The Keysight 34461A 6½ digit, Performance Truevolt DMMs offer higher levels of accuracy, speed and resolution. Truevolt DMM's graphical capabilities such as trend and histogram charts offer more insights quickly. The model also provides a data logging mode for easier trend analysis and a digitizing mode for capturing transients. The additional feature of auto calibration allows you to compensate for temperature drift so you can maintain measurement accuracy throughout your workday.