An electronic laboratory metering system for liquids comprising at least one electrical handheld metering device having at least one operation sensor unit detecting the operation of the handheld metering device and generating corresponding operating data and, in particular, storing said operating data in a storage device of the handheld metering device, the handheld metering device having an interface module by means of which the handheld metering device can be connected to an external network access device via a data connection, in particular for transmitting the operating data, the network access device being data-connectable to an external data processing system, the data processing system being data-connectable to at least one context parameter sensor unit at least indirectly detecting the operation of the handheld metering device and/or detecting environmental operating conditions of the handheld metering device and generating context parameter data therefrom, the metering system, in particular the data processing system, having a comparison unit configured at least to compare operating data of the operation sensor unit with target operating data and/or to compare context parameter data of the context parameter sensor unit with target context parameter data and to generate a comparison result, in particular a deviation of the data from the target data identified in the course of the comparison, characterized in that the metering system comprises a documentation unit which is configured to generate and to store protocol data sets relating to the operation of the at least one handheld metering device, in particular comprising at least the operating data and/or the context parameter data, the documentation unit being connected to the comparison unit in such a manner that the comparison results of the comparison unit can be transmitted to the documentation unit and the documentation unit is configured to store the comparison results as part of the protocol data sets, in particular in a manner assigned to the corresponding operating data and/or context parameter data, in particular to add to said comparison results after an operation of the handheld metering device has ended. at least one electrical handheld metering device having at least one operation sensor unit detecting the operation of the handheld metering device and generating corresponding operating data and, in particular, storing said operating data in a storage device of the handheld metering device, the handheld metering device having an interface module by means of which the handheld metering device can be connected to an external network access device via a data connection, in particular for transmitting the operating data, the network access device being data-connectable to an external data processing system, the data processing system being data-connectable to at least one context parameter sensor unit at least indirectly detecting the operation of the handheld metering device and/or detecting environmental operating conditions of the handheld metering device and generating context parameter data therefrom, the metering system, in particular the data processing system, having a comparison unit configured at least to compare operating data of the operation sensor unit with target operating data and/or to compare context parameter data of the context parameter sensor unit with target context parameter data and to generate a comparison result, in particular a deviation of the data from the target data identified in the course of the comparison, characterized in that the metering system comprises a documentation unit which is configured to generate and to store protocol data sets relating to the operation of the at least one handheld metering device, in particular comprising at least the operating data and/or the context parameter data, the documentation unit being connected to the comparison unit in such a manner that the comparison results of the comparison unit can be transmitted to the documentation unit and the documentation unit is configured to store the comparison results as part of the protocol data sets, in particular in a manner assigned to the corresponding operating data and/or context parameter data, in particular to add to said comparison results after an operation of the handheld metering device has ended.