The 34405A features simultaneous reading of DC and AC measurements with its dual display and can take up to 19 readings/sec at 4½ digit resolution through the standard USB interface. The 34405A comes with a broad range of measurement functions, including temperature and capacitance measurements.
The RS-232 port on the back panel can be used to connect to your PC. A USB to RS-232 interface adapter cable is included standard with the DMM4020 for connecting to your PC’s USB port.
DMM4020 Digital Multimeter - Tektronix
The limit compare mode provides pass/fail indicators to quickly show if a test passes or fails to help eliminate mistakes, especially for results that are close to the limit.
5.5 digit resolution Measure volts, ohms and amps with a basic V dc accuracy of 0.015%. Frequency measurements Save cost and bench space by replacing a multifunction DMM and counter with one instrument.
DC leakage current measurements Make sensitive low current measurements with 1 nA resolution. Dual display Measure two different parameters of the same signal from one test connection. PC Connectivity Easily connect to a personal computer using RS-232 or USB.