The quality of power supplied to your system is very important for its performance.
The most common voltage disturbances are as follows:
- Harmonic distortion: A high-frequency disturbance that appears as distortion of the fundamental sine wave, and that might affect the operation of your system.
- Slow average: A gradual, long-term change in the average root mean square (RMS) voltage level, with typical durations greater than 2 s.
- Sags and surges: Sudden changes in the average RMS voltage level, with typical durations between 50 ms and 2 s.
- Transients (or impulses): Brief voltage excursions of up to several thousand volts, with durations of less than 50 ms.
The instrument is tested in accordance with EN 61326. However, excessive distortion, slow average disturbances, transients, as well as sags and surges on the power line can affect the quality of the measurement. Non-standard power fluctuations and excessive noise on the power lines degrade electronic components over time, which reduces their life span. Use power monitoring and conditioning devices to ensure stable performance of the instrument.