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NISTIR 6969 SOP 8 - Part 1 and 2

Part 1: This 2 hour webinar will examine calibrating large tolerance weights using the Modified Substitution Mass Calibration procedure (SOP 8).

Part 2: This 2 hour webinar will review and apply Uncertainty Calculations to the Modified Substitution Mass Calibration procedure from the "SOP 8, Part I" webinar.

Learning Objectives:

At the end of these two sessions, using your notes and SOP 8 you will be able to:

  • DESCRIBE the process of SOP 8
  • IDENTIFY sources of error
  • IDENTIFY when use of SOP 8 is appropriate
  • Correctly IMPLEMENT SOP 8
  • IDENTIFY the components of uncertainty for the SOP 8 process and use them to develop an uncertainty budget
  • QUANTIFY the components of uncertainty for the SOP 8 process
  • CALCULATE the uncertainty of your SOP 8 process

Materials & Supplies:

Participants need to locate a field weight kit made up of fourteen (14) 2-lb weights. This kit will be used to make measurements as part of the webinar. This measurement information will be used in Webinar NISTIR 6969 SOP 8 Part 2.


Participants must have successfully completed the Fundamentals of Metrology Seminar.



  • Read SOP 8 and SOP 29:
  • Select the proper balance to calibrate a 2 lb mass standard, Read all applicable instrument manuals for the balance and become familiar with the balance operation.
  • Identify the 2 lb mass artifact that will be used as the standard during this calibration process and locate the applicable calibration report for that artifact.
  • Review "Uncertainty Definition" slides from Fundamentals
  • Complete an Uncertainty Budget table (attached) based on identified components currently being used in your laboratory. Think about whether there might be more components to consider.


  • The measurements made in NISTIR SOP 8 Part 1 will be used in this webinar.
  • Review the uncertainty budget information of SOP 8 and read SOP 29.
  • Send a copy of your calibration report from SOP 8 part 1 to Val Miller (e-mail: val.miller [at] (val[dot]miller[at]nist[dot]gov) or fax: 301-975-8091)
  • Be prepared to discuss your uncertainty budget during the webinar.

Pre-Work Deadline:

Part 1: Complete prework by June 22, 2016.

Minimum Requirement(s):

Completion includes completing pre-work assignment, full attendance and participation in the session activities and discussion.


State laboratory staff who have responsibilities for developing, implementing, and/or improving the quality management system in their laboratory as well as those who are seeking OWM recognition and/or accreditation or improvements to support recognition/accreditation. This course is available for non-weights and measures participants.


The current fee for webinars is $199 and confirmed participants will be provided with payment instructions. Registration fees for State weights and measures regulatory officials and metrologists are funded by NIST OWM.

Technology Requirement(s):

Webinar: The webinar will be a live stream, so participants must have a constant connection during the webinar.

  1. Operating System (browser) configurations:
  • Windows XP (Explorer 8, 9, 10, 11; Mozilla Firefox; Google Chrome)
  • Windows Vista (Internet Explorer or Firefox)
  • Windows 7 or 8 (Mozilla Firefox; Google Chrome)
  • Apple Mac OS 10.5x (Mozilla Firefox; Apple Safari; Google Chrome)
  • Ubuntu Linux (Firefox only)
  • Media players
    • In order to access the event, you must have, at a minimum, Adobe® Flash® Player 11.2+ installed on your computer. Please visit to download the Flash Player.
  • Optional: If you have never attended an Adobe Connect meeting before:
    Test your connection:
    Quick start guides:
  • Instructor(s):

    Val Miller
    Office of Weights and Measures,
    Phone: (301) 975 - 3602
    Email: val.miller [at] (val[dot]miller[at]nist[dot]gov)


    NIST / Office of Weights and Measures

    IACET CEUs Offered: 6.0

    Class size Min/Max: 4/12

    Class No. 5450

    Time: 10:00 a.m. - 12:00 p.m. ET

    Registration Deadline: Thursday, June 16, 2016

    Created June 14, 2016, Updated July 23, 2020