Product Selection Guide: Power quality analyzers

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

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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

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)
Residential / commercial		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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