Leica LS10 - Check & Adjust; Overview

14 Check & Adjust
14.1 Overview
Leica Geosystems instruments are manufactured, assembled and adjusted to
the best 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 eld by running through specic 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.
During the manufacturing process, the instrument errors are carefully determ-
ined and set to zero. These errors can change and it is highly recommended to
determine them again for any of the following situations:
•
Before the instrument is used for the rst time.
•
Before every high precision levelling task.
•
After rough or long periods of transport.
•
After long periods of work or storage.
•
If the temperature difference between current environment and the tem-
perature during the last calibration is more than 10°C (18°F).
You can carry out the following digitally supported adjustment tasks:
•
Correcting the collimation error (refer to 14.3 Adjusting Line of Sight
Error).
•
Aligning the camera crosshairs (refer to 14.5 Aligning the Camera
Crosshairs).
•
Calibrating the digital compass (refer to 14.6 Calibrating the Digital Com-
pass).
•
Adjusting the digital bubble (refer to 14.8 Adjusting the Digital Bubble).
You can adjust the following instrument parts mechanically:
•
Circular level of the instrument (refer to 14.7 Adjusting the Circular Level
of the Instrument).
•
Optical crosshairs (refer to 14.4 Adjusting the Optical Crosshairs).
•
Screws on the tripod (refer to14.9 Servicing the Tripod).
14.2 Preparation
Before determining the instrument errors, level the instrument
using the circular level and, if available, the digital bubble.
Ensure, that the circular level is adjusted (refer to 14.7 Adjust-
ing the Circular Level of the Instrument).
The tribrach, the tripod and the ground should be very stable
and safe from vibrations or other disturbances.
During the calibration, protect the instrument and if possible
also the levelling staffs from direct sunlight in order to avoid
uneven thermal expansion on one side only.
Description
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Digital adjustment
Mechanical Adjust-
ment
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Check & Adjust 97