Machine Options dialog box - Environmental Parameters tab
Atmospheric Conditions
Use Temperature Station - Determines whether the Leica Meteo Station is used. A Meteo Station collects data automatically and requires no manual interaction.
If there is no Meteo Station connected, make sure that the correct values are entered manually. This is also possible from the Tracker status bar.
Air Temperature - Specifies the current temperature of the working environment in either Fahrenheit (F) or Celsius (C).
Pressure - Specifies the air pressure of your working environment in terms of mBar, HPascal, MmHg, or InHg.
Humidity - Specifies the percentage of humidity of your working environment.
These Meteo parameters have a direct influence on the distance measurement. A change of 1 °C causes a measurement difference of 1 ppm. A change of 3.5 mbar causes a measurement difference of 1 ppm.
Refraction Index
IFM - Displays the Interferometer refraction value.
ADM - Displays the Absolute Distance Meter refraction value.