Column Offset Measurement - Topcon ES-62 Instruction Manual

4.7.4 Column Offset Measurement

If it is possible to measure circumscription point (P1) of column directly, the distance to the center of the
column (P0), coordinate and direction angle can be calculated by measured circumscription points (P2)
and (P3).
The direction angle of the center of the column is 1/2 of total direction angle of circumscription points
(P2) and (P3).

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
1
Press the {F4} (P1 ) key from distance measuring
↓
mode to get the function on page 2.
2
Press the {F1} (OFSET) key.
3
Press the {F4} (P ) key.
↓
4
Press the {F1} (COLUMN OFFSET) key.
5
Press the {F3} (NP/P) key to change to the non-
prism mode.
P
2
P
P
Operation
{F4}
{F1}
{F4}
{F1}
{F3}
4-13
4 DISTANCE MEASUREMENT
P 3
Display
HR: 120°30'40"
HD: 123.456 m
VD: 5.678 m
MEAS MODE NP/P P1
OFSET S.O S/A
OFFSET
F1:ANG. OFFSET
F2:DIST. OFFSET
F3:PLANE OFFSET
OFFSET
F1:COLUMN OFFSET
COLUMN OFFSET
Center
HD:
MEAS --- NP/P ---
COLUMN OFFSET
Center
HD:
MEAS --- NP/P ---
↓
↓
P2
1/2
↓
P
2/2
↓
P
m
N
P
m