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7-16
7 DATA COLLECTION
7.3.4 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).
Example: Non-prism measurement
Operating procedure Operation Display
1Press the [F3](MEAS) key and press the [F4]key
to get to the next soft key page. [F3]
[F4]
2Press the [F1](OFSET) key. [F1]
3Press the [F4](P1
) key. [F4]
4Press the [F1](COLUMN OFFSET) key. [F1]
5Collimate the center of the column (P1) and press
the [F1](MEAS) key.
Measuring will start.
After the measurement, angle measuring display
of the left side (P2) will be shown.
Collimate
P1
[F1]
P
P
P
2
3
P
PT#
PT-11
PCODE :TOPCON NP
R.HT : 1.200 m
INPUT SRCH MEAS ALL
PT#
PT-11
PCODE :TOPCON NP
R.HT : 1.200 m
VH *SD NEZ P1
OFSET PTL NP/P P2
OFFSET 1/2
F1:ANG. OFFSET NP
F2:DIST. OFFSET
F3:PLANE OFFSET P
OFFSET 2/2
F1:COLUMN OFFSET NP
P
COLUMN OFFSET
Center NP
HD: m
MEAS --- NP/P ---
COLUMN OFFSET
Center NP
HD* [n] << m
>Measuring...
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