Fluke 438-II Power Quality Analyzer & Motor Analyzer

The Fluke 438-II Power Quality Analyzer & Motor Analyzer adds key mechanical measurement capabilities for electric motors to the advanced power quality analysis functions of the Fluke 435 Series II Power Quality Analyzers. With the Fluke 438-II, users can quickly and easily measure and analyze key electrical and mechanical performance parameters such as power, harmonics, unbalance, motor speed, torque and mechanical power without the need of mechanical sensors. Fluke 434-II, 435-II and 437-II Power Quality Analyzer users can add motor analysis capabilities to their existing units with the Fluke-438-II/MA Motor Analyzer upgrade kit. The Fluke 438-II is also Fluke Connect compatible so you can view data locally on the instrument via Fluke Connect mobile app and PowerLog 430-II desktop software.

Product Info

Drive measurement details
Motor Type	3 phase asynchronous (induction)
Power Source	Variable Frequency Drive
Motor Frequency Range	40Hz to 70Hz
Over/Under Voltage from Nominal V/f Curve (%)	-15% to +15%
Carrier Frequency Range	2.5kHz–20kHz
Variable speed drive technology that is covered by the 438-II
Inverter Type	VSI only (voltage controlled)
Control Method	V/f control, open-loop vector, closed loop vector, drives with encoders
Frequency	40 to 70 Hz
Variable speed drive technology NOT covered by the 438-II
Inverter Type	CSI (current source inverter)
Motors Type	Synchronous (DC, stepper, permanent magnet etc.)
Motor Frequency	<40 and >70 Hz
Mechanical specifications
Mechanical measurements can be performed on direct online motors with a 3 wire connection.

Measure key parameters on direct-on-line motors and motors driven by specific variable frequency drive systems including torque, RPM, mechanical power and motor efficiency
Perform dynamic motor analysis by plotting of motor de-rating factor against load according to NEMA guidelines
Calculate mechanical power and efficiency without the need of mechanical sensors, just connect to the input conductors and you’re ready to go
Measure electrical power parameters such as voltage, current, power, apparent power, power factor, harmonic distortion and tunbalance to identify characteristics that impact motor efficiency
Identify power quality issues such as dips, swells, transients, harmonics and unbalance
PowerWave data technology captures fast RMS data, and shows half-cycle averages and waveforms to characterize electrical system dynamics (generator start-ups, UPS switching etc.)
Waveform capture function captures 100/120 cycles (50/60 Hz) of each detected event, in all modes, without set-up
Automatic transient mode captures waveform data at 200 kS/s on all phases simultaneously up to 6 kV

Fluke 438-II Power Quality Analyzer & Motor Analyzer

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