#### Leica Environmental Parameters

Machine Options dialog box - Environmental Parameters tab

Atmospheric Conditions

- Use Temperature Station - This determines whether or not the Leica Meteo Station is used. A Meteo Station collects data automatically and requires no manual interaction.

- Air Temperature - Allows you specify the current temperature of the working environment in either Fahrenheit (F) or Celsius (C).

- Pressure - Allows you specify the air pressure of your working environment in terms of mBar, HPascal, MmHg, or InHg.

- Humidity - Allows you specify the percentage of humidity of your working environment.

Important: These Meteo parameters have a direct influence on the distance measurement. A change of 1°C causes a measurement difference of 1ppm. A change of 3.5mbar causes a measurement difference of 1ppm.

Refraction Index

- IFM - Displays the Interferometer refraction value.

- ADM - Displays the Absolute Distance Meter refraction value.