MWRM-3 (Digital Heat Loss Meter) Designed to test winding resistance of motors/generators during Cold & Heat Run Test Fast , stable & accurate readings within few seconds during Heat Run test. 4 wire Resistance measurement technique to eliminates Test lead resistance errors. Single compact unit direct reading instruments. Six measurement ranges from 20 mOhm to 2000 Ohms. High Resolution of 10 microOhms. Large display for ease of visibility. CE and CAT II certified.