• 8.5 digits resolution
• 0.1 ppm DC volts linearity
• 0.1 ppm DC volts transfer capability
• 0.01 ppm RMS internal noise
• 8 ppm (4 ppm optional) per year voltage reference stability 

The Keysight 3458A, 8.5 digit multimeter, has a 30-year industrial-benchmark legacy for remarkable DC accuracy and stability. The redesigned 3458A multimeter also has standard lab 8.5-digit precision with leading-edge DCV linearity accuracy, the lowest internal noise, and it is RoHS compliant.

The 3458A is recognized the world over as the standard in high-performance digital multimeters, provides both speed and accuracy in the R&D lab, on the production test floor, and in the calibration lab. The Keysight 3458A is simply the fastest, most flexible, and most accurate multimeter ever offered by Keysight Technologies. In your system or on the bench, the Keysight 3458A saves you time and money with unprecedented test system throughput and accuracy.

The 3458A multimeter performs a complete self-calibration of all functions, including AC, using high stability internal standards. This self- or auto-calibration eliminates measurement errors due to time drift and temperature changes in your rack or on your bench for superior accuracy. When it’s time for periodic calibration to external standards, simply connect a precision 10 VDC source and a precision 10kΩ resistor. All ranges and functions, including AC, are automatically calibrated using precision internal ratio transfer measurements relative to the external standards.

The 3458A’s reliability is a product of Keysight’s “10X” program of defect reduction. Through extensive environmental, abuse, and stress testing during the design stages of product development, has reduced the number of defects and early failures in its instruments by a factor of ten over the past ten years. Our confidence in the 3458A’s reliability is reflected in the low cost of the option for additional years of return-to-repair.

In the calibration lab, you’ll find the 3458A’s 8.5 digits to have extraordinary linearity, low internal noise, and excellent short-term stability. The linearity of the 3458A’s multi-slope A to D converter has been characterized with state-of-the-art precision. Using Josephsen junction array intrinsic standards, linearity has been measured within ± 0.05 ppm of 10 volts. The 3458A’s transfer accuracy for 10 volts DC is 0.1 ppm over 1 hour ± 0.5 °C. Internal noise has been reduced to less than 0.01 ppm rms yielding 8.5 digits of usable resolution. So, the right choice for your calibration standard DMM is the 3458A.

The long-term accuracy of the 3458A is a remarkable 8 ppm per year − more accurate than many system DMMs are after only a day. Option 002 gives you a higher stability voltage reference specified to 4 ppm/year for the ultimate performance.

The 3458A doesn’t stop with accurate DCV. Similar measurement accuracy is achieved for resistance, ACV, and current. You can measure resistance from 10 µΩ to 1 GΩ with midrange accuracy of 2.2 ppm.

Finally, the 3458A, like its DMM predecessors, offers offset-compensated ohms on the 10 Ω to 100 kΩ ranges to eliminate the errors introduced by small series voltage offsets. Usable for both two- and four wire ohms, the 3458A supplies a current through the unknown resistance, measures the voltage drop, sets the current to zero, and measures the voltage drop again. The result is reduced error for resistance measurements.

The 3458A introduces new heights of true rms AC volts performance with a choice of traditional analog or a new sampling technique for higher accuracy. For calibration sources and periodic waveforms from 1 Hz to 10 MHz, the 3458A’s precision sampling technique offers extraordinary accuracy. With 100 ppm absolute accuracy for 45 Hz to 1 kHz or 170 ppm absolute accuracy to 20 kHz, the 3458A will enhance your measurement capabilities. Accuracy is maintained for up to 2 years with only a single 10 volts DC precision standard. No AC standards are necessary. For higher speed and less accuracy, the analog true rms AC technique has a midband absolute measurement accuracy of 300 ppm using the same simple calibration procedure. With a bandwidth of 10 Hz to 2 MHz and reading rates to 50/second, is an excellent choice for high throughput computer-aided testing.

The 3458A gives you low cost of ownership with a simple, two-source electronic calibration. With its superior linearity, the 3458A is fully calibrated, including AC, from a precision 10 VDC source and a precision 10 kΩ resistor. All ranges and functions are automatically calibrated using precise internal ratio transfer measurements relative to these external standards. In addition, the 3458A’s internal voltage standard and resistance standard are calibrated. Now you can perform a self-verifying, self- or autocalibration relative to the 3458A’s low drift internal standards at any time with the ACAL command. So, if your DMM’s environment changes, auto-calibration optimizes your measurement accuracy.