AEMC DTR 8510 Digital Transformer RatiometerThe AEMC DTR 8510 Digital Transformer Ratiometer is a portable digital transformer ratiometer designed for on site testing of power, potential and current transformers. When connected to a non energized transformer, the AEMC DTR 8510 accurately measures primary to secondary turns ratio, while simultaneously displaying polarity and excitation current. The DTR is fully automatic and uses an ANSI IEEE compliant test method. No user calibration, range