Check & Adjust
FlexLine, 239
Vertical index 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. This is a
constant error that affects all vertical angle readings.
Access
1. Select
Tools
from the
MAIN MENU
.
2. Select
Adjust
from the
TOOLS MENU
.
•
Select:
•
HZ-collimation
, or
•
V-Index
.
The procedures and conditions required to correct line-of-sight and vertical index
errors are the same, therefore the procedure will only be described once.
a
Mechanical vertical axis of the instrument, also called
standing axis
b
Axis perpendicular to the vertical axis. True 90°
c
Vertical angle is reading 90°
d
Vertical index error
By determining the vertical index error the elec-
tronic level is adjusted automatically
b
c
d
a
TSOX_063