Operation Zoom | 45
instrument and the point to be measured, the EDM may measure to the
obstruction.
• Be sure that the laser beam is not reflected by anything close to the line of
sight, for example highly reflective objects.
• Avoid interrupting the measuring beam while taking reflectorless measure-
ments or measurements using reflective foils.
• Do not measure with two instruments to the same target simultaneously.
IR measure-
ments
• Accurate measurements to prisms should be made in IR-Default mode.
• Measurements to strongly reflecting targets such as traffic lights in Prism
mode without a prism should be avoided. The measured distances may be
wrong or inaccurate.
• When a distance measurement is triggered, the EDM measures to the
object which is in the beam path at that moment. If for example people,
cars, animals, or swaying branches cross the laser beam while a measure-
ment is being taken, a fraction of the laser beam is reflected from these
objects and may lead to incorrect distance values.
• Measurements to prisms are only critical if an object crosses the measuring
beam at a distance of 0 to 30 m and the distance to be measured is more
than 300 m.
• In practice, because the measuring time is very short, the user can always
find a way of avoiding unwanted objects from interferring in the beam
path.
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