Lectrosonics UM250b User Manual download pdf (Page 8)

BATTERY INSTALLATION

The transmitter is powered by a standard alkaline or lithium 9 Volt battery. It is important that you use ONLY a

LITHIUM battery for longest life. Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not ad-

equate. Ni-cad rechargeable batteries will only provide a few minutes of operation, or less, and will run down quite

abruptly. Alkaline batteries provide 2 hours of operation. Lithium batteries will provide up to 7 hours of operation. Care

should be taken not to leave a fully discharged lithium battery in the transmitter, as swelling of the battery can make it

difficult to remove from the compartment. The battery status circuitry is designed for the voltage drop over the life of

lithium batteries.

To open the battery compartment, press outward on the cover door in the direction of the arrow as shown in the

drawing. Only firm, sliding pressure is needed to open and close the battery door. Swing the door open and take

note of the polarity marked inside showing the location of the positive (+) and negative (-) terminals. You can see the

large and small contact holes inside the battery compartment with the door open.

Swing the

door open

Press outward on the

battery door in this

direction

Insert the battery correctly and close the cover by pressing the door closed and across, reversing the opening proce-

dure illustrated above. If the battery is inserted incorrectly, the door will not close. Do not force the door closed.

OPERATING INSTRUCTIONS

1) Install a fresh battery according to the instructions above.

2) Insert the microphone plug into the input jack, aligning the pins; be sure that the connector locks in.

3) Attach the antenna to the SMA connector on the top of the transmitter.

4) Mute the sound system.

5) Turn the transmitter power switch to the “ON” position.

6) Position the microphone in the location you will use in actual operation.

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Lectrosonics UM250b User Manual Page 8