Welch Allyn SP-10 Operator Manual

.

Cardio Menu

Operator Manual

.

..

..

.

SCHILLER

SERVICE

HANDBOOK

SP-I0

Spirometry

Unit

Issue

2

July

1998

SP-10

Spirometry

Unit

July1

998

SCHILLER

Altgasse

CH-6340 Baar, Switzerland

41

Phone:

Fax:

Home page:

41 760 87 87

i414176108

http://www.schiller-ag.ch

i

68

AG

80

Article

Number:

2.

540

006

SCHILLER

SERVICE

SP-I0

HANDBOOK

Spirometry

Issue

2

July

Unit

I998

Issue

1:

Issue

2:

Associated

Guide

to

SCHlLLER Interpretation

and Measurement
SCHILLER
SCHILLER
SCHILLER
SCHILLER

SP-10

May 1996
July 1998, Update and

Documents

Program

SP-I0

USER

SP-I0

USER GUIDE

SP-10

USER GUIDE - French

SP-10

USER GUIDE -USA

E / D I F

GUIDE - English

Service

Article

Number

revision

-

G~~III~II

Handbook

2.540

to

incorporate

006

latest hardware and

Article
Article
Article
Article
Article

software.

No. 2.
No. 2.

No.

2.510

No.

2.

No.

2.

510

510

510

510

179

130
129

131

277

0

Copyright 1998 by SCHJLLER

AG

93/42/EEC
'Notified

Body'

Medical Devices:

DEKRA

AG

0124

-_

SCHILLER

SERVICE

HANDBOOK

SP-I0

Spirometv

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Unit

2

July

I998

DECLARATION

Diagnostic

Serial numbers
Year

of

System

starting

manufacture:

:

with:

OF

CONFORMITY

Spirovit

SP-10

040.
1997

Onwards

We, the undersigned, hereby declare that the medical device (class
above conforms with the essential requirement listed in Annex

93/42/

E

EC

.

This

declaration is supported by:

Certificate

of

approval

No.:

11425-01
45112-60-01
45112-16-01

IS0

9001

(REV.

1994)

IS0

9001/08.94EN466001/ 12.93

Annex

II,

Section 3 of

EN

46001

the

directive

1

of

IIa)

specified

EC

Directive

by

SQS

by

DEKFUmd

93/42fEEC

(€01

24

Baar (Switzerland) Dated 30.06.1998

J.J.

Schmid Markus Butler

Research

&

Development Manager Quality Assurance Manager

...

111

Where

to

Obtain

Service

SCHILLER

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SP-I0

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2

July

Unit

I998

1

I

I

J

1-

America

Asia Pacific

Austria

I

WELCH ALLYN SCHILLER Inc.,
92121,

USA
Telephone:
Fax:

SCHILLER Asia Pacific,
Petaling Jaya, Malaysia

Telephone:

Fax:

SCHILLER Handelsgesellschaft
24,

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Telephone:

Fax:

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[phone]
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Canada

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Germany

(EU-Bevollmiichtigter)

Telephone:

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D
Telephone:

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01 49 41 24 40

0149412449

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089 629 981
089 609
089 629 981 36

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OOO

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50

9

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,7420

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SS

3/33,

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mbH

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Str.

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Other

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Telephone:

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Telephone:

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SCHILLER
Telephone:
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I

Home page:

[phone]
[phone]

[phone]
[phone]

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09

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AG,

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41

http://www.schiller-ag.ch

68,

CH-6340 Baar, Switzerland
41 760 87 87
41 761 08 80

iv

400 023

15,1-50125

14, CH-8953

Firenze, Italy

Dietikon, Switzerland

I

SCHILLER
SERVICE

SP-

I0

HANDBOOK

Warranty

Disclaimer

Spirometry Unit

Issue 2 July

1998

The Information in this guide
given

as

to the correcmess
regarding the contents of this
changes
any person

in

the specification

of

such revision

has

been carefully checked for reliability; however no guarantee

of

the contents and SCHILLERmakes no representations

manual.

of

the product described within at any time without obligation

or

change.

We

reserve the right to revise

this

document and make

or

warranties

Trademarks

SCHILLER and
property

of

Copyright

0

Copyright
transcribe, store in
electronic, mechanical, magnetic, optical, chemical,

publication without express written permission

Terms

of

Warranty

The SCHILLER SP-10 is warranted against defects in material and manufacture for the duration
of one year
accident or
part. Any liability for subsequent damage
unqualified persons attempt

in

case

OC

SP-10

are registered trademarks

their owners.

of

SCHILLER

AG.

All

trademarks are the

Notice

I998

by SCHILLER

a

retrieval system

(as

from date of purchase). Excluded from this guarantee

as

aresult of improper handling. The warranty entitles free replacement of the defective

a

defect, send the apparatus to your dealer or directly

AG. All

or

to

make repairs.

rights

reserved.

tranrfate into any language, in any

of

SCHILLER

is

excluded. The warranty is void if unauthorized or

You

manual

may

not reproduce, transmit,

form

or

by

or otherwise, any part

AG.

is

damage caused by

to

the manufacturer.

any

is

to

notify

means,

of

this

an

The manufacturer
apparatus

O

persons authorized by him, and

O the

instructions.

THERE

WARRANTIES

MERCHANTABILITY
THE

if:

assembly operations, extensions, readjusbnents, modifications,

unit

ARE

PRODUCT OR PARTS THEREOF.

can

only be held responsible for the safety, reliability, and performance of the

and approved attached equipment is

NO

EXPRESS

HEREINABOVE SET

OR

OR

F?TNESS

&PLIED

FORTH.

FOR

WARRANTES WHICHEXEND

A

PARTICULAR PURPOSE

V

used

in

SCHlLLER

or

repairs are carried

accordance with the manufacturers

BEYOND

MAKES

NO

WARRANTY

WITH

RESPECT TO

out

THE

by

OF

SCHILLER

SERVICE

SP-I0

HANDBOOK

Spiroinetry

Issue

2

July

Unit

I998

Safety

TO PREVENTELECTRIC
PARTS INSIDE.

DO

OR

IFTHEDISPLAY IS DAMAGED, ALEAKAGEOFFLUIDMAY OCCUR.DONOTWHALE

THE VAPOUR FROM THIS

CONTACT IS MADE, CLEAN CONTAMINATED AREA IMMEDIATELY WITH FRESH

WATER.
THIS PRODUCT IS NOT DESIGNED FOR STERILE USE.
SWITCH THE UNIT
DONOT, UNDER

IN LIQUID.
DO NOT OPERATE

MAINS
DO NOT USE HIGH TEMPERATURE STEFULISATION PROCESSES (SUCH AS

AUTOCLAVWG). DO NOT USE E-BEAM OR GAMMA RADIATION STERILISATION.
DO NOT USE SOLVENT CLEANERS

Notices

REFER

NOT USE

THE PRESENCE

THIS

ANY

LEAD

IS DAMAGED OR SUSPECTED

SHOCKDO

SERVICING TO QUALIFIED PERSONNEL ONLY.

UNIT

IN

AREAS

OF

FLAMMABLE

FLUlD

OFF

BEFORE CLEANING

CIRCUMSTANCES, IMMERSETHE UNITORCABLE ASSEMBLIES

THE

UNIT

NOTDISASSEMBLETHEUNIT. NO SERVICEABLE

IF

WHERE

AND

THE

THERE

GASES SUCH AS ANAESTHETIC AGENTS.

AVOID CONTACT

EARTH CONNECTION IS SUSPECT OR

IS

ANY

DANGER

WlTH

AND

DISCONNECT FROM

OF

BEING DAMAGED.

OF

MOUTH

EXPLOSION

AND

THE

SKIN.

MAINS.

IF

IF

THE

,I

/

,

AND

USE ONLY ACCESSORIES
SCHILLER AG. USE
RESULT IN INJURY INACCURATE INFORMATION

THE SP-10 COMPLIES WJTH

AFFORDS

HOWEVER SPECIAL CARE MUST BE EXERCISED
HIGH FREOUENCY EOUIPMENT.

IT MUST BE ENSURED THAT NEITHER THE PATIENT NOR THE ELECTRODES
(INCLUDING THE NEUTRAL ELECTRODE) COME INTO CONTACT WITH OTHER
PERSONS OR CONDUCTING OBJECTS (EVEN

WHEN NON-MEDICAL DEVICES

ENSURE

POTENTIAL.

PROTECTION AGAINST EMISSIONS

THAT BOTH UNITS

OF

OTHER

OTHER PARTS RECOMMENDED OR SUPPLIED BY

THAN

RECOMMENDED OR SUPPLIED PARTS MAY

AND/

OR DAMAGE TO THE

EMC

REGULATIONS FOR MEDICAL PRODUCTS WHICH

AND

ELECTRICAL INTERFERENCE.

WHEN

IF

THESE

ARE

CONNECTED TO

ARE

SECURELY CONNECTED TO THE

THE

ARE

EARTHED).

THE

SP-10 IS USED WITH

RS-232 INTERFACE

SAME

UNIT.

EARTH

vi

SCHILLER
SERVICE

HANDBOOK

SP-I0

Spirometry

Issue

-_

Unit

2

Julv

I998

Safety

Notices

U"

NONMEDICAL DEVICES,
BEFORE USING THE

UMT
SCHILLER REPRESENTATFE.

THE

OVERVIEW

THE

PHYSICIANS OR PERSONNEL
AND
RECORDING MUST BE
CLINICAL CONDITION. THE RECORDING PREPARATION QUALITY
GENERAL RECORDED DATA QUALITY, WHICH COULD EFFECT THE REPORT DATA

ACCURACY, MUST ALSO BE TAKEN
IT IS

EXPERT OPINION ON
INDICATED.

OPERATING

FUNCTIONS

GUIDELINES FOR PATIENT ELECTRODE PLACEMENT

ONLY. THEY

SP-IOSPIROMETRYUNITIS

GRAPHICAL RESULTS

THk

PHYSICIANS RESPONSIBILITY TO

THE

UNIT,

AND

THE

EXAMINED

THE

UNIT ON BATTERY

THE

RS-232 INTERFACE

ENSURE

SAFEI'Y

ARE

NOT

THAT

PRECAUTIONS

A

SUBSTITUTE

AND

SIMULTANEOUSLY USING

MUST

BE FULLY ISOLATED.

AN

INTRODUCTION REGARDING

HAS

FOR

MEDICAL EXPERTISE.

PROVIDEDFORTHEEXCLUSIVEUSE

UNDER

RESULTS,

THEIR DIRECT SUPERVISION. THE NUMERICAL

AND

ANY

INTERPRETATION DERIVED

WITH RESPECT

INTO

ACCOUNT.

MAKE

AND

TO

INSTITUTE

TO

THE PATIENTS OVERALL

THE

DIAGNOSIS OR TO OBTAIN

CORRECT TREATMENT

THE

BEEN PROVIDED BY A

ARE

PROVIDED AS ON

OFQUALIFIED

FROM

AND

THE

IF

A

vii

-_

SCHILLER

SERVICE

HANDBOOK

SP-I0

Issue

Spirometry

2

July

Unit

1998

I

What's

THE SERVICE PHILOSOPHY FOR
MODULE

TION

AND
EDGE

WITH

The book

Chapter

The purpose of
to give
the operation and function of each key briefly explained. The information in

a

background to the

SCHILLER SP-10

Chapter

This chapter provides a functional overview of the SP-10 The functional description is supported
by functional block diagrams.

Chapter

in

this

Book

ALL

SCHILLER

LEVEL. THE

NECESSARY

REPLACE

OFTHE

STANDARD

a

2

SP-I0

is

divided into

1

-

Operating Elements

this

basic inbroduction to

-

Functional Description

PURPOSE

TO

ENABLE

A

FAULTY MODULE.

BUT

DOES

REQUIRE

WORKSHOP

the

chapter is

operating

Operating

PR.4CI'ICE.S.

following

to

provide

the

SP-10.

functions

Manual.

OF

THIS

BOOK

THE

SERVICE ENGINEER

THIS

BOOK

THATTHE SERVICEENGINEERIS

chapters:

an

easy reference for

This

chapter gives details of the operator controls with

only.

Complete operating information is provided in the

3 - Fault Diagnosis and Check Procedures

UNITS

IS

TO

PROVIDE

ASSUMES

all

IS

FAULT FINDING TO

ALL

THE

INFORMA-

TO

EFFICIENTLY LOCATE

NO

DETAILED

FAMILIAR

the

main

operator functions and

this

chapter provides

-i

KNOWL-

This chapter provides a guide to locate a fault
logical sequence of fault finding algorithms and procedures. Illustrations are provided
the text where needed.

Chapter

replaceable modules are also provided
of
and after replacement. Functional checks that must

also

Chapter

This Chapter provides the part numbers and reordering information for

Also

adjustment or fault finding procedures.

Chapter

The full technical specification

Chapter

This Chapter explains
diagrams.

4

-

Physical Overview & Module Replacement

This chapter gives
attributes of the unit briefly described. The physical description is supported by illustrations
showing the internal location of all modules. Removal and Replacement instructions for

tools,

jumper settings, adjustments, and settings or special requirements that

provided.

5

-

included in this chapter

6

-

7

-

an

overview of the physical construction of the

Spare Parts

are

Technical Data

Glossary

all

the acronyms and signal titles used in this book and

details of any

of

the

to

module level. The diagnostics are presented in

SP-10

with the

in

this

chapter. Each procedure is autonomous with details

are

required before

be

carried

out after replacing a new module

all

replaceable modules.

special

test

SP-

10

is given in

equipment or

this

chapter.

special

in

tools

the SP-10 circuit

to

main

required for

a

support

physical

all

are

viii

SCHILLER

SERWCE

HANDBOOK

SP-10

Spirometry

Issue

Unit

2

July

I998

What’s in this

Circuit

Diagrams

The circuit
for information only.

diagrams

Book

&

Board

and component layouts

The philosophy of

ment

Our

information and
reserve the right to revise
improvements at any time.

Your

suggestions and comments are welcome. Please contact

the

SCMLLER

Layouts

are

provided for

We

Need

Your

SCHILLER

aim

is

to provide the

the

latest

Technical Documentation Department:

is

one of continuous improve-

user

technological developments. We

this

document and make changes

all

Help

with the most up-to-date

boards.

These

details

or

are provided

Fax

41 41

761

03

34

ix

SCHILLER

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Unit

I998

X

SCHILLER

SERVICE

SP-I

0

Spirometry

HANDBOOK

Issue

Unit

2

July

I998

c_

Chapter

Operating

I

Elements

Chapter

I.

Operating Elem en

1

ts

Contents

introduction

~Tv

SCHILLER SPIROVITSP-I0

The

Keyboard

Alpha

Numeric Keyboard
General Purpose Keys
Control and Function Keys
Test Function Keys

Connector

panels

Side Panel
Back Panel

Mains

Panel

1.2

I.2

1.4

1.4

1.5

1.6

1.7

1.8

1.8

1.9

1.10

Page

1.1

Chapter
Operaring

I

Elements

-

SCHILLER

SERVICE

SP-10

HANDBOOK

Spirometry

Issue

2

July

-_

Unit

1998

Introduction

/

The

SCHILLER

The

SPIROVIT

capable of working in four measurement

0

Forced

0

Vital

capacity

0

Expired or Minute Ventilation

0

Maximum
In addition options enable resistance testing, and blood oximetry diagnosis
The

test

results are displayed on the integral

Theopenpneumotacho transducers

for respiratory measurement.

Three

RS-232

The unit
The

(designated

also

SP-10

SP-10

is

a

Vital

Capacity

Voluntary

interfaces and one

has

can

also

SEMA),

ventilation

facilities for connection

be

connected to the

for the validation and archiving

sophisticated compact work-station for pulmonary diagnosis. It

SP-20/SP-1 lO/SP-150,

RS-422

SPIROVIT

modes

as

follows:

LCD

and recorded on the built-in thermal printer.

interface are provided for

of

an external video monitor.

SCHILLER

SP-10

withdisposablemouthpiece,

PC

based

of

recorded

data

Iransmissiodreception.

data

management program

data.

to

be

carried out.

are

is

used

Page 1.2

SCHILLER

SERVICE

HANDBOOK

SP-I0

Spirometry

Issue

Unit

2

July

I998

Chapter

Operating Elements

I

Introduction

The main operating and connection modules of the

Keyboard

LCDScreen

Thermalprinter The printer provides hard copy of test results.
Right-hand Side Panel

Left-hand Side Panel

RearPanel

(cont.)

SPIROVIT

SP-10 are

as

follows:

The keyboard comprises the general function and control

data

keys, and the alpha-numeric keys for
The LCD screen displays the pulmonary traces and

operating and

the

display

entered

side

The
RS

serial

is installed, the disk drive

This

panel contains the paper

status

information. Under operator control

also

gives menu options

data

The display is folded

down

panel contains the Spirometry connector and the

COM~C~~IS.

When the floppy disk storage option

is

installed on

tray

entry.

certain

and

displays operator

when not

this

side

in

use.

panel.

and (below the paper

my) the program pack.
The

rear

panel

the

and

mains

mains

contains

connector

fuse.

the video monitor connector and

with

odoff switch, voltage selector

Page

1.3

Chapter

Operaing Elements

I

SCHILLER

SERVICE

SP-I0

HANDBOOK

Issue

Spirometry

2

July

Unit

I998

The

Keyboard

Alpha

Numeric

The

alphanumeric

Keyboard

keyboard

serves

as

a

normal

keyboard

for

data

input.

Page

1.4

SCHILLER

SERVICE

HANDBOOK

SP-I0

Spirometry

Issue

Unit

2

July

1998

%_

I

Chapter

1

Operating Elements

The

Keyboard

General

Purpose

The general purpose

(cont.)

Keys

keys

to

the

right

of

the alpha-numeric keypad,

Call

up

main

menu /return

to

Monitor mode

Return

to

previous menu

are

as

follows:

The direction keys are

used

to

move the cursor in order

Change setting / disable

command

Change setting / enable

to

make menu selections

command

Page

1.5

Chapter
Operating Elements

I

SCHILLER

SERVICE

SP-I0

HANDBOOK

Issue

Spirometry

2

July

Unit

I998

The

Keyboard

Control

and

The

Control

function key

(cont.)

Function

and

function

are

as

follows:

Keys

keys

are

situated

the

Switches

Switches the unit

Extend Paper Tray
Retract Paper Tray

unit

above

on

off

I

the

alpha

numeric

keyboard.

The

control

Print the best test result

all

Print

Select test result for print

Initiate data transmission

Initiate data storage

test results

and

Note:

Entry

Start selected
test

Stop printout
paper to start position

Slight

functional differences may

of

patient data

/

move

exist

in different modes

Initiate receive mode

of

general

the

settings

Enter details
Medical Assistant

Display
menu

Delete stored

measunnent

-.

Page

1.6

SCHILLER
SERVICE

HANDBOOK

SP-I0

Spiromtv

Issue

Unit

2

Jury

I998

Operating

Chapter

Eletnents

I

The

Keyboard

Test

Function

The function keys

and

their functions:

(cont.)

Keys

are

arranged

in

a

group

in

Display test reults

Flow

the middle

(against Volume)

of

keyboard. The

following

is

a

summary

of

the keys

Volume (against

Forced Vital Capactity test (Exhalation only)

Forced Vital Capactity test (Exhalation and Inhalation)

Vital Capacity

Minute Volume (volume in one minute)

Minute Volume (forced volume in

Reistance test (Option)

Test pre and post (medication)

Spo2

test (Option)

time)

one

minute)

Calibration

of

the

unit for the environmental conditions

Page

I.

7

Chapter
Operaring Elements

I

c..

SP-I0

SCHILLER

SERVICE

HANDBOOK

Spirometry

Issue 2 July

-

Unit

1998

Connector

Side

Panel

panels

The following are located

1. 1

X

RS-232C interface (Port

2. 1 X RS-232C interface

3. 1 X

RS-232C

4.

1

X

RS-422 interface (Port

5.

LCD contrast control

6.

Connection for SP-20, SP-110 or SP-150 flow sensor for lung function measurements (with
or without resistance test facility)

7.

SpO, connection

interface (Port

on

the side panel:

1)

(Port

2)

3)

4)

Page

1.8

SCHILLER

SERVICE

HANDBOOK

SP-I0

Spirometry Unit

Issue

2

July

I998

Chapter

Operating Elements

1

Connector

Back

Panel

panels

(cont.)

0

The

following connectors are located on

1.

Identification Plate

2.

MainsModule

3.

Connector

4.

Potential equalisation (ground) connection

5.

Local area network Connector (Option)

for

external video

0

the

back panel:

Page

1.9

Chapter

Operating

I

Elements

Connector panels (cont.)

SP-10

SCHILLER

Spirometry Unit

SERVICE HANDBOOK Issue

2

July

1998

~

-3

I

.I

.

Mains

Panel

The following are located on the

1.

Mains

fuse

(200

mA

slow) and

2.

Mains

connection

0

mains

voltage

panel:

selector

3.

Voltage

4.

Power on

indicator

I

off

switch

(mains)

Page

1.10

SCHILLER SP-I0 Spirometry Unit
SERVICE HANDBOOK Issue

2

July

1998

Chapter

Functional Description

2

SP-10 Basic Block

Brief Description
Overall

Power Supply

Processor

Interface Board

Functional

Power Supply
Processor and Memory
Printer Control

Graphics Control

Miscellaneous InputdOutputs

OdOg

Control and Low Battery Voltage Monitoring

+5V and

Battery Controller

CPU
Program Pack
Memory

Communications Controller
Thermal Print Head Controller
Programmable Printer Timer
Graphics Controller

Video
Power

Thermal Printer Control
Paper Carriage Control

kI2V

Board

-

LCD Converter

On

Reset

and

Description

Switching Regulators

Chapter

Functional Description

Contents

Interconnection Diagram

and

Beeper

2.2

2.3

2.5

2.5

2.5

2.5

2.5

2.6

2.8

2.8

2.8

2.9

2.11

2.11

2.11

2.11

2.12

2.12

2.13

2.13

2.13

2.13

2.14

2.14

2.15

2

Page

2.1

Chapter

2

Functional Description

i

SP-10

,MAINS

El-

SCHILLER SP-I

SERVICE

HANOBOOK

0

Spirometry Unit

Issue

2

July

-7

1

i

1998

SP-I

lorn

Page

2.2

&

SP-10

Basic Block

and

Interconnection

Diagram

RS-232

RS-422

VDEO

(a

SCHILLER

SERVICE

HANDBOOK

SP-I0

Spirometry

Issue 2 July

Unit

1998

Chapter

Functional Description

2

Brief

Description

The

SP-10

comprises the following boards and major functional

Power Supply

Processor Board

areas:

The power supply rectifies the mains input

all

the required voltages for the
rechargeable
the power for the printer
for about

The Processor Board
and contains the
unitRAMmemory.

Video

conversion circuit for the LCD
Program Pack containing the unit software

Print control, keyboard
circuits

The

Processor

following connectors:

Serial
transmission
for

12V

batteries. connected in series, provide

and

45

minutes,

signal generation circuits and the videoLCD

RS-232

data

evaluation and storage.

when mains is not present.

is

themaster control for

main

CPU, system timing circuits and the

This

boardalsocontains the following:

Board communicates externally over the

and

to

other units or

SP-10

enable

timing,

RS-422

to

electronics.

the

SP-10

and graphics control

interfaces for data

an

external computer

and

generates

to

operate

all

peripherals

Two

Interface Board

LCD/Keyboard Buffer Board

Video connector for connection of an external
monochrome
signal reflects the current LCD display.

Spirometry connector for connection of a spirometer

(SP110).

The Interface board contains the following:

Paper mark detection circuit
Thermal print head

Stepper motor control circuit

Control circuit for the paper tray dc motor

This board buffers the

the high voltage circuit for the LCD.

VGA

standard monitor. The digital video

data

buffers

LCD

and keyboard

data

and contains

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2.3

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SP-I0

Spirometry Unit

HANDBOOK

Issue

.

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2

July

1998

Functional

Chapter

Description

2

,.

.

'.

..

.

.,

...

Overall

Power Supply

Mains

The voltage selection switch connects the supply to

transformer. The ac voltage
+27V.
required by the

The power
is controlled by the following conditions:

0

0

0

Two 12V batteries, connected in series, directly provide the power for
provide power for the switching regulators when
battery

Processor

The SP-10 is controlled by a high speed, CMOS
bit address bus. The clock speed is 16.7 MHz. The processor works
gate array which
comprises
measured
unit software comprises 256kSytes

Functional

is applied

This

On signal from the keyboard
Off signal from the Microprocessor (Off key pressed on keyboard, 5V supply below 4.75V)
Overcurrent condition on the +12V

is

to

voltage

SP-I0

odoff

monitored by a battery charge monitor circuit.

and

Memory

is

256

kByte of static

data

and other variables and an EEPROM holds the operator selectable parameters. The

Description

the power supply viaamains filter,

is

then rectified to produce a resultant dc voltage

is

applied

electronics.

control circuit switches the supply voltage

custom programmed

to

regulator

RAM

circuits

rail

to

perform specific

and 2MByte of dynamic

of

EPROM

odoff

the

relevant winding

which generate

mains

is

not connected. The charge state

68OOO

processor with a 16-bit data bus and

contained on the program pack.

switch andavoltage selection switch.

of

the mains isolation

of

approximately

all

of

the dc power supplies

to

the regulators. The power odoff

the

thermal printer, and

of

the

23-

in

conjunction with adedicated

tasks.

RAM.

The working

The dynamic

RAM

RAM

memory

holds the

The keyboard

Keyboard Interface circuit When a key
board for interpretation

Printer

Control

The Thermal Print Head
The print head controller serialises the patallel
The Timer circuit controls
out.

The printer motor speed

is

a matrix style circuit which is periodically scanned by the processor via the

is

pressed the key information is clocked to the processor

by

the master CPU.

is

controlled by the Print Head Controller circuit and the Timer circuit.

data

written by the CPU into a

how

long current is applied to the head, and thus the intensity

is

controlled by the master CPU

via

the Timer circuit.

16-bit FIFO

of

the print-

register.

Graphics Control

The display
The graphics processor
to

an

/

data

LCD signal

is

generated in the graphics processor circuit under the control of the master CPU.

outputs

a VGA standard serial video signal. The video signal is converted

by

the Video - LCD circuit.

Page

2.5

Chapter

Functional Description

2

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SERVICE

SP-I0

HANDBOOK

Spirometry Unit

Issue

2

July

1998

I

Overall

Miscellaneous

Spirometry

The

clockedintoashiftregkterin

on the

Video

The
connector reflects

Serial

The

sion
signal level compatibility with
required

Functional

Description

Inputs/Outputs

serial

input

signal

from

the spirometer

theinterfacecircuitand, whenenabledthe

data

bus

for

interpretation by

the

Connector

video

connector outputs the

the

Same

serial

video signal generated by

data

as

that displayed on the LCD.

Ports

Communications Controller contains

and

reception

or

of

data

The Communications Driver circuit contains interface circuits

RS-232.

when longer cable lengths

The

are

(cont.)

is

connected to the interface circuit. The serial

datais

present din parallel

master

CPU.

the

USARTS

RS-422

used.

which generate

connector

is

graphics

serial

used when high

processor.

signals

for

data

The video

the

transmis-

to
rates

data

is

ensure

are

'/

I

4

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2.6

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SERVICE

HANDBOOK

SP-I0

Spirometry

Issue

Unit

2

July

I998

Chapter

Functional Description

2

Page

2.7

...

Chapter

2

Functional

Power

Mains

filter incorporates
switch-on. After a few seconds the resistor
supplied. The voltage switch ensures

is

The transformed ac input
approximately
generate the

The switching regulator comprises a pulse widthregulator chip

FET(Ql).TheFETactsasaswitch

D4

The pulse width set by
by the feedback on the current sense

VRI).

An

exceeds
The overvoltage protection circuit monitors the output voltage viaQ3 which

mains

switching regulator is cut

Description

Supply

is applied

used for

and output filter

The frequency

overvoltage protection circuit cuts the voltage

+35V.

is

connected

to

the line filter via the onfoff switch and

a

tempexature variable resistor

warms,

that

the correct

the

mains voltage applied.

is

full-wave rectified by a bridge rectifier

+22V.

The rectified voltage

+uB

supply

.

tocontrolthecurrentflow inloadingcoilT1 andthus, viadiode

((289,

C13 etch regulate

U1.

is determined by

(via

is

between

The overvoltage protection circuit is formed by Q30 and associated components.

to

the

40kHz

unit.

When

by

switching off Q5.

is

the

an

Q1 power

and

5001rHz.

an

overvoltage

SCHIUR

SERVICE

two

500

mA,

to

ensure that

the resistance drops and normal power is

primary

used by a switching regulator and filter circuit

the

Winding

Wl)

voltage of

oscillator circuit

FET),

+UB.

(C8

and the voltage feedback from

to

the power supply

is

detected,

the

HANDBOOK

slow-blow fuses. The line

current

of

the isolation transformer

to

produce a dc voltage of

which controls a power

and

C9)

if

+UB

is

dc input voltage

SP-I0

Spirometry Unit

Issue

is

limited

at

initial

MOS

which is controlled

+UJ3

(via

output voltage

switched on when

to

the

UB

2

to

July

I998

A

short

circuit protection circuit formed by
undervoltage which indicates high current and
detected

A

too low (in effect ensuring

circuit uses
uses the same tapping.

On/Off

The supply for the
of the odoff control circuit is Q1
and then latched by the
the processor
unit is switched off.

The voltage
voltage drops below
overcurrent or overvoltage

Q5

is

switched off.

low current detector circuit

that

a

tapping from T1

Control and

+5

Low

and

+12V

OFF

goes

low, Q11 is switched off, the power to the switching regulators

of

the battery is monitored by comparator

18.8V

(battery voltage low)

(+12V)

is

incorporated to monitor the output current and ensure that it

the output voltage

to

monitor the current. The overcurrent detector ( ZCUDE of

Battery Voltage Monitoring

regulators

1.

It

is

initially switched on by the

signal (logic

1)

is detected, Qll is switched off via

+5V and k12V Switching Regulators

The

5V

and

12V

step down switching regulatorsboth function

given here is for the 12V regulator.

Q4,

C2

and associated components, monitors for

a

possible short circuit. If an undervoltage is

does

not exceed

is

controlled by an onfoff control circuit. The switch

from

the

Microprocessor. When the

U6C

Q11

is switched off. In the same manner

+27V).

The low current detector

ON

signal from the keyboard,

(monitoring the

+US

powerrail).

OFF

signal from

is

cut, and the

U7B.

in

the samemanner. The description

is

U1)

If

if

not

the

an

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2.8

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1

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Power

SP-I0

Spirometry

HANDBOOK

Supply

PowerFETsQ9 andQ10formapush-pull circuitwhichswitchesthe supply toloadingcoilT?,.The

power

FET

control circuit is formed by U5A

feedback

FETs

Secondary windings of T2 provide voltages of 13V and 25V. These

regulators to produce the regulated -12V

distribution

is

formed

(via

is

I

Unit

Issue

2

July

1998

(cont.)

R47)

to

control the switching oscillator

by

U4.

given on the following table.

IJlJlJl

Functional Description

which

monitors the

W5B,

and

-18V supplies respectively. The power supply

ac

feedback (via C24) and

C17). A gate

are

booster

used by linear voltage

for

the power

Chapter

dc

2

Battery

Controller

The battery controller circuit measures the ChargeJdischarge current
CPU to calculate the capacity of the battery. The battery controller circuit

LED

to give a visual indication when the battery is charging and when the

power.

The negative side

an

gives
amplifiers U15C and U15A form a current rectification

which is fed to a current frequency convener Circuit. The current/frequency converter provides
frequency output that
of the current/frequency converter clocks
discharge current and chargeldischarge time of the battery, and thus
battery.

The frequency

mately 31.3Hz.
The counter counts up when the banery is discharging and

count is converted
charge state
is

The counter is preset when the battery is
which acts
Via Q23, the

(via

indication to the counter of the current direction ie charging or discharging. Operational

OV.

Q24)

of

the battery is connected

is

directly proportional to the battery charge or discharge current. The output

of

the currenrffrequency converter at a charge or discharge rate of 1A is approxi-

to

an

analog

value by

of

the battery. When the battery is

as

acurrent sense and

PRESET

to

light

signal goes low and the counter is preset to

the battery

goes

LED

when the battery is charging.

to

acurrent sense circuit.

and

an

up/down counter which is used

down

D/A

converter U13 for

fully

charged ie counter

fully

charged. This

high when the charging rate of the battery is less than IOmA.

is

of

the battery

also

Operational

measurement circuit the output

to

the

actual capacity

when the battery

use

by

the CPU in determining the

all

’1’s

carried out by a comparator U14C

all

-1’s. This circuit is

to

enable the

controls the battery

unit

is using battery

amplifier U15B

indicate the charge/

is

charging. The

the DAC output

also

of

used

of

a

the

Page

2.9

1

RS-232

PORT

RS-232

PORT 2

3

AS-232

PORT

PORT

RS-422

VIDEO

CONNECTOR

Diagram

Block

Functional

-

Processor

1

SP-