Periodic resistance testing of electrical windings can detect deterioration or contamination in the insulation which will shorten winding life. This testing is recommended to prevent major failures and to determine when corrective action should be taken. The Phenix Technologies PM15-4A Insulation Analyzer provides up to 15 kVDC and performs all necessary calculations to accurately determine the results. Test results can be viewed on the VFD (Vacuum Fluorescent Display) or printed out via the built-in printer. The system is equipped with a USB communications port and an SD card for non-volatile storage of test results.