User's Manual

67
9.2 Angle offset Mode
This mode is specifically useful when setting up prism
difficulty. The mode is specifically useful when setting up prism
difficultly, e.g. in the center of a tree. Set up the prism at the
point ‘P’ which is the same horizontal distance away from the
instrument .The diagram for angle offset is as followed.
Instrument center
Station
Prism P
HD(f)
HD(r)
HD(r)=HD(f)
Offset point
Measured point
Target height
Instrument height
HD(f):The horizontal distance between offset
point between instrument center
HD(r):The horizontal distance between measured point
and instrument center
1) In the offset menu ,pres [2] or press [ENT] after
moving the cursor to enter the interface of
“Offset/Angle->Meas P, as showing in picture (1):