SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
5 –
Applications
86
3-PT reference plane (S-Plane)
Measuring distance and offset values on a sloping plane.
1. From the
Program
menu, press
[7]
(or press
[v]
and
[REC/ENT]
) to select
S-Plane
.
2. Enter the first point (P1) to define the slope plane.
3. Enter the second point (P2) on the plane.
4. Enter the third point (P3) on the plane. If the
2PT
softkey
is pressed here, the program defines the plane by P1 and
P2.
Once the plane is defined, the calculated a and b values are updated as the telescope is moved.
No distance measurement is required.
Press
[v]
to display other screens as required.
5. To record the point, press
[REC/ENT]
on any screen.
6. Enter a value in the PT and CD fields. Press
[REC/ENT]
.
Note –
If the plane is defined by two points (by selecting the
2Pt
softkey), the vertical plane is the
same as the plane used in the V-Pln function, but the indicating factors are Sta and dZ, not a and b.
a
Distance between P1 and the point that is perpendicular to the target point along the P1-P2 line
b
Length of the perpendicular line from the target point to the P1-P2 line
Stn
P2
(X2,Y2,Z2)
P1
(X1,Y1,Z1)
P3
(X3,Y3,Z3)
Target
(X,Y,Z)
b
a
