Operation Zoom90 | 31
Description of the LED Indicators
4.11 Guidelines for Correct Results
Distance measurement
When measurements are being made using the red laser EDM, the results can be influenced by objects
passing between the EDM and the intended target surface. This occurs because reflectorless measure-
ments are made to the first surface returning sufficient energy to allow the measurement to take place.
For example, if the intended target surface is the surface of a building, but a vehicle passes between the
EDM and the target surface as the measurement is triggered, the measurement may be made to the side
of the vehicle. The result is the distance to the vehicle, not to the surface of the building.
If using the long range measurement mode (> 1000 m, > 3300 ft) to prisms, and an object passes within
30 m of the EDM as the measurement is triggered, the distance measurement may be similarly effected
due to the strength of the laser signal.
Very short distances can also be measured reflectorless in Prism mode to well reflecting natural targets.
The distances are corrected with the additive constant defined for the active reflector.
CAUTION
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.
Accurate measurements to prisms should be made in Prism mode.
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.
Do not measure with two instruments to the same target simultaneously to avoid getting mixed return
signals.
IF the is THEN
Power LED off power is off.
green power is on.
Link LED off no radio link to field controller.
red radio link to field controller.
Data Transfer LED off no data transfer to/from field controller.
green or green
flashing
data transfer to/from field controller.
Mode LED off data mode.
red configuration mode.
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