Calibration vessel and method for calibration

A method for calibrating an optical immersion sensor using a calibration vessel, wherein:

• the calibration vessel is for an optical immersion sensor to be calibrated, which is designed for measuring, calibrating and/or adjusting a measured variable, comprising:
• a housing having a repeatably tightly sealable opening for introducing the optical immersion sensor;
• wherein the housing comprises a calibration solution in the interior thereof:
• wherein the housing provides the value for the calibration solution;
• wherein the opening comprises a guide for aligning and positioning the optical immersion sensor to be calibrated in relation to all possible spatial degrees of freedom;
• wherein the housing is designed such that the influence of the interactions between the light, emitted and received by the sensor, and the housing wall, in particular as a result of scattering, absorption, reflection, phosphorescence and fluorescence, on the measured value that can be ascertained by the sensor is minimal;
• wherein the volume of the calibration solution is minimized at the same time;
• the method comprising the steps of:
• homogenizing, in particular circulating, the calibration solution in the calibration vessel, in particular during the entire method;
• determining the measured variable for the calibration medium using the reference device or by reading the value specified on the calibration vessel or the housing;
• determining the measured variable for the calibration medium using the immersion sensor;
• and
• calibrating and/or adjusting the immersion sensor by comparing the measured value of the reference device, or the value specified on the calibration vessel or the housing, with the measured value of the immersion sensor.