Diamond Traffic Products TTC-4420 매뉴얼 - 페이지 8

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2. Install the lens hood so that the hood will shade the lenses from

precipitation and sunlight. This is important.

3. Install four fresh "D" cell alkaline batteries. If operating in cold weather

(freezing) use carbon zinc batteries

4. Hold the reflector in the beam, thus canceling the tone, and gradually move

toward the desired reflector location. (NOTE: THE TONE GENERALLY

CANNOT BE CANCELLED WHEN THE REFLECTOR IS HELD

CLOSER THAN ABOUT 8 FEET FROM THE SCANNER.)

5. As the light beam leaves the scanner it spreads out in the shape of a cone.

At the approximate reflector location, find the center of the beam by the

following procedure.