrams contained herein.

Aidoxygen

Mixer Overhaul

Kit

(Part

No.

S3658)

To ease the task of servicing the airloxygen mixer the overhaul kit includes all of the items required to

Document No.

carry

out a full service under one part number. The kit includes the following:

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

52

of

85

MIXER

Part Number Description

Items for the Proportioning Module

OVERHAUL

KIT

S3658

S3548 S35

13

1

S3521

1

S3534

I~3520-

1

S3535 S3533

S3521

S3517

1

S3566

1

S3626

1

S3520

1

S3515

I

S3510

[

S3525

Nitrile 0-Ring, BS 006

Nitrile 0-Ring, BS 0 1 1

I

Nitrile 0-Rmg, BS 012 12

I

Nitrile 0-Ring, BS 008

-J_blitrile~&ing~~-01.4

_

I

Paclang Washer, Nylon

I

Adjustment

Items for the Pressure Balancing Module

Nitrile 0-Rmg, BS 012 Nitrile

I

Nitrile 0-Ring, BS 01

I

Nitrile 0-Ring, BS 112 12

]

Nitrile 0-Ring, BS 014 12

]

Spring, SS, LC-014B-4SS

I

Diaphragm Assembly

I

Duck Bill Check Valve 12

-

Shaft 11

0-RUE.

BS 007

--

8

1

5

14

--

-I--.

11

4 2

12

I

12 11

I

1

S3639

1

S3548

1

S3618

1

~3569

1

S3520

1

S3619

1

S3637

1

33636

(

S3529E

I

S3522K

I

1

S3578

Items for the AlarmlBypass Module

(

Silicone 0-Ring, BS 008,70 DUR 13

I

Nitrile 0-Ring, BS 006 12

I

Silicone 0-Ring, BS 010,50 DUR 12

I

Nitrile 0-Ring, BS 025 11

I

Nitrile 0-Ring, BS 014 14

I

Spring, 302 SS 12

I

Spring,

I

Check ball, 7/32" Diameter

I

Water Trap filter

]

Air

1

Nitrile

Custom

Items for the Filtration System

and

Oxygen Inlet Filter

.-Items for Flowmeter Block

.

0-Iting,

BS 0

13

Kits

11 11

1

12

11

I

Document No.

M672SM,

-

Version

-

.

1.10,

Issued

.

8th

November 1994

~

Page

53

of

.

-

.

..

85

B.

TEST

PROCEDURE

In order to determine the optimal hnction of the Aidoxygen Mixer and- the potential need for calibration, service or repair, complete the following test procedures.

1.0

B.

1.1.

Initial Test

Connect the Mixer to clean and

Air

supplies which are independently adjustable fiom 0 to 4 Bar (0 to

System

Set

Up

dry

Medical Breathing Oxygen and Medical Breathing

60

PSI).

--

B .1.2 Conhect

B.

1.3

Direct the flow fiom the flowmeter to a sampling reservoir (i.e. bottle or tube), making

sure that no room

B.

1.4

NOTE:

B.

1.5

B.2.0

B.2.1

Insert the Oxygen analyser probe into the sampling reservoir.

The Oxygen analyser must be calibrated and accurate to

Set a flowrate of 7 lpm

Proportioning Module.

Set the Oxygen and air pressure to

K-fkiGiG%er

tothioutletof the Mixer.

air

is being entrained to dilute the

4

Bar

(60 PSI)

--

mixture.

*

1%.

-

B.2.2

B.2.3

Compare the Oxygen analyser readings to the Mixer settings of

The Mixer has a specified accuracy of between the Mixer and Oxygen analyser reading, calibration or service may be necessary (see Troubleshooting Guide).

B.2.4

There is a constant bleed of mixed gas from the bottom of the Proportioning Module. This bleed is approximately low flows. These bleed rates are predetermined by the factory and cannot be reset the field.

Document No.

M672SM,

Version

1.10,

3.5

Issued

*

3%.

lpm and is needed to

8th

November

1994

.21,

.40, .80 and

If

the FI02 varies more than

maintain

accurate FI02's at very

Page

54

of

85

1.0.

*

4%

in

B.3.0

Pressure Balancing Module.

B.3.1

With same test system set up

as

above, select an

FI02

of

.60

and observe the Oxygen

analyser reading.

B.3.2

Vary the inlet pressures to the Mixer to

air

and then to

more than

4

1%

Bar (60

fiom the

PSI) Oxygen and

initial

Oxygen analyser reading, calibration or service may be

2.6 Bar (40

PSI) Oxygen and

PSI)

air.

If

the

4 Bar (60

FI02

varies by

PSI)

necessary (see Troubleshooting Guide).

B.4.0

pppp-

B.4.1

Alarm Module.

-

--

Set air and Oxygen supplies to

4 Bar (60

.

PSI), the alarm should be silent.

-...

?!

B.4.2

Slowly reduce the

(24

and

28

PSI) and the Oxygen analyser should read

supply pressure slowly to

(40 PSI).

air

inlet supply, the

4 Bar (60

alarm

should sound at between

100%.

PSI),

the alarm should reset at or before

Increase the

1.6

and

1.9

Bar

air

inlet

2.7 Bar

B.4.3

B.4.4

B.5.0

B.5.1

B.5.2

B.5.3

Repeat step

Oxygen analyser reading should read

If

the alarm does not function as per the above specifications, calibration or service

4.2

varying the Oxygen inlet supply pressure, when the

21%.

alarm

sounds the

may be necessary (see Troubleshooting Guide).

Air

Inlet Filtration System (most frequent service required).

To test the pressure drop through the waterltrap filter or the internal air inlet filter, test port has been provided on the rear of the

With a

111 6"

Connect a high pressure gauge

114"

fitting

nut driver, remove the plug from test port and install a Brass 10-32

(Part

No.

S3

10, see Tool Kit).

(0

to 4 Bar or 0 to

Mixer

above the air inlet.

60

PSI) to the

10-32

fitting.

a

x

B.5.4

With the flow set at 7 lpm set the mixer control knob to

indicated at test port.

Document No.

M672SM,

........

Version

1.10,

Issued

8th

November

1994

.21.

Observe the pressure

Page

55

of

.....

.

-

85

,

.

B.5.5

If

the difference between the pressure at the test port and the inlet pressure is greater

than 0.65

Bar

(10

PSI)

replace either or both

air

inlet flters (see Routine Maintenance

section).

NOTE:

The Mixer

maintain the delivered FI02 within

fluctuations of the supply pressures. The additional

*

1%

of the selected value with

2%

error is caused by the

will

readability of the set point and scale error.

NOTE:

The outlet pressure of the Mixer

two inlet pressures.

PROBLEM

FI02 not accurate

will

TROUBLE

POSSIBLE

always

SHOOTING GUIDE

CAUSE

be

Oxygen analyser out of calibration (most common problem)

Improper purity of supply gases Wrong gas supplied to inlet

slightly lower than the lower of the

CORRECTION

Re-calibrate Oxygen analyser

Check quality of supply gases

Assure outlets and hoses are correct

Front or rear seats

worn

Calibration of proportioning

Clean and replace seats

See Calibration Section

valve incorrect

Pressure Balancing Module malfbnctioning

&lob is herd to turn

?.

.

d

Document No.

M672SM,

Version

Knob has been bumped bending adjustable

1.10,

Issued

8th

shaft

November

1994

See Calibration for Pressure

Balancing Module

Replace adjustable

shaft and

re-calibrate

Page

56

of

85

PRESSURE

BALANCING

MODULE

PROBLEM

FI02 Change testing

.

--

>

1%

when

POSSIBLE CAUSE

Air

or Oxygen inlet filter

causing

>

1.3

Bar

(20

PSI)

difference

Regulator needle(s) out of calibration

3-1s)

on reguiator seat

damaged causing leak

Contamination

from supply

gases

ALARM

MODULE

di

--

CORRECTION

Replace filter

Calibrate

ReplaC~rings and

re-calibrate Clean and re-calibrate

-

--

PROBLEM

Continuous alarm with both inlet pressures equal

Alarm not sounding with loss of one pressure

POSSIBLE CAUSE

Dirty inlet

filter(s)

Bypass check ball leaking

Alarm Module adjustments out of calibration

Defective Reed

Alann Module adjustments out of calibration

Alarm

poppets stuck

CORRECTION

Dirty

inlet filter(s)

Need to clean check ball and

seat (see Disassembly of

Alarm

Module)

See Calibration Section

Replace reed

See Calibration Section

Clean, lubricate and

re-calibrate

Document No.

M672SM,

--

.

-

Version 1.10,

.

. .

..

.. .

Issued

.

8th

November 1994

Page

57

of

-

----

85

AirJOxygen Mixer Calibration

The AirIOxygen Mixer must be calibrated and tested in conditions similar to the environment for which the Mixer was designed.

Medical breathing Oxygen and medical breathing

system. and that the accuracy of the readout is

A

calibrated Oxygen analyser is necessary (be sure the Oxygen analyser is calibrated

in

1%

air

sources

will

increments or better) and a flowmeter is used to

sample the gas mixture being delivered to the Oxygen analyser.

To calibrate the

--

Aidoxygen Mixer, the system must be broken down into the three modules:

--

the ~ro~ortioz~ Module, the Pressure BalariC'iE-Module and--the Disassembly and Re-assemble Section).

NOTE

The order of calibration given must be followed must be calibrated before the Proportioning Module can be connected and calibrated and the Pressure Balancing Module and Proportioning Module must be calibrated

together before the

Alarm

Module can be installed

i.e.

the Pressure Balancing Module

and

calibrated.

be required to calibrate the

Alsm

Module (see

C.

1.0

I.

Pressure

I

To calibrate the Pressure Balancing Module, all accessory parts, pole mount, wall mount, flowmeter and Proportioning

C.

1.2

Using

block, Part No. sections. The diaphragm assembly,

Document No.

Balancing

a

3/16"

M672SM,

Module

(See Figure 3)

and

Alarm

Allen wrench, remove the four screws,

air

..

.

Version

S3505, and

block,

Part

1.10,

Issued

divide

No.

S3505, the Oxygen block,

No. S3 5 10.

8th

November

the Pressure Balancing Module into three

1994

Modules must be removed.

Part

No. S3507, from the air

Part

No. S3506, and the

Page

58

of

85

Document No.

M672SM.

'

Figure

.

).

'

Version

1.10,

4.

Pressure

Issued

8th

November

Balancing

1994

Module

Page

59

of

85

--

Figure

- - -

-

4.

--

Three Sections of the Pressure Balancing Module

--

NOTE: The

C.1.3

Using

assembly distance should be between

Air

and Oxygen blocks are identical for calibration purposes.

a

precision calliper (see Tool List) measure the thickness of the diaphragm

(

the distance between the 2 diaphragm support plates) (see figure

0.800"

and

0.810".

Regulator Needle Setting Table

Diaphragm Thickness

.810 ,809 .808 ,807

,805 .804 .803 ,802 .80

.800

799 ,798 .797 .796 .795 .794 ,793 ,792

.79

1

.

>

8.'

1

Micrometer Reading

.3975 .3

970

.3965

.3 960

.3945

.3

940

.3935

3930

.3925 .3920 .3915

.3910

.3

905

.3 900

3895

.3890 .3885 .3880

1

5).

The

Document

No.

M672SM.

Version

1.10.

Issued

8th

November

1994

Page

60

of

85

Figure

5.

Holding Calliper

Figure

6.

Micrometer across block

C.

1.4

C.

1.5 Set the depth micrometer (see Tool List) to the setting indicated

Locate the measured diaphragm assembly thickness in the Regulator Needle Setting Table

and

read across to hd the corresponding depth micrometer setting.

the micrometer across the block cavity (see figure 6).

C.

1.6

1.7

Using either a 111 Using the special Assembly Tool

S3516.

and begin turning clockwise (see figure

The regulator seat.

6"

or a 5/64" Allen wrench loosen the set screw,

AT1

insert into the eccentric adjuster,

6).

Part

No.

S35 12,

and

the regulator needle, Part No.

move up and down.

YOTE:

C.

1.8

Calibration must be done

As the spanner wrench is being turned (always clockwise), the needle and seat will

on

the downstroke of the regulator seat and needle.

amve at top dead centre and start back down. As it starts back down, start sliding the depth micrometer back and forth across the needle: do not bend the needle.

in

the table and rest

Part

No.

Part

S35

14,

S35

18.

No.

will

4

F

r)

,.I

C.

1.9

Slowly turning the spanner wrench noise of the depth micrometer contacting the needle as it slides over it.

Document No.

M672SM.

. .

. - -.

Version

- - -

-

-.

1.10.

.

Issued

-.~

8th

November

.

in

veq small increments, listen for the tapping

1994

...

.

Page

6

1

of

.

85

C.

1.10

C.

1.11

C. 1.12

At some point in the downstroke of the needle, the depth micrometer

in

come needle is

contact with the needle.

in

Using either

the proper position.

a

111 6" or a 5/64" Allen wrench, tighten

As

soon

as

the tapping noise ceases, the regulator

up

set screw,

Part

to secure the calibration.

and

Calibrate both blocks in this manner by replacing the diaphragm assembly screws,

Part

No. S3

507,

hand tightening

reassemble the Pressure

and

securing the two block halves

only.

Balancing

will

No.

with

no longer

S35 18,

Module the four

-NOTE:

C.1.13

C.

1.14

NOTE:

C.2.0

Position-the-twwhalves--so-that-they

are-flush-(makesue-that them0 halves of the

module face, where the Proportioning Module mounts, are flush).

Tighten the four screws Part

S3507

in a cross pattern to evenly distribute

No.

pressure.

The Pressure Balancing Module is now calibrated.

At

the end of

must be

performed

Proportioning Module (see figure

all

calibration procedures, a test of the Pressure Balancing Module

to

contirm the calibration.

23534

7)

Document No.

M672SM.

53537

.>.

;

Version

:;C,x/

.A,..

35:

1

Figure

1.

lo1

Issued

0:

i

7.

Proportioning

8th

November

.

Module

1994

.

53531

.5

3549

5

Page

3542

62

of

85

C.2.1

Using a

9/64"

Allen wrench, attach Proportioning Module to Pressure Balancing

Module with four screws Part No.

S3550.

NOTE:

C.2.2

C.2.3

C.2.4

Be sure O-rings are in place between the Proportioning Module and Pressure

Balancing

Install the faceplate, Part No.

a

new overlay, Part No. M671019, to the panel.

Install

the

--

Alarm

--

Using

figure

Module.

M671019, with two screws, Part No. S3559, and

Assembly Tool AT4 (see Tool List) to occlude the

Module from

thePessureeBBalancing_Modulee----

high

pressure inlet ports to

-

a pair of needle nose pliers remove the bypass nipple, Part No. S3547, (see

8).

aflix

2

I~

(

I

i I

i

I

!

i

Document

Figure

8.

Showing needle nose pliers removing nipple

CAUTION

Grasp the nipple at the base next to the Proportioning valve block or the nipple may be damaged.

No.

M672SM.

Version

1.10.

Issued

8th

November

1994

-

not on the end

Page

63

of

85

,

~

,

.

C.2.5

C.2.6

Using a

114" nutdriver, install the brass plug,

bypass nipple port.

Install the flowmeter mounting block.

Part

No. S3635, (see Tool List) into

.

-

--

*

r

..

.

-

<.

r

-

%

*.

L

-

C.2.7 Connect the Medical Breathing

C.2.8

NOTE:

--

Connect the proportioning outlet to the calibrated Oxygen analyser.

The Oxygen analyser must be calibrated and the accuracy of the readout scale must

-

.

be-3hi5ZlD!~ySer~ings specCified- throughoutthe-calibration procedures-

are expressed as true fractional Oxygen concentrations.

C.2.9

Select a flow of

C.2.10 Turn adjustment shaft,

7

Ipm to the Oxygen analyser.

Part

No. S3533, by

30%.

C.2.11 Attach the Mixer control knob,

S3533, and

align

the black indicator on knob with .30 position on the faceplate. Using a hex wrench, tighten the set screw just enough to attach knob; do not filly tighten the set screws at this time.

Air

and Oxygen supplies to the respective gas inlets.

hand until

Part

No. S3538, to the adjustment shaft,

the Oxygen analyser reads

Part

--

No.

L

<.

- -

L

7

.A

-

?

b

C.2.12

Turn the knob to .90 position and check the Oxygen analyser reading.

C.2.13 Using special tool AT3, loosen the

C.2.14

adjust the rear seat, reading of. 90

*

Turn the knob to the .21 position (making sure that the knob hits the stop pin), then

Part

1

%

(see figure 9).

No. S3542, until the Oxygen analyser agrees with knob

up to the .30 position on mixer, the Oxygen analyser should read 30 necessary, rotate the knob until a reading of 30 analyser, and reposition the knob to the faceplate.

C.2.15

Turn the knob to the .90 position; adjust the rear seat until the 90 k 1%.

jam

nut

Part

No. S3543. Using special tool AT2,

*

1%.

1%

is obtained on the Oxygen

align the knob indicator with the .30 position on

Oxygen

analyser reads

If

>

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

64

of

85

Figure

9.

Adjusting the Rear Seat on the Proportioning Module

C.2.16

C..2.17

Repeat steps

Turn knob to

2.14

1.0

position and make sure that the Oxygen analyser reads at least

(and no higher than

and

2.15

99.5%)

until proper readings are recorded.

and that the knob is hitting the end stop pin.

CAUTION

If resistance is met before stop pin at 1.0 position is reached, do not force the knob. Re-adjust rear seat slightly pin position. Recheck the calibration as described above.

C.2.18

Using special tool AT3, tighten the calibration of the rear seat.

-

just enough to allow free range of movement to stop

jam

nut,

Part

No. S3543, to secure the

3

98%

NOTE:

C.2.19

Document

When tightening the jam nut the

can be compensated for by setting the Mixer knob at

FI02

may drop due to movement of rear seat. This

.90

position and adjusting the rear seat until the Oxygen analyser reading is slightly above 90% (around When the

Verifjl that the

No.

M672SM.

jam

nut is tightened the Oxygen analyser should come down to 90%.

full

range of positions can be obtained within a k 3% variation.

Version

1.10.

Issued

8th

November

1994

....~

Page

65

of

91%).

85

C.2.20

When

all

calibrations

are

completed

use

an

Allen

wrench to tighten the knob set

screw(s) Part No. S223.

C.2.21

nipple

Part

No. S3547.

supplies

"OFF",

remove the bypass plate AT4

Turn

the

gas

C.2.22 The calibration of Proportioning Module is now complete.

and

insert the

bypass

C.3.0

Alarm

Module

(see

figures

10)

C.3.1

NOTE:

Document

Slide the

Alarm

Be

sure

No.

M672SM,

Alarm

Figure

Module onto the bypass nipple,

10.

Module to the Pressure

O-rings

are

.

,I

Version

in

place between modules.

1.10,

Issued

Bypass/Alarm

Balancing

8th

Nwember

Module with two screws,

1994

Module

Part

No. S3547,

Part

Page

and

secure the

No.

66

of

S3624.

85

C.3.2

With the Mixer

still

now be performed.

attached to gas supply lines the calibration of

Alarm

Module can

C.3.3 Test procedure for acceptable alarm bleed response:

regulate to

Oxygen down to 2 level.

4

Bar

(60 PSI) leave the

Bar

(30 PSI), the alarm should sound continuously down to this

If

it does sound throughout the 2 to

air

"OFF",

turn

the Oxygen valve "ON" and

the alarm should sound. Turn the

4

Bar

range the alarm bleed is fully

functioning.

CAUTION

The alarm bleed set screw, Part No. S3568, is calibrated at the factory and should not require calibration.

If

the

C.3.4

alarm

before perfbrming the alarm bleed calibration. The alarm reed may require adjustment or be damaged or contaminated. To adjust the reed, use a small instrument screwdriver through the centre hole of the black cover cap, ISUO10, adjust the screw to obtain the alarm sound over the range.

is not functioning properly, check the alarm reed,

Part

No. S500006,

Part

No.

--

C.3.5

C.3.6

If

the alarm bleed does need calibration, use tru-arc circlip pliers to remove the truarc ring, the

alarm

Part

No. S3570, that holds the alarm reed cap assembly in place and remove

reed cap assembly complete, Part No. S500006, do not attempt to

disassemble the alarm reed cap assembly.

If

alarm

does not sound at lower range of 2 Bar (30 PSI) the flow to reed needs to

be increased. This is achieved by adjusting the alarm bleed set screw, Part No.

S3568, clockwise.

If

alarm does not sound at the upper range of

4

Bar

(60 PSI), or

hesitates when the cap is occluded, flow to reed must be decreased by adjusting the

alarm

placed in its seat and held by hand to of sure that the O-ring,

bleed set screw counter clockwise. After adjustment the reed cap must be

verrfl the

alm

has been tested and verified install the tru-arc ring over the reed cap making

Part

No. S3569, is in place to seal the reed cap assembly.

alarm

function. When the

full

range

Document No.

M672SM,

.

..

Version 1.10,

..

Issued

. . .-. - . .

8th

November 1994

. . . .

..

-.. -.

Page

67

of

. .

-

. , . . .

-

--

85

CAUTION

Do not occlude the

r

:,

C.3.7

.

-

-.

NOTE:

To calibrate the bypass Oxygen and

.-

The Oxygen calibration adjustment is located under the

air

alarm

to

"ON"

outlet ports as permanent damage to the

alarm

Oxygen calibration adjuster,

and regulate to

4

Bar

(60

- - -

PSI).

-

Part

air

-

inlet and the

alarm

No.

--

reed

S3622,

air

calibration

will

turn

the

adjustment is located under the Oxygen inlet.

C.3.8

C.3.9

The

alarm

should be silent.

Using the gas supply regulators set the

reduce the Oxygen supply. The

and

30

PSI).

alarm

air

supply to 4

Bar

(60

PSI)

should sound at between 1.6 and

and slowly

2

Bar

(24

C.3.10

C.3.11

C.3.12

C.3.13

NOTE:

If

no

alarm

sounds, loosen the

(located under the air inlet

Part

jam

No.

nut,

Part

S3622)

No.

S3623,

and turn the Oxygen adjuster

counter clockwise slowly until the

alarm

sounds.

If

the alarm is sounding when the gas supply is turned on, turn the Oxygen adjuster

turn

(under the air inlet) clockwise until alarm stops then

alarm sounds.

the

counter clockwise just until

Reduce the Oxygen pressure to zero to relieve pressure within the hose from the Mixer to regulator.

After venting, no pressure should build up on the Oxygen regulator gauge.

If

pressure does starts to build up on the Oxygen gauge the duck bill valve,

S3525,

in the Oxygen inlet is leaking and causing a back flow of air into the Oxygen

Part

No.

inlet. Clean or replace the duck bill valve as needed (see disassembly of gas inlet

in

valves

Routine Maintenance Section.

.

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

68

of

85

C.3.14

Open the before

2.7

Oxygen pressure to 4 Bar (60 PSI), the alarm should stop sounding at or

Bar (40 PSI).

C.3.15

C.3.16

Tighten the jam nut over the Oxygen calibration adjuster

To calibrate the bypass alarm

replacing

located under the Oxygen inlet.

C.4.0

C.4.1

Tests for Mixer function

After Module test procedure (see Test Procedure Section for Pressuie Balancing Module).

C.4.2 The

C.4.3

To reassemble to the Section.

to secure the calibration.

air

calibration adjuster, complete steps 3.5 through

air

for Oxygen in the instructions, remembering that the

all

calibration procedures are completed, perform the Pressure Balancing

air

Air/Oxygen Mixer is now calibrated and ready for use.

Want Flown enclosure see the Disassembly and Re-assemble

3.7,

adjuster is

~

DISASSEMBLY

-

General procedures

Before servicing, be sure all exterior connections such as the electrical

power cord, gas lines etc. are disconnected.

D.

1 .O

1.1

Removal of the AirIOxygen Mixer from the Infant FlowTM enclosure.

Remove the four the Infant

Flowm driver and the four

M3

x

6mrn raised countersunk screws that secure the top cover of

rear cover plate.

D.

1.2

Using 3/16" Allen wrench remove the two screws, Rail

mount/gas inlet plate on the back of the mixer and slide the plate back and off of

the O-rings.

D.

1.4

Using a 3/16" or 118" Allen key remove the pole mount bracket fi-om the side of the

Infant

lower

Flown driver. The mixer/flowmeter assembly can now be removed from the

housing.

AND

RE-ASSEMBLY

M3 x 8mrn pan head screws that secure the

Part

No. S3630, which hold the

L

-

Document

No.

M672SM,

--

.

,.

'

Version

-

1.10,

Issued 8th

. . .

.

November

-~

1994

Page

69

of

..

85

~. D.2.0

,

.

,

.

D.2.1

Removal

Using a

of

the Flowmeter block from the

9/64"

Allen wrench, remove the two screws,

miser.

Part

No. S3579, from the side

of the flowmeter block. Pull the flowmeter block away fiom the Mixer.

.

D.2.2

Save the

O-ring,

Part No. S3578, located between flowmeter block and Mixer for

re-assemble.

,

.

D.3.0

D.3.1

Disassembly into 3 major modules: Proportioning Module, Pressure Balancing Module

To remove the the two

and

fixing

Alarm

screws,

Module

Module, Part

Part

No. S3604, use a 7/64" Allen wrench to remove

No. S3624, underneath the module (see figure 13).

Figure

D.3.2

D.3.3

Slide the

lift

the assembly

Remove the overlay fiom the faceplate

Alarm

fiom the faceplate.

L,

Document No.

M672SM.

13.

The Alarm Module being taken

off

Mixer

Module straight back to clear the bypass nipple, Part No.

off

of

the Mixer.

and

remove the two screws,

This

enables the removal of the faceplate from the mixer.

Version

1.10.

Issued

8th

November

1994

Part

Page

70

3547,

No.

of

and

S3559,

85

D.3.4

Figure

Using a

9/64"

Allen wrench, remove the four screws, Proportioning Module, fiom the Pressure figure

20).

Balancing

14.

Proportioning Module removal

Part

No. S3502, and separate the Proportioning Module

Module, making sure not to displace the

Part

No. S3550 from the

"0"

rings (see

4

L

Proportioning Module

D.4.0

D.4.1

D.4.2

D.4.3

D.4.4

D.4.5

Disassembly.

Using either a

S3538,

by

removing the set screw(s), Part No.

Insert special tool

112"

open end wrench to turn

With the fiont seat removed the double tapered needle, Part

Turn the module over to the rear seat, Part No.

Insert special tool

314"

open end wrench.

(see figures

1/16"

or

AT2

into the front seat, Part No.

AT3

into rear seat locking nut,

8)

5/64"

AT2

Allen wrench, release the control knob,

S223,

then pull off the knob.

S3532,

locating holes. Use an

and remove the fiont seat.

No.

S3541,

will fall out.

S3542.

Part

No.

S3543,

and loosen using a

Part

No.

9

Document

No.

M672SM.

Version

1.10.

Issued

8th

November

.

1994

....

Page

7

1

of

85

D.4.6

D.4.7

With the locking nut loosened, insert special tool AT2 into the rear seat unscrew and remove the rear seat.

The

fkont seat, rear seat and proportioning block can now be serviced.

D5.0

D. 5.1

-

D.5.2

D.5.3

D.5.4

NOTE:

Re-assembly

Before reassembling the Proportioning Module inspect

ring

that is cut, flat or worn and apply a light coating of Krytox to the f?ont and rear

of

Proportioning

Module

all

O-rings and replace any

0-

seat O-rings.

-

Using special tool AT2,

install

fiont of the proportioning block is identified making sure not to tear the

O-ring.

Turn the adjustment shaft, Part No.

._

the front seat,

Do not

__

-

Part

install

-

No.

S3532,

by

the presence of two stop pins),

the

knob

into front seat port (the

at this time.

S3533, counter clockwise until resistance is felt.

Place the Proportioning Module front seat down.

The module must be level, which may be accomplished by either placing the module into a vice or positioning it on two level blocks.

D.5.5

D.5.6

D.5.7

Part

Drop the double tapered needle,

No. S3541, into the rear seat part and make

sure that the needle is standing up straight in the centre of the valve bore.

Part

Install the rear seat, that the needle stays centred. Using special tool rear seat down (about needle. In this position, back

No. S3542, into the rear seat port, working it carehlly so

AT2

(hand tighten only), screw the

6

turns) past the first resistance until contact is made with the

off

1/2

turn.

Calibrate the Proportioning Module (see Calibration Section for Proportioning

Module).

'.

'

Document No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

72

of

85

Pressure

Balancing

Module

(see figure 3)

---

D.6.0

D.6.1

Disassembly of Pressure Balancing Module

For disassembly of the Pressure Balancing Module the Proportioning Module,

Alarm

Module and faceplate must be removed.

D.6.2

Usiig a 3/16" Allen wrench, remove the 4 screws,

Part

No. S3507, from the

air

block, Part No. S3505.

D,6,3--~einedule-cornesapaFt-int03-s~

assembly.

NOTE: Disassembly, re-assembly and calibration of the

air

block and oxygen block are

identical.

D.6.4 Using

a

pair

of tru-arc pliers, remove the

tru-arc

ring

Part

No. S3565.

--

q

--

D.6.5

D.6.6

NOTE:

D.6.7

D.6.8

D.6.9

The cover disc, Part No.

S3564

will

pop up with the spring, Part No. S3515, and the

regulator needle, Part No. S35 14 can be removed.

Using

5/64"

Allen wrench, loosen set screw Part No. S35

18

from side of block.

It is not necessary to completely remove the screw fiom the block.

Using special tool

The

regulator seat,

AT1

remove the eccentric adjuster Part No. S35

Part

No. S3512, can now be removed from either end.

The seat and seat bore can now be serviced.

16.

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

73

of

85

Section

12

~.

.

-

.

.,

.

-

.

-

,

-

,

.

<,

Parts

This is a complete list of all components Driver. It is intended to enable qualified engineers and technicians to purchase

carry

required to

..

+-parts-list

out service tasks as well as the routine maintenance procedures.

is-dso-sh~w-wit~h~~h-sub-assembly_drag-to-e~ble~o.mponents

and

List

sub-assemblies used

in

the

EME

Infant FlowTM

any

spare parts

to

bereadily

identified.

When ordering parts please ensure that the part numbers selected are current for the version of the product that you have. A list

manual

in

the Updates Section.

of

changes

Complete

by

Serial Number is shown at the

Parts

List

back

of this

Part

Number

ARP0066 ARPO 107 ARP0120 ARP0253 ARP0295 ARP0304 ARP0422 ARP0426 ARP0498 ARP062 1

ARP0756

BPKEYS

Description

Pressure Transducer Transformer, type 6384, flat pack

Safety Valve Spring

118

BSP Dowty Seal

Nitrile 0 Ring,

BS

006, 118 x 1/4",

3

x

6.3

mm

Warning Whistle Diaphragm Nitrile 0 Ring, BS 013, 7/16 x 9/16", 11 x 14.2

118 BSP Low Pressure Seal Nitrile 0 Ring, BS 010, 114 x 3/8", 6 x 9.5 NIST Connector, 118 BSP, MA4

Air

mrn

118 BSP Male to Male Elbow NIST Connector, Rail Claw Clamp,

118 BSP, Oxygen S&W

Keyboard Switch

Diaphragm, Silicone Rubber

mrn

EC.01/63 EC.047163 EC. 1/100C EC.22/100

<,

Document

No.

M672SM,

Capacitor, Polyester, 0.01 Capacitor, Polyester, 0.047 Capacitor, Ceramic, Capacitor, Ceramic, 0.22

Version

1.10,

Issued 8th

0.1

pf,

63

pf,

63

pf,

100

pf,

100

November

V

1994

V

Page

74

of

85

Part Number

Description

EC.471100

EC. 47/63

EC

113 5

EC 10016.3

EC221160 EC470140 EC4700116

EF 1 OOMA EFl

AMP

EF2OOMA EF250MA

Capacitor, Ceramic 0.47 pf, 100 V

pf,

63

pf

V

160 V

pf,

6.3

pf, 40

V

Capacitor, Polyester, 0.47 Capacitor, Tantalum, 1 pC35 Capacitor, Radial Electrolytic, 100 Capacitor, Polystyrene, 22 Capacitor, Radial Electrolytic, 470 Capacitor, Radial Electrolytic, 4700 pf, 16

Bridge Rectifier, 1

A

Diode, 1N4002, lOOV Yellow LED, 5mm x 2mm Intensity Matched Green LED,

-Bed-Lzmmx2mm Intensity

5mm x 2mm Intensity Matched

MlZtdied

7 Segment Red LED Display, HDSP75 1 1

Fuse, 100

Fuse, Fuse, 200 Fuse, 250

mA,

Anti Surge (For 2201240 V Settings)

14 Anti Surge

mA,

Anti Surge (For 1001120 V Settings)

mA,

Anti Surge

TO3 Insulating Cap TO3 Insulating Kit

10 Way Turned

14 Way Turned

IC Socket

Clippard 15002- 1M5 Adjustable L Fitting

16 Way Turned Pin IC Socket

V

-. .

EHSH EHSHCC EH5W

Harwin M20-983 20 22,20+20 Straight Socket

Harwin

Heatsink,

M20-998-20 05,20+20 Pin Header

TO220 Clip on,

25"N

Fuseholder, Board Mount

2 Way Housing

2 Way Pin Strip

3 Way Housing

M3

Crirnp Eyelet

3

Way Pin Strip

Takbro

SMC

Crystal, 4

TS3P-SHF- 1

TU0425B-20 Poly Tubing, 4

MHz

AA,

3 Way Base Post, Right Angled

mrn

OD,

2.5

40 Way Turned Pin IC Socket

Nylon Spacer, 4.7

mm

4 Way Crimp Connector Housing

4

Way

Strip

Takbro JST

VHR-SN, 5 Way Housimg T&bro JST BVH-21 T-1.1 Crimp Connector ~akbro JST BSP-VH, 5 way straight Header

mm

ID

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

75

of

85

Part

Number

Description

Spacer Type C, 26

mm

long

6 Way Turned Pin IC Socket

8 Way Turned Pin IC Socket

EHFD

SHF-00IT-0.855 Wire

Double Fuse Drawer, Timonta ZFKE003 50002

SMC KQH04-UO

G

&

B

Projects Spacer Type C, BS11.2-M3,

1,4

Crimp

mm

~-S~Typ~6375~Q2~~-x~

Harwin

G

SMC KQH04-M5,4

SMC

Spacer Type B, R30-3000802,

&

B

Projects Spacer Type

rnrn

KQL04-M5,4

mrn

EHPE Timonta Power Module,

with

6-32

UNC

Thread

Push

Fit Connector, 118 BSP Thread

M3

x

11.2

rnm

6mm-

--

M3 x 8rnm

B,

BP8.4-B-M.3,

M3

x 8.4

mrn

Push Fit Connector, M5 Thread

Push Fit Connector Elbow, M5 Thread

FKSB2-55-6N5K2

EHSM4L EHSSC

Sonitron SM4BL alarm sounder SML,

Test

"F"

Spade Crimp

Pin,

William Hughs Type 10 1, White EHVS Voltage Selector EP 1 OOKRAS

EP 1 OORRAS EP 1 OKRAS EP

1 KRAS

EPlKW

.EPlMRAS

EPS OKRAS EPSKRAS

ER 1 OOK

ER

1

OK

ER

120K ER120R ER 1 2K ER13K ERl5OK ER 1 60K ERlK

Bournes Potentiometer 3266X-1-104, 1 Bournes Potentiometer 3266X-1-101, 100R, Bournes Potentiometer 3266X-1-103, 1 Bournes Potentiometer 3266X-1- 102,

1

K

PCB

Mounting Potentiometer, no Shaft,

Bournes Potentiometer 3266X-

Bournes Potentiometer 3266X-1-503, 50K, Bournes Potentiometer 3266X-1-502, 5K,

Resistor, 1 OOK, 2%, Metal Resistor, 1 Resistor,

OK,

2%, Metal Film

120K, 2%, Metal Resistor, 120R, 2%, Metal Resistor,

Resistor,

Resistor, ~esistor,

.

).

'

12K,

2%,

13K,

2%, Metal Film

150K, 2% Metal Film

160Y 2%, Metal

lK,

2%, Metal Film

S/P, Timonta ZFKV00240205

OOK,

?A"

!A"

OK,

!A"

lK,

?A"

MEC

1-

105, lM,

Film Film

Film

Metal Film

Film

?A"

%"

CITEC

5

1

Document No.

Resistor, 22R,

M672SM,

Version

1.10,

2%,

Metal Film

Issued

8th

November

1994

Page

76

of

85

Part

Number

Description

ER22R1 W ER2K

Resistor,

Resistor, 2K, 2%, Metal ER2K2 Resistor, 2K2,2%, Metal ER2K7 Resistor, 2K7, 2%, Metal

ER47OR Resistor, 470R, 2% Metal ER4K7 Resistor, 4K7,2%, Metal

ER5 1R

Resistor, 5

ER6K2 Resistor, 6K2,2%, Metal ER6K8 Resistor, 6K8, 2%, Metal

22R, 1 W, Flame Proof, Vishay

Film

Film Film

Film

lR,

2%, Metal

Film

Film ERLD 12 Silonex NOR12 Light Dependant Resistor ERN1

00KX4

ERNlKX4

ES02 ESlO

Resistor Network, Bournes 1 OOK x 4,4608X- 102- 100K Resistor Network, Bournes 1K x 4,4608X-102-1K

Resistor Network, Bournes 4K7

x

8

PMI AMP-02, Instrumentation Amplifier Operational

Arnpliiier, LMl OCLN

FP1

22R 2%

ESCNY 17

Quad Operational Amplifier

SG3

548N Quad power monitor, Silicone Power

National Semiconductor

8 Bit Micro-Controller,

Maxim Hams

SGS

CNY

5V

MAX694CPA

ICM72 12AMIPL Display Driver

L9700 or TL7726 Hex Precision Clamp

17-32 Opto-Isolator

Power Regulator LM309K

MM5450N LED Driver

MC68705R3P, Programmed

MPU

Supervisor

ZETEX ZVN4306A DMOS N-Channel Transistor National Semi

National Semi LM3

2N5087 Low Noise

17L Adjustable 100

Voltage Regulator LM78 15,

+

15

PNP

VDC

Transistor

rnA

Regulator

Voltage Regulator LM7915, - 15 VDC

Document No.

M3

M3 x M3

M672SM,

x

6mm Pan Head Slotted Screw

x 6mm Countersunk Slotted Screw

kmm Raised Countersunk Screw

jr'

6mm Socket Set Screw, Cone Point

Version

1.10,

Issued

8th

November

1994

Page

77

of

85

Part

Number

Description M3

x

8rnm

Pan

Head Slotted Screw

M3 x 8mm

M3

x

M3

x

M3

Nylock Nut

M3

Plain Nut

M3

Plain Washer

M3

Shakeproof Washer

M4

x

Countersunk Slotted Screw

12mm Pan Head Slotted Screw

16mm

6

Pan

Head Slotted Screw

mm

Countersunk Slotted Screw M4 x 6rnm Socket Set Screw, Cone Point M4

x

6mm

Socket Set Screw, Cup Point

-M4x8mmY om=-HeadScrev--M4

x

12

mm Socket Cap Head Screw

UNF

6

52

mm

HalfNut

Socket Set Screw, Cup Point

mm

Pan Head, Pozi Drive Brass Screw, Plated.

5/16 M5 M5

x

M5 Spring Washer

..

. . . ....

. .

.

ISUO 10

LAB

1

M6

x

12

rnrn

Countersunk Socket Screw

M8 Shakeproof Washer

20

UNC

114

x

518"

Socket Cap Screw

20

UNC 114 x 314" Socket Countersunk Screw

8-32

UNC

x

1.5"

Socket Cap Screw

Audible

Alarm

Cover Cap, Vented Earth Symbol Label Filter Element, Sintered Bronze

5pm

Water TrapNilter Baffle

Water TrapFilter Deflector

0

kng

0.005" Flow Restrictor, Air Logic F-2815 050

Power Supply Board, General Purpose

MkII

Power Supply Board Assembly,

Znfant

Flowm Driver

.,

,

Tube, Pressure Transducer Adaptor

Aidoxygen Inlet Mounting Block Aidoxygen Inlet Block Assembly

0

to 15 lpm Dwyer Flowmeter

M67 102

M67

.

M67 1 024 Pop-Off Valve

Document No.

1

1023 Pep-Off Valve Body

M672SM.

15mmFemale Taper Outlet

Shaft

Version

1.10,

Issued

8th

November

1994

Page

78

of

85

Part

Number

Description

M67 1 025 Pop-Off Valve Adjuster M67 1026 Pop-Off Valve

Seal

M67 1027 Pop-Off Valve Assembly

Electronic Module, Mechanical Assembly, Display Board for

MkII

MMI

MkTI

Display Board Assembly for Processor Board for

MkTI Processor Board Assembly for Mixer Shaft Monitor PCB Mixer Shaft Monitor PCB Assembly

-Ffefl*-a.Re-LLll~lld~ant*w")nurn-

Front Panel Assembly, Left Hand,

Right

Front Panel,

Hand,

Front Panel Assembly, Right Hand,

MkII

Rear Panel for Mixer Mixer

SpacerIMounting Plate Spacer/Mounting Plate Assembly

Flat Tie Bar for

Infant Flowm Driver, English

MkII

Infant Flowm Driver Regulator Mounting Bracket Electronics Chassis for

MkII

Electronics Chassis Assembly for Upper Case for Lower Case for Overlay, Left Hand for

MkTI

Infant Floww Driver

MkII

Infant Flowm Driver

MkII

Overlay, Right Hand for

Infant Flowm Driver

MkII

Infant Flowm Driver

MkII

Infant Flowm Driver

MMI

Infant Flowm Driver

MkII

Infast Flowm Driver

MkII

Infant Howm Driver

Infant Flowm Driver, English

MkII

Znfmt Floww Driver, English

Infant Flowm Driver, English

MkD

Infant Flowm Driver, English

-

.-

Flowmeter Mounting Block Flowmeter Mounting Block Assembly Valve Cap Block Filter Clamp Screw

Valve Seat Ring, Stainless Steel

7

Micron Stainless Steel Filter, Machined

Shaft

Mixer Knob

&

Adaptor

Skirt Assembly, Mixer Knob & Skirt Assembly, Flowrneter Flowmeter Blanking Plug, Modified Flowrneter Indicating Ball

M672030 M67203 1 M672032

Flowmeter Adaptor, 1/4 to 118 BSP

0

Ring

BS 0151-16

Cable Assembly, PSU to CPU Board, 5 Way

M672040 Label, Oxygen Calibration M67204 MAF200 MAF2000- 1

1

Label, Gas inlets Air

~iltert~ater Trap Body

Watef TrapRilter 118 BSP, 5 Micron

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

79

of

85

Part

Number

Description

MAR1 000 SMC Regulator AR1000

Water Trap Bowl

and

Drain, Polycarbonate

Clippard EV03-12fM5 Solenoid Valve

Teledyne

R22

Galvanic Oxygen Fuel Cell

1/8 BSP Male to Female Extension Adaptor

--

Special

1/8 BSP Male to Female 90" Elbow

Air/Oxygen Mixer Assembly

6-2ZUNC8'"C0unter~unk-So-cket-H-ead-Scrm---

Set Screw, 6-32 x 311

6"

10-32 x 1/16" OD Tube Connector 1/16" Tygon Tubing

Pressure Balancing Module Sub-Assembly Proportioning Valve Sub-Assembly

Air

Block Oxygen Block Screw,

1/4"-28 x 1 1/4" Socket Cap Diaphragm Diaphragm Support Plate

-

--

Diaphragm Assembly

114"-28 x 7/16" Set Screw Regulator Seat Nitrile O-Ring, BS 01

1

Regulator Needle Spring, Stainless Steel,

LC-014B-4SS Eccentric Adjuster Nitrile O-Ring, BS 007

Set Screw, 8-32

x

114"

Nitrile O-Ring, BS 014 Nitrile O-Ring, BS 0 12 Sintered Stainless Steel Filter Only Filter Kit Assembly (Filter O-Ring

Spring,

LC-042-El SS

Spring Adaptor

Duck Bill Check Valve

118"

118" BSP

BSP

Nipple, DISS Oxygen, Nut,

DISS

Oxygen

Air DISS Fitting, Proportioning Valve Block Only Oxygen Seat

&

Spring)

Document No.

M672SM,

Version 1.10,

Issued

8th November

1994

Page 80 of 85

Part

Number Description

Adjuster

Shaft

Nitrile 0-Ring, BS 008

Packing Washer, Nylon Truarc Ring

Stop Pin, 1/16"

x

114"

Mixer Control Knob with Stop and Screw Double Taper Needle

Air

Seat, 0.125

Jam

Nut, Proportioning Valve Spring Thrust Adaptor Spring, Proportioning

L-eefPlugmWq

Valve

G.=iat~e:tm Nipple, 1 0-32 Nitrile 0-Ring, BS 006

118"

Plug,

NPT

Screw, 8-32 x 1" Socket Cap Screw, 6-32

x

114" Pan Head

Cover Disc Truarc Ring, 5000-87 Nitrile 0-Ring,

BS

01 8 Lee Plug and Pin, 0.156" Diameter Nitrile 0-Ring, BS 025

Truarc

Retainer, 118"

Circlip Ring, 5008-1 3

NPT

1

Adaptor, Flowmeter Inlet

Nitrile 0-Ring B S 0 13

Orifice, 0.01

1"

x

0.156 Diameter

BypassIAlarm Sub-Assembly

Pole Mount Clamp

Pole Mount Clamp Knob

AlarmlBypass Block Only Poppet,

Silicone 0-Ring, BS 010, 50 Spring,

Adjustment Cover Cap,

BypassIAlarm

302

Stainless Steel

DUR

BypasdAlarm

Calibration Adjuster, Bypass/Alarm

Jam

Nut 511 6" x 20, BypassIAlarm

Screw, 6-32 x 1 114" Socket Cap

Bulkhead Fitting, Gas Met Nittile 0-Ring for S3625, BS 112

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

8

1

of

85

Part

Number Description

Screw, 114 "-20 x 314" Socket Cap

Plug, 10-32

Ball,

Spring,

Check Valve Retainer Silicone 0-Ring,

Muffler Felt

Mixer Tool Kit

AT3, 518" Spanner Wrench 318" Spanner Wrench

78"

Bypass Plate Mixer Overhaul Kit

7/32" Diameter,

custom for

Bypass

BypassJAlarm

BS

008, 70

Spanner W~nch-

/Alarm

DUR

-

Audible Audible

Warning

Device Housing

Device Assembly

ST650008 Luer Connector, Plated

Document No.

M672SM,

. .

,.

'

Version

1.10,

Issued

8th

November

1994

Page

82

of

85

Section

13

Summary

The following international standard symbols are used on the EME Infant Floww Driver and

all

in this manual. It is essential that

symbols.

Symbol

Explanation

Class

1,

users of the equipment have a

type

B

Equipment

of

Symbols

fhn

understanding of the

ir

W

Alternating Current

@

a

m

0

Earth

(Ground)

Alarm

OK

On, Power connection to mains

cancel

Power disconnection from mains

Document

No.

M672SM.

..

'

Version

1.10.

Issued

8th

November

1994

Page

83

of

85

Section

14

All

changes are logged

all

otherwise indicated version

may

be fitted to any M672 MkII Infant FlowTM Driver. We recommend that the latest

software changes are compatible with

version available be fitted at

--

I

Serial

No

I

Range

0100

to

01 09

0109

to

0149

Change No.

Original version with level

Effective from 25th August

1

All IC's fitted directly to PCB instead of sockets except for

2

Filters fitted on Oxygen Analyser and Vent to Ambient ports. Label added to side for Oxygen Analyser calibration.

3

Label added to mixer to indicate gas inlets.

4

5

Service manual updated to include electronic over pressure set up. (Page

6

Service manual updated with additional information on Oxygen Fuel Cells.

(Pages

Product

in

serial number sequence as indicated in the table below. Unless

aU

times.

Change

History

all

hardware and any software

Change

1 .OO

software introduced July

1994

CPU.

12, 13 & 14)

41)

-

.-

0150 and up

Change No.

Effective from 8th November

7

Version 1.10 software introduced. To be issued for all M672's

8

New tracking

8

High

pressure Vent to ambient alarm and valve operation changed fiom 15

10

Cms H20 to

100%

11 12

New method of calibration for the Oxygen setting monitor board. Calibration mode simplified and extended

13

LED

14

IS

Operation & Routine Maintenance Manual updated to Version

16

Service Manual updated to Version

Oxygen for 1 5 minutes

colour in the 7 to

*.

'

High

pressure

11

Cms H20

12

1994

alarm

Cms

feature

feature removed.

Hz0

range changed fiom green to yellow

1.10

Document

No.

M672SM,

Version

1.10,

Issued

8th

November

1994

Page

84

of

85

Section

15

WARRANTY

This is the standard warranty for all products manufactured or supplied by Medical Equipment) buyer purchasing the said product directly from the company or fiom

distributor or agent as new merchandise.

AU

products supplied by EME are warranted for a period of one year from the date of

installation or eighteen months fiom the date of delivery (whichever comes sooner) to be

from manufacturing defects and to conform to the description thereof contained

Operation and Routine Maintenance Manual, except that such warranty is

days with respect to rubber goods.

EME's sole obligation under this warranty is limited to the replacement or repair of the product

or parts

conform to the description thereof contained in the relevant manual.

consequential damages.

The foregoing warranty shall not apply

or altered by anyone other than an authorised representative of EME without written consent

(ii) subjected to abuse, misuse, negligence or accident

than normal use (iv) the prescribed periodic maintenance and/or services have not been

performed as specified in the relevant manual.

--

theieof which upon examination are found to contain manufacturing defects or not to

Limiied (hereinafter referred to

if

the product or any part thereof has

as

EME) andjsJxtendehonLyde-

EME

(ii)

operated under conditions other

E.M.E.

an

authorised dealer,

limited to thirty

will not be liable for

(i)

(Electro

free

in

the relevant

(30)

been repaired

3

r

'I

There are no warranties which extend beyond this warranty and the description of the products

contained in the relevant Operation and Routine Maintenance Manuals.

warranty

to statutory wwranty and in no way affects the purchaser's statutory rights.

Document No.

as

to merchantability with respect to the products. This warranty is given in addition

M672SM,

Version

1.10,

Issued

8th

November

1994

EME makes no

Page

85

of

85

MkIl Infant Flow M672 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual