Hillrom Welch Allyn H12+ User manual

Welch Allyn®H12+™
12-lead Holter
Service Manual
CAUTION: Federal law restricts this device to sale by or on the order of a physician.

© Copyright 2020, Welch Allyn. All rights are reserved. To support the intended use of the product
described in this publication, the purchaser of the product is permitted to copy this publication, for internal
distribution only, from the media provided by Welch Allyn. No other use, reproduction, or distribution of
this publication, or any part of it, is permitted without written permission from Welch Allyn. Welch Allyn
assumes no responsibility for any injury to anyone, or for any illegal or improper use of the product, that
may result from failure to use this product in accordance with the instructions, cautions, warnings, or
statement of intended use published in this manual. Unauthorized copying of this publication may not only
infringe copyright but also reduce the ability of Welch Allyn to provide accurate and up-to-date information
to users and operators alike. Software: 2019 v5.0.0
Welch Allyn®, H12+™ and HScribe® are registered trademarks of Welch Allyn.
The information contained in this manual is subject to change without notice.
All changes will be in compliance with regulations governing manufacture of medical equipment.
For patent information, please visit www.welchallyn.com/patents
For information about any Welch Allyn product, visit: https://www.welchallyn.com/en/about-
us/locations.html
Customer Service and Technical Support: https://www.welchallyn.com/en/other/contact-us.html
1.888.667.8272, [e-mail]
80026044 Ver. A
Revision date: 2020-04
901141 HOLTER RECORDER
Welch Allyn, Inc.
4341 State Street Road
Skaneateles Falls, NY 13153 USA
welchallyn.com

1
TABLE OF CONTENTS
SERVICE AND SPARE PARTS ................................................................................................................................... 3
ASSISTANCE AND PARTS...................................................................................................................................................3
REPAIRS........................................................................................................................................................................3
NOTICES................................................................................................................................................................. 5
MANUFACTURER’S RESPONSIBILITY ....................................................................................................................................5
RESPONSIBILITY OF THE CUSTOMER ....................................................................................................................................5
EQUIPMENT IDENTIFICATION.............................................................................................................................................5
COPYRIGHT AND TRADEMARK NOTICES...............................................................................................................................5
OTHER IMPORTANT INFORMATION.....................................................................................................................................5
NOTICE TO EU USERS AND/OR PATIENTS ............................................................................................................................5
USER SAFETY INFORMATION ................................................................................................................................. 7
WARNING(S).............................................................................................................................................................7
CAUTION(S)..................................................................................................................................................................9
NOTE(S) .....................................................................................................................................................................10
EQUIPMENT SYMBOLS......................................................................................................................................... 11
SYMBOL DELINEATION ...................................................................................................................................................11
GENERAL.............................................................................................................................................................. 13
SERVICE MANUAL PURPOSE............................................................................................................................................13
PERIODIC SAFETY INSPECTIONS........................................................................................................................................13
DO NOT MOUNT PRODUCT ABOVE PATIENT ......................................................................................................................13
PROPER PATIENT CABLE.................................................................................................................................................13
RECOMMENDED ACCESSORIES.........................................................................................................................................13
STERILIZING THIS PRODUCT.............................................................................................................................................13
LIQUID SPILLS ..............................................................................................................................................................13
PRODUCT INFORMATION................................................................................................................................................13
MAINTENANCE .................................................................................................................................................... 16
INTRODUCTION ............................................................................................................................................................16
CLEANING AND INSPECTING TECHNIQUES ..........................................................................................................................16
CLEANING AND DISINFECTING THE H12+ ..........................................................................................................................16
DISINFECTING AGENTS FOR THE H12+..............................................................................................................................16
CLEANING AND DISINFECTING ACCESSORIES........................................................................................................................17
PERIODIC MAINTENANCE ...............................................................................................................................................18
PRODUCT LIFE..............................................................................................................................................................18
DISPOSAL OF WASTE MATERIALS.....................................................................................................................................18
BATTERY TERMINAL INSPECTION......................................................................................................................................19
TECHNICAL DESCRIPTION..................................................................................................................................... 20
H12+ OVERVIEW .........................................................................................................................................................20
H12+ DIGITAL RECORDER..............................................................................................................................................21
STARTING A RECORDING SESSION ....................................................................................................................................31
ENTERING (OPTIONAL)DIARY EVENTS ..............................................................................................................................32
ENDING A RECORDING SESSION.......................................................................................................................................32
H12+ DISASSEMBLY ............................................................................................................................................. 34

TABLE OF CONTENTS
2
OPENING THE UNIT.......................................................................................................................................................35
KEYPAD REMOVAL ........................................................................................................................................................36
LCD REMOVAL &REPLACEMENT.....................................................................................................................................38
DIGITAL BOARD REMOVAL &REPLACEMENT......................................................................................................................40
FRONT END BOARD REMOVAL &REPLACEMENT.................................................................................................................40
ENTERING A SERIAL NUMBER ONTO A NEW PROGRAMMED DIGITAL PCBA ........................................................................42
PRINTED CIRCUIT BOARDS ................................................................................................................................... 44
INTRODUCTION ............................................................................................................................................................44
H12+ FRONT END PC BOARD ASSEMBLY:.........................................................................................................................45
BLOCK DIAGRAM OF H12+ FRONT END BOARD .................................................................................................................46
H12+ DIGITAL PC BOARD ASSEMBLY:..............................................................................................................................47
BLOCK DIAGRAM OF H12+ DIGITAL BOARD.......................................................................................................................48
TESTING AND TROUBLESHOOTING ...................................................................................................................... 49
INTRODUCTION ............................................................................................................................................................49
CONFORMANCE TESTING................................................................................................................................................49
TEST DESCRIPTION ........................................................................................................................................................49
DEFINITION OF TERMS ...................................................................................................................................................49
REQUIRED EQUIPMENT..................................................................................................................................................50
INITIAL SET-UP .............................................................................................................................................................50
SPECIAL INSTRUCTIONS ..................................................................................................................................................50
TEST PROCEDURES........................................................................................................................................................50
TROUBLESHOOTING.......................................................................................................................................................54
TABLE OF MESSAGES.....................................................................................................................................................54
LOG FILE INFORMATION ...................................................................................................................................... 55
INTRODUCTION ............................................................................................................................................................55
POWER-UP..................................................................................................................................................................56
DEVICE PREPARATION:...................................................................................................................................................56
RECORDING.................................................................................................................................................................57

3
SERVICE AND SPARE PARTS
Assistance and Parts
If the product fails to function properly or if assistance, service or spare parts are required, contact the
nearest Welch Allyn Technical Support Center.
https://www.welchallyn.com/en/other/contact-us.html
When calling, please be prepared to provide:
Product name and model number and complete description of the problem
The serial number of your product (if applicable)
The complete name, address and phone number of your facility
For out-of-warranty repairs or spare parts orders, a purchase order (or credit card) number
For parts order, the required spare or replacement part number(s)
Repairs
All repairs on products under warranty must be performed or approved by Welch Allyn. Unauthorized
repairs will void the warranty. In addition, whether or not covered under warranty, any product repair shall
exclusively be performed by Welch Allyn certified service personnel.
If your product requires warranty, extended warranty, or non-warranty repair service, please call first the
nearest Welch Allyn Technical Support Center. A representative will assist you in troubleshooting the
problem and will make every effort to solve it over the phone, avoiding potential unnecessary returns.
In case the return cannot be avoided, the representative will record all necessary information and will
provide a Return Material Authorization (RMA) number, as well as the appropriate return address. A
Return Material Authorization (RMA) number must be obtained prior to any return.
Packing Instructions:
Remove patient cable, battery, and Secure Digital memory card (as appropriate) prior to packing,
unless you suspect they are associated with the problem.
Whenever possible, use the original shipping carton and packing materials.
Include a packing list and the Welch Allyn Return Material Authorization (RMA) number.
It is recommended that all returned goods be insured. Claims for loss or damage to the product must be
initiated by the sender.

SERVICE AND SPARE PARTS
4

5
NOTICES
Manufacturer’s Responsibility
Welch Allyn is responsible for the effects on safety and performance only if:
•Assembly operations, extensions, readjustments, modifications, or repairs are carried out only by
persons authorized by Welch Allyn.
•The device is used in accordance with the instructions for use.
Responsibility of the Customer
The user of this device is responsible for ensuring the implementation of a satisfactory maintenance
schedule. Failure to do so may cause undue failure and possible health hazards.
Equipment Identification
Welch Allyn equipment is identified by a serial and reference number on the back of the device. Care
should be taken so that these numbers are not defaced.
Copyright and Trademark Notices
This document contains information that is protected by copyright. All rights are reserved. No part of this
document may be photocopied, reproduced, or translated to another language without prior written
consent of Welch Allyn.
Other Important Information
The information in this document is subject to change without notice.
Welch Allyn makes no warranty of any kind with regard to this material including, but not limited to,
implied warranties of merchantability and fitness for a particular purpose. Welch Allyn assumes no
responsibility for any errors or omissions that may appear in this document. Welch Allyn makes no
commitment to update or to keep current the information contained in this document.
Notice to EU Users and/or Patients
Any serious incident that has occurred in relation to the device, should be reported to the manufacturer
and the competent authority of the Member State in which the user and/or patient is established.

NOTICES
6

7
USER SAFETY INFORMATION
WARNING:
Means there is the possibility of personal injury to you or others.
Caution:
Means there is the possibility of damage to the device.
Note:
Provides information to further assist in the use of the device.
WARNING(S)
This manual gives important information about the use and safety of this device. Deviating from
operating procedures, misuse or misapplication of the device, or ignoring specifications and
recommendations could result in increased risk of harm to users, patients and bystanders, or damage
to the device.
Any serious incident that has occurred in relation to the H12+ should be reported to Welch Allyn and
the competent authority of the Member State in which the user or patient is established.
Caretakers must closely supervise an infant or child who is wearing a Holter recorder to ensure the
recorder is intact and the patient cable is properly secured.
Device stores data reflecting a patient’s physiological condition to a properly equipped analysis
system that when reviewed by a trained physician or clinician can be useful in determining a
diagnosis; however, the data should not be used as a sole means for determining a patient’s
diagnosis.
Users are expected to be licensed clinical professionals knowledgeable about medical procedures
and patient care, and adequately trained in the use of this device. Before attempting to use this
device for clinical applications, the operator must read and understand the contents of the user
manual and other accompanying documents. Inadequate knowledge or training could result in
increased risk of harm to users, patients and bystanders, or damage to the device. Contact Welch
Allyn service for additional training options.
To maintain designed operator and patient safety, peripheral equipment and accessories that can
come in direct patient contact must be in compliance with UL 60601-1, IEC 60601-1, and IEC 60601-
2-47. Only use parts and accessories supplied with the device and available through Welch Allyn.
Patient cables intended for use with the device include series resistance (9 Kohm minimum) in each
lead for defibrillation protection. Patient cables should be checked for cracks or breakage prior to
use.
Conductive parts of the patient cable, electrodes, and associated connections of type CF applied
parts, including the neutral conductor of the patient cable and electrodes, should not come into
contact with other conductive parts including earth ground.
ECG electrodes could cause skin irritation; patients should be examined for signs of irritation or
inflammation.
To avoid the possibility of serious injury or death during patient defibrillation, do not come in contact
with device or patient cables. Additionally, proper placement of defibrillator paddles in relation to the
electrodes is required to minimize harm to the patient.
Defibrillation protection is guaranteed only if the original patient cable is used. Any modification of
this device may alter defibrillator protection.

USER SAFETY INFORMATION
8
This device was designed to use the electrodes specified in this manual. Proper clinical procedure
must be employed to prep the electrode sites and to monitor the patient for excessive skin irritation,
inflammation, or other adverse reactions.
Carefully route cables to reduce any possibility of patient entanglement or strangulation.
Simultaneous connection to other equipment may increase leakage current.
To avoid potential for spread of disease or infection, single-use disposable components (e.g.,
electrodes) must not be reused. To maintain safety and effectiveness, electrodes must not be used
beyond their expiration date.
FCC Warning (Part 15.21): Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the device.

A possible explosion hazard exists. Do not use the device in the presence of a flammable anesthetic
mixture.
The device has not been designed for use with high-frequency (HF) surgical equipment and does not
provide a protective means against hazards to the patient.
The quality of the signal produced by the device may be adversely affected by the use of other
medical equipment, including but not limited to defibrillators and ultrasound machines.
There is no known safety hazard if other equipment, such as pacemakers or other stimulators, is
used simultaneously with the device; however, disturbance to the signal may occur.
Operations may be affected in the presence of strong electromagnetic sources such as
electrosurgery equipment.
The device is restricted to use on one patient at a time.
The performance of the device may be compromised by excessive motion.
Use only recommended battery cells. Use of other cells may present a risk of fire or explosion.

USER SAFETY INFORMATION
9
Caution(s)
The H12+ recorder is not waterproof. It may be placed in an optionally available sealed, clear pouch
that will protect it from moisture, but should not be submerged in water.
To prevent possible damage to the device, do not use sharp or hard objects to depress buttons, only
use fingertips.
To prevent pinching, press down on the battery door latch when removing and replacing the battery
door.
Do not attempt to clean the device or patient cables by submersing into a liquid, autoclaving, or steam
cleaning as this may damage equipment or reduce its usable life. Use of unspecified
cleaning/disinfecting agents, failure to follow recommended procedures, or contact with unspecified
materials could result in increased risk of harm to users, patients and bystanders, or damage to the
device. Do not sterilize the device or patient cables with Ethylene Oxide (EtO) gas.
The device and patient cable should be cleaned between each use. Inspect cable and connection for
damage or excessive wear prior to each use. Replace cable if damage or excessive wear is noted.
Do not pull or stretch patient cables as this could result in mechanical and/or electrical failures.
Patient cables should be stored after forming them into a loose loop.
The device will only work with devices that are equipped with the appropriate option.
Do not format the SD Card using standard Microsoft Windows formatting conventions on the
computer. This will cause the SD card to be non-functional for Holter recording.
When removing the SD card from the system card reader, it is recommended to use the “Safely
Remove Hardware and Eject Media” feature on the computer to reduce the possibility of SD card
errors.
No user-serviceable parts are inside. Damaged or suspected inoperative equipment must be
immediately removed from use and must be checked/repaired by qualified service personnel prior to
continued use.
This device is not recommended for use in the presence of imaging equipment such as Magnetic
Resonance Imaging (MRI) and Computed Tomography (CT) devices, etc.
When necessary, dispose of the device, its components and accessories (e.g., batteries, cables,
electrodes), and/or packing materials in accordance with local regulations.
AA batteries are known to leak their contents when stored in unused equipment. Remove battery
from device when not used for an extended period of time.
To prevent possible damage to the device, the following environmental conditions must be adhered
to:
Operating Temperature: +10to +45C
Storage Temperature: -40to +70C
Relative Humidity: 10 to 95%, non-condensing
Ambient Air Pressure: 700 to 1060 millibars

USER SAFETY INFORMATION
10
Note(s)
Proper patient preparation is important to proper application of ECG electrodes and operation of the
device.
If electrode is not properly connected to the patient, or one or more of the patient cable lead wires is
damaged, display will indicate a lead fault for the lead(s) where the condition is present.
The device is set to the U.S. Central Time Zone when shipped from the factory. If a change is
required, set the correct date and time prior to using the recorder. Refer to the instructions within this
user manual.
The patient cable life expectancy is six months continuous use with proper care.
Complete lead fail will cause a greater draw on battery power which may cause the recording period
to end early due to low-battery voltage.
If during power up the battery voltage is below 1.45V, the recorder will display a low battery message
and will not continue.
The device will automatically turn off (blank screen) if the batteries have been severely discharged.
No preliminary or ongoing scheduled periodic calibration by the user or Welch Allyn personnel is
required. The design for the device is such that the system contains no elements requiring
calibration.
The device conforms to the following standards:
IEC 60601-1: Edition 3.1 2012-08 General requirements for basic Safety and essential
performance
IEC 60601-2-47: Edition 2.0 2012-02* Particular requirements for safety, including essential
performance, of ambulatory electrocardiographic
systems
IEC 60601-1-2: Third Edition 2007-03 Electromagnetic Compatibility
IEC 62304:2006/A1:2015 Software life-cycle processes
IEC 62366:2015 Application of usability engineering
93/42/EEC Medical Device Directive (MDD)
2012/19/EU Waste Electrical and Electronic Equipment
ISO 10993-1:2009/Cor. 1:2010 Biological evaluation of medical devices
* Pacemaker spikes <0.1 milliseconds may not always be detected.
The device is UL classified:
MEDICAL —PATIENT-MONITORING EQUIPMENT AS TO ELECTRICAL
SHOCK, FIRE AND MECHANICAL HAZARDS ONLY IN ACCORDANCE WITH
ANSI/AAMI ES60601-1 (2005) + AMD 1 (2012), IEC 60601-1 (2012), CAN/CSA
C22.2 No. 60601-1 (2014) AND IEC 60601-2-47 (2012).

11
EQUIPMENT SYMBOLS
Symbol Delineation
For information on the origin of these symbols, see the Welch Allyn symbols glossary:
http://www.welchallyn.com/symbolsglossary.
Electrostatic sensitive devices
WARNING The warning statements in this manual identify conditions or practices
that could lead to illness, injury, or death. In addition, when used on a patient applied
part, this symbol indicates defibrillation protection is in the cables. Warning symbols
will appear with a grey background in a black and white document.
CAUTION The caution statements in this manual identify conditions or practices that
could result in damage to the equipment or other property, or loss of data.
Follow instructions/directions for use (DFU) -- mandatory action. A copy of the DFU
is available on this website. A printed copy of the DFU can be ordered from Welch
Allyn for delivery within 7 calendar days.
Defibrillator-proof type CF applied part
Warning: Do not use this equipment in the MRI scan room.
Do not dispose as unsorted municipal waste. Requires separate handling for waste
disposal according to local requirements.
Device Manufacturer
Model Identifier
Reorder Number
Battery orientation and size
Medical Device

EQUIPMENT SYMBOLS
12

13
GENERAL
Service Manual Purpose
The purpose of this manual is to provide information to service personnel in order to maintain and repair
the H12+ Holter Recorder.
This manual includes parts lists and is intended to function primarily as a guide to preventative and
corrective maintenance and electrical repairs considered field repairable.
WARNING: No user serviceable parts are inside. Any modification of this device will void
any and all Manufacturer's Warranties and/or responsibilities. If you are not able to
correct the H12+ Holter Recorder’s questionable operating state using the
Troubleshooting guide in the Operator's Manual, do not attempt to service it
yourself. Contact Welch Allyn Service at:
https://www.welchallyn.com/en/other/contact-us.html
Periodic Safety Inspections
Follow the recommended maintenance schedule. Inspect the patient cable(s) periodically for fraying or
other damage and replace as needed. Broken or frayed wires may cause interference or loss of signal.
Pay particular attention to points where wires enter connectors.
Do Not Mount Product above Patient
Do not mount or place the product where it could fall on a patient or where it could be accidentally
knocked off a shelf or other mounting arrangement.
Proper Patient Cable
Use only the patient cable specified for this unit.
Recommended Accessories
For the patient's safety and optimum equipment performance, use only the accessories specified by/or
that meet Welch Allyn specifications.
Sterilizing this Product
Do not sterilize this product or any accessories unless specifically directed by the manufacturer.
Sterilization and sterilization environments can seriously damage many components and accessories.
Liquid Spills
Do not set beverages or other liquids on or near the H12+, and/or optional equipment.
Product Information
See Technical Description.

GENERAL
14

GENERAL
15

16
MAINTENANCE
Introduction
This section provides servicing and maintenance instructions for the H12+ Holter Recorder. Subsequent
parts of this section are disassembly, inspection techniques, and cleaning techniques.
Cleaning and Inspecting Techniques
This section describes the procedures for cleaning and disinfecting the H12+ and accessories.
WARNING: Follow these instructions to clean and disinfect the H12+ and its accessories.
Improper cleaning may cause damage that is not immediately apparent, leading to possible
safety hazards, device malfunction, and/or spread of infectious agents between persons.
Improper cleaning products and processes can damage the device, produce brittle lead wires
and cables, corrode the metal, and void the warranty. Use care and proper procedure whenever
cleaning or maintaining the device.
Cleaning and Disinfecting the H12+
WARNING: Do not immerse the H12+ in water or any other fluids. The H12+ is not
designed to be immersed in liquid and doing so may result in liquid entering the device leading
to possible safety hazards and/or device malfunction.
CAUTION: Do not steam autoclave, gas sterilize, or irradiate the H12+ as these may
result in damage to the device.
WARNING: Ensure the battery door is securely in place when cleaning the H12+ to avoid
risk of liquid entering into the device which may lead to a possible hazard and/or device
malfunction.
Disinfecting Agents for the H12+
The H12+ is compatible with the following disinfectants:
 Clorox Healthcare® Bleach Germicidal Wipes (use according to instructions on product label), or
 a soft, lint-free cloth dampened with a solution of sodium hypochlorite (10% household
bleach andwater solution) minimum 1:500 dilution (minimum 100 ppm free chlorine) and
maximum 1:10 dilution as recommended by the APIC Guidelines for Selection and Use of
Disinfectants.
CAUTION: Disinfecting or cleaning agents that contain Quaternary Ammonium Compounds
(Ammonium Chlorides) have been identified as having negative effects if used to disinfect the
product. Use of such agents may result in discoloration, cracking, and deterioration of the
external housing of the device.

MAINTENANCE
17
To clean the H12+:
1. Remove carry case and disconnect ECG cable from the device.
2. Disconnect power source by removing AA. Reinstall the battery door.
3. Thoroughly wipe the surface of the H12+ with a clean, lint-free cloth dampened with a
mild detergent and water for general cleaning or use one of the above recommended
agents fordisinfection.
WARNING: Do not oversaturate the cleaning cloth. Liquid pooling on the device may
enter into the device possibly leading to a safety hazard and/or device malfunction.
4. Dry the device with a clean, soft, dry, lint-freecloth.
Cleaning and disinfecting accessories
ECG Cables
Approved Cleaning Agents
Enzymatic detergent such as ENZOL (US) or CIDEZYME (outside the US).
Distilled water.
Disinfectant solution (such as CIDEX OPA, or a 10% solution ofhousehold
bleach (5.25% sodium hypochlorite) in distilled water).
Soft, lint-free cloths and/or soft-bristledbrushes.
Protective gloves and eyewear.
Procedure
1. Remove the ECG cable from the recorder.
2. Put on gloves and protectiveeyewear.
3. Prepare the detergent according to the manufacturer's instructions, andalso the
disinfectant solution, in separatecontainers.
4. Apply detergent to product using a soft, lint-free cloth. If material is dried on, allow
to sit for 1 minute. Do not immerse cable ends or lead wires in liquid as it can
cause corrosion.
5. Wipe smooth surfaces with the cloth.
6. Use a soft-bristle brush on visibly soiled areas and irregularsurfaces.
7. Remove detergent from product using cloth dampened in distilledwater.
8. Repeat as necessary.
9. Apply disinfectant solution on affected area using a soft cloth. Allow product to sit for
5 minutes.
10. Wipe excess solution and clean product again with cloth dampened indistilled
water.
11. Allow 2 hours for drying.
Carry case Wash the carry case by hand with fabric detergent and then air dry.
Do not machine dry the case.
The H12+ is compatible with a number of other accessories, each with unique cleaning and
disinfecting needs. Follow the cleaning and disinfecting instructions provided in the directions
for use shipped with those items.
WARNING: Always clean and/or disinfect accessories between patients to reduce the risk
of spreading infectious agents between persons.
WARNING: Do not reuse accessories indicated as single-patient use; as this may facilitate the
spread of infectious agents between persons.

MAINTENANCE
18
WARNING: Prevent liquid from penetrating the device and do not attempt to clean/disinfect the
device or patient cables by submerging into a liquid, autoclaving, or steam cleaning. Never
expose cables to strong ultra-violet radiation. Do not sterilize the device or ECG cable with
Ethylene Oxide (EtO) gas.
CAUTION: Use caution with excess liquid as contact with metal parts may cause corrosion.
CAUTION: Do not immerse cable ends or lead wires; immersion can cause metal corrosion.
CAUTION: Do not use excessive drying techniques such as forced heat.
Periodic Maintenance
Check the H12+ and the ECG cable before each use to ensure they are not damaged or broken.
1. Patient Cable Maintenance:
•Check patient cables for cracks or breakage prior to use
•Clean the cable with a germicidal solution that does not contain alcohol
•Alcohol will cause hardening and can introduce cracks
•Don’t use tape on the patient cable; tape residue will cause hardening and can introduce
cracks
•Patient cables should be stored by looping them loosely. Don’t pull or stretch the cables;
don’t
wrap cables tightly
•Replace patient cables periodically (depending on use and care)
2. Exterior Visual Inspection:
•Check connectors for loose, bent, or corroded contact points
•Inspect covers for warping, surface damage, or missing hardware
•Check for any other form of damage
3. Calibration:
•H12+ is functionally tested during the manufacturing process and is not designed to require
field calibration or annual recertification.
Product Life
The H12+ has a defined product life of 5 years excluding accessories, cables and batteries. As
required, product service, accessories and spare parts are available through Welch Allyn or its authorized
partners. Using the Holter recorder or its accessories and components beyond their defined life may lead
to damage to the equipment or a safety hazard to the user.
Disposal of Waste Materials
The H12+ uses one AA battery and disposable monitoring electrodes. Disposal must be in accordance
with the following procedures:
Battery: applicable disposal or recycling standards
Electrodes: normal waste