DESCRIPTION OF CONTROLS, INDICATORS, ALARMS & CONNECTIONS
3-20 SERHT50NA A0808
Battery Low Alarm
(automatic)
Audible Alarm: Intermittent 3-pulse caution beeps
Visual Alarm: Int. Battery indicator blinks yellow
Message Window: Battery Low
Indicates that a minim
um of 30 minutes of operating power
remains in the dual internal battery. Pressing the Silence/Reset
button will cancel the audible three-pluse caution beeps but the
visual alarm will continue to blink and the alarm will beep once
every three minutes as long as the alarm condition continues. The
alarm is reset when A.C. or external D.C. power is connected to
the HT50.
NOTE: The battery condition and ventilator settings will affect
remaining time
, but it will be at least 30 minutes.
Battery Empty Alarm
(automatic)
Audible Alarm: Intermittent beep
Visual Alarm: Int. Battery indicator blinks red
Message Window: BATTERY EMPTY
Indicates that a minimum of 15 minutes of oper
ating power
remains in the dual internal battery. An alternate power source
must be located immediately. This alarm can only be temporarily
silenced as long as the alarm condition continues. The alarm is
reset when A.C. or external D.C. power is connected to the HT50.
NOTE: The battery condition and v
entilator settings will affect
remaining time, but it will be at least 15 minutes.
NOTE: Frequent deep discharge of the dual internal battery will
decrease the amount of time the HT50 will oper
ate on battery
power from a full charge state. Replace the battery when battery
operation time is insufficient for application.
WARNING Immediately secure an external power source when
the Battery Empty alarm is violated. Charge the batter
y for a
minimum of 5 hours (~80% recharged) before powering the
ventilator again from the internal battery. If the battery is completely
depleted, it takes approximately 7 to 8 hours to fully recharge.
NOTE: If the HT50 is to be pow
ered from the dual internal battery
for an extended period, ensure that the dual internal battery is fully
charged prior to use.
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