The 3478A provides a low cost, full function, reliable DMM for system measurements or your bench. Selectable 3-1/2 to 5-1/2 digit resolution and 5 autoranging functions offer flexibility in automated testing. The 3478A can measure DCV, true RMS ACV, 2- and 4-wire ohms, and dc and ac current. Selectable speed and resolution provide the right capability for your measurement. The 3478A can perform production tests or acquire experimental data at 90 readings/s with 3-1/2 digit resolution, or take 35 readings/s with 130 dB of noise rejection using 4-1/2 digits. The 5-1/2 digit mode offers 100 nVdc and 100 µW resolution for precise measurements. True RMS with 300 kHz bandwidth and 4:1 crest factor provides reliable measurements of ac signals.