Simmons LRF 600 Manual Del Usuario página 9

there is no reset button to clear last range reading before ranging another target:
• The last range reading does not need to be cleared before ranging another target. Simply aim at the new target
using the LCD's reticle, depress the power button and hold until new range reading is displayed.
if target range cannot be obtained:
• Make sure LCD is illuminated.
• Make sure that the power button is being depressed
• Make sure that nothing, such as your hand or finger, is blocking the objective lenses (lenses closest to the target) that emit and receive the
laser pulses.
• Make sure unit is held steady while depressing power button.
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