Developments in the Pressure field at CEM |
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| Nieves Medina, Salustiano Ruiz, Carmen Matilla |
- Abstract:
- In the near future new pressure standards will be operative at CEM. These standards together with the existing will provide traceability to the whole pressure range. These standards are a mercury column, a force piston gauge and a static expansion system.
The mercury column is a U-shaped steel tube filled with mercury. Its measurement principle is Torricelli´s law. The height difference between the two columns is measured by means of a single-beam helium–neon laser interferometric system. Its measurement range is from 1 kPa up to 130 kPa in absolute, relative and differential modes.
The force piston gauge is a recent acquisition. It is a pressure standard designed to cover the range from less than 1 Pa to 15 kPa gauge and absolute pressures. The instrument operates on the piston gauge principle in which the pressure on the piston is measured by a forced balanced load cell.
The static expansion system is based on Boyle´s law with some corrections. This standard will work from 10-4 Pa to 103 Pa. This system consists of two large 100-litre volumes, two 1-litre volumes and a 0.5-litre volume. The system is evacuated by means of two 300 l/s-turbomolecular pumps connected to the large vessels. Both of them will be connected to a primary dry pump. - Keywords:
- mercury column, force piston gauge, static expansion system
- Download:
- IMEKO-TC16-2007-036u.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC16
- Event name:
- Cultivating Metrological Knowledge
- Title:
- 3rd Conference on Pressure Measurement (together with 20th TC3 Conference on Measurement of Force, Mass and Torque & 1st TC22 Conference on Vibration Measurement)
- Place:
- Merida, MEXICO
- Time:
- 27 November 2007 - 01 December 2007