Mindray Datascope Accutorr V User manual

Service Manual

Accutorr® is a registered trademark of Mindray DS USA, Inc.

Masimo SET

Mindray

Nellcor

is a U.S. registered trademark of Tyco International Ltd.

SmarTemp

is a U.S. registered trademark of Masimo Corp.

is a trademark or a registered trademark of Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

™

is a trademark of Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

Accutorr V Service Manual 0070-10-0702

Tabl e of C on te nt s

Preface..........................................................................................................................................................v

Warnings, Cautions, and Notes .......................................................................................................................vii

Warnings ......................................................................................................................................................vii

Cautions ........................................................................................................................................................ viii

Notes ............................................................................................................................................................ x

Safety Designations......................................................................................................................................... x

Product Limitations ..........................................................................................................................................xi

Unpacking ..................................................................................................................................................... xi

Symbols and Descriptions ................................................................................................................................ xii

Theory of Operation ......................................................................................................... 1 - 1

Introduction.................................................................................................................................................... 1 - 2

Controls and Indicators....................................................................................................................................1 - 2

System Overview ............................................................................................................................................1 - 2

Hardware Structure.........................................................................................................................................1 - 4

Main Board ............................................................................................................................................ 1 - 5

Power Board........................................................................................................................................... 1 - 6

Key and Displays Board ...........................................................................................................................1 - 7

Parameter Boards ....................................................................................................................................1 - 8

Module .................................................................................................................................1 - 8

SpO

NIBP Module .................................................................................................................................. 1 - 9

Optional Temperature Module .......................................................................................................... 1 - 9

Recorder ................................................................................................................................................1 - 10

Bar Code Scanner ................................................................................................................................... 1 - 11

Specifications.................................................................................................................... 2 - 1

Introduction.................................................................................................................................................... 2 - 2

NIBP Measurement .........................................................................................................................................2 - 2

Blood Pressure ........................................................................................................................................2 - 2

Static Accuracy ....................................................................................................................................... 2 - 2

Maximum Cuff Pressure ............................................................................................................................2 - 2

Cuff Inflation ........................................................................................................................................... 2 - 3

Maximum Leakage ..................................................................................................................................2 - 3

Deflation Rate .........................................................................................................................................2 - 3

Update Period.........................................................................................................................................2 - 3

Initial NIBP Pressure Setup and Range........................................................................................................2 - 3

NIBP Measurement Cycle................................................................................................................................. 2 - 4

Cuff Inflation Time.................................................................................................................................... 2 - 4

Cuff Pressure Automatic Check Algorithm ...........................................................................................2 - 4

Automatically Adjusted Inflation Value after First Measurement...................................................................... 2 - 5

Pulse Rate............................................................................................................................................... 2 - 5

Measurement ........................................................................................................................................2 - 6

SpO

DPM SpO2 Module Performance............................................................................................................... 2 - 6

SpO2 ............................................................................................................................................ 2 - 6

Pulse Rate ....................................................................................................................................... 2 - 6

Alarm setting range .........................................................................................................................2 - 6

Masimo MS-2013 SpO

.............................................................................................................................................2 - 7

SpO

Pulse Rate ....................................................................................................................................... 2 - 8

Alarm Setting Range ........................................................................................................................ 2 - 8

Nellcor NELL-3 SpO

SpO2 ............................................................................................................................................ 2 - 9

Pulse Rate ....................................................................................................................................... 2 - 9

Alarm Setting Range ........................................................................................................................ 2 - 9

Performance........................................................................................................ 2 - 7

Performance............................................................................................................. 2 - 9

Accutorr V Service Manual 0070-10-0702 i

Tabl e of C on te nts

Temperature...................................................................................................................................................2 - 10

Display Area, Indicator, and Controller .............................................................................................................2 - 10

Display Area...........................................................................................................................................2 - 10

LCD ...............................................................................................................................................2 - 10

7-Segment Digit Display ...................................................................................................................2 - 10

Monochrome LED Indicator ............................................................................................................... 2 - 10

Power Indicator ...............................................................................................................................2 - 11

Overlay and labeling............................................................................................................................... 2 - 11

Alarm Lamp ............................................................................................................................................ 2 - 11

Keys ......................................................................................................................................................2 - 12

Patient Cable Connectors .........................................................................................................................2 - 13

Audio Indicator .............................................................................................................................................. 2 - 13

Pulse Tone Function.................................................................................................................................. 2 - 13

Multiple-Level Volume............................................................................................................................... 2 - 13

Real-time Clock............................................................................................................................................... 2 - 13

Standby Mode ............................................................................................................................................... 2 - 14

Alarm Information ........................................................................................................................................... 2 - 15

Basics ....................................................................................................................................................2 - 15

Alarm Notification ................................................................................................................................... 2 - 15

Audio Alarm Pause, Audio Alarm Off, and Audio Alarm Silencing ................................................................ 2 - 15

Configuration management.............................................................................................................................. 2 - 15

Barcode scanner.............................................................................................................................................2 - 15

Troubleshooting................................................................................................................ 3-1

Introduction.................................................................................................................................................... 3 - 2

Part Replacement ............................................................................................................................................ 3 - 2

Monitor Status Check ......................................................................................................................................3 - 2

Technical Alarm Check ....................................................................................................................................3 - 3

Troubleshooting Guide ....................................................................................................................................3 - 4

Power On/Off Failures ............................................................................................................................3 - 4

Display Failure ........................................................................................................................................ 3 - 4

LED Digital Display and Indication Lamp Failure ..........................................................................................3 - 4

Alarm Problems ......................................................................................................................................3 - 5

Key Failure ............................................................................................................................................3 - 5

Recorder Failures.....................................................................................................................................3 - 6

Interface Failures ....................................................................................................................................3 - 6

Power Supply Failures ..............................................................................................................................3 - 6

Network Related Problems .......................................................................................................................3 - 7

Software Upgrade Problems ....................................................................................................................3 - 8

Bar Code Scanner Failures .......................................................................................................................3 - 8

NIBP Measurement Failures ......................................................................................................................3 - 9

Measurement Failure ...................................................................................................................... 3 - 9

SpO

Temperature Measurement Failures ...........................................................................................................3 - 9

Repair and Disassembly ................................................................................................... 4 - 1

Tools ............................................................................................................................................................. 4 - 2

Preparation for Disassembly ............................................................................................................................. 4 - 2

Disassembly .................................................................................................................................................. 4 - 3

Separating the Front and Rear Halves of the Monitor ..................................................................................4 - 3

Disassembling the Front Housing Assembly ................................................................................................4 - 6

Removing the Main Rack Assembly............................................................................................................ 4 - 8

Removing NIBP Module ...........................................................................................................................4 - 11

Removing the Main (CPU) Board ..............................................................................................................4 - 12

Removing the Power Board.......................................................................................................................4 - 13

ii 0070-10-0702 Accutorr V Service Manual

Tabl e of C on te nt s

Removing the Battery Connector Assembly..................................................................................................4 - 13

Removing the Fan and Speaker .................................................................................................................4 - 14

Removing the Power Socket .....................................................................................................................4 - 15

Disassembling the Temperature Module......................................................................................................4 - 16

Disassembling SpO

Disassembling a DPM SpO

Disassembling a Masimo SpO

Disassembling a Nellcor SpO

Modules................................................................................................................... 4 - 17

module ..................................................................................................4 - 17

module ............................................................................................. 4 - 17

module ..............................................................................................4 - 18

Disassembling the NIBP Module ................................................................................................................4 - 19

Removing the NIBP Pump ................................................................................................................. 4 - 19

Removing the NIBP Dump Valve ........................................................................................................ 4 - 19

Removing the NIBP Bleed Valve ........................................................................................................ 4 - 20

Parts ................................................................................................................................5 - 1

Main Assembly...............................................................................................................................................5 - 2

Front Assembly ............................................................................................................................................... 5 - 3

Rear Housing Assembly ................................................................................................................................... 5 - 7

Main Bracket Assembly ...................................................................................................................................5 - 8

NIBP Assembly (Pump M6Q-100003- - -) ........................................................................................................... 5 - 10

NIBP Assembly (Pump 082-000056-00) ............................................................................................................5 - 13

Temperature Module Subassembly ....................................................................................................................5 - 16

Temperature Power Module Subassembly ..........................................................................................................5 - 18

Test and Calibration.......................................................................................................... 6 -1

Introduction.................................................................................................................................................... 6 - 2

Test Report..............................................................................................................................................6 - 3

Recommended Frequency .........................................................................................................................6 - 3

Visual Test...................................................................................................................................................... 6 - 4

Power-on Test ................................................................................................................................................. 6 - 4

NIBP Calibration............................................................................................................................................. 6 - 4

NIBP Accuracy Test......................................................................................................................................... 6 - 8

NIBP Leakage Test ...................................................................................................................................6 - 9

Test......................................................................................................................................................6 - 12

SpO

Test Under Normal Conditions .........................................................................................................6 - 12

SpO

Test in Motion Mode....................................................................................................................... 6 - 12

SpO

Summary of Test Methods.........................................................................................................................6 - 13

DPM SpO

Nellcor SpO

Masimo SpO

Testing the Optional Temperature Module.......................................................................................................... 6 - 14

Nurse Call Performance Test ............................................................................................................................6 - 16

Bar Code Scanner Test ....................................................................................................................................6 - 18

Electrical Safety Tests ...................................................................................................................................... 6 - 20

Enclosure Leakage Current Test .................................................................................................................6 - 20

Earth Leakage Current Test .......................................................................................................................6 - 20

Patient Leakage Current Test .....................................................................................................................6 - 21

Patient Auxiliary Leakage Current Test........................................................................................................ 6 - 21

Recorder Check ..............................................................................................................................................6 - 22

Software upgrade...........................................................................................................................................6 - 23

..................................................................................................................................... 6 - 13

................................................................................................................................. 6 - 13

Accutorr V Service Manual 0070-10-0702 iii

Tabl e of C on te nts

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iv 0070-10-0702 Accutorr V Service Manual

Preface Introduction

Preface

This manual provides detailed information about the assembling, disassembling, testing, and troubleshooting of the equipment to support effective troubleshooting and repair. It is not intended to be a comprehensive, in-depth explanation of the product architecture or technical implementation. Observance of the manual is a prerequisite for proper equipment maintenance and prevents equipment damage and personnel injury.

Refer to the Accutorr V Operating Instructions: P/N 0070-00-0699-XX for information for operating this instrument.

This manual is based on the maximum configuration. Therefore, some contents may not be applicable. For questions, contact Service.

This manual is for biomedical engineers, authorized technicians, or service representatives responsible for troubleshooting, repairing, and maintaining the monitors.

Contents of this manual are subject to change without prior notice.

A password is required to access the service mode. The service password is 321.

The Accutorr V configurations are:

• Accutorr V with Nellcor® Pulse Oximetry—

includes NIBP, Nellcor SpO

• Accutorr V with Nellcor

includes NIBP, Nellcor SpO

a Trend Display, and Recorder

Pulse Oximetry and SmarTemp™—

SmarTemp, a Trend Display, and Recorder

• Accutorr V with Masimo SET® Pulse Oximetry—

includes NIBP, Masimo SpO2, a Trend Display, and Recorder

• Accutorr V with Masimo SET® Pulse Oximetry and SmarTemp™—

includes NIBP, Masimo SpO2, SmarTemp, a Trend Display, and Recorder

• Accutorr V with DPM Pulse Oximetry—

includes NIBP, DPM SpO2, a Liquid Crystal Display (LCD), and Recorder

• Accutorr V with DPM Pulse Oximetry and SmarTemp™—

includes NIBP, DPM SpO

SmarTemp, a Liquid Crystal Display (LCD), and Recorder

All Accutorr V configurations can be upgraded with a barcode scanner.

Masimo Patents: This device (MASIMO SpO2 Module) is covered under one or more of the following U.S. Patents 5,758,644, 5,823,950, 6,011,986, 6,157,850, 6,263,222, 6,501,975, and other applicable patents listed at: www.masimo.com/patents.htm. Possession or purchase of this device does not convey any express or implied license to use the device with replacement parts which would, alone, or in combination with this device, fall within the scope of one or more of the patents relating to this device.

Accutorr V Service Manual 0070-10-0702 v

Introduction Preface

Nellcor Patents: This device (Nellcor SpO2 Module) is covered under one or more of the following U.S. Patents Patent No. 5,485,847, 5,676,141, 5,743,263, 6,035,223, 6,226,539, 6,411,833, 6,463,310, 6,591,123, 6,708,049, 7,016,715, 7,039,538, 7,120,479, 7,120,480, 7,142,142, 7,162,288, 7,190,985, 7,194,293, 7,209,774, 7,400,919, and 7,212,847. Possession or purchase of this device does not convey any express or implied license to use the device with replacement parts which would, alone, or in combination with this device, fall within the scope of one or more of the patents relating to this device.

vi 0070-10-0702 Accutorr V Service Manual

War nin gs, Ca uti ons , and Note s Introduction

Warnings, Cautions, and Notes

Read and adhere to all of the warnings and cautions listed throughout this manual.

A WARNING is provided to alert the user to potentially serious outcomes (death, injury or serious adverse events) to the patient or the user.

A CAUTION is provided to alert the user that special care should be taken for the safe and effective use of the device. They will include actions to be taken to avoid effects on patients or users that will not be potentially life threatening or result in serious injury, but about which the user should be aware.

A NOTE is provided when additional general information is available.

Warnings

WAR N I N G : I n t e r n al Electrical Sh o c k H azard - This unit does not contain

any user-serviceable parts. Do not remove instrument covers. Refer servicing to qualified personnel. When the integrity of the protective earth conductor, in the installation or its arrangement, is in doubt, the equipment should be operated from its internal battery. Observe all CAUTION and WAR N I N G l a b e ls on the unit.

WAR N I N G : P o s s i ble explosion haz a r d . Do not operate m a c h i ne near

flammable anesthetic agents or other flammable substances. Do not use flammable anesthetic agents (i.e., ether or cyclopropane.)

WAR N I N G : A l w ays place the u n i t o n a flat, rigid surface or onto a

WAR N I N G : To e n s u r e proper p e r fo r m an ce and safety an d t o p revent

WAR N I N G : U s e only cu f f s with ap p roved quick connect type connectors.

WAR N I N G : T h e A c c utorr V is not i n t e n d e d for use in a m a g n e t i c

WAR N I N G : D a n g e r of explosion i f battery is incorrectly replaced.

WAR N I N G : D o n o t u s e a damaged or broken unit or accessory.

Mindray approved stable mounting bracket.

the voiding of the warranty, only use authorized parts and accessories with the Accutorr V. Use of unauthorized accessories may result in erroneous readings.

resonance imaging (MRI) environment and may interfere with MRI procedures.

Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturers instructions and local regulations. Batteries used in this de vice may present a risk of fire or chemical burn if mistreated. Do not incinerate battery, possible explosion may occur.

WAR N I N G : O p e r a tion of the A cc u torr V below the m i n i m um amplitude

or value of patient physiological signal may cause inaccurate results.

Accutorr V Service Manual 0070-10-0702 vii

Introduction Cautions

WAR N I N G : U s e of a c cessories, transducers, and cables other than those

WAR N I N G : P e r f o r m t h e decontaminat i o n o r cleaning pro c ess with the

WAR N I N G : E l e c t ri cal safety tes t s a re a proven means of verifying the

WAR N I N G : C o m m e rcially availab l e t e s t equipment such as a safety

WAR N I N G : E l e c t ri cal safety tes t s s h ould meet the r e q u i r ements of the

WAR N I N G : T h e s e electrical saf e t y t ests do not su p e r s e d e local

WAR N I N G : A l l d evices using the A C m a i n s and connected t o medical

specified in the manual may result in increased Electromagnetic Emissions or decreased Electromagnetic Immunity of the Accutorr V. It can also cause delayed recovery after the discharge of a cardiac defibrillator.

unit powered down and power cord removed.

electrical safety of the monitor. They are intended for determining potential electrical hazards. Failure to identify these hazards in a timely manner may cause personnel injury.

analyzer can be used for electrical safety tests. Verify that the test equipment can be safely and reliably used with the monitor before use. The service personnel should acquaint themselves with the use of the test equipment.

latest editions of EN 60601-1 and UL 60601.

requirements.

equipment within patient environments must meet the requirements of the IEC 60601-1-1 medical electrical systems standard and should be put under electrical safety tests at the frequency recommended for the monitor.

Cautions

CAUTION: Observe extreme caution when a defibrillator is in use. Do

not touch any part of the patient, table, or monitor when a defibrillator is in use. The Accutorr V should not be used adjacent to or stacked with other equipment. If adjacent or stacked use is necessary, the Accutorr V should be observed to verify normal operation in the configuration in which it will be used.

CAUTION: The unit should be checked periodically for obstructed vents.

CAUTION: At the end of their life, dispose of the Accutorr V,

CAUTION: When equipped with Nellcor

CAUTION: When equipped with MASIMO

If an obstruction is found, refer the unit to qualified service personnel.

accessories, and single use supplies in accordance with local regulations. Dispose of packaging waste in accordance with local regulations.

oxygen transducers including Nellcor dedicated adhesive sensors. Use of other oxygen transducers may cause improper oximeter performance.

oxygen transducers including MASIMO LNOP

LNCS

patient dedicated adhesive sensors and MASIMO PC Series Patient Cable. Use of other oxygen transducers may cause improper Oximetry performance.

SpO2, use only Nellcor®

Oxisensor® patient

SpO2, use only MASIMO®

and MASIMO

viii 0070-10-0702 Accutorr V Service Manual

Cautions Introduction

CAUTION: Inaccurate readings may be caused by incorrect sensor

CAUTION: Route cables neatly. Ensure cables, hoses, and wires are

CAUTION: When cleaning sensors, do not use excessive amounts of

CAUTION: Recharge the Lithium ion battery while in the unit at room

application or use; significant levels of dysfunctional hemoglobins (i.e. carbohemoglobins or methemoglobin); or intra-vascular dyes such as indocyanine green or methylene blue; exposure to excessive illumination, such as surgical lamps (especially ones with a Xenon light source), bilirubin lamps, fluorescent lights, infrared heating lamps, or direct sunlight; excessive patient movement; venous pulsations; electro-surgical interference; and placement of a sensor on an extremity that has a blood pressure cuff, arterial catheter, or intra-vascular line.

kept away from patient’s neck to avoid strangulation. Keep floors and walkways free of cables to reduce risk to hospital personnel, patients, and visitors. If the sensor or patient cable is damaged in any way, discontinue use immediately.

liquid. Wipe the sensor surface with a soft cloth, dampened with the cleaning solution. To prevent damage, do not soak or immerse the sensor in any liquid solution. DO NOT ATTEMPT TO STERILIZE .

temperature. If using the Accutorr V in a hot environment, the Lithium ion battery may not charge when the unit is connected to the AC mains.

CAUTION: Remove the battery if the Accutorr V is not used for an

extended period of time.

CAUTION: The Communications Connectors on the Accutorr V are only

for use with IEC 60601-1-1 compliant equipment.

CAUTION: Never place fluids on top of this monitor. If fluid spills on the

unit, wipe clean immediately and refer the unit to qualified service personnel.

CAUTION: Before disassembling the monitor, eliminate static charges.

CAUTION: Properly connect the cables or wires when reassembling the

CAUTION: All tests should be performed by qualified personnel only.

CAUTION: Disconnect the monitor from the patient and make sure that

When disassembling the parts labeled with static-sensitive symbols, wear electrostatic discharge protection such as antistatic wristband or gloves. Follow the correct sequence to disassemble the monitor. Otherwise, the monitor may be damaged permanently. Disconnect all the cables before disassembling any parts. Take care not to damage any cables or connectors.

monitor to avoid short circuit. When assembling the monitor, select proper screws. If the wrong size screw is tightened by force, the monitor may be damaged and the screw or the part may not function as expected.

important data is saved before upgrading the monitor.

CAUTION: Do not shut down or power off the equipment when

upgrading the bootstrap program. Otherwise, it may cause the equipment to break down.

Accutorr V Service Manual 0070-10-0702 ix

Introduction Notes

CAUTION: Program upgrades should be performed by qualified

service personnel only.

Notes

NOTE: The Accutorr V should be operated only by trained and

qualified personnel.

NOTE: Use disposable and single use accessories only once.

NOTE: Place the equipment in a location where the screen can

easily be seen and the operating controls can easily be accessed.

NOTE: The instructions in this manual are based on the maximum

configuration.

NOTE: The optional Temperature module kit must be installed only

by trained personnel, and proper ESD prevention methods must be followed.

NOTE: Only devices specified by Mindray DS USA, Inc. shall be

connected the RS-232 port

NOTE: When the RS-232 connector is used for DIAP, barcode power

must be set to OFF.

NOTE: Disconnect the Accutorr V from the mains to isolate it from

the mains power during an emergency.

Safety Designations

Safety designations per IEC 60601-1 Standard:

Type of protection against electric sho ck Class 1 with internal electric power source.

Where the integrity of the external protective earth (ground) in the installation or its conductors is in doubt, the equipment shall be operated from its internal electric power source.

Degree of protection against electric shock Monitor - Type B applied part.

NIBP - Type BF defibrillation protected applied part. SpO

- Type BF protected applied part.

Temp - Type BF protected applied part.

Supply Connection 100 – 240 V

50/60 Hz

0.85 – 0.5 A

Mode of Operation Continuous

x0070-10-0702Accutorr V Service Manual

Product Limitations Introduction

Protection Against Hazard of Explosion Not Protected (Ordinary)

Protection Against Ingress of Liquids IPX1

Degree of Electrical Connection Between Equipment and Patient

Degree of Mobility Portable

Equipment designed for direct electrical and non-electrical connection to the patient.

Product Limitations

Non-invasive blood pressure (NIBP) accuracy depends on the application of the proper cuff size. See Chapter 3.0 of the Operating Instructions for detailed information.

The Accutorr V will not operate effectively on patients who are experiencing convulsions or tremors.

The Accutorr V is a portable device intended for intra-hospital use.

If the pressure cuff is not placed at the patient’s heart level, the NIBP measurement may be subject to error, due to the hydrostatic effect.

The pulse rate data displayed on the Accutorr V is computed from the measurement of peripheral pulses (peripheral pulses taken only during a measurement cycle). The rate measured by the Accutorr V may differ from the rate of an ECG monitor. This is because the ECG is an electrical signal that may not always result in a peripheral pulse.

Administration of certain vasoconstrictor drugs (for example, norepinephrine), may reduce peripheral perfusion to a level that prevents the Accutorr V from taking pulse rate measurements.

Arterial compression, tricuspid regurgitation, or other conditions may reduce perfusion to a level that prevents the Accutorr V from taking pulse rate measurements.

The presence of arrhythmias may increase the time required to complete a measurement and may extend this time so that a measurement cannot complete.

The Accutorr V is not intended for use during CPR. The monitor uses an oscillometric technique based on normal peripheral circulation to compute blood pressure.

Unpacking

Remove the instrument from the shipping carton and examine it for signs of shipping damage. Save all packing materials, invoice, and bill of lading. These may be required to process a claim with the carrier. Check all materials against the packing list. Contact the Customer Service Department (800) 288-2121 or (201) 265-8800 for prompt assistance in resolving shipping problems.

NOTE: The Accutorr V should only be shipped in its original

Accutorr V Service Manual 0070-10-0702 xi

packing materials to avoid shipping damage.

Introduction Symbols and Descriptions

SpO

REF

Symbols and Descriptions

SYMBOL DESCRIPTION SYMBOL DESCRIPTION

Attention, Consult Accompanying Documents / Refer to Manual

Type BF Equipment

Equipotentiality Equipotential grounding

Alternating Current (AC) Adult

Predictive Thermometer Connector

SpO

Connector Neonate

Electrical connectors Operating on battery power

Battery Manufacturer

Connected to AC mains

Defibrillator-proof Type BF Equipment

Pediatric/Child

NIBP Connector

Power On/Off – Standby Recycle

Serial number Up key

Part Number Confirm key

Patient Information key Down key

Main menu key Deflate Cuff key

xii 0070-10-0702 Accutorr V Service Manual

Symbols and Descriptions Introduction

SYMBOL DESCRIPTION SYMBOL DESCRIPTION

Set alarms key Patient Size key

Start NIBP key Alarm Silence key

Display Tabular Trends/Pleth Wav e

NIBP interval key SP1

NC1 Nurse Call connector

RS-232 connector (Serial Port 1)

Print key (front panel) CS1 Network connector

Print key (recorder)

Alarm Silenced indicator on LCD display

Alarm Disabled indicator on LCD display

Audio Alarm Off indicator on LCD display

Classified by Underwriters Laboratories Inc. with respect to electric shock, fire and mechanical hazards, only in accordance with UL 60601-1, CAN/CSA C22.2 NO.601-1, IEC 60601-1-1, IEC 60601-2-30, IEC 60601-2-49.

Accutorr V Service Manual 0070-10-0702 xiii

Introduction Symbols and Descriptions

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xiv 0070-10-0702 Accutorr V Service Manual

1.0

Theory of Operation

Introduction.................................................................................................... 1-2

Controls and Indicators ................................................................................... 1-2

System Overview............................................................................................ 1-2

Hardware Structure......................................................................................... 1-4

Accutorr V Service Manual 0070-10-0702 1 - 1

Introduction Theory of Operation

MAIN UNIT

RECORDER

BATTERY

CHAMBER

TEMP

MODULE

CHAMBER

MAIN BOARD

POWER BOARD

KEY &

DISPLAY

PARAMETER

BOARDS

RECORDER

BOARD

BARCODE SCANNER

SYSTEM

SOFTWARE

PARAMETER

SOFTWARE

UPGRADE

SOFTWARE

GATEWAY

SOFTWARE

BARCODE SCANNER

SUPPORT

SYSTEM

HARDWARE

MECHANICAL

SOFTWARE

1.1 Introduction

The Accutorr V monitors the following patient vital signs: non-invasive blood pressure (NIBP), pulse oxygen saturation (SpO2), pulse rate (PR), and temperature (Temp) for a single adult, pediatric, or neonatal patient. Temperature is measured using the optional Temperature Module.

1.2 Controls and Indicators

For information on controls, connectors, and indicators, refer to the Accutorr V Operating Instructions, Part Number 0070-10-0699-02.

1.3 System Overview

FIGURE 1-1 shows the relationship of the Accutorr V monitoring system’s mechanical, hardware, and software components.

FIGURE 1-2 shows the Accutorr V monitoring system’s PC board connections.

1 - 2 0070-10-0702 Accutorr V Service Manual

FIGURE 1-1 System Mechanical, Hardware, and Software Overview

Theory of Operation System Overview

J10

J8 J9

J2 J3 J4 J5

J11 J12 J13

P3 P4

J4 J5

POWER

RECORDER

SpO

TEMP

NIBP

ISOLATION

POWER BOARD

MAIN BOARD

PAR AM ETER RECE PTAC LE

KEY & DISPLAY

BOARD

INLET

FAN

BATTERY

LCD

BDM PORT

SPEAKER

NETWORK CONNECTOR

NURSE CALL

RS232

ISOLATION

POWER BOARD

FIGURE 1-2 The System PCBA Connections

Accutorr V Service Manual 0070-10-0702 1 - 3

Hardware Structure Theory of Operation

ACCUTORR V

ISOLATION

POWER BOARD

TEMP MODULE

SpO

MODULE

NIBP MODULE

FAN

RECORDER

SPEAKER

KEY &

DISPLAY

BOARD

BATTERY

NURSE CALL

RS232

ETHERNET

MAIN BOARD

POWER BOARD

COMMUNICATIONS

/POWER SUPPLY

ISOLATION

POWER BOARD

POWER SUPPLY

LED &

KEY

LCD

COMMUNICATIONS

/POWER SUPPLY

1.4 Hardware Structure

FIGURE 1-3 shows the Accutorr V’s Hardware Structure. The core of the system is the main board, which supplies power for all parameter modules. The parameter modules directly communicate with the main board. The the main board processes measurements and the status of all modules, and displays them through the key and display board.

FIGURE 1-3 The Accutorr V’s Hardware Structure

NOTE: The SpO2 isolation power board does not apply to models

with DPM Pulse Oximetry.

1 - 4 0070-10-0702 Accutorr V Service Manual

Theory of Operation Hardware Structure

CPU

WATCHDOG

PHY RTL8201

RTC E2 PROM

RS232 IC

FLASHSDRAM

LINEAR POWER

AUDIO PROCESS

CIRCUIT

FPGA

NURSE CALL

ETHERNET

SPEAKER

3.3V LCD

1.5V

5.0V 12V LED KEY

SERIAL PORT 0

RS232

SERIAL PORT 1:

NIBP

SERIAL PORT 2:

SpO

SERIAL PORT 3:

TEMP

SERIAL PORT 4:

RECORDER

1.4.1 Main Board

FIGURE 1-4 shows the main board, which provides resources and support for the overall system. It controls the LCD, LED, keyboard, speaker, and recorder. It also communicates with parameter modules and connectors. The main board also controls communication with the speaker, the recorder, and all external connectors.

FIGURE 1-4 Main Board Principle Diagram

The main board communicates with all parameter modules and the recorder through an FPGA extended serial port.

The main board supplies information using FPGA to the key and display board. It drives the display, detects the keys, and implements the user interface.

The main board controls the alarm indicator using FPGA.

The main board controls the speaker to give audible alarms, key tones, and Pitch Tone.

The main board provides the nurse call connection, network connection, and R232 connection.

The real-time clock is implemented by the RTC chip. The RT clock is powered by the AC mains, battery, or button cell on the main board. The button cell ensures the continuous working of the clock in the event that the AC mains and batteries are not available.

Accutorr V Service Manual 0070-10-0702 1 - 5

SDRAM stores running program instructions and data temporarily. The system memory and trend data memory is flashed. The device configuration memory is EEPROM.

Hardware Structure Theory of Operation

INPUT

EMI

FILTER

RECTIFIER

& FILTER

RECTIFIER

& FILTER

FLYBACK

CONVERTER

CURRENT

DETECTION

PMW

CONTROLLER

BATTERY

CHARGING

CIRCUIT

DC/DC

CONVERTER

COUPLER

FEEDBACK &

ISOLATION

CIRCUIT

DC/DC

CONVERTER

SWITCH CIRCUIT

DC/DC

CONVERTER

16.8V

12V

OUTPUT

3.3V

OUTPUT

0VP&0CP

0VP&0PP

PCON

1.4.2 Power Board

The power board, shown in FIGURE 1-5, converts the input power (AC mains or battery) to different working voltages for other boards. It also charges the battery.

FIGURE 1-5 Power Board Principle Diagram

The AC flows through the EMI filter and the rectifier and filter. The rectifier and filter converts the AC to 16.8V DC voltage by the Flyback converter. The 16.8V DC voltage is the main input to the DC/DC converters and charging circuit. The DC/DC converters convert 16.8V DC to 12V, 5V, and 3.3V DC. The charging circuit charges the lithium battery. When the Accutorr V is not connected to the AC mains, the battery supplies power to the DC/DC converters.

The 16.8V DC output is protected against over-voltage and over-power. The 12V, 5V, and

3.3V DC outputs are protected against over-voltage, short-circuit, and over–current.

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Theory of Operation Hardware Structure

3.3V

DISABLE

LED

FSTN LCD

MODULE

LCD

SIGNAL

ADV

3.3V

VSB

KEY MATRIX

CPLD

START-UP

CIRCUIT

Switch

DETECTION

LED&KEY

1.4.3 Key and Displays Board

The key and displays board, shown in FIGURE 1-6, provides the user interface. The board contains the LCD module, 7-segment digital display, LED indication lamp, and keys.

FIGURE 1-6 Key and displays Board Principle Diagram

The LCD module adjusts contrast and brightness.

The 7-segment digit units display parameter data.

The AC indicator is driven by the ADV output from the power board, and the working status indicator (built in the Power On/Off key) is driven by 3.3V voltage. The battery indicator is jointly controlled by the flash control signal, ADV signal, and VBC signal.

The keypad contains the power ON/OFF key and the other 13 function keys.

Accutorr V Service Manual 0070-10-0702 1 - 7

Hardware Structure Theory of Operation

HOST

ISOLATED SERIAL

IN/OUTPUT PORT

4KV ISOLATED

POWER SUPPLY

+3.3V +5V

-5V

+12V

CPU

/RST

WDI

DRAM

FLASH

A/D

CONVERTER

OFFSET DAC

OFFSET

AMPLIFIER

WATCHDOG

DRIVE DAC

LED DRIVE CIRCUITRY

SENSOR

GAIN CONTROL

CIRCUITRY

PROGRAMMABLE

GAIN CIRCUITRY

1.4.4 Parameter Boards

1.4.4.1 SpO

FIGURE 1-7 shows the SpO2 module parameter board diagram.

Module

FIGURE 1-7 SpO

The SpO

sensor collects the pulsing red and infrared light signals transmitting through the

Module Principle Diagram

finger or toe, and processes the collected signals to create the measured result. The SpO2 module controls the LED drive circuit and the amplifying circuit gain corresponding to the finger or toe perfusions and transmittances.

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Theory of Operation Hardware Structure

CUFF

PRESSURE

SENSOR

PRESSURE

SENSOR

FOR

PROTECT

PRESSURE

SIGNAL

AMPLIFIER

CIRCUITS

PRESSURE

SIGNAL

AMPLIFIER

CIRCUITS

FOR

PROTECT

CPU

ASYCHRONOUS

SERIAL

COMMUNICATION

WATCHDOG

OVER

PRESSURE

PROTECT

CIRCUIT

A/D

CONVERTER

PRESSURE

SIGNAL

MOTOR CONTROL FEEDBACK SIGNAL

PUMP AND

VALVE

CONTROL

CIRCUIT

FLASH DRAM

MANIFOLD

VALV ES

AND PUMP

TEMPERATURE

DETECT

CIRCUIT

PROBE

RECOGNIZE

CIRCUIT

A/D

CIRCUIT

PROBE

HEAT

CIRCUIT

CPU SYSTEM

(ROM & RAM

WATCHDOG)

POWER

& SIGNAL ISOLATE CIRCUIT

MAIN

BOARD

1.4.4.2 NIBP Module

FIGURE 1-8 shows the NIBP module parameter board diagram.

FIGURE 1-8 NIBP Module Principle Diagram

The Accutorr V calculates NIBP values using the oscillometric method of noninvasive blood pressure measurement. These measurements correspond to comparisons with auscultatory values, measured using the fifth Korotkoff sound within ANSI/AAMI SP10 standards for accuracy.

1.4.4.3 Optional Temperature Module

FIGURE 1-9 shows the Temperature module parameter board diagram.

FIGURE 1-9 Optional Temperature Module Principle Diagram

The Temperature Module uses a thermistor as a sensor for measuring temperature. The resistance of a given thermistor is nonlinearly relative to the temperature. The Temperature Module measures the resistance of the thermistor and converts it into temperature.

Accutorr V Service Manual 0070-10-0702 1 - 9

Hardware Structure Theory of Operation

1.4.5 Recorder

The recorder receives data from the main board and sends it to the thermal printhead for printing. It has a button to start or stop printing and a green LED to indicate the presence or absence of paper.

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Theory of Operation Hardware Structure

1.4.6 Bar Code Scanner

The bar code scanner reads one-dimensional and two-dimensional bar codes to simplify admitting a patient. The bar code scanner communicates with the monitor. The serial port supplies it with power. The scanner’s serial port is defined in the following table:

PIN DEFINITION

2Barcode_RX

3Barcode_TX

5GND

9VCC5VDC

The monitor’s serial port is defined in the following table:

PIN DEFINITION

2Monitor_TX

3Monitor_RX

5GND

9VCC5VDC

Basic settings of the bar code scanner are listed in the following table:

HOST PARAMETERS BAR CODE SCANNER FACTORY DEFAULT

Baud Rate 9600 9600

Data Bits 8 8

Stop Bits 1 1

Calibration bit 0 0

Handshaking None None

USER PARAMETERS BAR CODE SCANNER FACTORY DEFAULT

Beeper Tone Medium Medium

Beeper Volume Medium High

Trigger Mode Level Auto Aim

Parameter Scanning Disable Enable

DATA FORMAT BAR CODE SCANNER FACTORY DEFAULT

Prefix Value 7013 <CR><LF> 7013 <CR><LF>

Suffix 1 Value Suffix 2 Value

Scan Data Transmission Format <PREFIX><DATA><SUFFIX 1><SUFFIX 2> Data only

7013 <CR><LF> 7013 <CR><LF>

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Hardware Structure Theory of Operation

To ch an ge p ar am et er s et ti ng s, s ca n the following bar codes in sequence.

1. Set parameter defaults:

2. Set beeper volume:

3. Set trigger mode:

4. Set scan data transmission format:

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Theory of Operation Hardware Structure

5. Disable parameter scanning:

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Hardware Structure Theory of Operation

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