6½ & 7½ digit DMMs from Keysight visualise measured data

March 03, 2015 // By Graham Prophet
Two “Truevolt” Series digital multimeters (DMMs) – the Keysight 34465A DMM (6½ digit) and the Keysight 34470A DMM (7½ digit) – help engineers visualise measurement data in multiple ways, get usable information faster, and document results more easily.

Truevolt DMMs’ advanced graphical capabilities, such as trend and histogram charts, help engineers achieve greater insights faster. Both models offer three acquisition modes: continuous running for typical measurements, data logging for easier trend analysis, and a digitising mode for capturing transients.

The 34465A DMM is a new, higher-performance 6½ digit class of DMM that Keysight presents as providing higher speed, better accuracy and more memory. The 7½ digit 34470A DMM is a new product category of DMMs for Keysight and provides even greater resolution and accuracy, a requirement for today’s most challenging devices. Both DMMs offer deeper memory for data storage than previous generation DMMs. They also provide the ability to measure very low current, 1 µA range with pico second resolution, for measurements on very low power devices; plus additional measurement and math functions, extended measurement ranges and advanced triggering.

Both models offer auto calibration, which compensates for temperature drift, allowing users to maintain measurement accuracy throughout their workday. Results are presented on a 4.3-in. high-resolution colour display with numerical readings, measurement trends, histograms and statistical data. Users can save and recall their measurement states and display preferences. The DMMs’ Easy File Access feature provides simple USB connectivity between the Keysight Truevolt DMMs and a PC using standard USB media transfer protocol. The DMMs include drag and drop measurement data capability, adjust instrument settings, and the ability to send screen images to PC applications without additional software. BenchVue software lets engineers control, capture and view Keysight’s DMMs simultaneously with other Keysight bench instruments and with no additional programming.

Real signals are never clean or noise free. They often have an AC component from power line noise or other environmental noise such as electromagnetic interference. How well a DMM deals with these extraneous factors and eliminates them from the true measurement makes a big difference to its accuracy. Using patented analog-to-digital converter technology, Keysight Truevolt Series DMMs account for measurement