Topcon GPT-3000 Series, Instruction Manual

Page: 47 / 180

4-11
4 DISTANCE MEASUREMENT
4.7.3 Plane Offset Measurement
Measuring will be taken for the place where direct measuring can not be done, for example distance or
coordinate measuring for a edge of a plane.
Three random prism points (P1, P2, P3) on a plane will be measured at first in the plane offset
measurement to determine the measured plane. Collimate the measuring target point (P0) then the
instrument calculates and displays coordinate and distance value of cross point between collimation
axis and of the plane.
●
When setting the coordinate value for the occupied station, refer to Section 5.1 “Setting Coordinate
Values of Occupied Point”.
Example: Non-prism measurement
Operating procedure Operation Display
1
Press the [F4](P1
↓
) key from distance measuring
mode to get the function on page 2.
[F4]
2
Press the [F1](OFSET) key.
[F1]
3
Press the [F3](PLANE OFFSET) key.
[F3]
4
Press the [F3](NP/P) key to change to the non-
prism mode.
[F3]
5
Collimate first point P1, and press the [F1](MEAS)
key.
N-time measuring will start.
After measuring, the display will show the second
point measurement.
Collimate
P1
[F1]
P
P
P 2
3 P
Target heights of P1 to P3 is set to zero automatically.
Edge
HR: 120°30'40"
HD: 123.456 m
VD: 5.678 m
MEAS MODE NP/P P1
↓
OFSET S.O S/A P2
↓
OFFSET 1/2
F1:ANG.OFFSET
F2:DIST.OFFSET
F3:PLANE OFFSET P
↓
PLANE
N001#:
SD: m
MEAS --- NP/P ---
PLANE
N001#:
N
P
SD: m
MEAS --- NP/P ---
PLANE
N001#:
N
P
SD* [n] << m
>Measuring...