Manual

1. Introduction
Intended Use
• The ADC
®
657BK is an electronic stethoscope which transmits lung/heart sounds from a pa-
tient through auscultation. It amplifies sounds and removes noise by using a contact microphone and
electronic circuits.
Warning
• 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.
Warning - This product may contain a chemical known to the state of California to
cause cancer, birth defects, or other reproductive harm.
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 re-
moved 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.