Product selection guide: Power quality analyzers

	Remove	Remove
	Discontinued	Discontinued
	Fluke 438-II Power Quality Analyzer & Motor Analyzer	Fluke 434-II and 435-II Power Quality and Energy Analyzers

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Base measurements

DC current
Three-phase
Single-phase
RMS voltage
RMS current
Neutral current

Instrument features

Compact size for use inside panels
Status display only
Setup by laptop	Setup by tablet	Setup by tablet
Real-time display of measurements
On-instrument setup	External memory (CF, SD or USB stick)	External memory (CF, SD or USB stick)

Measurements

Residential / commercial	400Hz frequency measurements
Basic waveform display
Fast oscilloscope function
Phasor diagram
Power and energy
Total harmonic distortion
Voltage harmonics
Current harmonics
Power harmonics
K-factor
Inrush current (triggered)
400Hz frequency measurements

Operating environment

Industrial
Inside substation	Outside substation / transformer	Outside substation / transformer
Residential / commercial

Advanced measurements

Unbalance
Interharmonics
Power inverter efficiency
Energy loss calculator

Current range

< 1,600
> 3000A (option)

Measurement storage

Long-term RMS logging	Long-term waveform recording	Long-term waveform recording
Screenshots
Timed snapshots
Waveform recording

Advanced features

Automatic transient triggering
En50160 analysis
Flicker
IEC61000-4-30 compliance	Class A	Class A
Mains signaling
Phase sequence components
Transient capture > 1MHz	Transient capture < 1MHz
Transient capture < 1MHz		Transient capture > 1MHz

Powering options

Battery operated

Power from the measurement line

Power from the measurement line

Communications options

Ethernet, WiFi or USB

WiFi/USB

WiFi/USB

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