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20. OFFSET MEASUREMENT
7. Press
[OK]
on the screen of step
5 to calculate and display the
distance and angle of the target
point.
8. Press
[YES]
to return to <Offset>.
• Press
[XYZ]
to switch the screen
display from distance values to
coordinate values. Press
[HVD]
to return to distance values.
• Press
[NO]
to return to the
previous distance and angle.
• To record the calculation result,
press
[REC]
.
Sighting the direction of the target point to find it from the included angle.
Install offset points for the target point on the right and left sides of and as close
as possible to the target point and measure the distance to the offset points and
the horizontal angle of the target point.
• During collimation of the measured point A0, the vertical angle can be fixed at
the prism position or set to be moved according to the upward/downward
movement of the telescope.
• If the vertical angle is set to be moved according to the movement of the
telescope, slope distance (SD), vertical direction (VD), Z coordinate (Z) vary
depending on the collimation height.
20.2 Angle Offset Measurement
SD
ZA
HA-R
XYZ
REC
NO
YES
A0
A1
Target height
Offset Point
(Target)
Target Point
Instrument Staiton