4-7
4 DISTANCE MEASUREMENT
4.7.1 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 A
0
to measure.
To measure the coordinates of the center position, operate the offset measurement after setting the
instrument height/prism height.
•
Set the instrument height/prism height before proceeding to the offset measurement mode.
•
When setting the coordinate value for the occupied station, refer to Section 5.1 “Setting Coordinate
Values of Occupied Point”.
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
{F1}
(ANG. OFFSET) key.
{F1}
4
Collimate prism P, and press the
{F1}
(MEAS) key.
Collimate P
{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).
You can choose the vertical angel setting when
sighting A0 from "Hold" or "Free". "Hold" is the
setting to fix the vertical angle regardless of
telescope direction. When "Free" is selected, the
vertical angle value varies in conjunction with the
telescope direction and SD (Slope Distance) and
VD (Vertical Distance) are updated on a real-time
basis.
To set this option, refer to Chapter 17
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 P1
↓
OFFSET-MEASUREMENT
HR: 120°30'40"
HD: m
MEAS --- NP/P ---
OFFSET-MEASUREMENT
HR: 110°20'30"
HD* [n] << m
>Measuring...
