Fluke 43B Single Phase Power Analyzer & Quality Analyzer

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  • Single Phase Power Analyzer | Fluke 43B Power Analyzer | Fluke
  • Single Phase Power Analyzer | Fluke 43B Power Analyzer | Fluke
  • Single Phase Power Analyzer | Fluke 43B Power Analyzer | Fluke

Key features

  • Single-Phase power quality analyzer for maintaining power systems, troubleshooting power problems, and diagnosing equipment failures
  • Combines the most useful capabilities of a power quality analyzer, multimeter, and scope
  • Features NiMH battery that provides extended operating time of 6.5 hours
  • Calculates 3-phase power on balanced loads, from a single-phase measurement
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Product overview: Fluke 43B Single Phase Power Analyzer & Quality Analyzer

Get control of power problems

The Fluke 43B has been the go-to industry leading single phase analyzer for over a decade in both industrial and classroom settings because of its intuitive ease of use and overall simplicity in performing just the right the measurements that you need to maintain power systems and troubleshoot power problems and diagnose equipment failures.

Other useful features:

  • Trends voltage, current, frequency, and power harmonics and captures voltage sags, transients, and inrush current
  • Provides monitoring functions to help track intermittent problems and power system performance
  • Records two selectable parameters for up to 16 days
  • Includes 20 measurement memories to save/recall screens and data with cursor readings
  • Includes FlukeView® software that logs harmonics and other readings over time and provides a complete harmonics profile up to the 51st harmonic
  • Measures resistance, diode voltage drop, continuity, and capacitance
  • Comes with a user/applications manual and power quality video to help answer tough questions
  • Includes voltage probes, 400 A current clamp, and optically isolated interface cable
  • Provides three year warranty on the Fluke 43B; One year on accessories

Specifications: Fluke 43B Single Phase Power Analyzer & Quality Analyzer

Input characteristicsInput impedance1 MΩ, 20 pF
Voltage rating600 V rms, CAT III
V/A/Hz displayTrue-rms voltage
(AC + DC)
Ranges5.000 V, 50.00 V, 500.0 V, 1250 V1
Accuracy±(1% + 10 counts)
True-rms current
(AC + DC)
Ranges50.00 A, 500.0 A, 5.000 kA, 50.00 kA, 1250 kA
Accuracy±(1% + 10 counts)
FrequencyRanges10.0 to 15.0 kHz
Accuracy± ([% of reading] + [counts]): 0.5% + 2
CF crest factorRanges1.0 - 10.0
Accuracy±(5% + 1 count)
Power displayWatts, VA, VAR1-phase and 3-phase,3 conductor balanced loads
Ranges250 W - 1.56 GW
Accuracy±(4% + 4 counts) Fundamental Power
Accuracy± (2% + 6 counts) Total Power
PF power factorRange0 - 1.0
DPF displacement power factor, Cos .FRange0.25 - 0.9
Range0.90 - 1.0
H2 frequency fundamentalRanges40.0 to 70.0 Hz
Accuracy± ([% of reading] + [counts]): 0.5% + 2
Harmonics displayVoltage, current, frequencyRangesFundamental to 51st harmonic
AccuracyVA ±(3% + 2 counts) W ±(5% + 2 counts)
Fundamental2 to 31st harmonicVA ±(5% +3 counts) W ±(10% +10 counts)
32 to 51st harmonicVA ±(15% +5 counts) W ±(30% +5 counts)
Frequency fundamentalRanges40 Hz to 70 Hz
Accuracy±0.25 Hz
PhaseRangeV, A (Between fundamental and harmonics)
Accuracy±3° to ±15°
RangeW (Between voltage fundamental and current harmonics)
Accuracy±5° to ±15°
(Current and Power)
Range1.0 to 30.0
THD total harmonic distortionRange0.00 - 99.99
Accuracy±(3% + 8 counts)
Sags and swellsRecording times4 min to 16 days (selectable)
Vrms actual, vrms max, min (AC + DC)Ranges5.000 V, 50.00 V, 500.0 V, 1250 V1
AccuracyReadings ±(2% +10 counts); Cursor readings ± (2% + 12 counts)
Arms actual, arms max, min (AC + DC)Ranges50.00 A, 500.0 A, 5.000 kA, 50.00 kA
Accuracy±(2% +10 counts)
Transient captureMinimum pulse width40 ns
Useful bandwidth input 1DC to 1 MHz
Number of transients40
Voltage threshold settings20%, 50%, 100%, 200% above or below reference
Reference signalAfter 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 cursor10 V, 25 V, 50 V, 125 V, 250 V, 500 V, 1250 V Accuracy: ±5% of full scale
R, C, diode, continuityResistance ranges500.0 Ω, 5.000 kΩ, 50.00 kΩ, 500.0 kΩ, 5.000 MΩ, 30.00 MΩ
Resistance accuracy±(0.6% + 5 counts)
Capacitance ranges50.00 nF, 500.0 nF, 5.000 µF, 50.00 µF, 500.0 µF
Capacitance accuracy±(2% + 10 counts)
Diode Ranges0 to 3.000 V
Diode voltage
Accuracy±(2% + 5 counts)
ContinuityBeeper on at < 30 Ω ± 5 Ω
Max current0.5 mA
Temperature°C or °F
Inrush currentInrush times1 s, 5 s, 10 s, 50 s, 100 s, 5 min
Current ranges1 A, 5 A, 10 A, 50 A, 100 A, 500 A, 1000 A
Cursor readingsA peak max at cursor 1 and cursor 2
Accuracy±5% of full scale
Time between cursors4 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 displayMeasurementsDC, AC, AC + DC, peak, peak-peak, frequency, duty cycle, phase, pulse width, crest factor
Time ranges20 ns/div to 60 s/div
Max sampling rate25 MS/s
BandwidthVoltage 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
CouplingAC, DC (10 Hz - 3 dB)
Vertical sensitivity5 mV/div to 500V/div
Vertical resolution8 bit (256 levels)
Record length512 samples per channel
Base ranges60 S/div to 20 nS/div ± (0.4% + 1 pixel)
Timebase modesNormal, roll, single
Pre-triggerUp to 10 divisions
Trigger SourceInput 1 or input 2 or automatic selection
Trigger ModeAutomatic 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

Memories20 (screens, settings, data)
RecordingRecording times4 min to 16 days (selectable)
ParametersChoose one or two parameters from one of the groups below


PowerWatts, 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

ResistanceResistance, diode, continuity, capacitance
ScopeDC 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 specificationsOperating temperature0°C to +50°C
Safety specificationsElectrical safetyEN 61010-1 CAT III, 600V. CSA listed
Mechanical and general specificationsSize232 x 115 x 50 mm
Weight1.1 kg
Warranty3 years
Battery lifeRechargeable NiMH pack (charger included), 6.5 hrs extended operating time (continuous)
Shock and vibrationMil 28800E, Type 3, Class III, Style B
CaseIP51 (dust, drip, waterproof)
1. Rated EN 61010-1 600 V CAT III CSA

Models: Fluke 43B Single Phase Power Analyzer & Quality Analyzer

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

Reviews: Fluke 43B Single Phase Power Analyzer & Quality Analyzer

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