Energized Electrical Signature Analysis (ESA) Testing Instrument Test your motor quickly and easily with the most complete energized motor and power diagnostic instrument, all in a handheld, lightweight package. The ALL-TEST PRO On-Line II™ electrical signature analysis tool delivers superior AC diagnostics for the evaluation of your motor health, including electrical and mechanical rotor health, stator health, air gap, and the entire driven load, whether geared, bladed, or belted. This power quality and electric motor analyzer is the most complete electrical signature and power analysis instrument for AC/DC motors, generators, and transformers. The ATPOL II™ software analyzes and reports on the electrical and mechanical conditions of the entire motor or generator system. Track results easily with smart, automatic diagnostic tools for AC/DC motors, generators and transformers.