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recommended to plug the wall repeater into an outlet located high on
the wall to prevent accidental damage or tampering. Dropped ceiling
repeaters are also available.
Be sure to secure the wall repeater to the electrical outlet using the
screw hole provided in the repeater housing. The repeater in the photo
is typical for the USA and Canada. Repeaters for other countries typically consist of a wall or
shelf mounted enclosure with a separate AC power adapter with the appropriate plug.
Continue the signal survey until the mini-master indicates full coverage throughout the facility.
A redundant system using multiple master clocks can be used in a multi-building campus to
provide full coverage. Once full coverage is verified, the mini-master is no longer needed.
Battery powered analog clocks can be installed anywhere in the coverage area.
Analog Clock Installation in a Periodically Active Wireless Network
The master clock transmits time updates every other second (43,200 times per day). However,
analog wall clocks only turn their radios on for ten seconds, twice per day at 02:00:40 and
04:00:40. This means that a system-wide network is only formed during the time the analog
clocks have their radios enabled.
There are two recommended methods of initializing analog clocks. For small systems, the clocks
should be brought within 150 feet of the operating master clock. Insert batteries into the clock’s
battery holder. The clock will first move the hands 12 hours to obtain a known reference point.
The clock will then receive and process the time and begin moving the hands in about four
minutes. Once the hands start moving to the correct time, the clock can be installed in the
desired location.
For large system, a mini-master clock is recommended for installer(s) to carry while installing
clocks. This device allows inserting the batteries into the clocks at the location where the clock
will be installed. Once the clock has moved the hands to 12:00, the clock no longer needs the
presence of the mini-master clock. At this point, the installer can move on to install the next
clock.
Alternatively, repeaters, digital clocks, wireless relays and other externally powered devices can
be used to form a continuously active network with full facility coverage. In this case, analog
clocks can be installed without the need to use the mini-master clock.
DuraTime RC150 Mini-Master Clock
The optional RC150 Mini-Master clock is a hand-held unit used to install battery powered clocks
when a signal from the master clock is unavailable. Because battery powered clocks only power
on briefly seven times per day, a time signal may not be available in a particular area. The
RC150 Mini-Master clock provides a constant time signal so that clocks may be installed
regardless if the wireless network is active or not.
RC140 Wall Repeater
