Fluke 435 user manual Measurement Method

	Specifications
	Electrical Measurements23
MEASUREMENT METHOD
Vrms, Arms	10/122 or 150/180 (selectable) cycle contiguous non overlapping intervals using
	500/4162 samples per cycle in accordance with IEC 61000-4-30
Vpeak, Apeak	Absolute highest sample value within 10/122 cycle interval with 40µs sample
	resolution
V Crest Factor	Measures ratio between the Vpeak and Vrms
A Crest Factor	Measures ratio between the Apeak and Arms
Hz	Measured every 10 sec in accordance with IEC61000-4-30
Vrms½ ,Arms½	Value is measured over 1 cycle, commencing at a fundamental zero crossing,
	and refreshed each half-cycle. This technique is independent for each channel
	in accordance with IEC 61000-4-30.
Harmonics	Calculated from 10/12-cycle gapless harmonic group measurements on
	Voltage and Amps according to IEC 61000-4-7
Watt	Selectable Total or Fundamental real power display
	Calculates average value of instantaneous power over 10/12 cycle period for
	each phase Total Active Power P T =P1 + P2 + P 3
VA	Selectable Total or Fundamental apparent power display
	Calculates apparent power using Vrms x Arms value over 10/12 cycle period
	Total Apparent Power is root mean square of real and apparent power
VAR	Selectable Total of Fundamental reactive power display
	Calculates reactive power as root of VA squared minus Watt squared over
	10/12 cycle period. Capacitive and inductive load is indicated with capacitor
	and inductor icons
Power Factor	Calculated Watt / VA
Cos ϕ / DPF	Cos of angle between fundamental voltage and current
Unbalance	The supply voltage unbalance is evaluated using the method of symmetrical
	components according to IEC61000-4-30
Flicker	According to IEC 61000-4-15 Flickermeter - Functional and design
	specification. Includes 230V 50Hz lamp and 120V 60Hz lamp models
Transient capture	Captures waveform triggered on wave shape. Additionally triggers on dips,
	swells, interruptions and Amps level as specified by IEC61000-4-30
Inrush current	The inrush current begins when the Arms half cycle rises above the inrush
	threshold, and ends when the Arms half cycle rms is equal to or below the
	inrush threshold minus a user-selected hysteresis value. The measurement is
	the square root of the mean of the squared Arms half cycle values measured
	during the inrush duration. Each half-cycle interval is contiguous and non-
	overlapping as recommended by IEC 61000-4-30. Markers indicate inrush
	duration. Cursors allow measurement of peak Arms half cycle.

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