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Fluke 435 Series II Basic Power Quality and Energy Analyzer

Be prepared for power quality issues with the Fluke 435 II. Take measurements and download via Wi-Fi or USB so you can get answers fast.

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  • Advanced Power Quality Functions, Unprecedented Energy Analysis Capabilities

    Power quality issues can affect the operation of critical loads and have a negative impact on your bottom line. Think of the Fluke 435-II Power Quality and Energy Analyzer as your insurance policy. Calculate the cost of wasted energy due to poor power quality and troubleshoot the source of power quality or motor performance issues all with a single test tool designed to give you the data you need to quickly get to the root of the problem.

    Wrapped in a lightweight, rugged package, the Fluke 435-II Energy Analyzer is the ideal portable power quality instrument.

    • Quickly see how much money you’re losing due to energy waste in terms of real dollars
    • Easily see how motor startups are affecting motor drive performance
    • Get at-a-glance power quality health data in real-time so you can make better maintenance decisions
    • Capture every measurement automatically without any set-up so you don’t have to worry about not having the right data
    • Measure all three phases and neutral with the included flexible current probes
    • Highest safety rating in the industry: 600 V CAT IV/1000 V CAT III rated for use at the service entrance
    • Fluke Connect® compatible* – view data locally on the instrument, via Fluke Connect mobile app and PowerLog 430-II desktop software

    If you require this same advanced functionality at a higher frequency, Fluke 437 II is the must-have power quality analyzer for 400 Hz power systems.

  • The Fluke 435-II products are designed for users who need to get to the solution of the power quality problem as quickly as possible so that they can minimize expensive downtime. The measurement process and display of data is optimized to get to the most important information as quickly as possible. Multiple parameters are measured simultaneously and displayed in formats that quickly describe overall power quality health while giving you the detailed information you need to make better maintenance decisions. Data can be quickly accessed as simple digital values, trend graphs that give you fast insight into changes over time, waveforms, phasor diagrams or analyzed and organized into tabular format such as the event data where the magnitude, duration and time stamping enable rapid correlation to the problems you are experiencing in your facility.

    Energy loss Calculator—Calculate money lost to energy waste in terms of real dollars
    It’s a simple fact, poor power quality can have a big impact on the bottom line. The Fluke 435-II enables you to identify issues and measure energy loss giving you specific insight into the amount of loss in dollars associated things like effective power and with poor power quality characteristics such as reactive power, unbalance, distortion, or neutral current. The 435-II even offers users the flexibility to input cable length and cable diameter so you can calculate loss due to conductor sizing (Or use AUTO mode if you don’t know your cable specification) and enter up to four unique time-dependent daily rates (kWh) for more accurate calculations. Armed with this critical data users can easily justify the investment necessary to take countermeasures.

    PowerWave Data Capture—Quickly identify how motor and generator startups are impacting equipment performance
    With PowerWave data capture you can capture three-phase high resolution voltage and current waveforms for up to five minutes along with detailed RMS voltage and current values. By analyzing the interaction of these values over time you can correlate the effects of voltage, current and frequency during the critical startup of motors and generators. PowerWave even goes beyond the standard power quality measurements allowing you to record half cycle rms values on 8 channels, frequency and instantaneous power (Vrms1/2, Arms1/2, W, Hz and scope waveforms for voltage, amps and watts).

    Advanced Power Quality Health—At-a-glance power quality health data in real-time so you have the data you need, when you need it
    The Fluke 430-II utilizes an integrated Power Quality Health summary that gives you an at-a-glance view of a complete range of power quality issues in real time. With a simple graphical presentation, complete with tolerance limits, you can quickly discover which power quality problems may be present on your electrical system. If you don’t know where to start or what problems might exist the advanced Power Quality Health summary will simplify the task.

    Power Inverter Efficiency
    Power inverters take DC current and transform it into AC current, or vice versa. But, what percentage of that power going into the inverter comes out as usable current? Nothing is ever 100% efficient, and the efficiency will vary depending on how much power is being used at the time (with the efficiency generally being greater when more power is being used). Inverters can also lose performance over time and need to be checked. By comparing the input power with the output power you can determine the system efficiency. With the Power Inverter Efficiency feature you can discover just how good is your inverter at converting your DC power to AC (or vice versa).

    AutoTrend – Quickly See the Trend
    With a unique AutoTrend feature you can get fast insight into changes over time. Every displayed reading is automatically and continuously recorded without having to set up threshold levels or having to manually start the process So you can quickly view trends in voltage, current, frequency, power, harmonics or flicker on all three phases plus neutral.

  • Product Specifications
    Volt Model Measurement Range Resolution Accuracy
    Vrms (ac+dc) 1 V to 1000 V phase to neutral 0.01 V ± 0.1% of nominal voltage**** 
    Vpk 1 Vpk to 1400 Vpk 1 V 5% of nominal voltage
    Voltage Crest Factor (CF) 1.0 > 2.8 0.01 ± 5%
    Vrms½   0.1 V ± 0.2% of nominal voltage
    Vfund   0.1 V ± 0.1% of nominal voltage
    Amps (accuracy excluding clamp accuracy)
    Amps (ac+dc) i430-Flex 1x  5 A to 6000 A 1 A ± 0.5% ± 5 counts
    i430-Flex 10x 0.5 A to 600 A 0.1 A ± 0.5% ± 5 counts
    1mV/A 1x 5 A to 2000 A 1A ± 0.5% ± 5 counts
    1mV/A 10x 0.5 A A to 200 A (ac only) 0.1 A ± 0.5% ± 5 counts
    Apk i430-Flex  8400 Apk  1 Arms ± 5%
    1mV/A 5500 Apk 1 Arms ± 5%
    A Crest Factor (CF) 1 to 10 0.01 ± 5%
    Amps½ i430-Flex 1x  5 A to 6000 A  1 A  ± 1% ± 10 counts 
    i430-Flex 10x 0.5 A to 600 A 0.1 A  ± 1% ± 10 counts
    1mV/A 1x   5 A to 2000 A  1A  ± 1% ± 10 counts
    1mV/A 10x 0.5 A A to 200 A (ac only) 0.1 A ± 1% ± 10 counts
    Afund i430-Flex 1x  5 A to 6000 A 1 A ± 0.5% ± 5 counts 
    i430-Flex 10x  0.5 A to 600 A 0.1 A ± 0.5% ± 5 counts
    1mV/A 1x  5 A to 2000 A 1A ± 0.5% ± 5 counts
    1mV/A 10x  0.5 A A to 200 A (ac only) 0.1 A ± 0.5% ± 5 counts
    Fluke 434 @ 50 Hz Nominal 42.50 Hz to 57.50 Hz 0.01 Hz
    ± 0.01 Hz
    Fluke 434 @ 60 Hz Nominal 51.00 Hz to 69.00 Hz 0.01 Hz ± 0.01 Hz
    Watts (VA, var) i430-Flex 
    max 6000 MW 0.1 W to 1 MW ± 1% ± 10 counts
    1 mV/A max 2000 MW 0.1 W to 1 MW ± 1% ± 10 counts
    Power Factor (Cos j/DPF) 0 to 1 0.001 ± 0.1% @ nominal load conditions
    kWh (kVAh, kvarh) i430-Flex 10x Depends on clamp scaling and V nominal ± 1% ± 10 counts
    Energy Loss i430-Flex 10x Depends on clamp scaling and V nominal ± 1% ± 10 counts Excluding line resistance accuracy
    Harmonic Order (n) DC, 1 to 50 Grouping: Harmonic groups according to IEC 61000-4-7
    Inter-Harmonic Order (n) OFF, 1 to 50 Grouping: Harmonic and Interharmonic subgroups according to IEC 61000-4-7
    Volts % f 0.0% to 100% 0.1% ± 0.1% ± n x 0.1%
    r 0.0% to 100% 0.1% ± 0.1% ± n x 0.4%
    Absolute 0.0 to 1000 V 0.1 V ± 5% *
    THD 0.0% to 100% 0.1% ± 2.5%
    Amps % f 0.0% to 100% 0.1% ± 0.1% ± n x 0.1%
    r 0.0% to 100% 0.1% ± 0.1% ± n x 0.4%
    Absolute 0.0 to 600 A 0.1 A ± 5% ± 5 counts
    THD 0.0% to 100% 0.1% ± 2.5%
    Watts % f or r  0.0% to 100% 0.1% ± n x 2%
    Absolute Depends on clamp scaling and V nominal  ± 5% ± n x 2% ± 10 counts
    THD 0.0% to 100%   0.1% ± 5%
    Phase Angle -360° to +0° ± n x 1°
    Plt, Pst, Pst(1min) Pinst 0.00 to 20.00 0.01 ± 5%
    Volts % 0.0% to 20.0% 0.1% ± 0.1%
    Amps % 0.0% to 20.0% 0.1% ± 1%
    Mains Signaling
    Threshold Levels Threshold, limits and signaling duration is programable for two signaling frequencies
    Signaling Frequency 60 Hz to 3000 Hz 0.1 Hz  
    Relative V% 0% to 100% 0.10% ± 0.4%
    Absolute V3s (3 second avg.) 0.0 V to 1000 V 0.1 V ± 5% of nominal voltage
    General Specifications
    Case Design Rugged, shock proof with integrated protective holster Drip and dust proof IP51 according to IEC60529 when used in tilt stand position Shock and vibration Shock 30 g, vibration: 3 g sinusoid, random 0.03 g 2 /Hz according to MIL-PRF-28800F Class 2
    Display Brightness: 200 cd/m 2 typ. using power adapter, 90 cd/m 2 typical using battery power Size: 127 mm x 88 mm (153 mm/6.0 in diagonal) LCD Resolution: 320 x 240 pixels Contrast and brightness: user-adjustable, temperature compensated
    Memory 8GB SD card (SDHC compliant, FAT32 formatted) standard, upto 32GB optionally Screen save and multiple data memories for storing data including recordings (dependent on memory size)
    Real-Time Clock Time and date stamp for Trend mode, Transient display, System Monitor and event capture
    Operating Temperature 0°C ~ +40°C; +40°C ~ +50°C excl. battery
    Storage Ttemperature -20°C ~ +60°C
    Humidity +10°C ~ +30°C: 95% RH non-condensing
    +30°C ~ +40°C: 75% RH non-condensing
    +40°C ~ +50°C: 45% RH non-condensing
    Maximum Operating Altitude Up to 2,000 m (6666 ft) for CAT IV 600 V, CAT III 1000 V
    Up to 3,000 m (10,000 ft) for CAT III 600 V, CAT II 1000 V
    Maximum storage altitude 12 km (40,000 ft)
    Electro-Magnetic-Compatibility (EMC) EN 61326 (2005-12) for emission and immunity
    Interfaces Mini-USB-B, Isolated USB port for PC connectivity SD card slot accessible behind instrument battery
    Warranty Three years (parts and labor) on main instrument, one year on accessories
    View full family specifications »
    *  ± 5% if ≥ 1% of nominal voltage ± 0.05% of nominal voltage if < 1% of nominal voltage
    **  50Hz/60Hz nominal frequency according to IEC 61000-4-30
    ***  400Hz measurements are not supported for Flicker, Mains Signaling and Monitor Mode
    **** For nominal voltage 50 V to 500 V
    • Models
      Model Name Description  
      Fluke 435 Series II Basic Fluke 435 Series II Basic Power Quality and Energy Analyzer


      • BC430 Power Adapter
      • International Plug Adapter Set
      • BP290 (Single Capacity Li-ion Battery) 28 Wh (8 hours or more)
      • TLS430 Test Lead and Alligator Clip Set
      • WC100 Color Coding Clips and Regional Decals
      • 8 GB SD Card
      • PowerLog on CD (includes operator manuals in PDF format)
      • USB Cable A - Mini B
      Fluke-430-II/MA Fluke 430-II motor analyzer upgrade kit


      • Firmware upgrade package to add motor analysis capabilties to existing Fluke 434, 435 and 437 Series II Power Quality Analyzers
    • Batteries, Chargers & Adapters
      Model Name Description  
      Fluke BC430 Fluke BC430 Line Voltage Adapter/Battery Charger Fluke Store
      Fluke BP291 Fluke BP291 4800 mAh High Capacity Li-Ion Battery for Fluke 190-Series-II
      Fluke EBC290 Fluke EBC290 External Battery Charger for BP290 and BP291 Fluke Store
    • Cases & Holsters
      Model Name Description  
      Fluke C435 Fluke C435 Hard Rolling Case
    • Clips
      Model Name Description  
      Fluke AC285 Fluke AC285 SureGripTM Alligator Clips Fluke Store
    • Current Clamps
      Model Name Description  
      Fluke i30s Fluke i30s AC/DC Current Clamp Fluke Store
      Fluke-i310s Fluke i310s Current Probe Fluke Store
      Fluke i400s Fluke i400s AC Current Clamp Fluke Store
      Fluke i430 Fluke i430 Flex 4 Pack Fluke Store
      Fluke i5S Fluke i5S AC Current Clamp Fluke Store
      Fluke i5sPQ3 Fluke i5sPQ3, 5 A AC Current Clamps, 3-pack Fluke Store
      Fluke-i6000s Flex Fluke i6000sFlex AC Current Probe
    • Options
      Model Name Description  
      Fluke HH290 Fluke HH290 Hanging Hook for ScopeMeter 190-Series II
    • Test Leads
      Model Name Description  
      Fluke TLS430 Fluke TLS430 – Test Leads and Alligator Clips (4 black, 1 green) Fluke Store
    • Test Leads, Probes & Clips
      Model Name Description  
      Fluke WC100 Fluke WC100 Color Localization Set Fluke Store
    • Wireless Accessories
      Model Name Description  
      FLK-FC-SD CARD Fluke Connect Wireless SD Card
    • Related Products
      Model Name Description  
      Fluke 437 Series II 400 Hz Basic Fluke 437 Series II 400 Hz Basic Power Quality and Energy Analyzer
      Fluke 437 Series II 400Hz Fluke 437 Series II 400 Hz Power Quality and Energy Analyzer
      Fluke 435 Series II Fluke 435 Series II Power Quality and Energy Analyzer
      Fluke 434 II Basic Fluke 434 Series II Basic Energy Analyzer
      Fluke 434 Series II Fluke 434 Series II Energy Analyzer
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