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Fluke 43B Power Quality Analyzer

 Fluke 43B
Get control of power problems

The Fluke 43 Power Quality Analyzer performs the measurements you need to maintain power systems, troubleshoot power problems and diagnose equipment failures. All in a rugged handheld package.

  • 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
Input Characteristics
Input impedance  1 MΩ, 20 pF
Voltage rating  600V rms, CAT III
V/A/Hz Display
True-rms voltage (ac + dc)  
Ranges:  5.000 V, 50.00 V, 500.0 V, 1250 V*
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)
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
Fundamental:  VA ±(3% + 2 counts) W ±(5% + 2 counts)
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
Range:  V, A (between Fundamental & Harmonics)
Accuracy:  ±3º to ±15º
Range:  W (between Voltage Fundamental & Current Harmonics)
Accuracy:  ±5º to ±15º
K-factor (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:  5.000V, 50.00V, 500.0V, 1250V*
Accuracy:  Readings ±(2% +10 counts); Cursor readings ± (2% + 12 counts)
Arms Actual, Arms max, min (AC + DC)  
Ranges:  50.00A, 500.0A, 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)
Temperature (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
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
 20 (screens, settings, data)
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. & 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
 *Rated EN 61010-1 600 V CAT III CSA

Environmental Specifications
Operating Temperature
 0°C to +50°C

Safety Specifications
Electrical Safety
 EN 61010-1 CAT III, 600V. CSA listed

Mechanical & General Specifications
 232 x 115 x 50 mm
 1.1 kg
 3 years
Battery Life
 Rechargeable NiMH pack (charger included), 6.5 hrs extended operating time (continuous)
Shock & Vibration
 Mil 28800E, Type 3, Class III, Style B
 IP51 (dust, drip, waterproof)
Model NameDescriptionPrice List
Fluke 43B Fluke 43B includes:
  • 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
On Request

ClipsPrice List
AC220AC220 SureGrip™ Alligator Clip SetOn Request
AC285AC285 SureGrip™ Alligator Clip SetOn Request
TLK225Fluke TLK-225 SureGrip™ Master Accessory SetOn Request

Cables and HardwarePrice List
PAC91PAC91 Printer Adapter CableOn Request

Cases and HolstersPrice List
C120C120 Hard CaseOn Request
C125C125 Soft Meter Case On Request
C43C43 Soft Carrying CaseOn Request
C550C550 Tool BagOn Request

Current clampsPrice List
80i-110s80i-110s AC/DC Current Probe (100 A)On Request
i3000 Flex-4PKFluke i3000 Flex AC Current Clamp, 4 PackOn Request
i400si400s AC Current ClampOn Request
i1000si1000s AC Current Clamp (1000 A)On Request
i2000 flexi2000 flex AC Current ClampOn Request
i3000si3000s AC Current ClampOn Request
i3000s Flex-24i3000s Flex-24 AC Current Clamp, 610 mm (24 in.)On Request
i3000s Flex-36i3000s Flex-36 AC Current Clamp, 915 mm (36 in.)On Request
i6000sFlexi6000sFlex AC Current ProbeOn Request

LightsPrice List
L210L210 Probe Light + Probe ExtenderOn Request

Test Leads, Probes and ClipsPrice List
BB120BB120 Shielded Banana to Female BNC AdapterOn Request

TemperaturePrice List
80T-150UA80T-150U Universal Temperature Probe (for DMMs)On Request
80TK80TK Thermocouple Module (Type K)On Request

Test LeadsPrice List

SureGrip™ Industrial Test Lead Set includes:

  • AC220 SureGrip™ Alligator Clip Set
  • TP220 SureGrip™ Insulated Test Probe Set
  • TL224 SureGrip™ Silicone Test Lead Set (right to right)
  • One year warranty
On Request
TL223TL223 Electrical Test Lead SetOn Request
TL224TL224 SureGrip™ Insulated Test LeadsOn Request
TL71TL71 Premium Test Lead SetOn Request
TL27TL27 Heavy Duty Test Lead SetOn Request
TL221TL221 SureGrip™ Extension Lead SetOn Request
TL238TL238 SureGrip™ Test Lead Set for High Energy EnvironmentsOn Request
Related Products
 80T-150U Universal Temperature Probe (for DMMs) »
 TL238 SureGrip™ Test Lead Set for High Energy Environments »
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