Related Experiment Video
Updated: Jan 24, 2026
09:26
How to Build a Vacuum Spring-transport Package for Spinning Rotor Gauges
Published on: April 7, 2016
9.6K
Recommended practice for calibrating vacuum gauges of the ionization type
James A Fedchak1, Patrick J Abbott1, Jay H Hendricks1
1National Institute of Standards and Technology (NIST), Gaithersburg, MD 20899.
Journal of Vacuum Science & Technology. A, Vacuum, Surfaces, and Films : an Official Journal of the American Vacuum Society
|May 17, 2019
Summary
This article details a recommended practice for calibrating ionization gauges using a comparison method against an SI-traceable standard. It covers both hot- and cold-cathode types, providing guidance on apparatus, operation, data analysis, and uncertainty reporting.
Area of Science:
- Metrology
- Vacuum Science
Background:
- Accurate pressure measurements are crucial in various scientific and industrial applications.
- Ionization gauges are widely used for measuring low pressures in vacuum systems.
- Standardized calibration procedures ensure reliable and comparable measurement results.
Purpose of the Study:
- To provide a recommended practice for calibrating ionization gauges.
- To detail the comparison method for gauge calibration.
- To ensure SI traceability for ionization gauge calibrations.
Main Methods:
- Calibration of ionization gauges using the comparison method.
- Comparison against a working standard with SI traceable calibration.
- Applicable to both hot-cathode and cold-cathode ionization gauges.
Main Results:
- Detailed description of the calibration apparatus.
- Explanation of the principle of operation for ionization gauges.
- Methodology for data analysis, uncertainty budget, and reporting.
Conclusions:
- The recommended practice facilitates accurate and traceable calibration of ionization gauges.
- Standardized procedures enhance the reliability of low-pressure measurements.
- Comprehensive guidance supports metrologists and vacuum scientists in calibration processes.
Related Concept Videos
03:12Ionization Energy
43.1K
The amount of energy required to remove the most loosely bound electron from a gaseous atom in its ground state is called its first ionization energy (IE1). The first ionization energy for an element, X, is the energy required to form a cation with 1+ charge:
43.1K
01:20Pressure Gauges
5.2K
Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
5.2K
01:11Glassware Calibration
1.3K
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
1.3K
01:12Instrument Calibration
695
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
695
01:15Design Example: Strain Gauge Bridge or Wheatstone Bridge
979
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
979
02:37Types of Chemical Bonds
93.9K
Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
93.9K