Ivy Biomedical Systems 101R Manual de usuario

Service Manual

Model 101R/NR

Patient Monitor

R-wave Trigger

2409-00-20

part of this manual may be reproduced without the permission of Ivy Biomedical Systems, Inc.

101R/NR0999

2409-00-20 REV 00

Table of Contents

WARRANTY.......................................................................................................................................................iv

INTRODUCTION................................................................................................................................................1

SAFETY................................................................................................................................................................2

Electrical................................................................................................................................................................2

Explosion...............................................................................................................................................................2

Patient Connections..............................................................................................................................................2

Pacemakers ...........................................................................................................................................................2

Electrosurgery.......................................................................................................................................................3

Defibrillation Protection......................................................................................................................................3

EMC.......................................................................................................................................................................3

Description of Labels............................................................................................................................................3

MONITOR DESCRIPTION ...............................................................................................................................4

Specifications.........................................................................................................................................................4

Control and Indicatiors........................................................................................................................................7

Basic Keys................................................................................................................................................7

Programmable Keys.................................................................................................................................8

Menu Structure.........................................................................................................................................9

Display ...................................................................................................................................................10

Rear Panel ..............................................................................................................................................10

MONITOR SETUP............................................................................................................................................12

Change Mains Voltage.......................................................................................................................................12

TRIGGER OUTPUT..........................................................................................................................................13

The Trigger Pulse...............................................................................................................................................13

Trigger-Spot Display..........................................................................................................................................13

ECG MONITORING.........................................................................................................................................14

Safety Considerations.........................................................................................................................................14

Patient Connections............................................................................................................................................15

ECG Waveform Amplitude (Size).....................................................................................................................15

Lead Selection.....................................................................................................................................................16

ECG Filter...........................................................................................................................................................16

Alarm Limits.......................................................................................................................................................17

RECORDER OPERATION..............................................................................................................................18

Changing Paper..................................................................................................................................................18

Recorder Menus..................................................................................................................................................19

Recorder Modes..................................................................................................................................................20

ALARM MESSAGES........................................................................................................................................22

Model 101R/NR Service Manual i

Table of Contents

MONITOR TESTING .......................................................................................................................................23

CLEANING ........................................................................................................................................................24

Monitor................................................................................................................................................................24

Patient Cables.....................................................................................................................................................24

ACCESSORIES..................................................................................................................................................25

Disposal................................................................................................................................................................25

THEORY OF OPERATION.............................................................................................................................26

General................................................................................................................................................................26

High Voltage Power Supply and Video Amplifier...........................................................................................26

Purpose of the High Voltage Power Supply...........................................................................................26

CRT Theory ...........................................................................................................................................26

Raster and Stroke Written Displays .......................................................................................................26

Timer Circuit..........................................................................................................................................27

High Voltage Module.............................................................................................................................27

Feedback Amplifier................................................................................................................................27

Adjustment Circuit.................................................................................................................................28

Cathode Generation Circuit....................................................................................................................28

Low Voltage Power Supplies.............................................................................................................................29

DC Voltages...........................................................................................................................................29

Isolated DC Voltages .............................................................................................................................29

ECG Input...........................................................................................................................................................29

Isolated Amplifiers.................................................................................................................................29

Lead Off Sensor .....................................................................................................................................29

Shield Drive ...........................................................................................................................................29

Lead Selection........................................................................................................................................29

Test Signal Generation...........................................................................................................................30

ECG Waveform..................................................................................................................................................30

ECF Filter...............................................................................................................................................30

X1000 Output.........................................................................................................................................30

ECG Gain...............................................................................................................................................30

A/D Converter........................................................................................................................................30

Cardiotach...........................................................................................................................................................31

Peak Detector.........................................................................................................................................31

Rate Computation...................................................................................................................................32

Alarm Generation...................................................................................................................................32

CRT Signals ........................................................................................................................................................32

Vertical Deflection.................................................................................................................................32

Horizontal Deflection.............................................................................................................................32

Horizontal Correction.............................................................................................................................32

Unblanking.............................................................................................................................................33

Audio Circuits.....................................................................................................................................................33

ECG Audio.............................................................................................................................................33

Alert Audio.............................................................................................................................................33

Digital Circuitry..................................................................................................................................................34

ii Model 101R/NR Service Manual

Table of Contents

TESTING AND TROUBLESHOOTING.........................................................................................................35

ECT Test .............................................................................................................................................................35

Equipment Required...............................................................................................................................35

Initial Settings for the Test.....................................................................................................................35

ECT Test Procedure...............................................................................................................................35

Troubleshooting..................................................................................................................................................37

General Checks ......................................................................................................................................37

CRT Display...........................................................................................................................................37

Mother Board.........................................................................................................................................37

Troubleshooting Table ...........................................................................................................................38

Block Diagram....................................................................................................................................................39

Voltage Measurements.......................................................................................................................................40

Key Signals..........................................................................................................................................................41

Adjustment Procedure.......................................................................................................................................43

Equipment Required...............................................................................................................................43

ECG Signal.............................................................................................................................................43

50/60 Hz Notch Filter.............................................................................................................................43

Peak Detector.........................................................................................................................................43

CRT Display...........................................................................................................................................44

ASSEMBLY AND DISASSEMBLY.................................................................................................................46

Removing Cover.................................................................................................................................................46

Removing the High Voltage Power Supply......................................................................................................46

Removing the Yoke.............................................................................................................................................47

Removing the CRT.............................................................................................................................................47

Replacing the Main Power LED........................................................................................................................47

Removing the Recorder Assembly....................................................................................................................47

Removing the Mother Board.............................................................................................................................48

Replacing the Touch Panel................................................................................................................................48

PURCHASING INFORMATION.....................................................................................................................49

Part List...............................................................................................................................................................49

Terms and Conditions........................................................................................................................................49

BOARD LAYOUT DIAGRAMS .......................................................................................................................A

SCHEMATICS DIAGRAMS.............................................................................................................................B

Model 101R/NR Service Manual iii

WARRANTY

All products warranted to be free from defects in material and workmanship and to operate within published

specifications, under normal use, for a period of two years from date of original shipment.

If an examination discloses such products or component parts to have been defective, then our obligation is limited

to repair or replacement (at our option). Fuses and batteries are not covered under this warranty.

During the first year of service, there is no charge for parts or labor. In the second year of service, the customer is

charged for labor only.

iv Model 101R/NR Service Manual

INTRODUCTION

This manual is to provide information on the correct use of the Model 101R/NR monitor. It is up to the user to

ensure that any applicable regulations respecting the installation and operation of the monitor are observed.

Manufacturer's Responsibility

The manufacturer of this equipment is responsible for the effects on safety, reliability, and performance of the

equipment only if:

•assembly operations, extensions, re-adjustments, or repairs are carried out by persons authorized by the

manufacturer

•the electrical installation complies with all applicable regulations

•the equipment is used in accordance with the instructions in this manual.

Incorrect operation or failure of the user to maintain the monitor in accordance with proper maintenance procedures

relieves the manufacturer or his agent from all responsibility for consequent non-compliance, damage, or injury.

For technical and service information, please refer to the Model 101R/NR Service Manual.

READ THE ENTIRE SAFETY INFORMATION SECTION BEFORE YOU OPERATE THE MONITOR.

Model 101R/NR Service Manual 1

SAFETY

Electrical

This product is intended to be operated from a mains power source of nominally 100, 120, 220 and 230 V ~. The

correct mains operating voltage is specified on the monitor's rear panel.

To prevent electrical hazards to all personnel, this monitor must be properly grounded. The power cable supplied

with this equipment provides for this protection. Do not attempt to defeat this protection by modifying the cable or

by using ungrounded adapters.

WARNING: Electric shock hazard! Do not remove covers or panels. Refer service to qualified service personnel.

WARNING: To avoid electrical shock, disconnect the monitor from its power source before changing fuses.

Replace only with same type and rating of fuse.

WARNING: Do not clean monitor while it is on and/or plugged in.

WARNING: This unit uses a common isolation path for ECG leads. Do not connect any non-isolated accessories to

the ECG input connected to a patient, as this may compromise the safety of the unit. When attached to other

devices, insure that the total chassis leakage currents of all units do not exceed 300µA.

Explosion

DANGER: Explosion hazard! Do not use this equipment in the presence of flammable anesthetics.

Patient Connections

Patient connections are electrically isolated Type CF ⎯⏐ ♥⏐⎯. For all connections use insulated probes. Don't let

patient connections contact other conductive parts, including earth. See instructions for patient connections in this

manual.

Carefully route patient cables to reduce the possibility of patient entanglement or strangulation.

Leakage current is limited internally by this monitor to less than 10 µA. However, always consider additional

leakage current that can be caused by other equipment used on the patient at the same time as this monitor.

To ensure that the leakage current protection remains within the specifications, use only the patient cables specified

in the patient connections instructions in this manual.

Pacemakers: Rate meters might continue to count the pacemaker rate during occurrences of cardiac arrest or some

arrhythmias. Do not rely on rate meter alarms. Keep pacemaker patients under close surveillance.

2 Model 101R/NR Service Manual

SAFETY

Electrosurgery

Avoid electrosurgery burns at monitoring sites by ensuring proper connection of the electrosurgery return circuit. If

improperly connected, some electrosurgery units might allow energy to return through the electrodes.

Defibrillation Protection

This equipment is protected against 360 J discharge and electrosurgery potentials. The monitor is internally

protected to limit current through the electrodes to prevent injury to the patient and damage to the equipment as long

as the defibrillator is used in conformance with the manufacturer's instructions.

EMC

This equipment has been certified to be protected to emissions and immunity according to IEC-601-1-2.

Description of Warning Labels

Attention, consult ACCOMPANYING DOCUMENTS before attempting to change

power supply selection or carry out interconnections. Equipment connected should

comply with IEC-601-1 or IEC-950 with configuration to IEC-601-1-1.

Equipotential earth connector adjacent to this symbol.

Protective earth (ground) adjacent to this symbol. Internal connection on mains

connector/filter.

⎯⏐♥⏐⎯ Type CF equipment, Defibrillator proof.

_______ Fuse type/rating.

{⏐{= OFF, ⏐= ON.

∼Alternate Current (AC)

Output signal.

DANGER

HIGH

VOLTAGE

Model 101R/NR Service Manual 3

MONITOR DESCRIPTION

The Model 101R/NR Portable Patient Monitor is a dual trace monitor for ECG and heart rate, which produces an

output pulse corresponding in time to the R-wave. The monitor is intended primarily for use in timed imaging

studies, TMR/PMR and any application requiring precision R-wave synchronization.

Specifications

ECG

Lead Selection: LI, LII, LIII menu selectable.

Patient Cable: 6-Pin AAMI Standard connector

Isolation: Isolated from ground related circuits by >4 kV rms, 5.5 kV peak

CMRR: ≥90 dB with patient cable and 51 kΩ/47 nF imbalance

Input Impedance: ≥20 MΩat 10 Hz with patient cable

Frequency Response

CRT: Filtered: 0.5 to 25 Hz

Unfiltered: 0.5 to 45 Hz

Frequency Response

X1000 output: Filtered: 0.5 to 25 Hz

Unfiltered: 0.2 to 100 Hz

Input Bias Current: Any lead configuration <200 nA dc maximum

Electrode Offset

Potential: ±0.5 V DC

Noise: <20µV peak-to-peak, referred to the input with all leads connected

through 51 kΩ/47 nF to ground

Defibrillator Protection: Protected against 360 J discharge and electrosurgery potentials

Leakage Current: <10 µA at normal condition

Electrosurgical Interference

Protection: Standard

Notch Filter: 50/60 Hz (automatic).

Model 101R/NR Service Manual

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