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20. OFFSET MEASUREMENT
Find distance and coordinates of the center of the column.
If circumscription point (P1) and two circumscription points (P2, P3) of a column can be measured directly, the
distance to the center of the column (P0), coordinates and azimuth angle are calculated and displayed.
• The azimuth angle of the center of the column is 1/2 of total azimuth angle of circumscription points (P2) and
(P3).
PROCEDURE
1. Enter the instrument station data.
"13.1 Entering Instrument Station Data and Azimuth
Angle"
2. Press [OFFSET] in page three of OBS mode to display
<Offset>.
3. Select “Offset Clum” in <Offset>.
4. Sight the circumscription point (P1) and press [MEAS] to
begin measurement.
The measurement results are displayed. Press [YES].
• When [HVD] is pressed, display mode is switched from
coordinates to SD, ZA, HA-R.
5. Sight the left circumscription point (P2) and press [OK].
20.5 Column Offset Measurement
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