Fluke 435-II Power Quality and Energy Analyzer

The Fluke 435-II Power Quality and Energy Analyzer stands as a powerful tool for professionals in the electrical industry. Its advanced features, ranging from comprehensive power analysis to energy loss calculations, make it an indispensable asset for organizations striving to optimize energy efficiency, reduce costs, and ensure the reliability of their electrical systems. As technology continues to advance, instruments like the Fluke 435-II play a crucial role in maintaining the health and performance of modern power networks.

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Fluke 435-II Power Quality and Energy Analyzer

The Fluke 435-II Power Quality and Energy Analyzer stands as a pinnacle in the realm of electrical testing and analysis. Engineered by Fluke, a trusted name in the field of test and measurement equipment, the 435-II is a sophisticated instrument designed to analyze power quality issues, calculate energy costs, and prevent downtime. In this article, we will delve into the key features, applications, and advantages of the Fluke 435-II, highlighting its significance in the field of power quality analysis.

Fluke 435-2 Key Features

Comprehensive Power Analysis

The Fluke 435-II offers comprehensive power analysis capabilities, allowing professionals to delve deep into the intricacies of electrical systems. With the ability to measure voltage, current, power, harmonics, and more, this analyzer provides a holistic view of the power quality landscape.

Energy Loss Calculator

A standout feature is the energy loss calculator, which enables users to pinpoint true system energy losses in dollars. This functionality empowers organizations to identify inefficiencies and implement measures to optimize energy consumption, ultimately reducing costs.

Power Inverter Efficiency

The Fluke 435-II includes a power inverter efficiency measurement feature. This allows simultaneous measurement of AC output power and inverter efficiency, providing valuable insights into the performance of power inverters in renewable energy systems.


The Fluke 435-II finds applications in a wide array of industries where precise power quality analysis is essential. From manufacturing plants to commercial facilities and renewable energy installations, this analyzer helps locate, predict, prevent, and troubleshoot power quality problems in both three-phase and single-phase power systems.


Preventive Maintenance

By enabling professionals to analyze power quality in real-time, the Fluke 435-II facilitates preventive maintenance. Identifying issues before they escalate reduces downtime, minimizes equipment damage, and contributes to the overall reliability of electrical systems.

Enhanced Troubleshooting

Troubleshooting power quality issues is streamlined with the Fluke 435-II’s advanced capabilities. Its ability to capture waveform data and event logs provides valuable data for diagnosing and addressing electrical anomalies effectively.

Fluke 435-II Power Quality and Energy Analyzer Specifications:

  • 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%
  • Current: Depends on probe
  • Hz: Depends on probe
  • Power Factor (Cos j/DPF): 0 to 1, 0.001, ±0.1% @ nominal load conditions
  • 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
  • Plt, Pst, Pst (1 min) Pinst: 0.00 to 20.00, 0.01, ±5%
  • 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
  • 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 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), up to 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
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Since its founding in 1948, Fluke has helped define and grow a unique technology market, providing testing and troubleshooting capabilities that have grown to mission critical status in manufacturing and service industries. Every new manufacturing plant, office, hospital, or facility built today represents another potential customer for Fluke products. From industrial electronic installation, maintenance and service, to precision measurement and quality control, Fluke tools help keep business and industry around the globe up and running. Typical customers and users include technicians, engineers, metrologists, medical-device manufacturers, and computer network professionals — people who stake their reputations on their tools, and use tools to help extend their personal power and abilities.
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