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Making AC Voltage measurements to 10ppm accuracy with the Keysight 3458A

This page contains documentation and software to make high accuracy AC Volts measurements using Swerlein's Algorithm (as it is known in industry). The 3458A is used in the DC voltage mode to maximize resolution and minimize noise. The smaller bandwidth is adequate for low-frequency voltage measurements to 10ppm. The implementation is usable for up to 1% distorted sinewaves with frequencies below 0.01 Hz and up to 1kHz with voltages from 10mV to 700V. Also, the error analysis serves as a tutorial on the limitations of integrating voltmeters used in a digitizing application.

Available for download are:

  • Swerlein's Algorithm introduced in August 09, 1991 in Adobe Acrobat (pdf) format.
  • Swerlein's HP BASIC program introduced with the paper (Gods_ac.txt)
  • An application that you can install to make high accuracy AC measurements with the 3458A. Requires the 3458A, Microsoft ® Windows and GPIB. Includes Swerlein's paper in the help file. (agt3458rs_2.zip)
  • The Mircosoft ® Visual Basic 6.0 source code for the above application. (agt3458rs_src.zip)

KEYSIGHT PROVIDES THIS FREE SOFTWARE "AS IS". ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO ANY WARRANTY OF NON-INFRINGEMENT, THE IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY, REASONABLE CARE AND SKILL, AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY DISCLAIMED.

Documents & Downloads

Swerlein's Algorithm 
Swerlein's Algorithm introduced in August 09, 1991.

Application Note 2003-04-01

null PDF 74 KB
Swerlein's HP BASIC Program 
This HP BASIC program was introduced with the paper.

Programming Example 2003-04-01

Microsoft (R) Visual Basic Source Code for High Accuracy AC Measurements 
This is the Microsoft (R) Visual Basic source code for the "High Accuracy AC Measurements with the 3458A" application.

Programming Example 2003-04-01