|
When
the PA button is used to raise the alarm, the alarm signal is sent
immediately to the panel and indication is given as to which transmitter
sent the alarm. The Lone Worker transmitter is also latched into an alarm
condition on activation, and will activate its on board sounder to assist
with location and alert anybody in the near vicinity. The transmitter will
also continue to send out radio alarm signal and if the panel is reset
without attending to the Lone Worker the panel will be repeatedly
re-triggered. To prevent accidental abortion of the panic signal, once in an
alarm condition a Lone worker transmitter can only be reset by pressing both
the reset buttons simultaneously on the transmitter.
If the
motion sensor fails to detect any movement from the user for a pre-set
period of time, for example 90 seconds, the unit will emit a loud pre
warning sound for a short period, eg.15 seconds, during which time, the
transmitter may be reset by either tapping the unit sharply, or pressing the
pause button. If the unit is not reset during the pre warning period a
distress signal will be sent to the receiver panel as if the PA button had
been pressed. When an alarm signal is received at the panel it will be
displayed on the panel with audible indication and it can be used to drive
sounders, Supervisory Control And Data Acquisition (SCADA) systems, telephone devices, radio paging, relay outputs etc.
Systems may be single or multi channel and the receivers may be fixed,
portable, or vehicle mounted. They can be integrated with GPS systems and
existing radio platforms to provide communications and location where the
usual methods of communication are impractical.
Operating System - It should be remembered that a Lone worker alarm
system, no matter how effective it may be, is only part of the solution. A
good solid set of procedures should be introduced concerning the use of the
system to ensure it is used properly, tested regularly and the staff know
what to do in the event of an alarm condition. A log similar to that used to
record fire alarm tests, incidents and maintenance works on the system could
well prove useful in keeping track of any problems.
Lone Worker System - Features. Different situations demand different
features and settings. Senflow systems are designed to be versatile and
flexible and as a result most of the features are programmable options. |
