• Automatically identifies device as an inductor or capacitor
  • Single button operation
  • Bright LED indicators and buzzer for L, C, open and short
  • Test probe with 5.75" (146mm) shaft
  • Multi-frequency source signals
  • Electrical specs:
    • Short; less than 20Ω
    • Open; greater than 20Ω
    • Transformer; less than 1mH
  • Microprocessor based design
  • Built-in self-test
  • Fuse protected


The AEMC 8505 Motor / Transformer Testers are hand-held instruments for performing quick, basic integrity tests on all transformers and capacitors used by electrical utilities. The Model 8505 verifies transformer winding continuity without requiring a full transformer ratio test. A single user can check a shipment of incoming transformers. Any units that have a defective coil can be quickly pinpointed and turned around for repair. The instrument provides simple, single-button operation whereby the user only needs to make the proper connections and push a button. Test results are clearly indicated by bright LEDs and (when applicable) a buzzer. The instrument includes captive cables with safety clips, a test probe, built-in fuse protection, and operates on four AA batteries.