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Product selection guide: Power quality analyzers

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Fluke 437 Series II 400 Hz Power Quality and Energy Analyzer - 1
Discontinued
Fluke 438-II Power Quality and Motor Analyzer
Discontinued
Fluke 437 Series II 400 Hz Power Quality Monitor and Energy AnalyzerFluke 438-II Power Quality Analyzer & Motor Analyzer
Unbalance   
Interharmonics   
Power inverter efficiency   
Energy loss calculator   
DC current   
Three-phase   
Single-phase   
RMS voltage   
RMS current   
Neutral current   
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) 
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 / commercial400Hz frequency measurements 
Industrial   
Inside substationOutside substation / transformerOutside substation / transformer 
Residential / commercial   
< 1,600   
> 3000A (option)   
Long-term RMS loggingLong-term waveform recordingLong-term waveform recording 
Screenshots   
Timed snapshots   
Waveform recording   
Automatic transient triggering   
En50160 analysis   
Flicker   
IEC61000-4-30 complianceClass AClass A 
Mains signaling   
Phase sequence components   
Transient capture > 1MHzTransient capture < 1MHzTransient capture < 1MHz 
Battery operatedPower from the measurement linePower from the measurement line 
Ethernet, WiFi or USBWiFi/USBWiFi/USB