Spectra Precision Focus 8 Series - Setting the Measurement Mode and Preparing the Target; Measurement with a Prism

Spectra Precision Focus 8 Series Total Station User Guide 31
Preparation 2
Setting the measurement mode and preparing the target
The Focus 8 series has two measurement modes: Prism mode () and
Reflectorless mode (
). These modes can be changed at any time by holding
down the
 or  key for one second.
To set the measurement mode depending on the target you want to measure, see the
following table.
In some cases, you can measure another target that is not appropriate to the set
measurement mode.
Note – The Focus 8 2" is Laser Class 3R in the Reflectorless mode and Laser pointer
function, and Laser Class 1 in the Prism mode.
Don
’t sight the Prism when the Laser Pointer is on.
Note – Focus 8 5"
is a Laser Class 1 in the Prism and Reflectorless mode, and Laser Class 2
in Laser pointer function.
Measurement with a prism
Do not use a prism with scratches, a dirty surface, or a chipped center. Prisms with thin
edges are recommended.
As the Focus 8 series is extremely sensitive, multiple reflections on the prism surface
can sometimes cause a significant loss in accuracy.
Target Target setting
Prism, reflector sheet Prism (Prism mode)
Other (reflective materials) N-Prism (Reflectorless mode)
thin edges
chipped center thick edges