Extech ma1500 current clamp 40000 4000 counts cat iv 600v extech ma1500 the extech ma1500 is a true rms clamp meter the meter will measure ac current dc current ac dc voltage resistance capacitance frequency diode test duty cycle and continuity the moulded case is designed for heavy duty use making it ideal on site this meter is shipped fully tested and calibrated and with proper use will provide years of reliable service p extech ma1500 current clamp 40000 4000 counts cat iv 6