Calibration Zoom | 177
Mechanical cali-
bration
The following instrument parts can be calibrated mechanically:
• Circular level on the instrument and tribrach.
•Laser plummet.
• Screws on the tripod.
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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.
• Before every high precision survey.
• After rough or long periods of transport.
• After long periods of work or storage.
• If the temperature difference between current environment and the
temperature at the last calibration is more than 10°C (18°F).
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