Automatic Standard Calibrations

On this tab sheet, the user defines if and how often gain calibrations and noise calibrations shall be performed. For gain calibrations, only the ambient target is used (one point calibr.), which is the fastest calibration. Reasonable periods are 5 minutes. The gain calibration does not correct for system noise temperature variations which is only required with periods of several hours or days (noise calibration). 
The noise calibration utilizes noise diode switching and the ambient target, thus takes about twice as long as the gain calibration. For the RPG-HATPRO, a relative calibration takes about 15 seconds while a noise calibration takes 35 seconds. The user can enable or disable each of these automatic calibration options and define the triggering. Additionally noise calibrations might be selected for only one of the two profilers.
Default Settings resets all standard calibration parameters to reasonable values, optimized for the specific instrument in use.