VI - WHAT TO DO IF...? ...CHECK.
What to do if...? … Check.
–The clock (powered by battery)
had stopped. –The battery has run out. Replace the battery.
Resetting of the time is, automatic for radio
synchronised clocks, manual for independent
clocks.
Dust on the battery contact terminals (+ and -) can
disrupt the power supply to the clock. Clean these
contact terminals with a soft dry cloth, if necessary.
–No synchronisation after the
installation. –Check that the type of signal send by the master
clock (min, ½ min, AFNOR/ Irig-B) is in accordance
with the type programmed in the clock.
–A receiver clock on a ½ minute
network is 30s late after the
installation.
–It is impossible for a slave clock to discern between
two 1/2 minute impulses which one is the master
clock minute stroke, the reversal of the two wires is
needed to correct the time.
–Minute or ½ minute parallel
receiver stopped. –Lack of impulse, check the master clock and the
network.
–½ minute serial network stopped. –Check that the network is not cut off.
Measure the in line intensity and check if it is
enough (from 65 to 100 mA).
–AFNOR / Irig-B receiver stopped
at 12h00. –Lack of impulse since more than 1 hour, check the
master clock and the network.
–The synchronous second hand is
stopped on a receiver clock. –The permanent supply powering second hand is
cut-off. Check this power supply.
–DHF clock stopped at 12h00. –No time message received for more than 24 hours,
check the master clock and the DHF transmitter or
batteries have run out then replace the batteries.
–Switch again a DHF clock to
“initialisation” mode. –If needed, (change of communication
channel, new installation…),
the clock can be switched
to “Initialisation” mode by
shunting the two pins (P)
for 3 seconds.
20
P