Abstract: In order in a digital electricity meter (1) to permit flexibility in terms of user wishes, it is provided that, in addition to its basic meter (2) containing the basic metering functions, the electricity meter (1) includes an additional computing module (23) with which user-specific computations or functions can be implemented. In that way a virtual meter is formed within the electricity meter (1). Preferably the additional computing module (23) is accessible by way of an access module (20) and is freely programmable by the user without the calibrated function of the basic meter being violated.

Abstract: In order in a digital electricity meter (1) to permit flexibility in terms of user wishes, it is provided that, in addition to its basic meter (2) containing the basic metering functions, the electricity meter (1) includes an additional computing module (23) with which user-specific computations or functions can be implemented. In that way a virtual meter is formed within the electricity meter (1). Preferably the additional computing module (23) is accessible by way of an access module (20) and is freely programmable by the user without the calibrated function of the basic meter being violated.

Abstract: In an electronic energy consumption meter using a mark-space amplitude multiplier, including a current-frequency transducer, a first supervisory circuit is coupled to, and supervises the mark-space modulator multiplier, a second supervisory circuit is coupled to, and supervises the current-frequency transducer, and a fault indicator is coupled to the output of each of the supervisory circuits for indicating a fault in the meter.