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Powering the ELI 280
The ELI 280 is an AC powered and/or battery-operated device that can simultaneously charge the internal battery
while connected to AC power. It is recommended that it be plugged in to AC power when not in use. The device can
be operated on AC line voltage in the absence of a battery or in the event of an otherwise fully depleted battery.
When line voltage is removed the device immediately switches to battery power.
Operating on AC Power
Plug the power cord into an AC wall outlet and into the AC connector on the rear panel of the ELI 280.
(Reference Figure 1-3.)
When the ELI 280 is plugged into AC power, the green AC power LED indicator illuminates below the
ON/OFF button.
Press the ON/OFF button when on battery power or touch the screen when on AC power to illuminate
the real-time display.
A battery icon with an electrical bolt through the battery (seen in the upper right corner of the touchscreen
display) confirms that the device recognizes AC power and automatically controls battery charging.
NOTE: In the event of complete power loss due to battery removal or a hard reboot (depressing the
On/Off button for greater than 7 seconds) the ELI 280 will require a touchscreen recalibration and
time/date reset.
Operating on Battery Power
When operating on battery power, the battery icon changes to indicate its status:
WHITE with a lightning bolt indicates the unit is charging on AC power.
GREEN indicates battery is between 100% and 35% charge.
YELLOW indicates battery is between 35% and 20% charge.
RED indicates battery has less than 20% charge remaining. Immediately plug the ELI 280 into AC
power if the battery indicator turns RED.
NOTE: Automatic power down occurs approximately 10 seconds after the battery icon starts FLASHING
RED. Allow a minimum of 4 hours to recharge a battery to 85% of its charge level. Allow a minimum of
5 hours to recharge a battery to 90% of its charge level. The battery voltage may be viewed in the lower
right of the display by selecting the Configuration icon, then selecting About.
NOTE: A power down is accomplished by depressing followed by the Off button. To reboot the
unit from a complete power down, use the On/Off button.
CAUTION: If the battery voltage falls below 10.5 the device will automatically power down. After
recharging long enough for the battery voltage to rise above 10.5V the device may again be operated on
battery power. It may require up to 30 hours on AC line voltage to recharge the battery from its lowest
level. Routinely discharging a battery to the lowest level will severely shorten the life of the battery.
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