Keysight Truevolt 34465A vs 34470A

The 34470A is the flagship Truevolt DMM and the top choice for metrology labs and precision calibration work. The jump from 6.5 to 7.0 display digits gives you one more digit of resolution for manual measurements. The DC voltage accuracy improves from 0.0015% to 0.0009% — a 40% improvement that matters for calibration certificates. The most distinctive practical advantage is the 1 GΩ resistance range (vs 100 MΩ on the 34465A), enabling measurements of high-impedance circuits like input stages of op-amps and high-value resistors without loading error. The built-in auto cal (autocal) function continuously corrects for drift caused by temperature changes, keeping accuracy stable over long measurement sessions. The 34465A covers 99% of ATE and bench applications at a lower price; the 34470A targets the extra 1% where every microvolt of accuracy counts.