For Total Stations temperature, pressure, and humidity all effect the accuracy of the EDM because they influence the return value of the signal. These are set using a local observation of the various values. Culmination and compensation are internal adjustments to the sensor measurements within the total station.
For general work:
The temperature, pressure, and humidity settings only need changing when there are obvious changes in the conditions; cold mornings/hot afternoons, incoming storm fronts, fog moving in, etc.
Culmination and compensation should be adjusted generally at least monthly and anytime the instrument is subject to something that might alter it; transportation, exposure to conditions outside its published parameters, any kind of physical shock, etc.
We recommend instruments receive yearly calibrations and adjustments to ensure continued accurate readings.
Environmental variables affecting your total station
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