Mobiles ingredient analyzing system and method for sample measurement proper and user navigation with this

The present invention relates to a method for sampling correct measurement with a mobile ingredient analyzing system, comprising a housing with a window, an interface for an external reference unit, a display and operating unit, a light source, an optical spectrometer, a camera, an internal reference unit, and an electronic control unit having. The method comprises the steps of: selecting a matching a sample to be examined Kalibrationsproduktes; Plausibility check the selected Kalibrationsproduktes, wherein an erroneous selection signals and a re-selection of an alternative Kalibrationsproduktes is initiated; Output to be observed measurement conditions, which include to be selected measuring point and the measurement duration, depending on the selected Kalibrationsprodukt; Detecting measured values ​​at the sample by means of spectrometer under the measurement conditions and the simultaneous monitoring of the measurement conditions; Processing of the detected measurement values ​​by an electronic control unit, wherein each measurement value is declared to be valid, has been detected in compliance with the measurement conditions; Outputting at least the validated measurement values, found on the display and control unit and another output or memory element.