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Fluke 435 Series II Power Quality and Energy Analyzer

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Fluke 435 Series II Power Quality and Energy Analyzer
Fluke 435 Series II
Fluke 435 Series II
Fluke 435 Series II
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

  Model Measurement range Resolution Accuracy
Vrms (ac+dc) 435-II 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 435-II 0.1 V ± 0.2% of nominal voltage
Vfund 435-II 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
Hz Fluke 435 @ 50 Hz nominal
42.500 Hz to 57.500 Hz
0.001 Hz

± 0.01 Hz
Fluke 435 @ 60 Hz nominal  51.000 Hz to 69.000 Hz
0.001 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 temperature -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

Model NameDescriptionPrice List
Fluke 435 II

Three-Phase Power Quality and Energy Analyzer

Included accessories:

  • 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
  • i430flex-TF, 24 inch (61 cm) length, 4 flexible current probes
  • 8 GB SD card
  • PowerLog on CD (includes operator manuals in PDF format)
  • USB cable A - Mini B
Price List
Fluke-438-II/MA430-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
Price List

The Basic models do not include current measuring probes, these must be ordered seperately

IEC 61000-4-30 Class-A Compliance



Measurement algorithms
Voltage accuracy 0.1% of Vnom 0.5% of Vnom
Time synchronization optional with GPS430 accessory

Cables and HardwarePrice List
GPS430GPS430 Time Synchronization ModulePrice List

ClipsPrice List
AC285AC285 SureGrip™ Alligator Clip SetPrice List

Batteries, Chargers and AdaptersPrice List
BP2902400 mAh Li-ion battery for Fluke 190 Series IIPrice List
BP2914800 mAh High capacity Li-ion battery ) for Fluke 190-seriesIIPrice List
BC430BC430 Line Voltage Adapter/Battery ChargerPrice List
EBC290EBC290 External Battery Charger, charges BP291 while outside instrumentPrice List

Current clampsPrice List
90i-610s90i-610s AC/DC Current Probe (600 A)Price List
i30sFluke i30s AC/DC Current ClampPrice List
i400si400s AC Current ClampPrice List
i5sPQ3i5sPQ3, 5 A ac Current Clamps, 3-packPrice List
i1000si1000s AC Current Clamp (1000 A)Price List
i3000si3000s AC Current ClampPrice List

OptionsPrice List
HH290Hanging Hook for ScopeMeter 190-Series IIPrice List

PC Adapter and SoftwarePrice List
FLK-FC-SD CARDFluke Connect Wireless SD CardPrice List

Test LeadsPrice List
TLS430TLS430 Test Leads and Alligator Clips setPrice List
WC100WC100 Color Localization SetPrice List
Related Products
 GPS430 Time Synchronization Module »
 Hanging Hook for ScopeMeter 190-Series II »
 i430 Flex 4 Pack »
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