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Fluke 435 Series II Basic Power Quality and Energy Analyzer

Advanced power quality functions and energy monetization capabilities mean there is no electrical issue the Fluke 435 Series II can’t handle.

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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. The Fluke 435 Series II Power Quality and Energy Analyzer is the world's only Power Quality analyzer that can monetize the cost of energy waste due to poor power quality. The wide range of measurement functions and measurement methods in the Fluke 435-II make it the ideal tool for both power quality troubleshooting and discovering energy savings Whether you’re checking the performance of motors and generators, trying to discover the source of an intermittent power problem or performing an energy study the Fluke 435-II will give you the data you need to quickly get to the heart of the problem.

    Wrapped in a lightweight, rugged package, the Fluke 435 II Energy Analyzer is the ideal portable power quality instrument providing advanced power quality functionality and energy analysis capabilities. If you require the same advanced functionality at a higher frequency, Fluke 437 II is the must-have power quality analyzer for 400 Hz power systems.


    • Frontline Troubleshooting – Quickly diagnose problems on-screen to get your operation back online.
    • Long-Term Analysis – Uncover hard-to-find or intermittent issues.
    • Load Studies – Verify the available electrical system capacity before adding loads
    • PowerWave Data Capture – Capture every waveform for up to 5 minutes along with fast RMS values so you can determine how the voltage, current and frequency values are interacting.
    • Power Inverter Efficiency – Measure the input and output power simultaneously to discover whether the inverter is optimized for its application.
    • Energy Monetization – Calculate the fiscal cost of energy waste due to poor power quality.
    • Energy Assessment –Quantify the before and after installation improvements in energy consumption to justify energy saving devices.
    • Predictive Maintenance – Periodic benchmarking of the power system can help detect and prevent power quality issues before they cause downtime.
    • Troubleshoot Real-Time: Analyze the trends using the cursors and zoom tools.
    • Automatic Trending: Every measurement is always automatically recorded, without any set-up.
    • Logger Function: Configure for any test condition with memory for up to 600 parameters at user defined intervals.
    • Measure All Three Phases and Neutral: With included four flexible current probes with enhanced thin flex design to fit into the tightest places.
    • PowerWave Data Capture: Capture fast RMS data, show half-cycle and waveforms to characterize electrical system dynamics (generator start-ups, UPS switching etc.).
    • Power Inverter Efficiency: Simultaneously measure AC output power and DC input power for power electronics systems using optional DC clamp.
    • Energy Loss Calculator: Classic active and reactive power measurements, unbalance and harmonic power, are quantified to pinpoint the fiscal costs of energy losses.
    • Highest Safety Rating in the Industry: 600 V CAT IV/1000 V CAT III rated for use at the service entrance.
    • System-Monitor: Ten power quality parameters on one screen according to EN50160 power quality standard.
    • View Graphs and Generate Reports: With included analysis software.
    • Battery Life: Seven hours operating time per charge on Li-ion battery pack.

    Powerful Troubleshooting Capabilities

    The Fluke 430-II products were specifically designed with the needs maintenance engineers and technicians in mind; 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 the state of the power quality of the system. Data can be quickly accessed as simple digital values, trend graphs, 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 problems experienced.

    AutoTrend - Quickly See the Trend
    Unique AutoTrend gives you 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. You can quickly view trends in voltage, current, frequency, power, harmonics or flicker on all three phases plus neutral.

    The System-Monitor Overview Screen
    Instant insight into whether the voltage, harmonics, flicker, frequency and the number of dips and swells fall outside the set limits. A detailed list is given of all events falling outside the set limits.

    PowerWave Data Capture
    For some users, load switching is a cause of power quality problems. When loads switch on, the current draw sometimes causes the voltage to drop to a level that causes other equipment to malfunction. The PowerWave function available in the 435 model enables users to capture voltage, current and frequency signals simultaneously at a high speed to see which interaction is potentially causing problems. PowerWave goes beyond standard power quality measurements; PowerWave's fast data capture mode enables system dynamics to be characterized.

    Waveforms for voltage and current are continuously captured for the specified time, and are displayed on screen in high detail; the power waveform is derived from the data. In addition, half-cycle RMS values for voltage, current, power and frequency can be stored and retrieved for analysis. This feature is particularly useful for testing of standby generation systems and UPS systems where reliable switch-on can be vital.

    Power Inverter Efficiency
    Power inverters take DC current and transform it into AC current, or vice versa. Solar generation systems usually include an inverter that takes the DC energy from the solar cells and converts it to useful AC power. Inverters can lose performance over time and need to be checked. By comparing the input power with the output power you can determine the system efficiency. The 430 series II can measure the efficiency of such inverters by simultaneously measuring the DC and AC power of a system to determine how much power is lost in the conversion process.

    Unified Power Measurement
    Previously, only experts could calculate how much energy was wasted due to power quality issues; utilities could calculate the cost, but the required measurement process was beyond the reach of average electricians. With this patented Unified Power function you can use one handheld tool to determine how much power is being wasted, and calculate exactly what the extra consumption costs.

    Fluke's patented Unified Power Measurement System provides the most comprehensive view of power available, measuring:

    • Parameters of Classical Power (Steinmetz 1897) and IEEE 1459-2000
    • Detailed Loss Analysis
    • Unbalance Analysis

    These UPM calculations are used to quantify the fiscal cost of energy loss caused by power quality issues. The calculations are computed, along with other facility-specific information by an Energy Loss Calculator that ultimately determines how much money a facility loses due to wasted energy.

    SystemMonitor - Check Performance Against EN50160 with Ease
    The unique System-Monitor gives you an overview of power system performance (there is no button or single function) and checks the compliance of incoming power to EN50160 limits or to your own custom specifications. The overview is shown on a single screen, with color-coded bars clearly indicating which parameters fall outside the limits.

    Logging function allows you to customize measurement selections and provides instantaneous analysis of user-selectable parameters.

    Measure and record power (W), VA and VARs, PF and energy consumption.

    Track harmonics up to the 50th, and measure and record THD in accordance with IEC61000-4-7 requirements

  • 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
    • 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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