Check & Adjust; Overview; Preparation - Leica TS03 User Manual

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13.1
Description
Electronic adjustment
Checking parts
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13.2
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Check & Adjust
Check & Adjust

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 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.
The following instrument errors can be checked and adjusted electronically:
Horizontal collimation error, also called line-of-sight error.
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• Vertical index error, and simultaneously the electronic level.
Compensator longitudinal and transversal index errors
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Tilting axis error.
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The following instrument parts can be checked:
Circular level on the instrument and tribrach.
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Laser plummet.
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• Screws on the tripod.
During the manufacturing process, the instrument errors are carefully deter-
mined and set to zero. As mentioned, these errors can change and it is highly
recommended to redetermine them in the following situations:
Before the instrument is used for the first time.
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Before every high precision survey.
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• After rough or long periods of transport.
After long periods of work or storage.
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If the temperature difference between current environment and the tem-
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perature at the last calibration is more than 10°C (18°F).

Preparation

Before determining the instrument errors, the instrument has to
be levelled using the electronic level.
The tribrach, the tripod and the underground should be stable
and secure from vibrations or other disturbances.
The instrument should be protected from direct sunlight to
avoid thermal warming.
It is also recommended to avoid strong heat shimmer and air
turbulence. The best conditions are early in the morning or with
overcast sky.
Before starting to work, the instrument has to become acclimatised to the
ambient temperature. Approximately two minutes per °C of temperature differ-
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