Bird Technologies AT-400 - Manual (Page 27)

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Chapter 3 Installation
The following paragraphs will explain how to connect the
Bird Antenna Tester for various operations. Refer to the
component description diagram on page 2 if needed.
Power Supply
The AT-400 can use an external power source. Using the ac
adapter or the 12V cigarette lighter adapter will also charge
the battery. Using the ac adapter, charge time is about 8
hours. Using the cigarette lighter adapter, charge time will
depend on the car battery charge. Battery life is 2 hours
continuous operation, minimum, with the backlight on. “Lo
Batt” is displayed when the batteries require charging.

NOTE: This unit is shipped with the batteries not
charged. Charge batteries for at least 8 hours before use.

NOTE: For optimum battery life, only charge the
batteries after the low battery indicator is displayed.
y AC Mains Adapter — To use the ac adapter, insert the
adapter’s barrel connector into the Antenna Tester’s dc
jack. Insert the adapter plug into a wall receptacle.
y Automobile Cigarette Lighter Adapter — Insert the
adapter’s barrel connector into the Antenna Tester’s dc
jack. The negative (–) symbol must be adjacent to the
word TIP as the center is negative and the outside is
positive. Insert the adapter plug into a cigarette lighter.
CAUTION
Only use the ac adapter provided with the AT.
Do not use the adapter with the batteries removed.
CAUTION
Required input is 11 to 16 VDC @ 250mA. Connector is
wired outside positive, inside negative.