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Check & Adjust
With the Leica DNA03/10 the optical as well as an
electronic collimation error can occur.
Electronic staff readings are automatically corrected
by the collimation error stored in the instrument.
Optical collimation errors have to be eliminated by
adjusting the reticle.
Procedure and general notices
The instrument offers two integrated field procedu-
res for electronic measurements.
"A x Bx" and "A x x B" (A and B are the staffs posi-
tions, x is the instrument position). Both procedures
cover two procedures each.
A x Bx
Procedure "from the center" (classic) and by
Kukkamäki.
A x x B
Procedure by Förstner and Näbauer.
The line-of-sight error is displayed in arc seconds.
With the following approximation arc seconds are
converted to circular measure.
1" = 0.1mm/ 20m resp. 2" = 0.001ft/ 100ft
The sequence of the staff to be measured (A1, B1,
B2, A2) must be adhered to in all four procedures:
Station 1
A1, B1
Station 2
B2, A2
The shorter of two aimings must always be
done first (not valid for measurements from
the center).
Where possible the distance ranges are checked.
A wrong instrument position is reported at once with
the correction factor.
After the fourth measurement the electronic line-of-
sight error is compared with the stored line-of-sight
error and displayed. The new line-of-sight error is
now set as corrective factor. The value for the opti-
cal reading for the reticle adjustment is displayed at
the same time.
