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The Backsight screen appears.
4.
Select an input method for defining the
backsight point.
To sight the backsight by entering
–
coordinates, see the following section.
To sight the backsight by entering the azimuth and angle, see
–
Sighting the backsight by entering coordinates
Z
X0
1.
To enter coordinates for the backsight point
(BS), press
or select
[1]
screen.
2.
Enter the point name. If the point exists in the
job, its coordinates are shown.
3.
If you intend to take a distance measurement to
the BS, enter the height of target in the HT field.
4.
Sight the BS on Face-1 (F1). Press
complete the setup.
To record a full shot (with HA, VA, and SD
–
values) to the BS, press
AZ
Azimuth calculated by coordinates
If you are measuring to a known coordinate
–
BS, press
[DSP]
QA screen shows the dHD and dVD values,
which indicate the difference between the
measured distance and the distance
calculated from the known coordinates.
5.
To record the station, press
X
Xb
Station point
(Xi, Yi, Zi)
Y0
Yb
in the Backsight
Coord
[ENT]
or
[MSR1]
to display a QA screen. The
.
[ENT]
Backsight point
(Xb, Yb, Zb)
Y
to
.
[MSR2]
Field Station NPL-632 Instruction Manual
Applications 4
page
60.
59
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