Topcon GTS-823A - Manual (Page 73)

5-15
5 PROGRAM MODES
5.6.1 Angle Offset
This mode is useful when it is difficult to set up the prism directly, for example at the center of a tree.
Place the prism at the same horizontal distance from the instrument as that of point A0 to measure.
To measure the coordinates of the center position, operate the offset measurement after setting the
instrument height/prism height.
Operating procedure Operation Display
1 Press [F6](MORE) key from programs menu
to get to the next page of programs.
[F6]
2 Press [F2](OFFSET) key.
[F2]
3 Press [F1](ANGLE OFFSET) key.
[F1]
Prism P
Prism height
Instrument height
Occ. Point
When measuring coordinates of ground point A
1
:Set the instrument height/prism height.
When measuring coordinates of point A
0
: Set
the instrument height only. (Set the prism height
to 0 ).
When sighting to A
0
, you can select one of two
ways. [HOLD] is to fix vertical angle to the prism
position even updown the telescope position, and
[FREE] is to gear vertical angle to the updown of
telescope movement. In case following the
vertical angle to the movement of telescope,
SD(Slope Distance) and VD(Vertical Distance)
will be changed according to the movement of
telescope.
Programs
F1 BS p 4/7
F2 STORE p
F3 REM p
F4 MLM p MORE
Programs
F1 LINE p 7/7
F2 OFFSET p
F3 EXT.LINK p
MORE
OFFSET MEASUREMENT
1.ANGLE OFFSET
2.DIST. OFFSET
3.PLANE OFFSET
4.COLUMN OFFSET
ANGLE OFFSET
1.FREE V-ANGLE
2.HOLD V-ANGLE