The value depends on the model of the power analyzer.

- For WT1000, WT2000, WT100, and WT200, it is fixed to the fundamental wave. For power analyzers with 7 segments LED, the relative harmonic content is fixed to the fundamental wave.

Relative harmonic content=（each harmonics x 100)/Fundamental Wave[%] - For WT1600, WT3000, and WT500, it is selectable.

1. When the denominator of the computing equation for distortion is a total value (Total),

Relative harmonic content = (each harmonics x 100)/Total Waves[%]

2. When the denominator of the computing equation for distortion is the fundamental wave (Fundamental),

Relative harmonic content = (each harmonics x 100)/Fundamental Wave[%]

- Power and Harmonic (THD) Measurements with Independent Range Controls
- Efficiency measurements of AC/DC or DC/AC Inverters & Motors

With 0.02% accuracy and 1MHz bandwidth, the WT3000 delivers where the highest precision measurements are required. It is the industry standard for R&D work on inverters, motor drives, lighting systems and electronic ballasts, UPS systems, aircraft power, transformer testing, and other power conversion devices.

The High-end WT1600 is designed for a wide range of applications, from energy-saving to large load applications. The WT1600 has a six element input capability to provide maximum flexibility, and Basic Power Accuracy of 0.1% with 1 MHz Bandwidth.

The WT2000 digital powermeter series has been designed with emphasis on basic performance (bandwidth, accuracy, response speed, and noise immunity) from the viewpoint of measurement of electrical quantities. The broad range of functions of these power analyzers enable them to be used in various fields of applications.

Measure characteristics of devices that generate, transform or consume electricity. Also called power meters or wattmeters, these devices measure parameters such as true power (watts), power factor, harmonics, and efficiency.

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