OPERATING INSTRUCTIONS

Push buttons

Display Back-Light Button

Release MEAS button then press "" button to toggle between turning on and off the Back-Light. When releasing the MEAS button the Back-Light will turn off automatically after 15 seconds to extend battery life.

Laser Marker Button

Release MEAS button then press "" button to turn on the Laser Marker annunciator. If "" annunciator is turned on, press MEAS button and the laser marker beam will be emitted. Releasing MEAS button will turn off the laser marker beam.

MEAS (MEASURE) Button

Depress MEAS button to turn on the meter for measuring temperature. Release the MEAS button to stop measuring temperature and automatically hold the display reading. The meter turns off automatically after 15 seconds.

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Omega Vehicle Security OS643-LS manual Operating Instructions, Push buttons Display Back-Light Button