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Fluke 43B Single Phase Power Quality Analyzer

Fluke’s single phase analyzers perform the measurements you need to maintain power systems and troubleshoot power problems and diagnose equipment failures.


    This product is now discontinued, please chose an alternative product using this selector:

    Basic measurements

    Application use





    Basic V/I/W/Hz











    Power (Classic)





    Specialty V/I/W/Hz

    Voltage - VAC, VAVG, and VPK



    V/Hz and %RPL





    Current - IRMS, IDC, IAC, IAVG, and IPK



    Power (IEEE1459)





    Current Measurement

    AC current


    DC current





    Integrated current clamp





    AC current probes (mV/A input)



    AC flexible  current probe (directly)





    DC Current probe






    Energy studies

    Measure V, I, kW and Cosɸ/DPF

    Get detailed power and energy consumption profiles during energy audits and pinpoint savings opportunities






    Measure MIN/MAX and AVG values



    240 points per recording




    Detailed multi-day logging



    Harmonics study

    THD measurement (V & I)

    Discover the source of distortion in your installation, so that you can filter those loads or move them to separate circuits

    Harmonics 1 to 50 for V & I

    Power harmonics


    Basic industrial PQ troubleshooting

    Waveform display function (50/60Hz)

    When troubleshooting in the field, graphical data enables you to trace the source of the problem at hand

    Oscilloscope function (20MHz bandwidth)




    Voltage dips and swells



    Advanced Features

    Transient capture





    Discover peak current from load switching



    Event waveform capture

    Visualization of dips and swells to identify the cause of the events







    Fluke Connect App





    600 V/CAT IV



    600 V/CAT III





    Battery powered (non-rechargeable alkaline)





    Rechargeable battery powered



    Power from measurement line





    • NiMH Battery provides extended operating time of 6.5 hours
    • Combines the most useful capabilities of a power quality analyzer, multimeter and scope
    • Calculates 3-phase power on balanced loads, from a single-phase measurement
    • Trends voltage, current, frequency, power harmonics and captures voltage sags, transients and inrush current
    • Monitoring functions help track intermittent problems and power system performance
    • Records two selectable parameters for up to 16 days
    • 20 measurement memories to save/recall screens and data with cursor readings
    • FlukeView® software can log harmonics and all other readings over time and provides a complete harmonics profile up to the 51st harmonic
    • Measures resistance, diode voltage drop, continuity, and capacitance
    • Users/applications manual and power quality video to help answer tough questions
    • Complete package with voltage probes and 400 A current clamp, FlukeView Software and optically isolated interface cable
    • 3 year warranty on the Fluke 43B, 1 year on accessories



    • Voltage, current, and power harmonics
    • Up to 51st harmonic
    • Total harmonic distortion (THD)
    • Phase angle of individual harmonics


    • Watts, power factor, displacement power factor (cos Θ), VA and VAR
    • Voltage and current waveforms

    Three phase

    • On-screen graphics show you how to set up 3-phase power measurements

    Sags and swells

    • Measurements are always automatically recorded to instantly show changes over time
    • Use cursors to read time and date of sags and swells


    • Catch voltage transients and waveform distortion down to 40 nS
    • Catch and save up to 40 transients
    • Correlate the cause of transient with time and date stamps


    • Voltage and current waveforms
    • True RMS voltage and current
    • Frequency
  • Specifications
    Input characteristics Input impedance 1 MΩ, 20 pF
    Voltage rating 600 V rms, CAT III
    V/A/Hz display True-rms voltage
    (AC + DC)
    Ranges 5.000 V, 50.00 V, 500.0 V, 1250 V1
    Accuracy ±(1% + 10 counts)
    True-rms current
    (AC + DC)
    Ranges 50.00 A, 500.0 A, 5.000 kA, 50.00 kA, 1250 kA
    Accuracy ±(1% + 10 counts)
    Frequency Ranges 10.0 to 15.0 kHz
    Accuracy ± ([% of reading] + [counts]): 0.5% + 2
    CF crest factor Ranges 1.0 - 10.0
    Accuracy ±(5% + 1 count)
    Power display Watts, VA, VAR   1-phase and 3-phase,3 conductor balanced loads
    Ranges 250 W - 1.56 GW
    Accuracy ±(4% + 4 counts) Fundamental Power
    Accuracy ± (2% + 6 counts) Total Power
    PF power factor Range 0 - 1.0
    Accuracy ±0.04
    DPF displacement power factor, Cos .F Range 0.25 - 0.9
    Accuracy ±0.04
    Range 0.90 - 1.0
    Accuracy ±0.03
    H2 frequency fundamental Ranges 40.0 to 70.0 Hz
    Accuracy ± ([% of reading] + [counts]): 0.5% + 2
    Harmonics display Voltage, current, frequency Ranges Fundamental to 51st harmonic
    Accuracy VA ±(3% + 2 counts) W ±(5% + 2 counts)
    Fundamental 2 to 31st harmonic VA ±(5% +3 counts) W ±(10% +10 counts)
    32 to 51st harmonic VA ±(15% +5 counts) W ±(30% +5 counts)
    Frequency fundamental Ranges 40 Hz to 70 Hz
    Accuracy ±0.25 Hz
    Phase Range V, A (Between fundamental and harmonics)
    Accuracy ±3° to ±15°
    Range W (Between voltage fundamental and current harmonics)
    Accuracy ±5° to ±15°
    (Current and Power)
    Range 1.0 to 30.0
    Accuracy ±10%
    THD total harmonic distortion Range 0.00 - 99.99
    Accuracy ±(3% + 8 counts)
    Sags and swells Recording times 4 min to 16 days (selectable)
    Vrms actual, vrms max, min (AC + DC) Ranges 5.000 V, 50.00 V, 500.0 V, 1250 V1
    Accuracy Readings ±(2% +10 counts); Cursor readings ± (2% + 12 counts)
    Arms actual, arms max, min (AC + DC) Ranges 50.00 A, 500.0 A, 5.000 kA, 50.00 kA
    Accuracy ±(2% +10 counts)
    Transient capture Minimum pulse width 40 ns
    Useful bandwidth input 1 DC to 1 MHz
    Number of transients 40
    Voltage threshold settings 20%, 50%, 100%, 200% above or below reference
    Reference signal After START, the Vrms and frequency of the signal are measured. From these data a pure sinewave is calculated as reference for threshold setting.
    Vpeak min, vpeak max at cursor 10 V, 25 V, 50 V, 125 V, 250 V, 500 V, 1250 V Accuracy: ±5% of full scale
    R, C, diode, continuity Resistance ranges 500.0 Ω, 5.000 kΩ, 50.00 kΩ, 500.0 kΩ, 5.000 MΩ, 30.00 MΩ
    Resistance accuracy ±(0.6% + 5 counts)
    Capacitance ranges 50.00 nF, 500.0 nF, 5.000 µF, 50.00 µF, 500.0 µF
    Capacitance accuracy   ±(2% + 10 counts)
    Diode Ranges 0 to 3.000 V
    Diode voltage  
    Accuracy ±(2% + 5 counts)
    Continuity Beeper on at < 30 Ω ± 5 Ω
    Max current 0.5 mA
    Temperature °C or °F
    Inrush current Inrush times   1 s, 5 s, 10 s, 50 s, 100 s, 5 min
    Current ranges 1 A, 5 A, 10 A, 50 A, 100 A, 500 A, 1000 A
    Cursor readings A peak max at cursor 1 and cursor 2
    Accuracy ±5% of full scale
    Time between cursors 4 to 235 pixels (1 pixel = inrush time/250) Accuracy: ±(0.2% + 2 pixels)
    (with accessory)
      Range -100 °C - 400 °C
    Accuracy ±(0.5% + 5 counts)
    Scope display Measurements   DC, AC, AC + DC, peak, peak-peak, frequency, duty cycle, phase, pulse width, crest factor
    Time ranges 20 ns/div to 60 s/div
    Max sampling rate 25 MS/s
    Bandwidth Voltage channel [1] 20 MHz at inputs, 1 MHz with TL24 leads
    Current channel [2] DC to 15 kHz at inputs, 10 kHz with i400s current clamp
    Coupling AC, DC (10 Hz - 3 dB)
    Vertical sensitivity 5 mV/div to 500V/div
    Vertical resolution 8 bit (256 levels)
    Record length 512 samples per channel
    Base ranges 60 S/div to 20 nS/div ± (0.4% + 1 pixel)
    Timebase modes Normal, roll, single
    Pre-trigger Up to 10 divisions
    Trigger Source Input 1 or input 2 or automatic selection
    Trigger Mode Automatic Connect-and-View™, free Run, and single Shot
    Connect-and-view™ Advanced automatic triggering that recognizes signal patterns

    Automatically adjusts triggering, timebase and amplitude and displays stable pictures

    Memories 20 (screens, settings, data)
    Recording Recording times 4 min to 16 days (selectable)
    Parameters Choose one or two parameters from one of the groups below


    Power Watts, VA, VAR, PF, DPF, frequency

    Harmonics, THD, volts (Fund. and harmonic), ampères (F&H) watts(F&H)

    Frequency (H), %(H) of total, Phase(H), KF

    Resistance Resistance, diode, continuity, capacitance
    Scope DC voltage, DC current, AC voltage, AC current, frequency,

    Pulse width + or -, phase, duty cycle + or -, peak max, peak min, peak min-max, crest factor

    Environmental specifications Operating temperature 0°C to +50°C
    Safety specifications Electrical safety EN 61010-1 CAT III, 600V. CSA listed
    Mechanical and general specifications Size 232 x 115 x 50 mm
    Weight 1.1 kg
    Warranty 3 years
    Battery life Rechargeable NiMH pack (charger included), 6.5 hrs extended operating time (continuous)
    Shock and vibration Mil 28800E, Type 3, Class III, Style B
    Case IP51 (dust, drip, waterproof)
    1. Rated EN 61010-1 600 V CAT III CSA
    • Models
      Model Name Description  
      Fluke 43B Fluke 43B Single Phase Power Quality Analyzer


      • C120 Hard Case
      • TP1 Flat-tipped Slim-Reach™ Test Probes
      • TP4 4 mm Round Slim-Reach™ Test Probes
      • i400s AC Current Clamp
      • OC4USB Optically Isolated USB Interface Adapter
      • BP120MH Rechargeable NiMH Battery Pack (installed)
      • PM 8907 Line Voltage Adapter/Battery Charger
      • SW43W FlukeView™ Power Quality Analyzer Software and Users Manual on CD-ROM
      • Shielded Banana-to-BNC Adapter
      • Users Manual / Application Guide
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