Accredited Power Analyzer Calibration Services
A power analyzer is one of the most sophisticated tools in an electrical engineer’s arsenal, capable of measuring complex waveforms and energy efficiency across multiple phases. At DRS Technologies, we provide expert power analyzer calibration services to ensure your device provides precise data for R&D, compliance testing, and energy audits. Our laboratory verifies every measurement channel to ensure your calculations for Real, Reactive, and Apparent power remain within strict manufacturer tolerances.
Why Synchronization and Harmonic Accuracy Matter
Unlike a standard multimeter, a power analyzer must synchronize voltage and current measurements with microsecond precision to calculate the Power Factor ($PF$) and Harmonic content accurately. Over time, internal clock drift or component aging can lead to phase errors, which drastically impact efficiency calculations. Regular calibration by DRS Technologies ensures your device meets global standards like IEC 61000-3-2 for harmonic testing and IEEE 519 for power quality.
Our Technical Power Analyzer Calibration Process
Our metrology experts employ high-stability 3-phase power calibrators to perform a comprehensive system audit:
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Voltage and Current Magnitude Verification: We verify the accuracy of each input channel across multiple ranges, ensuring linearity from millivolts to high-voltage and milliamps to high-current.
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Phase Angle and Timing Accuracy: We measure the phase shift between channels to ensure the analyzer correctly calculates $cos(\phi)$. Even a $0.1^{\circ}$ error can result in significant power measurement inaccuracies.
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Harmonic and THD Verification: We source distorted waveforms with known harmonic content (up to the 50th harmonic or higher) to verify the analyzer’s Fast Fourier Transform (FFT) accuracy.
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Energy (Wh) and Demand Testing: We verify the internal integration functions to ensure that energy consumption over time is recorded accurately for utility and efficiency studies.
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NIST Traceable Certification: Every unit is returned with a comprehensive certificate including “As-Found” and “As-Left” data, specific harmonic accuracy results, and documented NIST traceability.
Specialized Expertise for Advanced Power Measurement
DRS Technologies provides elite-level support for a wide array of power analyzers, including:
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High-Precision Benchtop Analyzers: Support for Yokogawa WT series, Hioki PW series, and Fluke Norma.
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Portable Power Quality Analyzers (PQA): Verification for Fluke 435, Dranetz, and Chauvin Arnoux models.
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1-Phase and 3-Phase Systems: Complete multi-channel verification for Delta and Wye configurations.
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Variable Frequency Drive (VFD) Analyzers: Testing accuracy at non-standard frequencies (e.g., 10Hz to 1kHz).
Frequently Asked Questions Regarding Power Analyzer Calibration
What is the difference between “Fundamental” and “Total” Power?
The fundamental power is the measurement at the primary frequency (e.g., 60Hz), while total power includes the effects of all harmonics. During calibration, DRS Technologies verifies that your analyzer correctly distinguishes between these values, which is critical for identifying efficiency losses caused by non-linear loads.
How often should a power analyzer be calibrated?
Due to the complexity of the internal sampling electronics, a twelve-month calibration interval is the industry standard. For units used in regulatory compliance testing (such as Energy Star or CE marking), annual calibration is mandatory to maintain the validity of your test reports.
Do I need to calibrate my current clamps with the analyzer?
Yes. For the highest level of system accuracy, we recommend calibrating your current probes or CTs (Current Transformers) alongside the analyzer as a matched set. This allows us to account for any phase shift or scaling errors introduced by the probes themselves.