5 Check & Adjust
5.1 Overview
Leica Geosystems instruments are manufactured, assembled and adjusted to
the b
est possible quality. Quick temperature changes, shock or stress can
cause deviations and decrease the instrument accuracy. It is therefore recom-
mended to check and adjust the instrument from time to time. This check and
adjust can be done in the field by running through specific measurement pro-
cedures. The procedures are guided and must be followed carefully and pre-
cisely as described in the following chapters. Some other instrument errors and
mechanical parts can be adjusted mechanically.
For a TS13 basic variant, Check & Adjust must be done remotely using a CS20.
The following instrument errors can be checked and adjusted electronically:
Instrument error Description
l, t Compensator longitudinal and transversal index
er
rors
i Vertical index error, related to the standing axis
c Horizontal collimation error, also called line of
sight error
a Tilting axis error
ATR ATR zero point error for Hz and V
If the compensator and the horizontal corrections are activated in the instru-
men
t configuration, every angle measured in the daily work is corrected auto-
matically. Check whether the tilt correction and the horizontal correction are
turned on.
The results are displayed as errors but used with the opposite sign as correc-
tions when applied to measurements.
The following instrument parts can be adjusted mechanically:
•
C
ircular level on instrument and tribrach
•
Optical plummet - option on tribrach
•
Allen screws on tripod
To get precise measurements in the daily work, it is important:
•
T
o check and adjust the instrument from time to time.
•
To take high precision measurements during the check and adjust proce-
dures.
•
To measure targets in two faces. Some of the instrument errors are elimi-
nated by averaging the angles from both faces.
During the manufacturing process, the instrument errors are carefully deter-
mined and s
et to zero. As mentioned above, these errors can change and it is
highly recommended to redetermine them in the following situations:
Description
☞
Electronic adjustment
Mechanical
adjustment
Precise
measurements
☞
Check & Adjust 49
To Next Page
Loading...
