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AED 20
User manual
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Welch Allyn AED 20 User manual

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AED 20
Table of Contents
Welch Allyn AED 20 Users Manual
Revision K compatible with software version 07.02.XX
Preface
Manufacturer............................................................................................i
FDA Medical Device Registration.........................................................i
Manufacturer's Responsibility...............................................................ii
User's Responsibility..............................................................................ii
Contact and Technical Support...........................................................iii
Declaration of Conformity......................................................................iv
Safety
Conventions Used in the Manual..........................................................v
General Cautions and Notices.............................................................vii
Patient Safety........................................................................................viii
Defibrillator and Electrode Pads...........................................................xi
Battery and Charger.............................................................................xiii
Care and Storage..................................................................................xv
Safety Symbols .....................................................................................xvi
Chapter 1 Introducing the Welch Allyn AED20
Overview of the Welch Allyn AED20...............................................1-3
Features .......................................................................................1-3
System Upgrades and Options.................................................1-4
Qualified Operators ....................................................................1-4
Getting the Welch Allyn AED20 Ready...........................................1-5
Unpacking and Inspecting.........................................................1-5
Installing the Battery...................................................................1-5
Running the Self -Test................................................................1-7
Getting to Know the Welch Allyn AED20.........................................1-8
Welch Allyn AED20 Configurations..........................................1-8
Functions ......................................................................................1-9
Battery Charging and Conditioning...............................................1-19
The WELCH ALLYN Quick Charger/Conditioner................1-20
Charging a Battery...................................................................1-21
Conditioning a Battery.............................................................1-21
The Alternate WELCH ALLYN Quick
Charger/Conditioner.................................................................1-22
Preparing the Welch Allyn AED20 for Storage ...........................1-24
Welch Allyn AED20 Accessories Part List ................................... 1-25
Chapter 2 Using the Welch Allyn AED20
Overview...............................................................................................2-3
Trained Operators .......................................................................2-3
Fibrillation and Defibrillation.......................................................2-3
Indications and Contraindications for Use...............................2-4
Welch Allyn AED20 Operating Procedures –
Quick Reference ...............................................................................2-6
Automated Mode.........................................................................2-6
Manual Mode...............................................................................2-7
Welch Allyn AED20 Operating Procedures –
Detailed Information.........................................................................2-8
Assess the Patient.......................................................................2-8
Start the Welch Allyn AED20.....................................................2-8
Attach the Electrode Pads and Connecting Cable .................2-9
Analyze Patient’s Heart Rhythm............................................2-12
Deliver Shock —Automated Mode........................................2-13
Deliver Shock —Manual Mode ...............................................2-15
Defibrillator Disarm...................................................................2-18
Perform CPR.............................................................................2-18
EMS Mode .................................................................................2-19
Electrode Monitoring (option).................................................2-22
Post-Use Procedures.......................................................................2-28
TOC-2 Welch Allyn AED 20 Users Manual 990020 – Rev. K
Chapter 3 Programming the Welch Allyn AED20
Menu Structure Diagram ...................................................................3-3
Menu Structure Overview..................................................................3-4
Accessing the User Menu from Automated Mode .........................3-4
Accessing the User Menu from Manual Mode...............................3-5
User Menu...........................................................................................3-7
User Menu Structure Overview................................................3-8
Working with the Log ..................................................................3-9
Setting the Date........................................................................3-14
Setting the Time........................................................................3-15
Adjusting the Contrast..............................................................3-16
Adjusting the Speaker Volume...............................................3-17
EMS Mode.................................................................................3-18
Supervisor Menu Tree.....................................................................3-19
Supervisor Menu ..............................................................................3-20
Accessing the Supervisor Mode.............................................3-21
Supervisor Menu Items............................................................3-22
Selecting a Language..............................................................3-23
Setting the Charge Protocol....................................................3-24
Diagnostics ................................................................................3-25
Calibration..................................................................................3-26
Viewing Information on the PCMCIA Memory Card............3-30
Setting Options..........................................................................3-32
Changing Manual and Supervisor
Password Codes.......................................................................3-35
Upgrading the Welch Allyn AED20 System..........................3-36
Chapter 4 Maintaining the Welch Allyn AED20
Inspection.............................................................................................4-3
Scheduling Inspections..............................................................4-3
Power-Up and Self -Test............................................................4-4
Inspecting for Damage ...............................................................4-4
Service and Repair.....................................................................4-5
Checklists for Preparedness......................................................4-6
FDA Checklist .........................................................................4-6
Automated External Defibrillator
Operator’s Checklist ...........................................................4-6
Infrequent Use (Non-Rechargeable batteries) ..................4-7
Frequent Use (Recharge able batteries).............................4-8
Maintenance Schedule....................................................................4-10
General ...................................................................................... 4-10
Battery Maintenance................................................................4-12
Charger and Battery Care for
Rechargeable Batteries..................................................4-12
Recommended Battery Conditioning
Schedule...........................................................................4-13
Battery Capacity Test ........................................................ 4-14
Cleaning and Disinfecting the Welch Allyn AED20.....................4-16
Chapter 5 Troubleshooting the Welch Allyn AED20
Troubleshooting the Welch Allyn AED20........................................5-3
Attaching Electrode Pads...........................................................5-3
Analyzing Interrupted..................................................................5-4
Printing Problems........................................................................5-5
No Shock Delivered....................................................................5-5
Defibrillator...................................................................................5-6
Battery...........................................................................................5-7
Other Problems............................................................................5-8
Frequently Asked Questions .....................................................5-9
Appendix A Specifications
Technical Specifications.....................................................................A-1
Appendix B Glossary
Glossary...............................................................................................B-1
TOC-4 Welch Allyn AED 20 Users Manual 990020 – Rev. K

Preface

Welch Allyn AED20 Users Manual
WARNING! Do not attempt to use this equipment without thoroughly reading and understanding these instructions.

Manufacturer

Manufacturer MRL, Inc.
A Welch Allyn Company 1000 Asbury Drive
Buffalo Grove, IL 60089 USA (847) 520-0300
Product Name Welch Ally n AED20 Device Type Automated External Defibrillator

FDA Medical Device Registration

The FDA Safe Medical Device Act stipulates that each end­user is required under penalty of law, to register with the manufacturer all information pertinent to each medica l device.
Please fill out the enclosed FDA Medical Device Registration postcard and return it promptly to Welch Allyn.
This card must be filled in and returned within 30 days of product delivery.
If the medical device is transferred from your possession, you must notify Welch Allyn of the new registration information.

Manufacturer’s Responsibility

Welch Allyn, Inc. is responsible for the safety, reliability, and performance of the Welch Allyn AED20, only if the following conditions are met:
v Assembly operations, extensions, readjustments,
modifications, or repairs are carried out by persons authorized by Welch Allyn.
v The Welch Allyn AED20 equipment is used in accordance
with the instructions for use.

User’s Responsibility

The user is required to be trained in basic monitoring, vital signs assessment, and emergency cardiac care. The user should be completely knowledgeable of the information in the Welch Allyn AED20 Users Manual. As with all other electronic patient care monitors, good clinical judgment should be used when operating the Welch Allyn AED20. To ensure patient safety and proper operation, use only Welch Allyn-authorized parts and accessories.
ii Welch Allyn AED20 Users Manual 990020 – Rev. K
User must save all shipping containers and packaging materials. When shipping the Welch Allyn AED20 and accessories for calibration, service, or upgrades, the original shipping containers and packaging materials must be used.

Contact and Technical Support

Please contact Welch Allyn, Inc. if you have any questions regarding this notice.
Telephone 847.520.0300
Toll-free 800.462.0777
Fax 847.520.0303
Internet www.welchallyn.com

Declaration of Conformity

Manufacturer:
Medical Research Laboratories, Inc., Welch Allyn Ireland a Welch Allyn company Navan Business Park 1000 Asbury Drive Dublin Road Buffalo Grove, IL 60089 Navan, Co. Meath USA Republic of Ireland Phone (847) 520-0300 Phone 011-353-466-7775 Fax (847) 520-0303 declares that the CE-marketed product
Product Name : Welch Allyn AED20 Device Type : Defibrillator / ECG Monitor Model Number: 972200 Accessories: See list in manual
complies with Council Directive 93/42/EEC (Medical Device Directive) of June 14 1993 class IIb Annex II
Standards General: ISO 9001
EN 46001
Safety: EC 60601-1 / EN 60601-1 Class II, Type BF,
Internally Powered Continuous operation Defibrillator Proof Operation IEC 60601-1-4 / EN 60601-1-4 IEC 60601-2-4 / EN 60601-2-4 IEC 1441 / EN1441
EMC: IEC 601-1-2 / EN 60601-1-2
—————————————————————————
Joel Orlinsky Date Director of Q.A. and Regulatory Affairs
iv Welch Allyn AED20 Users Manual 990020 – Rev. K

Safety

Welch Allyn AED20 Users Manual

Conventions Used in the Manual

This section includes a list of conventions used in this manual.
Warnings
Warnings alert the user to a special condition that could result in serious personal injury or death. In this manual, warnings are displayed as shown in the following example:
WARNING! Conditions, hazards, or unsafe practices that can result in serious personal injury or death.
Cautions
Cautions alert the user to a special condition that could result in minor personal injury or damage to the equipment. In this manual, cautions are displayed as shown in the following example:
Caution
Conditions, hazards, or unsafe practices that can result in minor personal injury, damage to the Welch Allyn AED20, or loss of data.
Notes
Notes contain information that augments or clarifies an operating step. Notes do not normally contain actions. They follow the procedural steps to which they refer. In this manual, notes are displayed as shown in the following example:
¥ If the Welch Allyn AED20 is used more than once per
month, it is recommended that authorized service personnel perform a periodic inspection servicing at least once per year.
Voice Prompts
The Welch Allyn AED20 provides audio instructions through the built -in speaker to provide operating instruction and assist the user during defibrillation. In this manual, voice prompts are displayed as shown in the following example:
— Low battery
Safety information is organized in six groups:
v General Cautions and Notices v Patient Safety v Defibrillator and Electrode Pads v Battery and Charger v Care and Storage v Safety Symbols
vi Welch Allyn AED 20 Users Manual 990020 – Rev. K

General Cautions and Notices

Dropped or Damaged
If the device has been dropped or damaged in any way, refer the device to qualified service personnel for servicing.
Ferromagnetic Equipment
ECG electrodes and cables contain ferromagnetic materials. They must not be used in the presence of large magnetic fields created by magnetic resonance imaging (MRI) equipment. The large magnetic fields generated by an MRI device could move ferromagnetic equipment with an extremely violent force that could cause serious personal injury or death to persons between the equipment and the MRI device.
Labels
Observe all CAUTION and WARNING labels on the equipment and accessories.
Performance
The Welch Allyn AED20 may not meet performance specifications if stored, transported or used outside the specified storage or operating environmental range limits.
Notices
Patient Safety
General
Warning Not for use on pediatric patients
Caution Patient Physical Harm
Caution Use Automated Mode only when these
U.S. Federal law restricts this device to use by or on the order of a physician. If the battery pack is removed for any reason, labeling of the Welch Allyn AED20 is required indicating out-of-service for battery operation.
This defibrillator is not to be used on patients less than 8 years old.
Place the Welch Allyn AED20 in a position where it cannot harm the patient should it fall. Keep all cables and connectors away from the patient’s neck.
conditions have been met
Use Automated Mode only on victims of cardiac arrest who exhibit unconsciousness, absence of breathing, and absence of pulse.
Shock Hazard
Warning Defibrillation current can cause injury
Do not touch the patient during defibrillation. Do not touch equipment connected to or me tal objects in contact with the patient during defibrillation. Disconnect other electrical
viii Welch Allyn AED 20 Users Manual 990020 – Rev. K
equipment from the patient before defibrillating.
Caution Manual mode is for qualified users only
Only by qualified operators who have been trained in rhythm recognition and treatment through manual charging and delivery of defibrillation shocks. Follow all instructions in this users manual.
Burns
Warning Properly place defibrillation pads
Do not allow defibrillation pads to touch each other, or to touch other ECG electrodes, lead wires, dressings, transdermal patches, etc. Such contact can cause patient skin burns during defibrillation and may divert defibrillating current away from the heart. Remove excessive body hair, which may cause skin burns or ineffective energy transfer.
Warning Use Welch Allyn electrode monitoring
cables only
Do not replace the electrode monitoring cable with a substitute. Using any other cable may cause burns to the patient.
Electrical Energy
Warning Welch Allyn AED20 can deliver 360 joules
of electrical energy
Before charging the defibrillator, verify that the energy selected on the display is the desired output. Disconnect any medical electronic device that is not labeled
“defibrillation protected” from the patient. If this electrical ene rgy is not discharged properly, it could cause personal injury or death to the operator or bystander. During defibrillation, the operator and all other people must stand clear of the patient, bed, and all conductive surfaces in contact with the patient.
Warning Properly place defibrillation pads
Do not place electrodes near the generator of an internal pacemaker. Always apply electrodes to flat areas of skin. Avoid application over folds of skin such as those underneath the breast or on obese patients. Excessive hair, poor adhesion, or air under electrode may produce burns.
ECG Misinterpretation
Warning Properly place defibrillation pads
Improperly placed pads may produce incorrect analysis and an inappropriate shock or no shock decision advisory.
Warning Do not move patient
Handling or transporting the patient during ECG analysis can cause incorrect or delayed diagnosis. Follow all instructions in the Advanced Users Manual.
Warning Cardiac pacemakers may affect rhythm
analysis
Patient pacemakers may reduce the sensitivity of the Welch Allyn AED20 analysis and errors in detecting shockable rhythms.
x Welch Allyn AED 20 Users Manual 990020 – Rev. K
Warning Radio frequency (RF) interference
Do not operate the Welch Allyn AED20 in conjunction with electrocautery or diathermy equipment. Any equipment that emits strong radio frequency signals can cause electrical interference and distort the ECG signal to cause inaccurate interpretation of rhythm.
Caution Do not use the electrode monitoring cable
for Automatic Rhythm Analysis
Proper skin preparation and the use of fresh, high-quality monitoring electrodes are imperative to minimize artifact when using the electrode monitoring cable.

Defibrillator and Electrode Pads

Explosion
Warning Explosion hazard
Do not use the Welch Allyn AED20 in the presence of flammable anesthetics or concentrated oxygen.
Electrical Shock or Fire Hazard
Warning No internal, operator -serviceable parts
Do not open unit, remove covers or attempt to repair the Welch Allyn AED20. All servicing must be performed by qualified personnel.
Warning Improper use can cause injury
The Welch Allyn AED20 contains an automatic disarm of the stored energy. If the operator has not delivered the energy to a patient or a test load, an internal timer will disarm the stored energy. This stored electrical energy can potentially cause death or injury if discharged improperly. Follow all instructions in this users manual.
Caution Do not immerse or expose the Welch Allyn
AED20 to water or other liquids
Do not use the defibrillator if unit has been immersed in liquid or if excessive condensation is visible on the device.
Caution Conductive parts should not contact other
conductive parts including the earth
Improper Device Performance
Warning Use only Welch Allyn-approved accessories
Do not use defibrillation pads , batteries, and other accessories not approved by Welch Allyn. Use of unauthorized accessories may cause the device to operate improperly and provide false measurements. Follow all labeling instructions on the defibrillation pads and the rechargeable battery.
Warning Do not administer a shock using the
electrode monitoring cable .
The electrode monitoring cable has protective circuitry that prevents defibrillation energy from being delivered to the patient. Always check the expiration date on defibrillation
xii Welch Allyn AED 20 Users Manual 990020 – Rev. K
pads. Do not use pads if the packaging has been previously opened. The Welch Allyn AED20 may interpret excessively dry defibrillation pads as an attached electrode monitoring cable.
Caution Do not repeatedly charge and discharge
defibrillator in rapid succession
If a need for repetitive testing arises, wait at least 1 minute for every third discharge to avoid damaging equipment.
Caution Improper maintenance can cause improper
performance
Follow instructions in the Advanced Users Manual.
Caution Use Manual Mode properly
In the manual mode, if a new energy level is selected after the charge button is pushed and while the defibrillator is charging, the defibrillator will automatically charge to the new energy selection. The CHARGE button need not be pressed again to select the new energy level.

Battery and Charger

Battery Care
Caution Battery is shipped discharged
Charge rechargeable battery fully before use.
Caution Use only Welch Allyn PowerStick batteries
Use either the rechargeable NiMH PowerStick or the non-rechargeable Lithium PowerStick. Use of any other battery can damage the Welch Allyn AED20.
Caution Make sure the rechargeable battery is fully
charged
Loss of power during patient care could result in injury. Always have a fully charged back­up battery available.
Caution Never attempt to recharge a non-
rechargeable battery.
Caution Check capacity of a non-rechargeable
battery after each use
Replace battery if “Low Battery” is indicated.
Caution Replace rechargeable battery at 24 months
Battery replacement at 24 months is recommended due to degradation of the battery chemistry. Periodic maintenance and testing is highly recommended to ensure proper battery performance.
Charger Care
Caution Use the battery charger to maintain a full
battery charge
Make sure the charger is plugged into an AC power source. Keep the charger in a dry, moisture-free location, away from direct sunlight or other heat sources. Do not block the ventilation slots or remove the cover.
xiv Welch Allyn AED 20 Users Manual 990020 – Rev. K

Care and Storage

Cleaning and Sterilization
Caution Clean and maintain the Welch Allyn AED20
according to instructions.
See Chapter 4, Maintaining the Welch Allyn AED20.
Do not clean the Welch Allyn AED20 with alcohol, ketone, or any flammable agent. Do not autoclave the Welch Allyn AED20 or attempt to sterilize the Welch Allyn AED20 or any of its accessories.
Electrodes
Warning Follow manufacturer’s instructions for use
of defibrillation electrodes
Improper use of defibrillation electrodes may cause the Welch Allyn AED20 to function improperly or may cause skin burns. Do not use expired, dry electrodes. Do not reuse disposable electrodes. When obtaining a new supply, verify that the electrodes connect properly to the Welch Allyn AED20 prior to putting them into service.
Caution Properly store and use defibrillation pads
Store electrodes in a cool, dry location (between 60° and 95°F or 15° and 35 °C.). Do not sterilize the pads, immerse, or clean the electrodes with alcohol or solvents.

Safety Symbols

Graphical symbols, letter symbols, and signs listed below may be found on the Welch Allyn AED20 and accessories. Please note the use of these symbols for safe and proper use of the equipment. For a list of icons that display operating status information, see Chapter 1 Introducing the WELCH ALLYN AED.
Attention, consult accompanying documents
Auxiliary power operation
Caution, high voltage Positive input terminal
Dangerous voltage
Defibrillator protected, type BF patient connection
Earth (ground)
Negative input terminal
Recycle battery
xvi Welch Allyn AED 20 Users Manual 990020 – Rev. K
Chapter 1

Introducing the Welch Allyn AED20

Welch Allyn AED20 Users Manual
This chapter provides an introduction to the Welch Allyn AED20 system and presents an overview of the Welch Allyn AED20 controls, indicators, displays, and prompts. It also provides instructions for getting the Welch Allyn AED20 ready for use and preparing the unit for storage.
Overview of the Welch Allyn AED20 1-3
Features .......................................................................................1-3
Systems Upgrades and Options..............................................1-4
Qualified Operators ....................................................................1-4
Getting the Welch Allyn AED20 Ready 1-5
Unpacking and Inspecting.........................................................1-5
Installing the Battery...................................................................1-5
Running the Self -Test................................................................1-7
Getting to Know the Welch Allyn AED20 1-8
Welch Allyn AED20 Configurations .........................................1-8
Functions......................................................................................1-9
Controls..............................................................................1-10
Display................................................................................1-11
Text Prompts .....................................................................1-13
Voice Prompts...................................................................1-14
Icons...................................................................................1-16
System Ready Indicator..................................................1-18
Serial Data Port................................................................1-19
Event Documentation......................................................1-19
Battery Charging and Conditioning 1-19
The Welch Allyn Quick Charger/Conditioner.......................1-20
Charging a Battery...................................................................1-21
Conditioning a Battery.............................................................1-21
The Alternate Welch Allyn Quick Charger/Conditioner...…1-22
Preparing the Welch Allyn AED20 for Storage 1-24
Welch Allyn AED20 Accessories Part List 1-25
1-2 Welch Allyn AED20 Users Manual 990020 – Rev .K

Overview of the Welch Allyn AED20

The Welch Allyn AED20 (automated external defibrillator) is a safe, easy to use defibrillation device designed for use by basic life support (BLS) personnel. The unit is lightweight and mobile and can be used in situations where there could be several minutes before the arrival of advanced life support (ALS) personnel.
The Welch Allyn AED20 recognizes ventricular fibrillation and other ventricular tachycardia and guides operators through the defibrillation process. When properly connected to a patient who is unconscious, not breathing, and without a pulse, the Welch Allyn AED20 analyzes the patient’s heart rhythm, provides text and audio instruction prompts, determines if a shockable situation exists, and, if appropriate, automatically arms the Shock button.
The Welch Allyn AED20 delivers the defibrillation shock through two self-adhesive, pre-gelled, low -impedance electrode defibrillator pads. The pads, cable, and connector are sold as disposable kits.
The Welch Allyn AED conforms to the AAMI DF39, AHA
Scientific Statement AED: Specifying and Reporting Arrhythmia Analysis Algorithm Performance, and the IEC
standard 601-2-04 for AEDs currently under development.

Features

Welch Allyn AED20 features in clude:
v 3-step operation v extensive voice and visual prompts for the operator v continuous ECG, audio, and event recording for reporting
each use to a printer or computer
v daily self -test to ensure readiness v rechargeable battery v biphasic energy output v lock -out protection to prevent inadvertent defibrillation

System Upgrades and Options

The Welch Allyn AED20 is an automated external defibrillator designed for easy operation. However, It is designed so that optional features can be added as simple software upgr ades.
Display options include providing an ECG trace in automated mode, showing a biphasic defibrillation waveform, and on-screen log data review. Another option allows the unit to be switched from automated mode to manual mode. Manual mode allows qualified users to set the defibrillation energy level, charge the unit, and deliver a shock.

Qualified Operators

The Welch Allyn AED permits trained users to administer a brief electrical shock to patients experiencing fibrillation or sudden cardiac arrest (SCA).
A qualified operator is someone who has successfully completed a CPR AED training course (e.g., AHA Heartsaver course or the Red Cross CPR/AED course).
1-4 Welch Allyn AED20 Users Manual 990020 – Rev .K

Getting the Welch Allyn AED20 Ready

Carefully unpack and inspect all the Welch Allyn AED20 system c omponents and accessories. If using the rechargeable NiMH PowerStick battery, charge the battery fully before installing it. Install the battery, run the self-test, and set the date and time (see chapter 3 for instructions) before putting the unit into ser vice.

Unpacking and Inspecting

Visually inspect the carton for any signs of damage or mishandling (carton perforations, cuts, or dents; bent or collapsed corners; or broken carton seal). Remove the Welch Allyn AED from the carton and inspect it carefully.
Before proceeding:
1. Open and carefully unpack each carton.
2. Examine the instruments and accessories for signs of damage.
3. Check the packing list to determine that all accessories have been received.
4. Contact Welch Allyn, Inc. Service Department at
847.520.0300 if anything looks damaged or is missing.

Installing the Battery

The Welch Allyn AED20 can use either a NiMH (Nickel Metal Hydride) PowerStick rechargeable battery or an extended-life, Lithium PowerStick non-rechargeable battery.
v Use the NiMH PowerStick rechargeable battery for
battery ready
applications involving frequent use.
v Use the Lithium PowerStick non-rechargeable battery for
standby use.
The battery slides into the AED case and locks firmly in place. The battery forms the carrying handle of the We lch Allyn AED20 and therefore, you can always be sure that the battery is properly installed.
¥ Using a non-rechargeable battery for training or
testing will reduce the shelf -life and operating time of the battery.
To install the battery:
1. Align the thin, flat end of the battery with the opening in the lower front portion of the Welch Allyn AED case.
2. Push the battery in until it “clicks” and locks into place.
indicator
1-6 Welch Allyn AED20 Users Manual 990020 – Rev .K
3. Make sure the battery ready indicator in the
battery lock release
lower left of the display indicates tha t the battery has the sufficient charge. If the status indicator displays anything other than the Battery Ready icon, the Welch Allyn AED20 is not ready for use.
To replace the battery:
1. Push the lock release on the bottom of the Welch Allyn AED case where the battery inserts into the unit.
2. Replace the battery with a backup. Recharge the removed battery, if it is a rechargeable battery.

Running a Self-Test

After installing the battery, press the ON button to power-up the Welch Allyn AED and automatically perform a self-test. At power -up, the following tests are performed: battery, main processor, memory and program, stuck key, ECG preamp, and defibrillator.

Getting to Know the Welch Allyn AED20

The Welch Allyn AED20 is an automated exter nal defibrillation (AED) device designed for use by trained personnel. It features a straightforward, three -step operating design that uses extensive voice and visual prompts to assist the operator. With continuous ECG, audio, and event recording, the Welc h Allyn AED20 maintains a detailed log that can be viewed on screen or reported directly to a computer or printer.

Welch Allyn AED20 Configurations

Three Welch Allyn AED configurations are available: Primary AED, Secondary AED, and Manual AED.
Primary AED In this configuration, the unit provides
automated text and voice prompts to guide the operator. It does not have an ECG tracing capability on the display.
Secondary AED This configuration requires the optional ECG
display upgrade. Automated Text and voice prompts are provided and a continuous ECG tracing displays on the LCD during operation.
Manual AED This configuration requires the optional ECG
display and Manual mode upgrades. This configuration includes automated text and voice prompts and an ECG tracing display. In addition, an authorized operator/supervisor with the proper pass code can manually override the automated operation of the AED. This allows the user to manually select energy settings and administer defibrillation shocks.
1-8 Welch Allyn AED20 Users Manual 990020 – Rev .K

Functions

menu selection
system power switch
battery ready
defibrillator pads
connector
This section describes the following Welch Allyn AED features:
v Controls v Display v Text Prompts v Voice Prompts v Icons v System Ready Indicator v Serial Data Port v Event Documentation
Detailed information on using, programming, and maintaining the Welch Allyn AED are presented in Chapters 2, 3, and 4, respectively.
display
buttons
indicator
ON/OFF
shock button
speaker
battery
serial data port
Controls
1 power on
2 3
The Welch Allyn AED20 is designed for ease of operation. After putting the defibrillator pads on the patient and connecting them to the Welch Allyn AED unit, the operator performs this simple three-step process:
1 Turn the power ON. 2 Follow text prompts on the screen and voice prompts from
the speaker.
3 If prompted, deliver shock by pressing the flashing red
Shock button.
text and
voice prompts
shock
Power ON/OFF Green ON/OFF button to toggle system
power on/off
Shock Red Shock button to discharge defibrillator;
red LED flashes when defibrillator is fully charged
Menu selection Four soft buttons located in the case below
the display; programmable functionality to make menu selections in manual mode
1-10 Welch Allyn AED20 Users Manual 990020 – Rev .K
Display
Text prompts, patient data, and event information display on the liquid crystal display (LCD) screen. The display is a VGA, monochrome liquid crystal display (LCD) measuring 320 x 240 pixels. The display is divided into ten functional areas. Operating information and user instructions display in these areas.
elapsed time heart rate shocks counter
ECG trace window
menu
selection
window
prompts window
icons window defib window
menu bar
energy
bar
The table below explains the function of each area.
Shocks Counter Displays the number of shocks
administered.
Defib Window Displays the energy level selected or
delivered. Also displays status messages.
ECG Trace
(ECG or manual mode add-on option)
Prompts Displays up to three lines of text (user
Elapsed Time Displays the time elapsed since the
Energy Bar
(Manual Mode only)
Heart Rate
(ECG or Manual Mode add-on option)
Icons Displays operating status icons. See
Displays ECG trace as a moving waveform, if option is installed. If the defib pads are not properly attached to the patient or connected to the unit, a dashed line is drawn.
instructions, directions for patient care, error messages). See descriptions below.
system was powered ON, or time used on current patient. The ti me format is HH:MM:SS.
Temporary window located to the right of the ECG Trace when the Charge button is pressed or a shock advised situation is detected. The selected energy level is highlighted.
Displays number representing heart rate (beats/minute). Dashed line displays when rate is out of range or when defib pad fault exists.
descriptions below.
Menu Bar
Menu Selection Displays Manual Mode or Supervisor Mode
1-12 Welch Allyn AED20 Users Manual 990020 – Rev .K
Displays four areas corres ponding to four buttons on the case below the LCD.
menu choices. See Chapter 3.
If the optional ECG or manual mode upgrade is installed, an electrocardiogram trace is also displayed on a continuous basis. Graphical screen icons provide system operational information. The Welch Allyn AED20 operator or supervisor can use a simple menu -driven structure to set charge protocols and system configurations, set system operating parameters such as display c ontrast and volume, select the language used for text and voice, and install upgrade options.
Text Prompts
Text prompts provide operating information and instructions. The prompts display in the lower half of the LCD above the icon window.
Text Prompts Descriptions
ANALYZING PADS ECG leads are properly connected and
the system is accessing the patient's heart rhythm.
ATTACH DEFIB PADS Attach the defibrillation pads according
to the instructions given on the package.
CHARGING System is automatically charging the
defibrillator to the energy level pre-set
in the shock protocol. CHECK PATIENT Prompt to press the Analyze button CHECK PULSE Check the patient's pulse. IF NO PULSE -
START CPR MONITORING ECG,
PRESS TO ANALYZE
Check the patient's pulse and begin a
60-second CPR cycle.
AED is silently monitoring the patient’s
heart rhythm and will perform a full
Text Prompts Descriptions
analysis if the Analyze button is pressed.
MOTION DETECTED System has detected movement of the
electrodes or the patient as indicated by inconsistent data readings.
NO SHOCK ADVISED System has analyzed the patient’s
heart rhythm and determined that a shockable condition does not exist.
SHOCK ADVISED System has analyzed the patient’s
heart rhythm and determined that a
shockable condition exists. SHOCK NOW Prepare to administer the shock. STAND CLEAR Defibrillator is charged and ready for
shock. Do not touch or move the
patient.
Voice Prompts
The Welch Allyn AED voice prompt feature provides instructional prompts to guide the user through the defibrillation process without relying solely on text prompts.
The Welch Allyn AED provides audio instructions through the built-in speaker to provide operating instruction and assist the user during defibrillation. The voice prompts listed in the following table parallel the text and icon displays shown on the LCD.
¥ In the following table, the voice prompts in brackets
are for the UK version of the Welch Allyn AED20 only.
1-14 Welch Allyn AED20 Users Manual 990020 – Rev .K
Voice Prompt Description
Analyzing heart rhythm, do not touch the
Defibrillator pads properly attached and connected; assessing heart rhythm
patient Analyzing interrupted,
Patient or electrode moved
motion detected Check airway, check
breathing, check pulse
Check patient’s airway, breathing and
pulse [Check airway, check breathing, check circulation]
Check Patient Prompt to press the Analyze button Apply defib pads to
patient’s bare chest, connect pad to cable
Apply defib pads, connect cable
Attach electrode pads to the patient
and connect cables to the Welch Allyn
AED (prompt at unit power up)
Defibrillator pads are not properly
attached to the patient or properly
connected to the Welch Allyn AED If no pulse Start CPR
[Begin CPR]
Check the patient’s pulse and begin
60-second CPR cycle Low battery Low battery charge. Replace battery. Memory Card full Internal memory card full No shock advised Shockable condition does not exist Shock advised Shockable condition exists Shock now, press the
Push the red SHOCK button red button now
Stand clear Defibrillator charged and ready to
shock; do not touch or move patient
Stop CPR Stop CPR, wait for further instructions It is safe to touch the
patient Change to pads Electrode monitoring cable is attached,
Shock not delivered Attempted shock did not deliver any
Defibrillator shock has been delivered
change to defibrillator pads
energy to the patient
Icons
Icons provide operating status information. The icons are displayed at the bottom of the LCD just above the menu bar.
Icon Name
Auxiliary Power
- +
- +
- +
Battery Level Indicator
Battery Level Indicator
Battery Level Indicator
Battery Level Indicator
Battery Level Indicator
Contrast Indicates the level of contrast;
2
Indicates the optional auxiliary power unit is plugged in.
Indicates the charge left in the battery is full.
Indicates the charge left in the battery is partially depleted.
Indicates the charge left in the battery is low.
Indicates non-rechargeable, single use battery.
Indicates rechargeable battery.
levels are 1 through 9.
Description
CPR timer
0 60
Log
E F
1-16 Welch Allyn AED20 Users Manual 990020 – Rev .K
CPR Timer Represents a user adjustable
second clock used to time CPR.
Log Level Indicates the amount of memory
remaining for entries in to the log.
Icon Name
Description
Card
E F
Memory Card Level
Printer Status Indicates log printing. Flashing
Volume Indicates the speaker volume;
Lock Memory card locked.
Recording Memory card is recording.
Indicate s the amount of memory remaining for entries in to the optional Memory Card.
icon indicates printer error.
4 levels are indicated.
System ready
indicator
System Ready Indicator
The battery ready indicator display, located on the lower left corner of the Welch Allyn AED, represents the operational readiness of the battery.
Ready Battery is properly installed,
charged, and system is ready for use.
Do Not Use System is not ready for use. Battery
may not be properly installed, battery charge is too low for effective operation, or system failure.
Flashing Battery is low and requires
changing.
1-18 Welch Allyn AED20 Users Manual 990020 – Rev .K
Serial Data Port
The built-in Serial Data Port provides a direct connection to a computer or printer.
Event Documentation
The Welch Allyn AED stores event documentation including patient status, ECG traces, and treatment summary. The information is stored in an internal log or an optional PCMCIA external memory card. Event documentation is time stamped and can be downloaded to a printer or to a computer through the serial port on the Welch Allyn AED.

Battery Charging and Conditioning

¥ This section provides procedures for charging and
conditioning the NiMH PowerStick rechargeable battery. Do not attempt to recharge the Lithium PowerStick non-rechargeable battery.
Battery maintenance is critical to ensure that the Welch Allyn AED20 operates reliably. Periodically check the battery to ensure that the recommended replacement date has not elapsed. Over time and through use, the capacity of a battery will degrade. Properly maintaining a battery is crucial to maximizing the battery’s capacity throughout its life. The amount of capacity degradation varies from battery to battery due to the conditions in which the batteries are used and maintained. An old Powerstick rechargeable battery should be replaced with a new one every 24 months.
¥ A completely discharged battery will require
Run
Fail
Condition
approximately 1.5 to 2 hours to recharge. Charging time varies depending on battery capacity and state of charge. Deeply discharged batteries and those with higher capacity will take longer to charge. Partially discharged batteries and those with lower capacity will require less time to charge.

The Welch Allyn Quick Charger/Conditioner

¥ Please refer to the picture seen below. If the controls
on your charger are different than the ones shown here, see “The Alternate Welch Allyn Quick Charge/Conditioner” section below.
The Welch Allyn Quick Charger/Conditioner is easy to use. The PowerStick is inserted directly into the charger, and status lights indicate the condition of the battery.
Yellow (charging) Yellow blinking (discharging)
Green (charge completed)
Ready
Red (Battery faulty, Charge aborted)
Must be selected within 5 seconds of battery insertion
1-20 Welch Allyn AED20 Users Manual 990020 – Rev .K

Charging a Battery

To charge a battery using the Welch Allyn Quick Charger/Conditioner:
1. Insert the battery into the charger. When the
battery is firmly seated, the yellow RUN light illuminates.
2. Monitor the status lights. A steady yellow
Run light means the battery is charging. A red Fail light means that the battery is not charging due to a fault condition
3. The Run light will turn off and the green Ready light will turn on to indicate that the battery is fully charged.
¥ Charging battery at temperatures above 30ºC (86ºF)
increases the charging time and may result in a gradual decline in battery capacity.
¥ When removing a battery from the charger, always
allow at least 3-5 seconds for the system to reset prior to inserting another battery.

Conditioning a Battery

The effective life of the NiMH PowerStick battery can be prolonged by periodic conditioning.
To initiate a battery conditioning cycle:
1. Insert the battery into the charger.
2. Press the conditioning button on the charger
Green (ready)
Yellow (condition)
Yellow flashing (fault/condition)
control panel within 5 seconds of insertion. The yellow Run light blinks as the battery is being discharged.
¥ At the end of the conditioning, the charger
automatically begins a normal charge cycle.
3. Monitor the charging light. The yellow
Run light turns off and the green Ready light turns on when the battery is fully charged.

The Alternate Welch Allyn Quick Charger/Conditioner

The Alternate Welch Allyn Quick Charger/Conditioner is easy to use. The PowerStick is inserted directly into the charger. Status lights indicate the condition of the battery.
Yellow (charging)
Power
Ready or Conditioning Charge or Fault/Condition
Conditioning
Charging a Battery
To charge a battery using the Welch Allyn Quick Charger/Conditioner:
1-22 Welch Allyn AED20 Users Manual 990020 – Rev .K
1. Insert the battery into the charger. When the battery is firmly seated, the yellow Charge light illuminates.
2. Monitor the charging light. Steady yellow means charging. Flashing yellow means that the battery is not charging due to a Fault condition.
3. The Charge light turns off and the green Ready light turns on when the battery is fully charged.
¥ Charging battery at temperatures above 30ºC (86ºF)
increases the charging time and may result in a gradual decline in battery capacity.
¥ When removing a battery from the charger, always
allow at least 3-5 seconds for the system to reset prior to inserting another battery.
Conditioning a Battery
The effective life of the NiMH PowerStick battery can be prolonged by periodic conditioning.
To initiate a battery conditioning cycle:
1. Insert the battery into the charger.
2. Press the conditioning button on the charger control panel. The yellow ready­conditioning light illuminates solid and the yellow charge/fault/conditioning flashes.
¥ At the end of the conditioning, the charger
automatically begins a normal charge cycle.
3. Monitor the charging light. The Charge light turns off and the green Ready light turns on when the battery is fully charged.

Preparing the Welch Allyn AED20 for Storage

After each use, any event documentation should be retrieved from the internal log or external memory card and printed. Any error messages or malfunctions should be reported and corrective actions taken before storing the unit for reuse. Then, the Welch Allyn AED should be inspected, cleaned, and a new supply of electrode pads restocked to prepare the unit for its next use.
During storage, the Welch Allyn AED performs periodic self-tests including the functionality of the unit and the status of the battery and internal circuitry. A more detailed test of the unit's operation and battery status should be performed on a regular basis. See Chapter 4 Maintaining the Welch Allyn AED for more information.
1-24 Welch Allyn AED20 Users Manual 990020 – Rev .K

Welch Allyn AED20 Accessories Part List

Welch Allyn AED20
970200 Welch Allyn AED with two defibrillation pads and operations
manual.
Welch Allyn AED20 Options
970201 ECG Display 970202 Manual Override with ECG Display (970201) 970203 Log Review
Welch Allyn AED20 Accessories
001829 Welch Allyn PowerStick - Rechargeable battery 001830 Welch Allyn PowerStick - Non-rechargeable battery
981125E Battery Charger, 1Bay (to be used with 001829) 981123E Battery Charger, 2Bay (to be used with 001829)
900216 Welch Allyn AED Carrying Case 001855 Multipurpose Defibrillation Pads (10 pair / box) 002119 Welch Allyn AED Parallel Communications Kit 002120 Welch Allyn AED PC Data Transfer / Serial Comm Kit 002128 IEC Electrode Monitoring Cable 002130 AHA Electrode Monitoring Cable
980136 Welch Allyn Cardiolog Datacard – 4 MB 980143 Welch Allyn AED Trainer 001910 Welch Allyn Smartview Software Review Program
001962 Welch Allyn Smartlink Software 980139 Welch Allyn Patient Simulator 900165 Data Printer
Chapter 2

Using the Welch Allyn AED20

Welch Allyn AED20 Users Manual
This chapter provides information for using the Welch Allyn AED20 with a patient. It also provides the instructions for operating Welch Allyn AED20 in automated or manual mode and the procedures to follow after using the unit.
Overview 2-3
Trained Operator s.......................................................................2-3
Fibrillation and Defibrillation......................................................2-3
Indications and Contraindications for Use ..............................2-4
Indications............................................................................2-5
Contraindication..................................................................2-5
Welch Allyn AED20 Operating Procedures-Quick Reference 2-6
Automated Mode .........................................................................2-6
Manual Mode...............................................................................2-7
Welch Allyn AED20 Operating Procedures-Detailed Information 2-8
Assess the Patient ......................................................................2-8
Start the Welch Allyn AED20....................................................2-8
Attach the Electrode Pads and Connecting Cable................2-9
Analyze Patient’s Heart Rhythm.............................................2-12
Deliver Shock —Automated Mode.........................................2-13
Deliver Shock —Manual Mode...............................................2-15
Enter Manual Mode..........................................................2-15
990020 – Rev K Using the Welch Allyn AED20 2-1
Select the Energy Level................................................. 2-16
Charge the Defibrillator ....................................................2-16
Disarm the Defibrillator............................................................2-18
Perform CPR.............................................................................2-18
EMS Mode .................................................................................2-19
Electrode Monitoring (option).................................................2-22
Post-Use Procedures 2-28

Overview

Trained Operators

The Welch Allyn AED20 is capable of operating in an automated and in a manual mode. In either mode, the operator must be trained to use the unit and understand the indications and contraindications for use.
The Welch Allyn AED20 is intended to treat patients in cardiopulmonary arrest. It is for use in either in -hospital or out-of-hospital arrests. It is intended that the operator is authorized by a physician/medical director, and has the following training skills:
Manual Mode:
v American Heart Association Advanced Cardiac Life
Support certification or equivalent.
v Training in the use of the Welch Allyn AED20.
Automated Mode:
v American Heart Association Heartsaver course, American
Red Cross CPR/AED course or equivalent
v Training in the use of the Welch Allyn AED20.

Fibrillation and Defibrillation

Ordinarily the heart produces regular electrical activity — normal sinus rhythm (NSR). Fibrillation is an abnormal heart rhythm that replaces the normal rhythmic contraction of the heart. During fibrillation, irregular cardiac electrical activity causes rapid, uncoordinated twitching movements.
As a result, the heart cannot pump blood effectively causing a lack of appropriate circulation and pulse.
Defibrillation is the delivery of a brief, high-energy pulse of electricity to the heart muscle using a device called a defibrillator. Defibrillation restores the normal cardiac electrical activity and allows the heart’s natural pacemaker areas to regain normal function.
The Welch Allyn AED20, using direct current, applies a brief, high-energy pulse of electricity to the heart to counteract fibrillation of the heart muscle and restore a normal heartbeat.
The Welch Allyn AED20 will only administer a defibrillation pulse to a patient exhibiting a shockable cardiac rhythm. Shockable rhythms are described in Appendix A. A ll other rhythms are determined “non­shockable” and the patient is not a candidate for defibrillation. Cardiopulmonary resuscitation (CPR), medication, and supplemental oxygen may also be required to effectively resuscitate the patient.

Indications and Con traindications for Use

Once the Welch Allyn AED20 is connected via the defibrillation electrode pads to the patient, the instrument assesses the patient’s cardiac status and indicates whether the patient is a candidate for defibrillation. The Welch Allyn AED20 will only administer a defibrillation pulse (shock) to a patient exhibiting a shockable cardiac rhythm. All other rhythms are non -shockable and the patient is not a candidate for defibrillation. Cardiopulmonary resuscitation (CPR), medication, and sup plemental oxygen may also be required to
effectively resuscitate a patient. This defibrillator should not be used in automated mode on patients less than 8 years old.
Defibrillation may be effective against cardiac arrhythmias such as:
v Cardiac arrest v Ventricular fibrillation v Ventricular tachycardia
The biphasic waveform employed by the Welch Allyn AED20 has not been clinically tested on pediatric patients. The Welch Allyn AED20 has not been evaluated for cardioversion of atrial fibrillation.
Indications
Prior to using the Welch Allyn AED20, the patient should be assessed by a trained person as described on page 2-3. If defibrillation with the Welch Allyn AED20 is indicated, all of the following signs should be present during patient assessment:
v Unconsciousness v Absence of breathing v Absence of pulse
Contraindications
The Welch Allyn AED20 should NOT be used if the patient exhibits any of the following signs:
v Patient is conscious v Patient is breathing v Patient has a pulse

Welch Allyn AED20 Operating Procedures — Quick Reference

The following instructions provide an experienced operator with the main steps for using the Welch Allyn AED20 in Automated Mode and Manual Mode. Detailed operating information and procedures are given in the next subsection (pages 2-8 t hrough 2-18.)
Automated Mode - Quick Reference
Assess the Patient
See the instructions in the detailed information in the next subsection (page 2-8).
Attach Electrodes
See the instructions in the detailed information in the next subsection (page 2-9).
Start the Welch Allyn AED20 and Deliver a Shock
1. Push the green ON/OFF button located at
the upper right corner of the Welch Allyn AED20 next to the large number “1”.
2. Listen to voice prompts and read text instructions on the screen next to the large number "2 ".
3. If prompted press the red Shock button next to the large number "3".
Perform CPR, if prompted.
Manual Mode - Quick Reference
Assess the Patient
See the instructions in the detailed information in the next subsection (page 2-8).
Attach the Electrode Pads and Connect the Cable
See the instructions in the detailed information in the next subsection (page 2-9).
Start the Welch Allyn AED20 and Deliver a Shock
1. Push the green ON/OFF button located at
the upper right corner of the Welch Allyn AED20 ne xt to the large number “1”.
2. Press the button below Manual to display
the manual mode password screen.
3. Enter the numeric manual mode passcode.
Press Enter to accept the passcode and display the Manual Mode operating screen.
4. Select energy with the up and down arrows.
5. Press the Charge button.
6. Press the red flashing Shock button next to the large number "3" to deliver the shock.

Welch Allyn AED20 Operating Procedures – Detailed Information

The Quick Reference operating procedures in the preceding subsection provide the main steps when operating the Welch Allyn AED20 in Automated or Manual Mode.
v Assess the Patient v Start the Welch Allyn AED20 v Attach the Electrodes and Connect the Cable v Analyze Patient’s Heart Rhythm v Deliver the Shock (Automate d or Manual Mode) v Perform CPR
For each step, detailed operating information or procedures follow.

Assess the Patient

Before using the Welch Allyn AED20, assess the patient’s condition. Use the unit only if all of the following patient signs are present:
v Unconsciousness v Absence of breathing v Absence of pulse

Start the Welch Allyn AED20

Push the green ON/OFF button next to the large number “1” to power-on the Welch Allyn AED20. The unit will start in Automated Mode.
To operate the unit in Manual Mode, pr ess the button below Manual on the status bar to display the manual mode passcode screen. Use the buttons below the arrows on display to select the numeric passcode. Press the button below Enter to accept the passcode and display the manual mode operating screen.
ON/OFF button

Attach the Electrode Pads and Connect the Cable

For defibrillation to be effective, it is important to correctly place the pads on the patient and connect the electrodes to the Welch Allyn AED20.
Before applying pads to the patient’s chest be sure to:
v Remove all clothing covering chest v Wipe off any water, moisture, or perspiration v Press the pads firmly to make sure they adhere securely to
the chest.
WARNING! Excessive body hair may affect the operation of the electrodes or cause skin burns on the patient. Remove body hair as needed to ensure that the electrode pads make proper contact with the patient's chest.
To attach electrodes and connect cable:
1. Open the package containing the defibrillation pads and cable.
2. Peel off the backing from the electrode pad labeled RA. Place this pad just below the patient’s right collar bone (sternum).
3. Peel off the backing from the electrode pad
connect cable from
Manual
-
+
labeled LL. Place this pad over the ribs on the patient’s left side below the breast (apex).
4. Plug the pad connector into the Welch Allyn AED20 on the left side of the unit.
defib pads
5. Check the battery level icon above the Menu bar on the display screen to make sure there is sufficient power to charge the defibrillator.
battery level icon
00:12:53 Shocks: 0
Log
E F
180
SELF TEST PASSED
Supervisor
HR
system ready indicator
If pads are not properly applied or the cable is not properly connected to the Welch Allyn AED20, it will alert the user with text and voice.
— Apply pads to patient’s bare
chest, connect defib pads to cable

Analyze Patient’s Heart Rhythm

When the pads are properly applied and conne cted, the Welch Allyn AED20 announces then automatically analyzes the patient's heart rhythm to determine if a shock is indicated.
— Analyzing heart rhythm. Do not
touch the patient
Caution
Do not touch or move the patient while the Welch Allyn AED20 is analyzing the heart rhythm.
Rhythm analysis takes approximately 12-16 seconds. During this time, any movement, including CPR and patient transport, may interrupt analysis and delay the defibrillation prompts. Text and voice prompt will alert user if patient or electrodes move.
— Analyzing interrupted, motion
detected

Deliver Shock — Automated Mode

The Welch Allyn AED20 will only administer a shock to a patient exhibiting a shockable cardiac rhythm. All other rhythms are determined “non -shockable” and therefore the patient is not a candidate for defibrillation.
If it is not a shockable condition, the Welch Allyn AED20 will alert the user with text and voice.
— No shock advised
If a shockable condition is detected, the Welch Allyn AED20 will alert user with text and voice.
— Shock advised
To deliver a shock:
1. Make sure the Shock button next to the large number “3” is flashing. This indicates that the unit is properly charged.
WARNING! Make sure no one is touching the patient before you press the Shock button. Loudly announce,
“Stand back! Do not touch the patient.” and look down the entire length of the patient to ensure there is no contact with a bystander or conductive surface before pressing the Shock button.
— Stand clear
— Shock now, press the red button
now
2. Push Shock to deliver a shock.
Shock button
¥ The Welch Allyn AED20 will not allow the operator
to charge or discharge the defibrillator unless a shockable rhythm is detected while in automated mode.
After delivering a shock, the Welch Allyn AED20 continues to analyze the heart rhythm and determines whether additional shocks are indicated. The unit is programmed for a supervisor -configurable protocol that indicates the number of shocks delivered, the energy of each shock, and possible CPR interventions.

Deliver Shock — Manual Mode

The Welch Allyn AED20 can operate as a manual AED when it is configured with the manual mode options.
Enter Manual Mode
When the power is on the Welch Allyn AED20 starts in automated mode. It may be switched to manual mode at anytime dur ing the use in automated mode by pressing the Manual button and entering a password. Press Enter to accept the manual mode password. If the number is correct, the manual mode operating screen displays.
From the manual mode screen, the operator can Charge or Disarm the defibrillator and adjust the energy level of the charge to be delivered.
Select Energy Level
Press the buttons under the up/down energy arrows to increase or decrease the energy level of the charge. The energy charge levels available are : 2, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200, 300, and 360 Joules. The energy level selected displays is the lower right corner of the LCD.
Charge Defibrillator
Press the Charge button to charge the defibrillator. An intermittent tone will sound as the defibrillator charges. A bar will extend upwards on the right side of the display until it reaches the selected energy level. Once the selected energy level is reached, a solid tone will sound and the red Shock button will flash.
¥ Charge time is approxima tely 8 seconds. The unit is
capable of delivering back-to-back shocks in less than 30 seconds.
00: 00: 00
+-
Log
E F
Energy Energy Charge
Select energy
HR ---
Menu
Shocks: 0
Disarm
Charge and/or disarm defibrillator
300J
Menu
360 300 200 150 100
70 50 30 20 10
7 5 2
Selected energy
Charging bar
Selected energy
To deliver a shock:
1. Make sure the Shock button next to the large number “3” is flashing. This indicates that the unit is properly charged.
2. Push Shock to deliver a shock.
Shock button
WARNING! Make sure no one is touching the patient before you press the Shock button. Loudly announce, “Stand back! Do not touch the patient.” and look down the entire length of the patient to ensure there is no contact before pressing the Shock button.
After delivering a shock, the Welch Allyn AED20 continues to analyze the heart rhythm and prompts the operator if additional shocks are indicated.

Defibrillator Disarm

If the defibrillator is charged and the Shock button is not pressed, the Welch Allyn AED20 must be disarmed.
v The unit will automatically discharge in Automated Mode
(30 seconds) or Manual Mode (60 seconds). In Automated Mode after 25 seconds, there will be a warning tone to indicate that the defibrillator will disarm automatically.
v In Manual Mode, the operator can disarm the defibrillator
by pressing the Disarm button.
v The operator can press the ON/OFF button and turn off
the unit.

Perform CPR

If the heart rhythm is not treatable with defibrillation, the Welch Allyn AED20 displays and announces the message No Shock Advised. The Welch Allyn AED20 will direct the operator, every minute, to perform cardiopulmonary resuscitation (CPR) to effectively resuscitate the patient.
— No shock advised (Only Spoken once)
— It is safe to touch the patient — Check airway, check breathing, check
pulse (circulation)
— If no pulse start (begin) CPR
The Welch Allyn AED20 will continue to assess the patient’s heart rhythm. If the signal is non-shockable, No Shock Advised
will continue to flash on the display, but if the Welch Allyn AED20 detects a shockable rhythm it will direct the operator to stand back as it begins to analyze the patient’s hea rt rhythm.
— Analyzing heart rhythm. Do not touch the
patient
If the patient is pulseless, apneac, and unconscious, when directed, perform cardiopulmonary resuscitation in accordance with the procedures and techniques presented in your CPR training. The Welch Allyn AED20 also directs the operator to perform CPR after three consecutive, delivered shocks. During the CPR cycle, the Welch Allyn AED20 will not be assessing the patient's heart rhythm.
At the end of the CPR cycle (15, 30, 60, or 90 seconds), the Welch Allyn AED20 will prompt you to stop CPR and not touch the patient so it can assess the heart rhythm, confirm its analysis, and determine if a shockable condition exists.
— Stop CPR
A CPR cycle can be interrupted and analysis resumed at any time by pressing the ANALYZE button.

EMS Mode

EMS mode is a feature specifically designed for use by an Emergency Medical Technician. EMS mode is recommended when continuous AED mode analysis is required while
transporting a patient or performing another procedure such
Menu
E F -
Vol
4
as intubation. EMS Mode is a supervisor selectable mode of operation that performs continuous background analysis, but requires the user to press the Analyze button for full analysis in response to a prompt from the AED20. The follow ing section describes the operation and various features of EMS mode.
Background Monitoring
When the unit is powered on in EMS mode, it is automatically set to a Voice Off mode. This means that the AED will analyze silently and will not speak any voice prompts unless it detects a shockable rhythm. A screen similar to the one seen below will be displayed.
00:12:53
HR
180
Shocks: 0
MONITORING ECG
PRESS TO ANALYZE
+
Log
Analyze
No
Card
When this screen is active, no voice prompts will be spoken, but the AED will continuously analyze the patient’s heart rhythm.
If a shockable rhythm is detected, the screen will change and the AED will speak and display CHECK PATIENT.
Menu
-
Vol
4
00:12:53
HR
180
Shocks: 0
CHECK PATIENT
PRESS TO ANALYZE
When the “CHECK PATIENT” prompt is spoken, the user should verify that the patient is pulseless, apneac, and unconscious, and eliminate sources of motion artifact before pressing the Analyze button to Enter Voice On mode. In Voice On mode, the AED will issue verbal prompts, fully analyzing the patient’s heart rhythm and charging the defibrillator if necessary. Follow normal AED mode operating procedures in Voice On mode.
Log
E F
+
Analyze
No
Card
¥ The Analyze button can be pressed at any time in
EMS mode to perform a full analysis of the patient’s heart rhythm.
¥ The “Check Patient” prompt may be spoken in
response to excessive motion artifact or CPR. Eliminate sources of motion artifact before pressing the Analyze button.
If defibrillation is necessary, the AED will perform the normal three-shock SAED protocol set by the supervisor. If a patient is successfully defibrillated, the AED will return to Voice Off mode. If three successive shocks are delivered, the CPR timer will begin after the third shock. Following
completion of CPR, the unit will speak “Stop CPR” and return to Voice Off mode to continue background monitoring.

Electrode Monitoring (option)

An optional electrode monitoring cable (002128-IEC, 002130-AHA) is available for use with the Welch Allyn AED20. The operator uses low cost standard ECG electrodes to assess patients who do not meet the criteria for using the automated mode, for example, a patient who has a pulse, or is consc ious, but has chest pains.
Electrode monitoring is recommended for use in manual mode for extended monitoring or monitoring while in transport. When the electrode monitoring cable is attached, the Welch Allyn AED20 analyzes the patient’s rhythm while in automated mode, but will not charge the defibrillator or allow the operator to deliver a shock.
WARNING! Do not administer a shock using the electrode monitoring cable. The electrode monitoring cable has protective circuitry that prevents defibrillation energy from being delivered to the patient.
Always check the expiration date on defibrillation pads and do not use pads if the packaging has been previously opened. The Welch Allyn AED20 may interpret excessively dry defibrillation pads as an attached electrode monitoring cable.
Using the Electrode Monitoring Cable
To use electrode monitoring:
1. Attach electrode monitoring cable to Welch Allyn AED20.
2. Properly prepare the patient's skin prior to attaching the electrodes. Clean the skin sites with a coarse, dry terry cloth. Then, clean the skin with alcohol and allow to dry completely before applying the electrodes.
3. Connect each lead of the electrode monitoring cable to the appropriate disposable electrode. Arrange the electrodes as shown below. Attach an electrode to the sternum (RA) area of chest and the other to the apex area (LL) of the chest.
Caution Do not use the electrode monitoring cable for Automatic Rhythm Analysis due to the possibility of artifact. Proper skin preparation and the use of fresh, high-quality monitoring electrodes are imperative to minimize artifact when using the electrode monitoring cable.
Red(AHA)/Green(IEC) Electrode Placement
White(AHA)/Red(IEC)
Electrode Placement
Charge
Menu
RA
LL
Using the Electrode Monitoring in Manual Mode
The Welch Allyn AED20 displays MONITORING ONLY at the bottom of the prompts window during normal Manual Mode operation.
00: 00: 00
HR ---
Shocks: 0
MONITORING ONLY
+-
Log
E F
Energy ↓↓ Energy ↑↑
4 Vol
Menu
When the operator presses the Charge button, an audible tone sounds and CHANGE TO PADS flashes on the display.
00: 00: 00
If purchased, Manual mode is accessible by pressing the "Manual" button. Manual mode allows the operator to select energy, charge the defibrillator, and deliver a shock to the patient manually.
CHANGE TO PADS
-
+
Log
E F
Energy Energy Charge
HR ---
Menu
Shocks: 0
Disarm
Menu
360 300 200 150 100
70 50 30 20 10
7 5 2
If the operator attempts to deliver a shock using the electrode monitoring cable, SHOCK NOT DELIVERED displays on the screen and no energy is delivered to the patient.
Caution Do not replace the electrode monitoring cable with a substitute. Using any other cable may cause burns to the patient.
Attempting to Use Electrode Monitoring in Automated Mode
Monitoring
Analyze
It is recommended not to use the electrode monitoring cable for Automatic Rhythm Analysis. If the Welch Allyn AED20 is set to Automated Mode when the electrode monitoring cable is attached, MONITORING ONLY will flash in the Defib window.
00: 00: 00
+-
Log
E F
4 Vol
HR ---
Shocks: 0
Menu
Only
While the electrode monitoring cable is attached, the Welch Allyn AED20 will only analyze the heart rhythm when the Analyze button is pressed. Do not move or touch the patient while analyzing with the electrode monitoring cable. When the analyze button is pressed, the Welch Allyn AED20 will begin an analysis cycle.
Press the Analyze button, the Welch Allyn AED20 will speak Analyzing and display ANALYZING and STAND CLEAR and go through the analysis cycle.
— Analyzing
If the result is a non-shockable waveform, the AED will sound a double beep and display NO SHOCK ADVISED. If the result is a shockable waveform, the AED will speak Change to Pads, sound 5 beeps, and display CHANGE TO PADS, CH ECK PATIENT, IF NO PULSE START CPR.
— Change to Pads
The Welch Allyn AED20 will continue to wait for the Analyze button to be pushed while in Automated Mode. The AED will not allow the user to shock the patient with the monitoring cable attached.

Post-Use Procedures

After each use, the Welch Allyn AED20 should be inspected, cleaned, and a new supply of electrode pads restocked to prepare the unit for its next use. Any event documentation should be retrieved from the internal log or external memory card and printed.
Print or transfer the log information from the internal memory or the external memory PCMCIA card. After data retrieval, clear the internal memory. Any error messages or malfunctions should be reported and corrective actions taken before storin g the unit for reuse.
During storage, the Welch Allyn AED20 performs periodic self-tests including the functionality of the unit and the status of the battery and internal circuitry. A more detailed test of the unit's operation and battery status should be performed on a regular basis. See Chapter 4 Maintaining the Welch Allyn AED20 for more information.
Chapter 3

Programming the Welch Allyn AED20

Welch Allyn AED20 Users Manual
This chapter explains how to set the basic system operating options through the User Menu (Automated or Manual Mode). It also provides information on accessing and setting the advanced system operating options using the Supervisor Menu.
Menu Structure Diag ram 3-3
Menu Structure Overview 3-4
Accessing the User Menu from Automated Mode 3-4
Accessing the User Menu from Manual Mode 3-5
User Menu 3-7
User Menu Structure Overview................................................3-8
Working with the Log ..................................................................3-9
Setting the Date........................................................................3-14
Setting the Time........................................................................3-15
Adjusting the Contrast..............................................................3-16
Adjusting the Speaker Volume ...............................................3-17
Enabling EMS Mode.................................................................3-18
Supervisor Menu Tree 3-19
990020 – Rev. K Programming the Welch Al lyn AED20 3-1
Supervisor Menu 3-20
Accessing the Supervisor Mode............................................3-21
Supervisor Menu Items............................................................3-22
Selecting a Language..............................................................3-23
Setting the Charge Protocol....................................................3-24
Diagnostics................................................................................3-25
Calibration..................................................................................3-26
Viewing Information on the PCMCIA Memory Card...........3-30
Setting Options .........................................................................3-32
Changing Manual and Supervisor
Password Codes ......................................................................3-35
Upgrading the Welch Allyn AED20 System.........................3-36
3-2 Welch Allyn AED20 Users Manual 990020 – Rev. K

Menu Structure Diagram

Menu Structure Overview

The operating options are available to the operator through a simple menu structure. The basic system operating options are accessed through the User Menu in either Automated or Manual Mode. The advanced system operating options are accessed through the Supervisor Menu.
The Welch Allyn AED20 has the capability for certain menu buttons to auto repeat. Buttons with more than one choice will auto repeat, and the up and down arrows will scroll through the choices for a selection. To make a button auto-repeat, hold it down until the desired choice is selected.

Accessing the User Menu from Automated Mode

When the Welch Allyn AED20 is powered-up, the unit performs a self test and the start-up screen displays. Access the User Menu by pressing “Menu” in the lower right corner.
00: 00: 00
HR ---
Shocks: 0
Self Test Passed
+-
Log
E F
4 Vol
3-4 Welch Allyn AED20 Users Manual 990020 – Rev. K
Menu
¥ If the Manual Mode is purchased, MANUAL
appears in place of the contrast menu on start-up screen. .

Accessing the User Menu from Manual Mode

¥ Only available on units with Manual Mode
purchased.
When the Welch Allyn AED20 is powered-up with the Manual Mode option installed, the unit performs a self test and the manual mode start-up screen displays.
Self Test Passed
To access the Manual Mode Menu:
1. Press Manual to display the manual mode
passcode screen.
0
123
Enter00
2. Press the button below the corresponding number to select that digit of the manual mode passcode.
3. Repeat Step 2 for each digit of the passcode until the correct number displays.
¥ The default password is 123.
4. Press Enter to accept the passcode. If the number is correct, the Welch Allyn AED20 enters manual mode.
5. Press Menu to display the User Menu screen.
MenuEnergy Energy Charge
User Menu
¥ Press Back to return to the manual mode
operating screen.
3-6 Welch Allyn AED20 Users Manual 990020 – Rev. K

User Menu

User Menu
Use the two arrow buttons on the bottom menu to move from one menu selection to the next. The selected menu item is highlighted by a black box. Push the Select button to select the highlighted menu item.
selections
Log Allows viewing, hearing, pointing, or transferring
of the internal log.
Date Display the curren t date, and set and save a new
date (month, day, year) using the buttons below the Menu Bar.
Time Display the current time, set, and save a new
time (hour, minute) using the buttons below the Menu Bar.
Settings Adjust the LCD contrast and adjust the volume
of the system audio and save the settings.
Supervisor Enter the password code using the buttons
below the Menu Bar to display the Supervisor Menu selections.
Clear
Print
Month
Day
4
Back
Vol
Hour
Save
0
Enter 0 0
For each menu item selected, the corresponding option appears at the bottom of the display. If Supervisor is selected, the user must enter the correct supervisor passcode in order to enter the Supervisor Menu selection screen.

User Menu Structure Overview

Log Date Time
Settings
Supervisor
EMS Off
Setup
Year
Minute
Enter Supervisor Code
Back Save
Enter Supervisor Menus/Enable EMS Mode
The subsections that follow explain how to set the options available through the User Menu. The procedures included are:
v Working with the log v Setting the date v Setting the time v Adjusting the contrast v Adjusting the speaker volume v Enabling EMS Mode
3-8 Welch Allyn AED20 Users Manual 990020 – Rev. K

Working with the Log

connect cable end with bead to the data
The log contains a record of ECG tracings and time­stamped system status events. The log can be printed to a parallel printer, printed to a serial printer, or transferred to a PC for viewing. Use the appropriate setup procedure to connect the printer or PC to the Welch Allyn AED20, then follow the instr uctions for printing.
port
To setup a parallel printer:
¥ The Welch Allyn AED Parallel
Communication Kit (002119) is required for this connection.
1. Connect the male end of the DB25­Modular adapter (550790) to the DB25 female end of the Serial to Paralle l converter (900412 or 900416). Connect the Serial Cable (551778) into the AED20 serial data port and to the DB25-Modular adapter (550790)
2. Connect the Serial to Parallel converter to the parallel printer port on your printer. Connect the AC Power adapter to the Serial to Parallel converter and plug in the AC Power adapter to a wall outlet.
3. Make sure the Serial to Parallel converter dip switches are set to 57600 baud. See the instructions included with the communication kit for details.
To setup a serial printer:
¥ The Welch Allyn AED PC Data
Transfer/Serial Communication Kit (002120) is required for this connection.
1. Connect the Serial Communication Cable (551778) into the Welch Allyn AED20 serial data port and the other end to the Serial Printer Trans fer Adapter (520469).
2. Connect the Serial Printer Transfer Adapter to the serial printer.
To setup a PC for viewing:
¥ The Welch Allyn AED PC Data
Transfer/Serial Communication Kit (002120) is required for this connection.
3-10 Welch Allyn AED20 Users Manual 990020 – Rev. K
ECG or Text can be used to tra nsfer data to a PC or the RS232 option with Welch Allyn Smartlink software can be used for easy data archiving and playback.
1. Connect the Serial Communication Cable (551778) into the Welch Allyn AED20 serial data port and the other end into the PC Data Transfer Adapter (520468).
2. Connect the PC Data Transfer Adapter to the 9-pin serial port on your PC.
3. Use the Terminal or Serial Communications program on the PC to set the port settings to 57600 baud, N, 8, 1.
When the printer or PC is properly setup, turn on the output device and the Welch Allyn AED20. Use the following procedure to print the log.
To print the log or ECG data:
1. Access the User Menu. Select Log to display the Log menu bar.
Log
Clear
Print
Setup
Back
2. Press Setup to display the Output Mode
menu bar.
3. Select Text or ECG and the appropriate baud rate. Press Back to return to the Log menu bar.
¥ ECG Setting only works with a parallel
printer.
4. Press Print to print the log entries. A steady printer icon replaces the log icon to confirm printing.
¥ A flashing printer icon indicates an error.
Verify that the cable and adapter are connected correctly and check that the printer is online and has paper.
An example printout with typical information is shown below.
3-12 Welch Allyn AED20 Users Manual 990020 – Rev. K
5. Press Clear to remove all log entries.
6. Press Back to return to the Main Menu.

Setting the Date

Use the date screen to change the date. Use the menu selection buttons below the menu bar to change the date displayed.
To set a new date:
1. Access the User Menu. Select Date and display the Date menu bar.
2. Press the buttons below the month, date, and year to change the date displayed.
3. Press Save to enter the date displayed and return to the User Menu.
¥ Setting the date will force a new patient into the
entry log.
3-14 Welch Allyn AED20 Users Manual 990020 – Rev. K

Setting the Time

The Welch Allyn AED20 time-stamps are events saved to the log. A 24-clock is used for time displays (e.g., 14:24 is used for 2:24 p.m.). Use the time screen and the menu selection buttons below the menu bar to change the time displayed.
To set a new time:
1. Access the User Menu. Select Time to
display the Time menu bar.
Time
Hour Minute Save
2. Press the buttons below the hour and minute to change the time displayed.
3. Press Save to enter the time displayed and return to the User Menu.
¥ Setting the time will force a new patient
into the entry log.

Adjusting the Contrast

The contrast of the Welch Allyn AED20 liquid crystal display can be adjusted. There are nine pre-set contrast levels available. Use the contrast screen and the menu selection button below the menu bar to change the contrast of the LCD.
To adjust the LCD contrast:
1. Access the User Menu. Select Settings to
display the Settings screen and menu bar.
2. Press the contrast button ( ) to change the contrast of the LCD. The number next to the contrast icon changes corresponding to increases in the contrast (1-9).
3. Press Back to return to the User Menu.
3-16 Welch Allyn AED20 Users Manual 990020 – Rev. K

Adjusting the Speaker Volume

The volume of the voice prompts through the Welch Allyn AED20 speaker can be adjusted. There are four pre-set volume levels available. Use the volume screen and the menu selection button below the menu bar to change the volume of the voice prompts.
To adjust the volume:
1. Access the User Menu. Select Settings to
display the Settings screen and menu bar.
Settings
4
Vol
Back
2. Press Volume ( ) to change the
volume of the voice prompts through the Welch Allyn AED20 speaker. The indicator in the volume icon changes to one of four positions.
3. Press Back to return to the User Menu.

Enabling EMS Mode

0
Enter 0 0
EMS mode is a feature specifically designed for use by an Emergency Medical Technician. EMS mode is recommended when continuous AED mode analysis is required while transporting a patient or performing another procedure such as intubation. EMS Mode is a supervisor selectable mo de of operation that performs continuous background analysis, but requires the user to press the Analyze button for full analysis in response to a prompt from the AED20.
Log
Date
Time
Settings
Supervisor
EMS Off
Enter Supervisor Code
1 2 3
Reboot in EMS Mode
To Enable EMS Mode:
1. Access the User Menu. Select EMS Off to display the Passcode Entry screen.
2. Enter the Supervisor passcode.
3. If the passcode is correct, the unit will reboot with EMS Mode ON.
¥ Follow the same procedure to turn EMS
Mode OFF.
3-18 Welch Allyn AED20 Users Manual 990020 – Rev. K

Supervisor Menu Tree

Enter
Supervisor
Passcode
Language
Protocol
Diag Card
Setup
Upgrade
Code
AED PRGM
00.05.07 SRAM
512 KB
01/01/00
00: 00: 00
Log
Date
Time
Settings
Supervisor
+-
Log
E F
English
200
SWRev BackCal Defaults
Prg AED Erase Info Options
Upgrade Menu
Manual BackSupr
xx.xx.xx BackDEF: B PS: A
Prg AED BackErase Info
Software BackLoad Save
Options
HR ---
Menu
Software Rev
Card
Prg AED
123456789
Setup
Unit ID CPR TMR
Select
Select
Shocks: 0
Back
Save Back300 360
Back BackUnit ID CPR TMR
Back
Back
16 Character entry
ECG OFF BackAudio ON 60 Hz
Options
CPR Timer
Select
60 Sec Back
Back

Supervisor Menu

The subsections that follow explain how to access the Supervisor Mode Menu and set the options available through that menu. The procedures included are:
v Accessing the supervisor menu v Selecting a language v Setting the charge protocol v Viewing software revisions v Enabling/disabling the memory card v Enabling/disabling ECG and audio options v Changing manual/supervisor password codes v Upgrading the Welch Allyn AED20 system
3-20 Welch Allyn AED20 Users Manual 990020 – Rev. K

Accessing the Supervisor Menu

The Supervisor Menu is accessed from the User Menu screen.
To access the Supervisor Menu:
1. Go to the User Menu as described earlier in this chapter.
2. Use the up and down arrows to choose Supervisor, and press select.
3. Enter the passcode and press enter. If passcode is correct, the Supervisor menu will appear.
0
123
Enter00

Supervisor Menu Items

Language
Protocol
Diag
Card
Setup
Upgrade
Code
Language Select text and audio language using the
buttons below the Menu Bar. (Restart the Welch Allyn AED20 to activate the language selected.)
Protocol Select the energy level protocol using the
buttons below the Menu Bar. Standard (default) protocol is 200J, 300J, and 360J (150J, 200J, 300J in the UK).
Diag View software revisions/ reset factory defaults. Card Access PCMCIA card functions. Setup Enable or disable the ECG trace and audio
recording 50/60 Hz. Set unit ID and set time for the CPR timer.
Upgrade Add upgrade options to the system. Code Set both the Manual Mode and the Supervisor
Mode pass code numbers using the buttons below the Menu Bar.
3-22 Welch Allyn AED20 Users Manual 990020 – Rev. K

Selecting a Language

The language used for text on icons, screen displays, and prompts and used for voice prompts can be changed if the Welch Allyn AED20 has the language option upgrade installed.
To select a different language:
1. Access the Supervisor Menu. Select Language and display the Language screen and menu bar.
English Back
Language
2. Press the buttons below the arrows to change the language.
3. Press Save to select the language displayed and return to the Supervisor Menu.
4. Restart the Welch Allyn AED20 to activate the language selected and change the screen text and voice prompts.

Setting the Charge Protocol

The standard Welch Allyn AED20 charge protocol provides a sequence of three defibrillator shocks. The default protocol setting is 200 Joules, 300 Joules, and 360 Joules (150 Joules, 200 Joules, and 300 Joules for the UK). Use the menu selection button below the menu bar to change the shock charge displayed.
To set a new shock charge:
1. Access the Supervisor Menu. Select
Protocol and display the protocol menu bar.
200
Protocol
2. Press button below the digit to toggle the values.
3. Press Save to enter the charge displayed and return to the Supervisor Menu.
Energy Selections Available
First Shock
Second Shock
Third
Shock 150 J 150 J 150 J 200 J 200 J 200 J 300 J 300 J 360 J
Save300 360
3-24 Welch Allyn AED20 Users Manual 990020 – Rev. K

Diagnostics

Use the diagnostics screen to view the installed versions of the software and restore factory defaults.
To view software revisions:
1. Access the Supervisor Menu. Select Diag
to display the Diagnostics screen and menu bar.
Diag
SWRev
BackCal Defaults
2. Press SWRev to display the revisions of
the current software for the motherboard xx.xx.xx, defibrillator DEF: and the power supply PS.
xx.xx.xx BackDEF: B PS: A
Software Rev
¥ Pressing the leftmost button while the
motherboard software revision is displayed will display the FPGA device revision.
3. Press Back to return to the Diag menu. Press Back again to return to the Supervisor Menu.

Calibration

SWRev Cal Defaults Back
Diag
Batt Pre Lo Pre Hi Back
¥ Battery and threshold calibration should
be performed by authorized service personal only.
To restore factory defaults
1. Access the Supervisor Menu. Select Diag.
to display the Diagnostics Menu.
SWRev Cal Defaults Back
2. Press Defaults to return the values to the
factory settings.
3. Press Back to return to the Supervisor
Menu.
Calibration
Diag
3-26 Welch Allyn AED20 Users Manual 990020 – Rev. K
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