Product Manual

The procedure for the quick start Survey is identical to the procedure for the application Survey
available under the Apps menu. Therefore this procedure is only described once within the appli-
cation chapter. Refer to "11.2 Survey".
4.6 Distance Measurements - Guidelines for Correct Results
A laser distancer (EDM) is incorporated into the instruments. In all versions, the distance can be
determined by using a visible red laser beam which emerges coaxially from the telescope objec-
tive. There are two EDM modes:
•
Prism measurements (P)
•
Reflectorless measurements (NP)
•
When a distance measurement is triggered, the EDM measures to the object which is in the
beam path at that moment. If a temporary obstruction, for example a passing vehicle,
heavy rain, fog or snow is between the 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 exam-
ple highly reflective objects.
•
Avoid interrupting the measuring beam while taking reflectorless measurements or meas-
urements using reflective foils.
•
Do not measure with two instruments to the same target simultaneously.
•
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 measurement 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 dis-
tance 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 interfering in the beam path.
WARNING
Due to laser safety regulations and measuring accuracy, using the Long Range Reflectorless EDM
is only allowed to prisms that are more than 1000 m (3300 ft) away.
Description
Non-prism measurements
Prism measurements
34 Operation