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3.
INITIAL STARTUP AND TIME SETTING
3.1 Impulse slave clock
A time distribution network emits only impulses, so it is necessary to set the slave clocks at the time
of this network.
It is not necessary to stop the distribution to add a clock. It is enough to set it on time using the thumb
wheel and when it will receive the next impulse from the master clock, it will add a unit (Minute or
Second according to the type of impulse).
3.1.1 Minute 24V // receiver
After connecting the impulse line to the terminal of the
clock, allow to run for 2 minutes.
If the clock is one minute late, reverse the connection of
the wires on the terminal block and advance the clock by
2 minutes.
In fact, the same impulse is either positive or negative
depending on the way to connect and depending on the
initial position of the movement, it will take or not the first
impulse.
3.1.2 Second 24V // receiver
A "Second" distribution network emits only impulses.
It is then necessary to set the slave clocks at the time of
this network using the thumb wheel on the movement.
3.2 AFNOR clocks with ELV power supply
When first powered on, the clock hands are set at 4:00 or at noon until a time message is received.
Once the data is validated (three successive coherent messages received), the clock will automatically
set itself to the correct time with a fast advance.
Without power supply, the clock operates for more than one hour.
If the clock has got a second hand, the latter stops at 12h. When the clock has no more running
reserve, it stops.
When power is restored, if the AFNOR signal is present, the clock resets itself to the correct time.
It the AFNOR signal is absent and the power reserve is empty, the clock is set to a first position (4h
or 12h).
The AFNOR clock synchronises continuously with the AFNOR signal except between
2:55 p.m. and 4:16 p.m. to avoid disturbance on the control of its hands' position.
A lack of signal of 1 hour is allowed; during that time, the clock operates on its own. If the signal
comes back within the hour, the clock resets itself to the correct time. After 1 hour, the hands are set
at noon until data is retrieved.
Movement
Movement
2
1
EN
Thumb wheel
Thumb wheel
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