Leica Viva TS16 User Manual page 55

☞
☞
☞
☞
ATRplus/Lock
☞
☞
☞
Operation
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 con-
stant defined for the active reflector.
WARNING
Due to laser safety regulations and measuring accuracy, using the Long Range
Reflectorless EDM is only allowed to prisms that are more than 1000m
(3300ft) 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.
Instruments equipped with an ATRplus sensor permit automatic angle and dis-
tance measurements to prisms. The prism is sighted with the optical sight.
After initiating a distance measurement, the instrument sights the prism
centre automatically. Vertical and horizontal angles and the distance are
measured to the centre of the prism. The lock mode enables the instrument
to follow a moving prism.
As with all other instrument errors, the collimation error of the automatic aim-
ing must be redetermined periodically. Refer to
ing and adjusting instruments.
When a measurement is triggered while the prism is still moving, distance and
angle measurements may not be made for the same position and coordinates
may vary.
If the prism location is changed too quickly, the target may be lost. Make sure
that the speed does not exceed the figure given in the technical data.
5 Check & Adjust about check-
55