Horizon Fitness HTS-580 Series Operation Manual page 57

When doing coordinate measurement coordinates of occupied point, the instrument
height, the prism height and back sight azimuth should be set.
Operation procedure
Set the direction angle of
known
point A *1 )
Collimate target prism B, and
press key
*1Refer to Section 4.3 "Setting of Horizontal Angle".
In case the coordinate of instrument point is not entered, (0,0,0) will be used as the
default for the instrument point. The prism height will be calculated as 0 when the
prism height is not set.
Operation
Set
direction
angle
Collimate
target
prism
Display
57