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A High Precision Load Cell Mass Comparator.

Randall M Schoonover1

  • 1Center for Absolute Physical Quantities, National Bureau of Standards, Washington, DC 20234.

Journal of Research of the National Bureau of Standards (1977)
|December 9, 2021
PubMed
Summary
This summary is machine-generated.

A new mechanical method creates a high-precision mass comparator using a strain gage load cell. This device achieves high accuracy for even large, unwieldy objects.

Keywords:
Constant loadingforcehigh precisionhigh-precision weighingload cellmassmass comparatormass differencestrain-gagesubstitution weighingweighingweights

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Area of Science:

  • Metrology
  • Mechanical Engineering
  • Instrumentation

Background:

  • High-precision mass comparison is crucial in scientific and industrial applications.
  • Existing balances can be challenging for irregularly shaped or very large masses.

Purpose of the Study:

  • To describe a simple mechanical fabrication method for a high-precision mass comparator.
  • To evaluate the performance of the comparator for unwieldy objects.

Main Methods:

  • Fabrication of a mass comparator utilizing a bonded strain gage load cell.
  • Testing the comparator with various masses, including those typically considered too unwieldy for standard balances.

Main Results:

  • The developed mass comparator demonstrates high precision.
  • A standard deviation of less than 0.0003% was readily attainable.
  • The device proved effective for comparing masses of objects usually deemed too unwieldy for large, high-precision balances.

Conclusions:

  • A simple mechanical method can yield a high-precision mass comparator.
  • The strain gage load cell-based comparator offers a practical solution for measuring large and unwieldy masses with exceptional accuracy.