HP-Agilent/Keysight 34401A

The Agilent 34401A multimeter is a tool kit of useful testing functions. In addition to the standard functions you´ve come to expect from a high quality digital multimeter, you also get many other capabilities, from min/max/avg to built-in limit testing. 6½ digit precision measurements for an affordable price means you can make measurements with confidence without breaking your budget. Features: 6½ digit resolution. 0.0035% 1 year dcV accuracy, 0.06% 1 year acV accuracy. Twelve measurement functions, plus limit testing and min/max/average. True RMS AC volts and current. 1000 readings/second in ASCII format across the GPIB bus. RS-232 and GPIB Standard, USB optional.
Datasheet