Voltcraft at 400 digital multimeter 4000 counts cat iv 600v voltcraft at 400 p the voltcraft at 400 is a robust automotive digital multimeter with special measurement ranges for use in cars tests can be measured via an inductive tachometer with and without ignition distributors the at 400 can take a measurement of dwell angle for 4 5 6 and 8 cylinder engines p voltcraft at 400 automotive multimeter