FlexLine, 238
Check & Adjust
Before starting to work, the instrument has to become acclimatised to the ambient
temperature. Approximately two minutes per °C of temperature difference from
storage to working environment, but at least 15 min, should be taken into account.
11.3
Adjusting Line-of-Sight and Vertical Index Error
Line-of-sight error
The line-of-sight error, or horizontal collimation error 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 horizontal direction increases with the vertical angle.
a
Tilting axis
b
Line perpendicular to tilting axis
c
Horizontal collimation, or line-of-sight, error
d
Line-of-sight
a
b
d
c
TSOX_062