Leica Geosystems T100 - Manual (Page 27)

27
T105/T110-1.3.0en Simple measurements
8
12
Instrument errors
Line-of-sight error (Hz-collimation)
The instruments are adjusted in the
factory prior to shipping.
Index-errors and line-of-sight errors
can change with time and
temperature.
These errors should be
determined before the
instrument is used for the first
time, before precision
surveys, after long periods of
transport, before and after
long periods of work, and if
the temperature changes by
more than 10°C (18°F).
T100Z16
C
The line-of-sight error or collimation
error (C) is the deviation from the
perpendicular between the tilting axis
and the line of sight.
The effect of the line-of-sight error to
the Hz-angle increases with the
vertical angle.
For horizontal aimings the error of Hz
equals the line-of-sight error.
The vertical circle should read
exactly 90° (100 gon) when the line
of sight is horizontal. Any deviation
from this figure is termed vertical
index error (i).
V-Index (Vertical index error)
T100Z13
i