Mindray Datascope Accutorr V User manual

S e r v i c e M a n u a l

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

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

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

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

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

Copyright © Mindray DS USA, Inc., 2009. Printed in U.S.A. All rights reserved. Contents of this publication may not be reproduced in any form without permission of Mindray DS USA, Inc.

Accutorr V Service Manual

0070-10-0702

Table of Contents

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
SpO2 Module .................................................................................................................................	1	-	8
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
SpO2 Measurement ........................................................................................................................................	2	-	6
DPM SpO2 Module Performance...............................................................................................................	2	-	6
SpO2 ............................................................................................................................................	2	-	6
Pulse Rate .......................................................................................................................................	2	-	6
Alarm setting range .........................................................................................................................	2 - 6
Masimo MS-2013 SpO2 Performance........................................................................................................	2 - 7
SpO2 .............................................................................................................................................	2	- 7
Pulse Rate .......................................................................................................................................	2	- 8
Alarm Setting Range ........................................................................................................................	2	- 8
Nellcor NELL-3 SpO2 Performance.............................................................................................................	2	- 9
SpO2 ............................................................................................................................................	2	- 9
Pulse Rate .......................................................................................................................................	2	- 9
Alarm Setting Range ........................................................................................................................	2	- 9

Accutorr V Service Manual

0070-10-0702

i

Table of Contents

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
SpO2 Measurement Failure ......................................................................................................................	3	- 9
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

Table of Contents

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 SpO2 Modules...................................................................................................................	4	- 17
Disassembling a DPM SpO2 module ..................................................................................................	4 - 17
Disassembling a Masimo SpO2 module .............................................................................................	4	- 17
Disassembling a Nellcor SpO2 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
SpO2 Test......................................................................................................................................................	6	- 12
SpO2 Test Under Normal Conditions .........................................................................................................	6	- 12
SpO2 Test in Motion Mode.......................................................................................................................	6	- 12
Summary of Test Methods.........................................................................................................................	6	- 13
DPM SpO2 .....................................................................................................................................	6	- 13
Nellcor SpO2 .................................................................................................................................	6	- 13
Masimo SpO2 .................................................................................................................................	6	- 13
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

Accutorr V Service Manual

0070-10-0702

iii

Table of Contents

This page intentionally left blank.

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 OximetryÑ

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

¥Accutorr V with Nellcor® Pulse Oximetry and SmarTemp™Ñ includes NIBP, Nellcor SpO2, SmarTemp, a Trend Display, and Recorder

¥Accutorr V with Masimo SET® Pulse OximetryÑ includes NIBP, Masimo SpO2, a Trend Display, and Recorder

¥Accutorr V with Masimo SET® Pulse Oximetry and SmarTemp™Ñ includes NIBP, Masimo SpO2, SmarTemp, a Trend Display, and Recorder

¥Accutorr V with DPM Pulse OximetryÑ

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

¥Accutorr V with DPM Pulse Oximetry and SmarTemp™Ñ

includes NIBP, DPM SpO2, 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

Warnings, Cautions, and Notes	Introduction

Warnings, Cautions, and Notes

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

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

ACAUTION 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.

ANOTE is provided when additional general information is available.

Warnings

WARNING: Internal Electrical Shock Hazard - 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 WARNING labels on the unit.

WARNING: Possible explosion hazard. Do not operate machine near flammable anesthetic agents or other flammable substances. Do not use flammable anesthetic agents (i.e., ether or cyclopropane.)

WARNING: Always place the unit on a flat, rigid surface or onto a

Mindray approved stable mounting bracket.

WARNING: To ensure proper performance and safety and to prevent the voiding of the warranty, only use authorized parts and accessories with the Accutorr V. Use of unauthorized accessories may result in erroneous readings.

WARNING: Use only cuffs with approved quick connect type connectors.

WARNING: The Accutorr V is not intended for use in a magnetic resonance imaging (MRI) environment and may interfere with MRI procedures.

WARNING: Danger of explosion if battery is incorrectly replaced. 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 device may present a risk of fire or chemical burn if mistreated. Do not incinerate battery, possible explosion may occur.

WARNING: Do not use a damaged or broken unit or accessory.

WARNING: Operation of the Accutorr V below the minimum amplitude or value of patient physiological signal may cause inaccurate results.

Accutorr V Service Manual

0070-10-0702

vii

Introduction	Cautions

WARNING: Use of accessories, transducers, and cables other than those 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.

WARNING: Perform the decontamination or cleaning process with the unit powered down and power cord removed.

WARNING: Electrical safety tests are a proven means of verifying the 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.

WARNING: Commercially available test equipment such as a safety 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.

WARNING: Electrical safety tests should meet the requirements of the latest editions of EN 60601-1 and UL 60601.

WARNING: These electrical safety tests do not supersede local requirements.

WARNING: All devices using the AC mains and connected to medical 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. If an obstruction is found, refer the unit to qualified service personnel.

CAUTION: At the end of their life, dispose of the Accutorr V, accessories, and single use supplies in accordance with local regulations. Dispose of packaging waste in accordance with local regulations.

CAUTION: When equipped with Nellcor® SpO2, use only Nellcor® oxygen transducers including Nellcor® Oxisensor® patient dedicated adhesive sensors. Use of other oxygen transducers may cause improper oximeter performance.

CAUTION: When equipped with MASIMO® SpO2, use only MASIMO® oxygen transducers including MASIMO LNOP® and MASIMO LNCS® patient dedicated adhesive sensors and MASIMO PC Series Patient Cable. Use of other oxygen transducers may cause improper Oximetry performance.

viii

0070-10-0702

Accutorr V Service Manual

Cautions	Introduction

CAUTION: Inaccurate readings may be caused by incorrect sensor 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.

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

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

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

CAUTION: Properly connect the cables or wires when reassembling the 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.

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

CAUTION: Disconnect the monitor from the patient and make sure that 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 shock	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.
	SpO2 - Type BF protected applied part.
	Temp - Type BF protected applied part.
Supply Connection	100 Ð 240 VAC
	50/60 Hz
	0.85 Ð 0.5 A
Mode of Operation	Continuous

x

0070-10-0702

Accutorr 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 designed for direct electrical and
Equipment and Patient	non-electrical connection to the patient.
Degree of Mobility	Portable

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 patientÕs 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 [phone] or [phone] for prompt assistance in resolving shipping problems.

NOTE:	The Accutorr V should only be shipped in its original
	packing materials to avoid shipping damage.

Accutorr V Service Manual

0070-10-0702

xi

Introduction	Symbols and Descriptions

Symbols and Descriptions

SYMBOL

T1

SpO2

REF

DESCRIPTION	SYMBOL	DESCRIPTION
Attention, Consult
Accompanying Documents /		Type BF Equipment
Refer to Manual
Equipotentiality		Defibrillator-proof Type BF
Equipotential grounding		Equipment
Alternating Current (AC)		Adult
Predictive Thermometer		Pediatric/Child
Connector
SpO2 Connector		Neonate
Electrical connectors		Operating on battery power
Battery		Manufacturer
Connected to AC mains		NIBP Connector
Power On/Off Ð 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
	Start NIBP key
	Display Tabular Trends/Pleth	NC1
	Wave
	NIBP interval key	SP1
	Print key (front panel)	CS1
	Print key (recorder)
	Alarm Silenced indicator on
	LCD display

Patient Size key

Alarm Silence key

Nurse Call connector

RS-232 connector (Serial Port 1)

Network connector

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

This page intentionally left blank.

xiv

0070-10-0702

Accutorr V Service Manual

1.0Theory 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

1.1Introduction

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.

1.2Controls and Indicators

For information on controls, connectors, and indicators, refer to the Accutorr V Operating

Instructions, Part Number 0070-10-0699-02.

1.3System Overview

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

FIGURE 1-2 shows the Accutorr V monitoring systemÕs PC board connections.

SYSTEM

MECHANICAL

HARDWARE

SOFTWARE

MAIN UNIT

MAIN BOARD

SYSTEM

SOFTWARE

RECORDER

POWER

PARAMETER

BOARD

SOFTWARE

BATTERY

KEY &

UPGRADE

CHAMBER

DISPLAY

SOFTWARE

TEMP

PARAMETER

PRINT

MODULE

BOARDS

SOFTWARE

CHAMBER

BARCODE

RECORDER

GATEWAY

SCANNER

BOARD

SOFTWARE

SUPPORT

BARCODE

SCANNER

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

1 - 2

0070-10-0702

Accutorr V Service Manual

Theory of Operation	System Overview

J6

RECORDER

J2

PARAMETER RECEPTACLE

J1

J2

SpO2

TEMP

NIBP

J2

J4

J2

P2

J4

ISOLATION

ISOLATION

POWER BOARD

POWER BOARD

P1

J3

J2

J2

J1

J1

J7

J8

POWER

P3

P4

J6

P5

KEY & DISPLAY

BOARD

J3

J4

J5

P2

AC

FAN

BATTERY

INLET

LCD

FIGURE 1-2 The System PCBA Connections

J3

J4

J5

MAIN BOARD

J9

J10

J11

J12

J13

SPEAKER

CONNECTORNETWORK

RS232

BDM

PORT

NURSE CALL

Accutorr V Service Manual

0070-10-0702

1 - 3

Hardware Structure	Theory of Operation

1.4Hardware Structure

FIGURE 1-3 shows the Accutorr VÕs 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.

	NIBP MODULE		SpO2 MODULE		TEMP MODULE
			ISOLATION		ISOLATION
			POWER BOARD		POWER BOARD
		COMMUNICATIONS			COMMUNICATIONS
		/POWER SUPPLY			/POWER SUPPLY
	LED &
	KEY				ETHERNET
KEY &	LCD		MAIN BOARD
DISPLAY					RS232
BOARD
	POWER				NURSE CALL
	SUPPLY
	SPEAKER	RECORDER			BATTERY
			FAN
				POWER BOARD
					AC
			ACCUTORR V
FIGURE 1-3 The Accutorr VÕs 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

1.4.1Main 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.

WATCHDOG

RTC		E2 PROM

ETHERNET	PHY RTL8201
NURSE CALL	SERIAL PORT 0	RS232
	RS232 IC
SPEAKER	AUDIO PROCESS	SERIAL PORT 1:
	CIRCUIT
		NIBP

SDRAM			FLASH

1.5V

LINEAR POWER

FPGA

SERIAL PORT 2: SpO2

SERIAL PORT 3: TEMP

SERIAL PORT 4:

RECORDER

3.3V		5.0V		12V		LCD	LED KEY

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.

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

Accutorr V Service Manual

0070-10-0702

1 - 5

Hardware Structure	Theory of Operation

1.4.2Power 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.

				16.8V			12V
AC	EMI	RECTIFIER		RECTIFIER	DC/DC	0VP&0CP	OUTPUT
INPUT	FILTER	& FILTER	FLYBACK	& FILTER	CONVERTER
			CONVERTER
							5V
					DC/DC		OUTPUT
					CONVERTER
			CURRENT
			DETECTION
		PMW			CHARGING
	CONTROLLER					BATTERY
					CIRCUIT
			COUPLER	0VP&0PP
			FEEDBACK &
			ISOLATION
			CIRCUIT				3.3V
					DC/DC		OUTPUT
					CONVERTER
					SWITCH	0VP&0CP
					CIRCUIT
					PCON

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 overÐcurrent.

1 - 6

0070-10-0702

Accutorr V Service Manual

Theory of Operation	Hardware Structure

1.4.3Key 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.

LCD	FSTN LCD	LED
SIGNAL	MODULE
		CPLD	LED&KEY
		3.3V	START-UP
		DISABLE	CIRCUIT
		Switch	DETECTION
	KEY MATRIX
ADV
3.3V
VSB
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

1.4.4Parameter Boards

1.4.4.1SpO2 Module

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

	/RST	ISOLATED SERIAL
	WATCHDOG
		IN/OUTPUT PORT
	WDI
			HOST
	DRAM	4KV ISOLATED	+12V
		POWER SUPPLY
	DRIVE DAC
	CPU	+3.3V
		+5V
	FLASH	-5V
	LED DRIVE
	CIRCUITRY
	SENSOR
		A/D
		CONVERTER

	GAIN CONTROL					OFFSET DAC
	CIRCUITRY
	PROGRAMMABLE					OFFSET
	GAIN CIRCUITRY					AMPLIFIER

FIGURE 1-7 SpO2 Module Principle Diagram

The SpO2 sensor collects the pulsing red and infrared light signals transmitting through the 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.

1 - 8

0070-10-0702

Accutorr V Service Manual

Theory of Operation	Hardware Structure

1.4.4.2NIBP Module

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

PRESSURE

OVER

CUFF

PRESSURE

SIGNAL

PRESSURE

SENSOR

AMPLIFIER

PROTECT

FOR

CIRCUITS

CIRCUIT

ASYCHRONOUS

PROTECT

FOR

SERIAL

PROTECT

CPU

COMMUNICATION

WATCHDOG

PRESSURE

PRESSURE

SIGNAL

PRESSURE

SIGNAL

A/D

SENSOR

AMPLIFIER

CONVERTER

CIRCUITS

MOTOR CONTROL

MANIFOLD

FEEDBACK SIGNAL

PUMP AND

VALVES

VALVE

FLASH

DRAM

CONTROL

AND PUMP

CIRCUIT

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.

1.4.4.3Optional Temperature Module

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

PROBE

RECOGNIZE

CIRCUIT

CPU SYSTEM

POWER

TEMPERATURE

A/D

&

MAIN

DETECT

(ROM & RAM

SIGNAL

CIRCUIT

CIRCUIT

WATCHDOG)

ISOLATE

BOARD

CIRCUIT

PROBE

HEAT

CIRCUIT

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

1.4.5Recorder

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.

1 - 10

0070-10-0702

Accutorr V Service Manual

Theory of Operation	Hardware Structure

1.4.6Bar 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 scannerÕs serial port is defined in the following table:

PIN	DEFINITION
2	Barcode_RX
3	Barcode_TX
5	GND
9	VCC5VDC

The monitorÕs serial port is defined in the following table:

PIN	DEFINITION
2	Monitor_TX
3	Monitor_RX
5	GND
9	VCC5VDC

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	7013 <CR><LF>	7013 <CR><LF>
Suffix 2 Value
Scan Data Transmission Format	<PREFIX><DATA><SUFFIX 1><SUFFIX 2>	Data only

Accutorr V Service Manual

0070-10-0702

1 - 11

Hardware Structure	Theory of Operation

To change parameter settings, scan the following bar codes in sequence.

1. Set parameter defaults:

2. Set beeper volume:

3. Set trigger mode:

4. Set scan data transmission format:

1 - 12

0070-10-0702

Accutorr V Service Manual

Theory of Operation	Hardware Structure

5. Disable parameter scanning:

Accutorr V Service Manual

0070-10-0702

1 - 13

Hardware Structure	Theory of Operation

This page intentionally left blank.

1 - 14

0070-10-0702

Accutorr V Service Manual