I. INTRODUCTION
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“beep-beep-beep-pause” then “beep-beep-beep-pause”, and this continues. Some
alarms may have voice messages in the pauses. Those alarms will be compatible if, in
a true emergency, the voice messages are less than 1½ seconds long and fitted into
the 1½ second pause, or the voice message follows eight(8) consecutive T3 signals,
each 4 seconds in duration.
Scientific research has proven the 520 Hz alarm to be more effective at awakening
and alerting anyone with hearing loss. Together, the Lifetone HL™ alarm and the
optional Lifetone Bed Shaker provide effective awakening and alerting for those with
normal hearing loss that comes with age or exposure to loud noise, and the deaf.
Thank you for purchasing the Lifetone HL™ Bedside Fire Alarm and Clock. It is an
important part of your family’s safety plan. The Lifetone HL™ is not a smoke detector
and does not detect smoke. Instead, it detects the alarm sounds made by smoke
alarms and smoke alarm systems that are UL- listed, or Intertek-listed to, and
compliant with, the UL 217 standard T3 alarm signal.
YOU MUST HAVE PROPERLY INSTALLED UL 217 LISTED AND COMPLIANT
T3 SMOKE ALARMS IN YOUR HOME BEFORE THE LIFETONE HL™ BEDSIDE
FIRE ALARM AND CLOCK WILL OPERATE CORRECTLY.
And sounds like this:
The Lifetone HL™ Bedside Fire Alarm and Clock will detect this T3 pattern and
activate a loud, low and multiple frequency (520 Hz) alarm, and activate the
Lifetone Bed Shaker (optional equipment).
What is a T3 smoke alarm? The UL 217 compliant T3 pattern is an
alarm signal that is on and off for ½second three times in succession
followed by a 1½ second pause. An on/off representation of three
cycles of that sound looks like this:
The Lifetone HL™ Bedside Fire Alarm and Clock (“Lifetone HL™ Fire Alarm”) is an
assistive alerting device intended for use in a residence by individuals with hearing
loss or the deaf. It is to be placed in nighttime sleeping area next to a bed. The
Lifetone HL™ Fire Alarm will detect the T3 emergency signal given by existing,
properly placed UL 217-listed and UL -217 compliant smoke alarms. When a smoke
alarm is detected, the model HLAC150 will give its own emergency signal at a lower
frequency (520 Hz), which may be heard by individuals with hearing loss. The product
also gives its emergency signals visually on a display screen and with an optional
tactile Bed Shaker, either of which may be detected by deaf individuals in their beds.
The Lifetone HL™ Fire Alarm is not intended for use in marine watercraft, recreational
vehicles (“RV”), mobile homes, or hospitals.
What is UL? "UL" is Underwriters Laboratories, a global safety standards organization
that defines signals of this kind, as well as standards for a wide range of commercial
products; "217" identifies a particular safety standard for smoke alarms.
OFF OFF OFF OFF OFF OFF OFF OFF OFF
FOUR SECONDS FOUR SECONDS FOUR SECONDS
BEEP !
BEEP !
BEEP !
BEEP !
BEEP !
BEEP !
BEEP !
BEEP !
BEEP !