inverting switching

In normal operating conditions the error correction is usually conducted shifting the transformation function of DC voltage calibrators by introducing a corrective quantity equal in value and opposite in sign to additive error. This additive error correction is performed in manual and automatic modes. Additive errors of DC voltage calibrators are mainly caused by zero bias of the transformation function of analog electronic components in electronic circuit and voltage drop in communication lines between different circuit nodes.

It is known that in order to ensure the metrological reliability of measurement industrial means, operative control of their metrological parameters in operating conditions and in real time is necessary to ensure metrological measurement. For this purpose, it is expedient to use portable, many-bit coded-controlled measures of electrical quantities, in particular DC voltage calibrators. Recently, the method of inverting switching is used to correct the error additive component in the measuring instruments.