There are five vital measurements that could be causing problems in your electrical distribution system that you may be missing even with a True-rms digital multimeter. While the digital multimeter is a valuable and indispensable tool for the electrical professional, it does have limitations. A multimeter may be able to alert you to one of these five issues, but be prepared to use a power quality analyzer to dig in further and uncover these hidden potential problems.Those measurements are:1. Harmonic...

Symptoms of power quality issues include vibration, excessive buzzing or humming and overheating. Technicians should occasionally check the power of transformers that supply nonlinear loads, such as variable frequency drives (VFDs) or switching power supplies. Doing so ensures operation within acceptable limits. Transformers are deeply critical to the reliability of the grounding system. During your transformer inspection, use temperature as a guide to check for excessive radiant heat and stay alert...