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The following factors affect the range:
Atmospheric condition
Brightness
Object color
Surface finish
Object size
Angle to the object
Object structure
5. Cautions for use
− The NUM'AXES rangefinder employs an eye-safe laser. Nevertheless, do not switch
the unit while aiming at a human eye or while looking into the lens.
− Do not press jointly the On button and the Mode button.
− Keep the rangefinder out of reach of children.
− Do not disassemble the product.
− Do not use any power source other than a 3V CR2 Lithium battery.
− Make sure the battery polarity is correct.
− Remove the battery from the product if you are not using it for an extended period.
6. Maintenance
Lenses
− Do not wipe dust or sand from the lens, but rather blow it off or remove it using a
soft lens brush.
− Fingerprints may affect the lens surfaces after a time. The easiest way to clean lens
surfaces is to breathe on them and rub them using a clean optic-cleaning cloth.
− Use of a coarse cloth or unnecessary rubbing may scratch the lens surface and
eventually cause permanent damage.
− Do not use a velvet cloth or ordinary tissue, as it may scratch the lens surface.
Longer range with
Clear visibility
Low brightness
(twilight, overcast skies)
White or bright-colored
object
Object with shiny finish
Large size object
90° angle (perpendicular)
Homogeneous structure
(sign, wall)
Shorter range with
Haze, fog, snow, rain
High brightness
(sunshine)
Black object
Object with dull finish
Small size object
Sharp angle
Inhomogeneous structure
(bush, tree)
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