The Metravi PRO 27 is a 6000 counts backlit LCD display, Auto-Ranging T-RMS Multimeter with 61 Segment Analogue Bar-graph and is a best fit for all applications regarding electrical motors.This IP67 water and dust proof instrument can be used for Variable Frequency Drive ( VFD ) measurements and also measures Ghost Voltage (Lo-Z). One press of a button and you can toggle between Voltage-Frequency & Current-Frequency. Features Data Hold, Peak Hold and Relative Measurement facilities.Flexible Clamp can be attached for higher current measurements upto 3000A. (Optional accessory).It has Auto Power-Off to save battery life along with Low Battery indication as well. Confirms to CATIII 1000V and CATIV 600V.