NCSLI New Mexico Section

Meeting Date: TBD  (new date to come out soon)

Meeting Overview: The Albuquerque NCSL International Section provides metrology related training, information and discussion. The featured topic will be on "AC-DC Difference: Basic Principles." Our goal is to promote metrology, calibration, and testing throughout the region. Come and meet other metrology, calibration, and testing professionals with plenty of time for networking.

Contact Information:
Ricky Sandoval  rlsando@sandia.gov
Edward O’Brien  edobrie@sandia.gov

Meeting Time:
10:00 AM – 12:30 PM

Cost to attend meeting: Complimentary

Topic: AC-DC Difference: Basic Principles
Speaker: Stefan Cular, National Institute of Standards and Technology (NIST)
Abstract: AC-DC difference serves as the fundamental link to the SI for ac voltage, current and power. But where does this quantity come from and how is it applied? In this presentation the underlying principles of the measurements will be presented from basic device physics and determination of the ac-dc difference to scaling the value to the far reaches of the standard calibration service measurement space roughly defined as 1 mV to 1 kV and 1 mA to 100 A over a frequency range of 10 Hz to 100 MHz. The number of ac-dc difference scaling steps from primary standards was reduced over the last decade using thin film multijunction thermal converters, which subsequently reduced the uncertainty provided to customers. Although this rudimentary knowledge is widely published, and there is significant demand for the calibration service, there are only a handful of labs around the world that have independent realization of the ac-dc difference, NIST being one of them.

Meeting Schedule:

9:45 am – 10:00 am Registration
10:00 am – 10:15 am Eddie & Ricky Introduction
10:15 am – 11:15 am Stefan Cular AC-DC Difference: Basic Principles
11:15 am – 12:30 pm Lunch Provided

Past Meetings and Events


Albuquerque Section Meeting June 2018
The NCSL International Albuquerque Section held its summer meeting on June 4, 2018 at the Compa Industries/TEVET Albuquerque Corporate Office. 
Section Meeting Review (.PDF)


Albuquerque Section Meeting January 2018
The NCSL International Albuquerque Section held its winter meeting on January 10, 2018 at the Juan Tabo Public Library. 
Section Meeting Review (.PDF)


Albuquerque Section Meeting May 2014
The Albuquerque Section Meeting was held on May 2014 at the Albuquerque Marriott Hotel, following The Third Seminar on Surface Metrology for the Americas.
Section Meeting Review (.PDF)