Measurement algorithms
Amplitude measurement algorithms
AC RMS measurement algorithm
AC RMS is the true Root Mean Square of the data points about the Mean (µ). This measurement can be made across the entire record or
on each cycle in the record.
Area measurement algorithm
Area is the arithmetic area for one waveform. The area measured above ground is positive. The area measured below ground is negative.
Remember that one waveform is not necessarily equal to one cycle. For cyclical data you may prefer to use the cycle area rather than the
arithmetic area.
Details of the integration algorithm are given later Integration Algorithm.
Amplitude measurement algorithm
Amplitude is the dif
ference between the Top value and the Base value.
Amplitude = Top - Base
Base measurement algorithm
Base is calculated using the selected Base Top method. Base is the most common data value below the midpoint of the waveform, when
the default Base Top method Histogram Mode is selected. This measurement can be made across the entire record or on each cycle in the
record.
Integration algorithm
The integration algorithm used by the instrument is as follows:
W(t) is the sampled waveform
Ŵ(t) is the continuous function obtained by interpolation of W(t)
A and B are numbers between 0.0 and RecordLength – 1.0
If A and B are integers, then:
Measurement algorithms
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