Spectra Precision Focus 8 Series, Руководство пользователя

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Spectra Precision Focus 8 Series Total Station User Guide 4 9
Checking and Adjustment 4
The tolerance in angle reading to each
direction is 10". To maintain the accuracy
of the instrument, you must take shots
with extreme care. If the dHA to the same
direction is more than 10", an error
message appears, and you must remeasure
all three sets of points.
After three sets of F1/F2 observations, the
instrument calculates the trunnion axis
parameter and the updated ACH (the
average of each set).
3. Do one of the following:
–
To return to the measurement screen
for the first set of F1 measurements,
tap [Redo].
–
To go to the next set of observations
for a more accurate result, tap [Cont.]. You can record up to ten sets.
–
To store the parameter and return to the BMS, tap [End].
4. If HA corr. is set to OFF when you finish updating the trunnion axis parameter, a
message appears. The message asks if you want to change the setting. To change
the setting, tap [Yes].
Trunnion axis compensation
The trunnion axis error is reported when the vertical axis and the trunnion axis
(horizontal axis) are not perpendicular to each other. The sighting axis error is from
the sighting and the trunnion axes. These two errors can be compensated by applying
the Tr-axis and ACH parameters on this instrument to horizontal angle readings.
Because the amount of compensation changes according to the vertical angle, when
compensation is enabled there is a slight movement in horizontal angle even if you
clamp the tangent screw.
Tr-axis
ACH