Glossary

 ElectricityMeter  -  A device that can measure the throughput of electricity
 GasMeter  -  A device that can measure the throughput of natural gas.
 measuredValue  -  The measured value of throughput of an energy medium. Positive values indicate input from the energy grid. Negative values indicate flow back to the grid.
 Measurement  -  A determination of energy througput in a certain time, on a certain moment.
 measurement  -  A determination of the value of a physical quantity.
 meter  -  The meter that made the measurement.
 Meter  -  A device that can measure the throughput of a energy medium
 time  -  The time at which a measurement is made.
 timeInterval  -  The time interval (in seconds) between two measurements.
 unit  -  The unit in which a measured value is expressed.