3M 2273E - Manual (Page 5)

TRANSMITTER BATTERY TEST
To test the Batteries, press and hold . Listen to the tone and watch
the display.
• solid tone and 'OK' indicates batteries good;
• beeping tone and 'LO' indicates batteries low;
• no tone and '- -' indicates replace batteries.
Note: The battery test indicates battery condition for normal output
levels. if the unit resets when the high output level is selected, use the
normal output level or replace the batteries.
Page 4
USING EXTERNAL DC POWER AND 5 WATT OUTPUT
The Transmitter can be operated from and external 12VDC source as well
as its internal batteries. Use the supplied cigarette lighter adapter cable to
connect the DC power from a vehicle's battery source to the Transmitter's
external power jack located next to the output jack.
Note: The internal batteries will not be recharged with external DC.
5 Watt Output
An external DC source is required for 5 watt output. To select 5 watt
operation, press
once for high output (3W) and again for 5 watt
operation. The High Output flag will turn on for 3W and flash for 5W.