STONEX R20 - Page 41

Stonex R20 – User Manual 40
be used to measure the centre of cylindrical targets such as piers, poles or trees.
1. Press [5]〈5.Angle Offset〉to enter {Angle Offset}.
2. Aim at the measurement point and press [F1]【Dist】to trigger the
distance measurement.
3. Rotate the instrument horizontally to aim at the point which have
the same orientation at the target point. Then press [F3]【OK】.
4. Workspace display the calculated result of the target point.
[F3]【Shift】: Convert the display data format between polar and
coordinates.
[F4]【Rec】: Record the result data of target point.
The measurement point should be as close as possible to the left or right of the target point. The distance from
the measurement point to the station should be equal to the distance from the target point to the station.
P
0
: Station
P
C
: Hidden point
P
A
: Prism A of rod
P
B
: Prism B of rod
L
BC
: Length of B-C (known)
Hidden Point Offset:
Hidden point is a target point that is not directly visible. By using a special hidden-point rod whose length was
known, hidden point program can be measured indirectly.