SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
4 –
Routine Measurements
51
Face-1/Face-2 measurements
Using F1/F2 measurements effectively cancels out mechanical constant error to obtain maximum
accuracy for measuring angles.
For the HA to be adjusted from a F1/F2 measurement, the backsight must also have been measured
in F1/F2 during the station setup.
To take F1/F2 data without taking a distance measurement:
1. Sight the center of the target prism, and press
[MSR1]
/
[MSR2]
(this step can be omitted if not taking
a distance measurement).
2. From the
Angle
menu, press
[4]
to select
F1/F2
.
3. The system displays according to the current vertical
circle reading. If the vertical circle is on F2, the message
Turn to F1
appears. If the vertical circle is on F1, the
message
Turn to F2
appears.
4. Rotate the alidade, and use the horizontal clamp and
horizontal tangent screw to sight the same target.
5. Press
[REC/ENT]
, the program will calculate the
observation value of F1/F2.
If a distance measurement has already been taken to the
target, F1/F2 averaging can be initiated by flipping the
telescope to the other face.
6. If satisfied with the result, press the
OK
softkey, else
press the
Abrt
softkey. The Basic Measurement screen appears.
Hold
To hold the horizontal angle to the current value:
1. Press
[ANG]
to open the
Angle
menu.
2. Rotate the horizontal circle to the required horizontal
angle, or manually enter the angle value.
3. Press
[5]
(or press
[v]
and
[REC/ENT]
) to select
Hold
.
