Use of a system comprising a measurement device and an installation, wherein the measurement device comprises: at least one correction variable which is determined during a comparison in which analogue standard measurement variables are applied to the at least one measurement input, a measurement module having a processor which performs a measurement function by means of software, a first memory which is located in the measurement module and stores the at least one correction variable, at least one measurement function which is performed by means of the processor and the software, wherein the measurement function determines a digital measured value using the analogue measurement variable and the at least one correction variable and provides the installation with said measured value, at least one communication parameter for communicating with the installation and/or at least one application parameter for the use of the measured values by the installation during operation of the installation, and a second memory which stores the at least one communication parameter and/or at least one application parameter, wherein the measurement device is designed in two parts, wherein one of the two parts, which contains the second memory, is permanently installed on the installation and the other part is in the form of a separate measurement module, wherein the permanently installed part has a common interface with the installation, via which the installation has access to the at least one communication parameter and/or at least one application parameter independently of the measurement module, and the measurement module can be removed during operation of the installation, characterized in that the measurement module has two measurement inputs, namely a current input and a voltage input, to which a current and voltage are applied as analogue measurement variables for measurement, in that the measurement module can be removed after expiry of a predefined operating life during ongoing operation of the installation in order to check the correction variables stored in the first memory, wherein the exposed current input is short-circuited during removal, and in that a measurement module which has been checked and certified can be connected to the permanently installed part after it has been checked and after the check has been certified. at least one correction variable which is determined during a comparison in which analogue standard measurement variables are applied to the at least one measurement input, a measurement module having a processor which performs a measurement function by means of software, a first memory which is located in the measurement module and stores the at least one correction variable, at least one measurement function which is performed by means of the processor and the software, wherein the measurement function determines a digital measured value using the analogue measurement variable and the at least one correction variable and provides the installation with said measured value, at least one communication parameter for communicating with the installation and/or at least one application parameter for the use of the measured values by the installation during operation of the installation, and a second memory which stores the at least one communication parameter and/or at least one application parameter, wherein the measurement device is designed in two parts, wherein one of the two parts, which contains the second memory, is permanently installed on the installation and the other part is in the form of a separate measurement module, wherein the permanently installed part has a common interface with the installation, via which the installation has access to the at least one communication parameter and/or at least one application parameter independently of the measurement module, and the measurement module can be removed during operation of the installation, characterized in that the measurement module has two measurement inputs, namely a current input and a voltage input, to which a current and voltage are applied as analogue measurement variables for measurement, in that the measurement module can be removed after expiry of a predefined operating life during ongoing operation of the installation in order to check the correction variables stored in the first memory, wherein the exposed current input is short-circuited during removal, and in that a measurement module which has been checked and certified can be connected to the permanently installed part after it has been checked and after the check has been certified.