Sokkia 130R Series Operator's Manual page 19

4. SET FUNCTIONS
Peep sight
Use peep sight to aim the SET in the direction of the measurement point.
Turn the instrument until the triangle in the peep sight is aligned with the
target.
Instrument height mark
The height of the SET is 236mm (from tribrach dish to this mark).
"Instrument height" is input when setting instrument station data and is the
height from the measuring point (where SET is mounted) to this mark.
Laser-pointer Function
A target can be sighted with a red laser beam in dark locations without the
use of the telescope.
Operation panel
"5.1 Basic Key Operation"
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