Hytera DMR System Planner
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Lone Worker Process:
Figure 2.5.4-1: Lone Worker Process
2.5.5 Man Down
Man Down emergency is also used to protect you. When the radio tilts for over the
predefined time, it will trigger the emergency alarm automatically. This feature is
designed for users (such as police, firefighters, miners, etc.) in dangerous
workplaces.
The principle of this feature is that the gravity sensor built in the radio will sense the
tilting gradients. When the gradient is sensed over the preset value, the emergency
alarm feature will be activated. When the radio stays over the preset gradient for
the preset delay time, it will transmit the emergency alarm. If the radio is placed
upright during the alarm, it will quit from the alarm after another preset delay time.
Like Lone Worker, Man Down has Pre-Alert Time before the emergency alarm.
Within this period, if you place the radio upright, the radio will not transmit the
emergency alarm.
Compared with Lone Worker feature, Man Down feature is more sensitive and timely,
and it spends shorter time before triggering the alarm, while Lone Worker will wait at
least 1min before triggering the alarm. The Man Down feature is more suitable to
users in dangerous workplaces. However, more mistaken alarms may be sent by
radio with this feature than Lone Worker. Thus, it is more important to set the
reasonable emergency entry delay time and tilting gradient for the Man Down
feature.
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