South NTS-960R, Руководство по эксплуатации

Страница: 69 / 214

62
7.6 OFFSET MEASUREMENT (OFFSET)
There are four offset measurement modes in the Offset Measurement.
1.Angle offset
2.Distance offset
3.Plane offset
4.Column offset
7.6.1 Angle Offset
This mode is useful when it is difficult to set up the prism directly, for example at the
centre of a tree. Place the prism at the same horizontal distance from the instrument
as that of point A0 to measure .To measure the Coordinate of the centre position,
operate the offset measurement after setting the instrument height/prism height.
●
When measuring coordinates of ground point A1: Set the instrument height/prism
height.
●
When measuring coordinates of ground point A0: Set the instrument height only.
(Set the prism height to 0)
●
In the Angle Offset Measurement Mode, there are two setting methods for the
vertical angle.
1.Free vertical angle
：
The vertical angle will be changed by rotating telescope.
2.Hold vertical angle
：
The vertical angle will be locked and never changed by rotating
telescope.
When sighting to A0, you can select one way, [Hold] is to fix vertical angle to the prism
position. When you select [Free], SD (Slope Distance) and VD (Vertical Distance) will
be changed according to the movement of telescope.
Example
：