Product selection guide: Power quality analyzers

	Remove	Remove
	Discontinued	Discontinued
	Fluke 437 Series II 400 Hz Power Quality Monitor and Energy Analyzer	Fluke 438-II Power Quality Analyzer & Motor Analyzer

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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

Advanced measurements

Unbalance
Interharmonics
Power inverter efficiency
Energy loss calculator

Base measurements

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

Communications options

Ethernet, WiFi or USB

WiFi/USB

WiFi/USB

Current range

< 1,600
> 3000A (option)

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)

Measurement storage

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

Operating environment

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

Powering options

Battery operated

Power from the measurement line

Power from the measurement line

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

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