20
be some time later. If a battery clock is in low power mode, removing and reinserting the
batteries, pressing the receive button, or shorting the reset pins will not enable for reception. A
mini-master will not help. In this case the clock must moved to a location in direct range of the
master clock. It may require up to a day to sync with the master. Once the clock is running and
displaying the correct time, it can be moved back to the original location.
Changing batteries in battery powered analog clocks
Batteries should be changed as soon as the clock second hand begins double stepping. If all
clocks are double stepping, then first check that the transmitter is operational. When changing
the batteries, bring the clock within direct range of the master clock or a calibrated mini-master
in transmit mode must be present.
Remove all batteries, then insert new batteries
.
All
replacement batteries must be new and of the same type.
After replacing the batteries, wait
one day for it to sync with the master and then return it to the original location.
If the clock is displaying the correct time after changing the batteries, but is double stepping the
second hand, go ahead and hang it back on the wall. Normal operation of the second hand
should start by the next day.
Pressing the REC button or shorting the reset pins on the back off the clock movement may not
cause the clock to receive a time update. Only removing all batteries and reinserting them will
completely reset the movement.
When the master clock receives a time update from a network or GPS time server, a time source
indicator (H, E or G) will appear in the right side of the LED display. E indicates the last time
update received was from a computer network time server. G indicates the last update received
was from a wireless GPS receiver. Multiple time sources may be used simultaneously. H
indicates the clock includes an ultra-high precision oscillator.
Digital clocks typically illuminate the decimal point to indicate they are in sync. Analog clocks
will step the second hand every two seconds if sync is lost for more than a day.
On 2.4 GHz devices, channels 0-15 correspond to 802.15.4 channel 11-26.
Analog Clock Power Saving Feature
The second hand motor uses 10 times the power of the hour/minute motor. Therefore, late model
RC60 movements include a feature to disable the second hand motor at times when no one is
around, such as at night and on weekends. Enabling this feature can extend the battery life many
years. Modes 37-77, 37-78 and 37-79 are used to configure this feature.
