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I. INTRODUCTION
“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 people 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 (US) or ULC S531 (Canada) standard T3 alarm signal.
YOU MUST HAVE PROPERLY INSTALLED UL 217 OR ULC S531 LISTED AND
COMPLIANT T3 SMOKE ALARMS IN YOUR HOME BEFORE THE LIFETONE
HL™ BEDSIDE FIRE ALARM AND CLOCK WILL OPERATE CORRECTLY.
And it sounds like this:
The Lifetone HL™ Bedside Fire Alarm and Clock will detect this T3 pattern and
activate a loud, low (520 Hz) multiple frequency alarm, and activate the Lifetone
Bed Shaker (optional equipment).
What is a T3 smoke alarm? The UL 217 or ULC S531 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 a 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 (or ULC S531) compliant smoke alarms.
When a smoke alarm is detected, the model HLAC151 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 (RVs), 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. The "217" or “S531” identifies the applicable 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 !
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