Fluke 41B, 39 user manual Screen Abbreviations, Screen Usage Name and Description

39/41B Users Manual

	Table 3. Screen Abbreviations (cont)
Screen Usage		Name and Description
DPF		Displacement Power Factor cosφ fundamental
		The ratio of the active power (W) to the apparent power
		(VA rms) at the fundamental frequency. Equivalent to
		cosφ at that frequency. Traditional power factor for linear
		loads.
HZ		Waveform Screens: Fundamental frequency in hertz
		Harmonics Screens: Frequency of selected harmonic in
		hertz
KF		K-Factor
		A load current waveform rating calculation that rates the
		waveform’s capability to produce harmonic-related heat
		loss in transformers and other magnetic components.
		Used to select transformer K-ratings that match load
		current K-factor measurements.
PF		Power Factor
		Ratio of active power to apparent power (including all
		harmonics).True power factor for all loads, linear and
		non-linear.

%THD-FTotal Harmonic Distortion (as % of Fundamental)

Defines amount of harmonic distortion as a percentage of the waveform at the fundamental frequency.

%THD - F = rms of harmonics (less fundamental) rms of fundamental

%THD-RTotal Harmonic Distortion (as % of rms total)

Defines amount of harmonic distortion as a percentage of the rms value of waveforms at all frequencies (fundamental and harmonics).

%THD - R = rms of harmonics (less fundamental) total rms

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