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Automated Piston Gauge Calibration System.

Julia Scherschligt1, Christina D Cross1, John Quintavalle1

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Summary
This summary is machine-generated.

A new automated calibration system for piston gauges (pressure balances) at NIST maintains high accuracy while reducing calibration time by five times. This modernization enhances the dissemination of the pascal, the SI unit of pressure.

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Area of Science:

  • Metrology and Measurement Science
  • Pressure Metrology
  • Calibration Services

Background:

  • Piston gauges (pressure balances) are primary standards for the SI unit of pressure, the pascal.
  • They are also utilized as secondary or working standards for pressure scale dissemination due to their stability.
  • The National Institute of Standards and Technology (NIST) provides calibration services for these critical metrology devices.

Purpose of the Study:

  • To modernize the NIST calibration service for piston gauges.
  • To develop and validate a near fully automated calibration system.
  • To investigate the use of transducers as instantaneous in-situ transfer standards.

Main Methods:

  • Design, construction, and validation of an automated gas-handling manifold.
  • Development of a new software suite for automated calibration.
  • Integration of automated components to create a near fully automated system.

Main Results:

  • The new automated system achieves an expanded uncertainty of approximately 1 in 105, comparable to traditional methods.
  • A five-fold decrease in calibration turnaround time was achieved.
  • The system demonstrates feasibility for instantaneous in-situ transfer standards using transducers.

Conclusions:

  • The modernized NIST calibration service significantly improves efficiency while maintaining metrological accuracy.
  • Automation in pressure calibration enhances the dissemination of the pascal.
  • The new system represents a substantial advancement in pressure metrology calibration services.