Ivy Biomedical Systems 101R User manual

Service Manual
Model 101R/NR
Patient Monitor
R-wave Trigger
2409-00-20

Copyright ©1999 by Ivy Biomedical Systems, Inc., Branford, Connecticut. All rights reserved. No
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
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
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
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
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
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
4

MONITOR DESCRIPTION
Cardiotach
Range: 15 to 255 bpm
Accuracy: ±1%
Resolution: 1 bpm
Sensitivity: 300 µV peak
Pace Pulse Rejection
Width: 0.1 to 2 ms at 2 to 700 mV
Tall T Wave Rejection: Rejects T waves ≤R wave
Alarms
High Rate: 100 to 250 bpm in 5 bpm increments
Low Rate: 30 to 100 bpm in 5 bpm increments
Asystole: R to R interval >6 seconds
Lead Off: Detached lead or offset potential >0.5 V
Test Mode
ECG: 1 mV/100 ms @ 70 bpm
Display
Type: CRT, P31 phosphor, non-fade
Trace: Dual, Fixed (moving bar), single trace normal operation. Dual trace in
“freeze” mode.
Screen Size: 14.25 cm by 10.2 cm, 17.5 cm diagonal
Sweep Speed: 25, 50 mm/s
Mechanical
Size: Height: 6.25 in. (16 cm)
Width: 12.5 in. (31 cm)
Depth: 16.0 in. (40 cm)
Weight: < 20 lbs (9 kg)
Model 101R/NR Service Manual
5

MONITOR DESCRIPTION
Trigger Output
Phase Delay fromElectrode
Leads to Trigger Output: < 3 ms
R to R Trigger Accuracy: ±200 µs typical @ 1 mV input
Sensitivity and Threshold
Adjustment: Fully Automatic
Optional Trigger Delay: User adjustable from 0 to 700 ms in 5 ms increments.
Environmental
Operating Temperature
Range: 5°C to 45°C
Storage Temperature
Range: -25°C to 60°C
Relative Humidity: 0-90% non-condensing
Power Requirements
Voltage Input: 100, 120, 220, 230, V ~, 50/60 Hz; +10% - 15%
(to change mains operating voltage see text on Monitor Setup).
Maximum ac Power
Consumption: 85 VA
Safety
Unit meets or exceeds the specifications for the AAMI Cardiac Monitor Standard. Units meet UL544,
CSA, and CE-MDD 93/42/ECC requirements. ISO-9001 Approval # 98-1044.
Model 101R/NR Service Manual
6

MONITOR DESCRIPTION
Controls and Indicators
Basic Keys
MAINS POWER
SWITCH: A switch to control ac power input to the monitor. The | position is on, Ois off.
Puts monitor into setup mode and causes setup menu to be displayed on the right portion of the
screen. The monitor returns to normal mode after pressing MENU again or if no keys are pressed
for 20 seconds.
Disables the audible and visual alarms for a two-minute period to allow the operator perform
procedures that would otherwise set off the alarms. This avoids the problem of turning off the
alarms and forgetting to turn them back on. Press this key again to return the alarms to normal
before the two minutes have expired.
Generates a 1 mV pulse at 70 bpm that is displayed on the ECG trace and sent to the X1000
output on the rear panel while the switch is depressed. This is used to ensure that the monitor is
functioning correctly.
Turns the alarm audio on and off. When off, the ALARMS OFF message is displayed on the left
side of the screen.
Activates recorder. Push to start, push again to stop. (101R)
Model 101R/NR Service Manual
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MONITOR DESCRIPTION
Basic Keys
ECG Patient
Cable input
Power Switch Programmable Keys
Programmable Keys
Each of the following keys, to the right of the CRT display, has a normal function, printed on the key, and two
menu functions, displayed on the screen in the setup modes. The additional functions are accessed by pressing the
MENU key once. Return to normal function by pressing MENU key again.
Selects the speed at which the ECG trace moves across the screen.
Stops the movement of the ECG waveform on the display for closer evaluation and displays the
waveform as a second trace below the actual trace. Press FREEZE again to resume movement.
Resets the audible and visual indicators for an alarm that has been activated.
Enables the Trigger-Spot feature, which highlights the point in the ECG waveform when the
trigger output pulse occurs.
Model 101R/NR Service Manual
8

MONITOR DESCRIPTION
MENU STRUCTURE
HIGH
LOW
TRIG. DELAY
(101R)
Model 101R/NR Service Manual
9

MONITOR DESCRIPTION
Display
HEART RATE: Displayed in beats per minute (bpm) on the upper left part of the screen.
SETUP: Selections made in the menu setup modes (alarm limits, lead selection, and filter on/off) are displayed in
small characters at the upper right corner.
ECG: Trace is displayed across the screen moving from right to left.
ALARMS: The following alarm indications are displayed in reverse video. Alarm indications appear on the upper
right portion of the screen and flash once per second except ALARMS OFF, which is displayed on the upper left
portion of the screen and is displayed as .
: The audible alarms have been turned off.
LEAD OFF: A lead has become disconnected. This alarm cannot be reset with the
ALERT RESET key.
HR HIGH: The high heart rate limit has been exceeded for four seconds.
HR LOW: The low heart rate limit has been exceeded for four seconds.
ASYSTOLE: The interval between heartbeats has exceeded six seconds.
Rear Panel
The following are located on the rear panel.
POWER INPUT: A receptacle for a standard ac power cord.
When the monitor is connected to another piece of equipment through this rear panel connector, always make sure
that each piece of connected equipment has its own separate ground connection.
Do not attempt to connect cables to these connectors without contacting your Biomedical Engineering Department.
This is to ensure the connection complies with leakage current requirements of one of the following applicable
standards: UL 544, CSA 22.2 No. 125 or IEC 601-1. The maximum non-destructive voltage that may be applied to
these connectors is 5V.
TRIGGER OUTPUT: A BNC type connector for the output of the trigger pulse indicating the timing of the peak
of the R-wave. The output can be delayed from the peak of the R-wave through user controls.
QRS VOLUME CONTROL: A switch to control the QRS beep audio volume. Alarm audio is not affected.
PEQ GROUND: Potential Equalization - A ground connection that can be used to ensure that no potential
differences can develop between this equipment and other electrical equipment.
FUSE: Replace only with the same type and rating of fuse as indicated on the fuse rating label.
Model 101R/NR Service Manual
10

MONITOR DESCRIPTION
ECG X1000: This is an ECG analog wave output.
TRIGGER POLARITY SWITCH: Selects output trigger polarity.
PHYS. TRIG.
OUTPUT
TRIGGER
POLARITY
NEG POS
QRS
VOLUME
MAX
OFF
MIN
REFERS TO
OPERATOR'S MANUAL
X 1000
ECG
85VA 50/60Hz
120 Vac
QRS Volume
Control
ECG Output
(¼" stereo jack)
Tip=ECG X1000
PEQ Ground
Voltage Selection
wheel
Fuse
(Beneath Panel)
Power Input
Trigger Output/BNC
Selects Output
Trigger Polarity
Fuse rating
100V ⏐120V 220V ⏐230V
T 1.6 Amp T 1.0 Amp
250V 250V
5mm x 20mm 5 mm x 20 mm
Model 101R/NR Service Manual
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MONITOR SETUP
MONITOR SETUP
To setup the instrument for operation:
1. Plug the ac line cord into a power source providing the proper voltage.
Check the monitor's rear panel to verify the voltage range required by the monitor.
2. Press the POWER switch at the left side of the front panel to turn power on.
3. Connect the patient cable to the ECG connector on the front panel.
4. Connect the Trigger Output from the monitor rear panel to the device being triggered.
To change Mains Voltage:
1. Locate power entry module in Rear Panel.
2. Remove line cord.
3. Pry down entry cover.
4. Locate and remove voltage wheel and set for appropriate voltage.
5. Replace fuse with proper size (see fuse rating).
6. Replace cover.
12 Model 101R/NR Service Manual

TRIGGER OUTPUT
TRIGGER OUTPUT
The Trigger Pulse
The ECG Trigger Output produces a 100 ms, 0 - 5 V trigger pulse starting at the peak of each R-wave, which is
available on the TRIGGER OUTPUT BNC connector on the rear panel of the monitor. The following shows the
timing of the trigger pulse compared to the ECG waveform.
Trigger-Spot Display
Press the TRIG MARK key on the front panel to highlight the portion of the ECG waveform corresponding to the
timing of the trigger pulse. Press TRIG MARK again to disable Trigger-Spot.
Optional Trigger Delay
Trigger delay is user adjustable by
using the Trigger Delay menu.
Range is from 0 to 700 ms in 5 ms
increments.
Intensity modulation highlights
position of ECG where delay occurs.
Model 101R/NR Service Manual 13

ECG MONITORING
ECG MONITORING
When ECG monitoring, the display shows the ECG waveform across the center; the heart rate, heart rate limits, and
lead selection in the upper left corner; and alarm indications. Also, a heart symbol flashes each time a heartbeat is
detected.
Safety Considerations
Disposable products are intended for single-use only. Do not attempt to re-use these products.
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.
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.
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.
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.
Model 101R/NR Service Manual
14