Patent ID: 11906554
Assignee: MEGGER INSTRUMENTS LTD
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of operation of a meter for performing a measurement of an electrical parameter, the method comprising, in the meter:
sampling an output from a sensor of the electrical parameter to produce at least one sample; and
iteratively performing steps of:
sampling the output from the sensor to produce one or more further samples;
processing the at least one sample and each of the one or more further samples to generate a plurality of processed samples;
holding in memory a stored array of processed samples for each iteration;
determining a measure of statistical variability from the stored array of processed samples for the respective iteration;
determining a measure of statistical variability of a mean of the processed samples for the respective iteration from the measure of statistical variability and from the number of samples used to generate the measure of statistical variability;
comparing the measure of statistical variability of the mean of the processed samples with a pre-determined threshold; and
generating an electrical signal indicating a state of the measurement if the measure of statistical variability of the mean of the processed samples is less than or equal to the pre-determined threshold,
wherein said processing comprises processing the at least one sample and each of the one or more further samples to derive a curve describing a trend and each processed sample represents a difference between the respective sample and the curve.