Using a rotation tester when installing a motor saves time and prevents problems such as driving the load backward. In some cases, you must get the motor rotation correct or massive damage will occur.

At one end, the handheld EPM3 phase-sequence and motor-rotation tester can check three-phase, 100 to 600-Vac, 45 to 70-Hz inputs for open phase and phase sequence. At its other end, the meter uses an ...