Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Operation and Reference Manual for the NIST Automated Ac/dc Calibration Systems and Software



Thomas E. Lipe


This document provides a reference for the NIST automated systems for the determination of the ac-dc difference of thermal converters. It presents the structure of the LabVIEW software routines that control the systems, as well as explicit instructions for operating the systems. Detailed descriptions of subroutines are presented, as well as instructions for calibrating many different types of thermal converters. A developmental history of the NIST automated systems is included, as is an extensive list of references.
Special Publication (NIST SP) - 250-61
Report Number


ac/dc transfer, automated systems, instruction manual, thermal converters, thermal transfer standard, ac/dc difference
Created May 1, 2004, Updated January 27, 2020