American Diagnostic Corporation (ADC) 657 Electronic Stethoscope User Manual

657 Electronic Stethoscope

User’s Manual

A Special Than
You...

Thank you for choosing the ADC®657 Electronic Stethoscope.
We're proud of the care and quality that goes into the manufacture of each and every item
that bears our name.

Only the finest materials are used to assure you of a timeless instrument designed for optimum
performance.

You'll quickly appreciate the results, for you now own one of the finest electronic stethoscopes
that money can buy.

With proper care and maintenance, your ADC
you with many years of dependable service. Please read the following instructions and general
information which will prove helpful in allowing you to enjoy your ADC

Thank you for your patronage.
It is indeed our pleasure to serve you.

Sincerely,
American Diagnostic Corp.

®

657 Electronic Stethoscope is sure to provide

®

product.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

• Intended Use

• Warning

• Caution

2. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

3. Name and Function of each part . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6

• Binaural positioning

• Adjusting spring tension

• Power ON/OFF

• Volume control

• Mode selection

• Replacing the battery

• Replacing the eartips

• Cleaning

5. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

• Operating environment

• Storage environment

• Regulatory standards

6. Parts, Service, and Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1. Introduction

Intended Use

• The ADC

tient through auscultation. It amplifies sounds and removes noise by using a contact microphone and
electronic circuits.

• Do not tap or scratch the chestpiece diaphragm while wearing the ear set while the power

is on. It may cause damage to your hearing.

• Do not bend harshly or apply excessive force to the stethoscope, this may cause it to break.

• Do not disassemble, repair, or modify the device. When repair is needed, refer to page 8 of

this booklet for warranty and service center details.

• Avoid high humidity and wet environment usage, such as bathrooms. Pressing the power

button while the stethoscope is wet could damage the device.

• Never immerse instrument in any liquid.

• Check the polarity (+, -) of the battery.

• Check the low battery level before use (‘D’ LED: flashing in Red). The sounds might be distorted

if the battery level is low.

• This product is intended to be used only by a medical specialist.

cause cancer, birth defects, or other reproductive harm.

®

657BK is an electronic stethoscope which transmits lung/heart sounds from a pa-

Warning

Warning - This product may contain a chemical known to the state of California to

Caution

• Avoid direct exposure to sunlight, heating vents, or heating appliances.

• When the stethoscope is left unused for a long period of time, the battery should be re­moved from the device. Otherwise, the battery might be completely discharged, and liquid from the
battery could damage the device.

• Avoid strong magnetic fields beside the stethoscope. It could cause malfunction.

• Do not use the stethoscope for any purpose other than medical examination.

• Do not pull the tubing connecting the main unit and the battery compartment.

Caution

• Federal law restricts this device to sale by or on the order of a physician or licensed
healthcare practitioner.

Caution

• Always check security of eartip before inserting in ears.

2. Features

Main features of the ADC

®

657 electronic stethoscope

• Improves low frequency sound transmission characteristics with the use of a piezopolymer

film contact microphone.

• MPU controlled automatic power-off.

• Mode selection (Bell, Diaphragm, Wide).

• 8-level digital volume control.

• Memorizes the mode and volume of the previous operation.

• Ergonomic design for comfort.

An acoustic microphone used in most electronic stethoscopes may have frequency charac-

teristics not suitable for body sounds, especially for the low frequency heart sounds. Other stetho-

scopes provide the internal body sounds not directly from the body surface, but through the air layer

between the body surface and the microphone.

®

The ADC

film contact microphone, which is at the heart of the ADC

The ADC

detect the heart and lung sounds more precisely.

657 solves those problems with the use of its piezopolymer

®

657 has wide frequency characteristics, enabling you to

®

657.

3. Name and function of each part

Piezopolymer film contact microphone beneath diaphragm

Soft touch volume control button to increase/decrease volume

Power ON/OFF and mode selection

LED: Indication of selected mode and low battery warning

B - Bell

D - Diaphragm (also battery indication light)

W - Wide (extended range)

Battery compartment

Binaurals and eartips

4. Operation

Binaural positioning

The ADC®657 electronic stethoscope is designed to
provide comfortable ear fittings and the best sound
transmission, considering morphology of the outer
ear canal. The binaurals (ear tubes) are angled at 15°

CORRECT

bridge of the nose to fit properly. The ADC
patient.

INCORRECT

to permit a comfortable, acoustically sealed aural
fit. Eartips should point forward, towards the

®

logo on the battery compartment should be visible by the

Adjusting spring tension

To reduce the tension, grip the binaurals firmly using both hands with
fingers at the center of the “Y” in the tubing,
where the tubing branches out. Flex bin
sired tension is obtained. To increase the tension, grip the binaurals
in the hand and squeeze the binaural tubes together gradually. Excessive

adjustment of the spring tension could weaken the spring.

Power ON/OFF

Press the one-touch soft power button lightly to turn the ADC®657
stethoscope on. A Green LED will light. Holding down the the power but­ton for 1.5 seconds turns off the ADC
out. The ADC

tion. Depressing any button extends “power on” time by 3 minutes.

®

657 turns off automatically after 3 minutes of last activa-

Volume control

During auscultation, press the volume button “ ’’to increase the sound
level, and press the volume button “ ’’ to decrease the volume. The vol­ume level is divided into eight levels.

thumbs at each side

aurals gradually until the de-

®

657, and the Green LED will go

Mode selection

After the Green LED light confirms that the power is on, the power button

an then be used for mode selection. As you press the power button, the

c
LED will cycle to the next mode. Continue pressing the power button
until your selected mode is illuminated. B - Bell (Low Frequency 15-

W - Extended (Wide Frequency 15-1000Hz). Bell provides excellent detection of low &
medium heart sounds and murmurs. Diaphragm is designed for the detection of pulmonary
sounds and high pitched murmurs, clicks, and ejection sounds. Extended Range allows the
practitioner a wide frequency response.

200Hz), D - Diaphragm (High Frequency 100-500Hz),

Replacing the battery

The low battery level indicator lamp is used with the middle LED (during
‘D’ mode). A Yellow light on the LED indicates the battery is weak. A Red
light on the LED indicates the battery needs immediate replacement. Open
the battery compartment cover by pulling down the notch on the cover,
and remove the old battery by carefully lifting it. Replace with new bat-

pleted battery in accordance with your local regulations.

tery. Be sure to insert battery polarity in cor­rect direction, then replace battery
compartment cover. Use only a AAA 1.5v bat­tery (not compatible with different types of
batteries), and dispose of or recycle the de-

Replacing the eartips

AdsoftTMeartips are threaded for a secure fit.
To remove for cleaning or replacement, turn
counterclockwise. To reattach, turn clock­wise.

Caution - Always check security of eartip

before inserting in ears.

Cleaning

It is unnecessary to disassemble the unit for cleaning. Use a slightly moistened cotton cloth with
alcohol to clean chestpiece diaphragm, binaurals, and eartips. Be careful to prevent alcohol seep­age under the diaphragm. It may cause significant damage to the microphone and electronic cir­cuits. Caution - Never immerse instrument in any liquid.

5. Specifications

Power supply: 1.5V (AAA Battery)

Electric current supply: 20mA (max)

Battery life: 150 hours under continuous power on

(approximately 3000 measurements at 3min/per.)

Weight: 6.17 oz. (175 grams)

Length: 29.1 in (74cm)

Frequency: Bell (15-200Hz)

Diaphragm (100-500Hz)

Wide/Extended Range (15-1000Hz)

Operating environment

• Temperature: -4°F to 140°F (-20°C ~ 60°C)

• Humidity: 20 to 90% Relative humidity

Storage environment

• Temperature: -4°F to 158°F (-20°C ~ 70°C)

• Humidity: 15 to 95% Relative humidity

Regulatory standards

EN 60601-1 (1988) Medical electrical equipment, Part 1: General requirements of safety

EN 60601-1-2 (1993) Medical electrical equipment, Part 1: General requirements Section 1.2

Collateral Standard: Electromagnetic Compatibility

6. Parts, Service, and Warranty

Replacement parts Item Number

• Battery AAABAT

• Eartips 602-07BK

LIMITED WARRANTY

American Diagnostic Corporation (ADC®) warrants its products against defects in materi­als and workmanship under normal use and service as follows:

1. Warranty service extends to the original purchaser for 2 years from the date of pur­chase.

2. The entire stethoscope is warranted. This warranty is only valid if the product is reg­istered online at

What is Covered: Repair, or replacement of parts, and labor.

What is not covered:Transportation charges to and from ADC

misuse, accident, or negligence. Incidental, special, or consequential damages. Batteries
or damage from old batteries is not covered by the warranty. Some states do not allow the
exclusion or limitation of incidental, special, or consequential damages, so this limitation
may not apply to you.

To Obtain Warranty Service: Send item(s) postage paid to ADC
merce Dr., Hauppauge, NY 11788. Please include your name and address, daytime phone
no., proof of purchase, a brief note explaining the problem, and $2.00 to cover the cost of
return shipping and handling.

Implied Warranty: Any implied warranty shall be limited in duration to the terms of this war­ranty and in no case beyond the original selling price (except where prohibited by law).
This warranty gives you specific legal rights and you may have other rights which vary
from state to state.

'2007 ADC. All rights reserved. No one is permitted to reproduce or duplicate in any
manual or any part thereof without the expressed written permission of ADC. ADC assume
responsibility for any injury to anyone, or for any illegal or improper use of the produ
result from failure to use the product in accordance with the instructions, cautions, w
statement of intended use published in this manual. The Adscope
marks of ADC.

www.adctoday.com.

®

. Damages caused by abuse,

®

, Attn: Service Dept., 55 Com-

TM

657 and AdsoftTMare trade-

ADC
55 Commerce Drive
Hauppauge, NY 11788
U.S.A.

ADC (UK) Ltd.
Unit 6, PO14 1TH
United Kingdom

IB p/n 93-657-00 rev 5 english

Inspected in the U.S.A.

tel: [phone]

Made in China

fax: [phone]

www.adctoday.com

email: [e-mail]