NIST logo
*
Bookmark and Share

Implement Robotic Mass Measurements in SP250 Services

Summary:

This project will develop and implement the procedures required to have fully automated/robotic mass measurement services in the range from 1 mg to 64 kg and for solid density measurements of mass standards in the range of 1 kg to 10 g. The automation of these measurement services will dramatically reduce the turnaround time for mass measurement services by a predicted factor of four, eliminate human errors and other human-induced factors such as thermal effects and operator-dependent repeatability of measurements, and reduce the statistical uncertainty by nearly a factor of two. These improvements will impact nearly all SP250 measurements of mass standards. Cost reduction for NIST customers may be possible; however, cost assessments will be done later since staff involvement will be required for the operation and maintenance of the fully automated systems.

Description:

Full automation of mass measurements requires NIST to:

  1. Develop and optimize the calibration procedures, such as, development of the complex weighing designs needed for multiples and sub-multiples of the mass unit specially adapted for robotic calibrations;
  2. Develop the necessary software required for data acquisition and analysis;
  3. Obtain and integrate all hardware required for the operation of the equipment and the measurement of the environmental conditions;
  4. Validate the developed procedures using NIST mass standards;
  5. Compare to existing procedures;
  6. Develop the statistical process control procedures;
  7. Assess all type A and type B uncertainties and compute final uncertainty budget in compliance with the ISO guide to measuring uncertainty;
  8. Develop complete quality control procedures; and
  9. Develop all documentation required for the ISO 17025-compliant quality manual for mass calibration procedures.

This project will have an impact on the roles of the NIST mass metrology staff. While the robotic systems will still require substantial mass metrology experience to analyze the results, develop special procedures, and perform uncertainty analysis, the labor involved in the actual measurement will be reduced. The skills needed to program, maintain, and operate the robotic systems could be significant. In addition, the capability to perform fully automated mass calibrations will free up a portion of the calibration staff that will be reallocated to support research activities in mass metrology.

Major Accomplishments:

  • Implemented the 64kg robotic balance for SP250 services for weights in the 10 kg to 64 kg range.
  • Developed new weighing designs for the 1 kg to 1 mg range; they are currently under testing and evaluation.
Fully automated/robotic mass measurement services in the range from 1 mg to 64 kg and for solid density measurements of mass standards in the range of 1 kg to 10 g.
Fully automated/robotic mass measurement services in the range from 1 mg to 64 kg and for solid density measurements of mass standards in the range of 1 kg to 10 g.

Lead Organizational Unit:

pml

Customers/Contributors/Collaborators:

Customers:

  • States Weights and Measures Laboratories
  • Army, Navy,and Air Force Calibration Laboratories
  • Boeing
  • Lockheed
  • Amgen, Troemner
  • Mettler-Toledo
  • Los Alamos National Laboratory

Collaborators:

  • KRISS

Staff:

Dr. Zeina J. Kubarych, Program Manager

Related Programs and Projects:

Contact

Physical Measurement Laboratory (PML)
Mechanical Metrology Division (681)

General Information:
301-975-6624 Telephone
301-417-0514 Facsimile

100 Bureau Drive, M/S 8221
Gaithersburg, Maryland 20899-8221