Digital Multimeter The 3438A Digital Multimeter is a quality-built autoranging meter with 5 functions of AC and DC Voltage, AC and DC Current, and Resistance. It interfaces to the HP-IB providing both addressable and talk-only modes. Basic DC voltage accuracy of ?0.1%. Polarity is automatically sensed and displayed. Provides autoranging and HP-IB output format. Five function DVM with 3 1/2-digit display