Establishing AC voltage traceability at frequencies below 10 Hz

The LF measurement system is now used for both design evaluation and the NAMAS calibration of DVMs down to 0.05 Hz, although the external demand for this type of measurement is comparatively low amounting to approximately 5 calibrations per year. It is expected that the demand will increase significantly in the future. The LF ACV measurement system has proved to be very useful in substantiating instrument performance in an area where it was previously very difficult to establish traceability