Fluke 437 II 400 Hz Power Quality Energy Analyzer

The Fluke 437 II is a high-performance 400 Hz power quality and energy analyzer designed for advanced electrical diagnostics, monitoring, and troubleshooting in demanding industrial, avionics, and power system environments. It captures detailed power quality measurements, identifies energy inefficiencies, and helps maintenance teams optimize electrical system performance with precision and reliability.

Professional Power Quality & Energy Analysis

Supports 400 Hz operation, meeting military and avionics power standards (MIL‑STD 1399).
Measures voltage, current, power, and power quality in real time for informed maintenance decisions.
Captures measurements for all three phases and neutral with flexible current probes.
Calculates energy costs associated with poor power quality, highlighting inefficiencies.
Detects the impact of motor startups and load changes on electrical performance.
Provides advanced power quality health data for quick assessment.

Advanced Diagnostic Capabilities

Energy Loss Calculator: Quantifies active and reactive power losses to pinpoint inefficiencies.
PowerWave Data Capture: Fast RMS waveform capture to characterize system dynamics, such as generator starts or UPS switching.
Long-Term & Load Studies: Records trends and evaluates system performance over extended periods.
Automatic Transient Capture: Records high-speed events without manual setup.
IEC 61000‑4‑30 Class-A Compliance: Ensures measurement accuracy and consistency with international power quality standards.

Built for Robust Field Use

High Safety Ratings: CAT IV 600 V / CAT III 1000 V for service entrance and distribution testing.
Integrated Protective Holster: Shock-proof construction with dust and water resistance (IP51).
Large Adjustable Display: Easy-to-read LCD with adjustable brightness and temperature compensation.
Memory & Storage: Supports SD card storage up to 32 GB for trends, event logs, and waveform captures.
Portable Power: Long battery operating time for extended field diagnostics.

Typical Use Cases

Electrical maintenance teams verifying power system integrity
Engineers performing load studies and energy efficiency assessments
Technicians troubleshooting intermittent faults or electrical transients
Facilities performing MIL‑STD-compliant power testing in avionics or military systems

Technical Specifications

Voltage & Frequency

Voltage (Vrms ac+dc): 1 V to 1000 V (phase to neutral), resolution 0.01 V, accuracy ± 0.1 %
Peak Voltage (Vpk): 1 Vpk to 1400 Vpk, resolution 1 V, accuracy ± 5 %
Voltage Crest Factor (CF): 1.0 > 2.8, resolution 0.01, accuracy ± 5 %
Operating Frequency Range:
- 50 Hz range: 42.5 – 57.5 Hz, ± 0.01 Hz
- 60 Hz range: 51 – 69 Hz, ± 0.01 Hz
- 400 Hz range: 340 – 460 Hz, ± 0.1 Hz

Current & Power Measurements

Current (ac+dc):
- i430‑Flex 1×: 5 A – 6000 A, resolution 1 A, accuracy ± 0.5 % ± 5 counts
- i430‑Flex 10×: 0.5 A – 600 A, resolution 0.1 A, accuracy ± 0.5 % ± 5 counts
- 1 mV/A 1×: 5 A – 2000 A, resolution 1 A, accuracy ± 0.5 % ± 5 counts
- 1 mV/A 10×: 0.5 A – 200 A (ac only), resolution 0.1 A, accuracy ± 0.5 % ± 5 counts
Peak Current (A pk): Up to 8400 A (i430‑Flex), up to 5500 A (1 mV/A), resolution 1 A, accuracy ± 5 %
Power (W, VA, var): Up to 6000 MW (i430‑Flex) or up to 2000 MW (1 mV/A), resolution 0.1 W to 1 MW, accuracy ± 1 % ± 10 counts
Power Factor (Cos φ / DPF): 0 – 1, resolution 0.001, accuracy ± 0.1 % @ nominal load

Energy & Loss Analysis

Energy (kWh, kVAh, kvarh): Accuracy ± 1 % ± 10 counts
Energy Loss Calculator: Quantifies active and reactive power losses to identify inefficiencies

Unbalance & Signaling

Voltage Unbalance: 0 – 20 %, resolution 0.1 %, accuracy ± 0.1 %
Current Unbalance: 0 – 20 %, resolution 0.1 %, accuracy ± 1 %
Mains Signaling: Adjustable thresholds and durations for signaling frequencies 60 Hz–3000 Hz
Relative Voltage (%): 0 – 100 %, resolution 0.1 %, accuracy ± 0.4 %

Display & Interface

Display: 153 mm diagonal LCD, 320 × 240 pixels, adjustable brightness
Memory & Storage: SD card (8–32 GB) for trends, event logs, and waveform captures
Ports: Mini‑USB‑B and isolated USB for PC connectivity

Safety & Environmental

Safety Ratings: CAT IV 600 V / CAT III 1000 V
Case & Protection: Rugged, shock-proof, IP51 dust/water resistance
Operating Temp: 0 °C – 40 °C (battery operation); 40 °C – 50 °C without battery
Storage Temp: –20 °C – 60 °C
Humidity: Up to 95 % RH non-condensing (+10 °C–+30 °C); up to 75 % RH (+30 °C–+40 °C); up to 45 % RH (+40 °C–+50 °C)
Altitude: Up to 2000 m @ CAT IV 600 V / CAT III 1000 V; up to 3000 m @ CAT III 600 V / CAT II 1000 V

Compliance & Standards

Fluke 437 II

Buy Fluke 437 II 400 Hz

Buy Fluke 437 II 400 Hz