The Pure BlackBox Three Phase is an advanced handheld power quality analyser equipped with PQZIP Technology, is an easy to use plug and play device that continuously records all power quality parameters without thresholds settings or recording configuration.  The analyzer continuously records voltage and current waveform sampled at a rate of 256 Sample/Cycle at 50/60Hz . Which provides information at a very high resolution, enabling to detect and analyze the slightest change without the need to set up triggers or thresholds.