RT-7690-2 User Guide
16
Power
Base Unit
The base unit can be powered by four “D” cell batteries (alkaline or non-alkaline) or by AC
power through a power adapter. Batteries
cannot
be recharged in the unit.
Low battery indicator
Low battery power is indicated by the base unit LED flashing yellow when 25 percent of battery
life remains (approximately five hours of use remaining). The LED flashes, and continues to flash
in a pattern of three seconds on/one second off, until the batteries are replaced or fail.
Battery replacement
The base unit battery compartment is located at the back of the unit, below the power switch and
AC/DC port. Open the compartment and replace the batteries, ensuring that the polarity is correct,
as shown in the diagram.
Caution: Remove all batteries from the RT-7690-2 base unit and RF remote control/laser
detector whenever the units are being stored for an extended period of time.
Power Standby mode
When no commands have been received for 25 minutes, the RT-7690-2 base unit automatically
enters Power Standby mode to save battery life. The base unit LED flashes green once per second
to indicate Power Standby mode. The timer is reset each time the user sends a command to the
base unit from the RF remote control or base unit, or if the laser detector is still in use.
To override Power Standby mode, press and hold the base unit Laser On/Off button
for
three seconds. This overrides power standby for the base unit. The base unit emits a beep and
two “chirps,” confirming that automatic power standby is disabled. After automatic power
standby is disabled, the base unit will continue to operate for a maximum period of eight
hours.
