Product Manual

64
Averaging Measurements to Reduce Sighting
Errors
The instrument automatically reduces sighting errors caused
by the misalignment of the instrument to the target or by pole
movement during measurement. The following techniques
can be used:
• Use Autolock. When Autolock is enabled, the instrument
automatically locks onto and tracks the target. Manual
sighting errors are reduced.
• Automatically average angles during distance
measurement. When measuring in Standard mode, the
instrument takes approximately 1.2 seconds to measure
the distance. Angles returned to the instrument at 1000 Hz,
are averaged over the 1.2-second period to obtain an
averaged angle measurement. The resultant angle
measurement is an average of over 1200 observations.
• Use average measurement methods in the field software.
Distance
Measuring
Technology
The instruments are equipped with a combined distance unit.
This means that the instrument can measure to a prism or to
normal surfaces (direct reflex (DR) mode).
FOCUS 50 Total Station EDM
The FOCUS 50 total station’s EDM is a pulsed laser distance
unit that determines distances by precisely measuring the
flight time of the transmitted light pulse. The distance unit
generates many short laser pulses, which are transmitted
through the telescope to the target. The pulses reflect off the
target surface and return to the instrument where the unit
determines the time difference between the transmitted
pulses and the received pulses. The unit uses the time
difference to calculate the distance to the target.
The distance unit includes additional functions that allow you
to control the accuracy and precision of a DR measurement
through the field application software.
Field application software includes:
• Standard Deviation. This allows you to configure the
required precision of the DR measurement before the
distance will be accepted. The distance measurement
process will be carried out by the instrument until the