Leica Builder Series User Manual page 16

Builder, Technical Terms and Abbreviations
Plumb line /
Compensator
Standing axis incli-
nation
Direction of gravity. The compensator defines the plumb
line within the instrument
Angle between plumb line and standing axis.
Standing axis tilt is not an instrument error and is not
eliminated by measuring in both faces. Any possible influ-
ence it may have on the horizontal direction resp. vertical
angle is eliminated by the dual axis compensator.
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