Leica TPS700 Series User Manual

Distance measurement
A laser distancer (EDM) is
incorporated into the instruments of
the TPS700 series.
In all versions, the distance can be
determined by using an invisible
infrared beam which emerges
coaxially from the telescope
objective.
Reflector tapes can also be used,
and measurement is also possible
without a reflector.
When a distance
measurement is triggered,
the EDM measures to the object
which is in the beam path at that
moment.
time is very short, the user can
always find a way of avoiding these
critical situations.
Measurements to strongly
reflecting targets such as
to traffic lights in infrared mode
without prism should be avoided.
The measured distances may be
wrong or inaccurate.
For applications without reflector, the
TCRApower and TCRAultra version
also use a visible red laser beam
which emerges in the same manner.
A special arrangement of the EDM,
and appropriate arrangement of the
beam paths, enable ranges of over
five kilometres to be attained with
standard prisms.
If e.g. people, cars, animals, swaying
branches, etc. cross the laser beam
while a measurement is being taken,
a fraction of the laser beam is
reflected and may lead to incorrect
distance values.
Avoid interrupting the measuring
beam while taking reflectorless
measurements or measurements
using reflective foils. Measurements
to prism reflectors are only critical if
an object crosses the measuring
beam at a distance of 0 to 30m and
the distance to be measured is more
than 300m.
In practice, because the measuring
Incorrect result
Correct result
1100z46
1100z47
Introduction
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TPS700 User Manual 2.4.0en