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Product selection guide: Power quality analyzers

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Fluke 438-II Power Quality and Motor Analyzer
Fluke 435 Series II Power Quality and Energy Analyzer front view
Fluke 438-II Power Quality Analyzer & Motor AnalyzerFluke 434-II and 435-II Power Quality and Energy Analyzers
Automatic transient triggering   
En50160 analysis   
Flicker   
IEC61000-4-30 complianceClass AClass A 
Mains signaling   
Phase sequence components   
Transient capture > 1MHzTransient capture < 1MHz 
Transient capture < 1MHzTransient capture > 1MHz 
Unbalance   
Interharmonics   
Power inverter efficiency   
Energy loss calculator   
DC current   
Three-phase   
Single-phase   
RMS voltage   
RMS current   
Neutral current   
Ethernet, WiFi or USBWiFi/USBWiFi/USB 
< 1,600   
> 3000A (option)   
Compact size for use inside panels   
Status display only   
Setup by laptopSetup by tabletSetup by tablet 
Real-time display of measurements   
On-instrument setupExternal memory (CF, SD or USB stick)External memory (CF, SD or USB stick) 
Long-term RMS loggingLong-term waveform recordingLong-term waveform recording 
Screenshots   
Timed snapshots   
Waveform recording   
Industrial   
Inside substationOutside substation / transformerOutside substation / transformer 
Residential / commercial   
Battery operatedPower from the measurement linePower from the measurement line 
Residential / commercial400Hz 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