| Title | Conventional pressure balances as reference standards for pressures in the range 10 Pa to 10 kPa |
| Publication Type | Journal Article |
| Year of Publication | 1999 |
| Authors | Sutton, C.M., Fitzgerald M.P., and Jack D.G. |
| Journal | Metrologia |
| Volume | 36 |
| Issue | 6 |
| Pagination | 517 - 520 |
| Date Published | 1999 |
| ISSN | 00261394 (ISSN) |
| Keywords | Barometers, Calibration, Pressure balances, Pressure gages, PRESSURE MEASUREMENT, Sensors, Standards, Temperature control |
| Abstract | Two methods are presented for using conventional pressure balances in the pressure range 10 Pa to 10 kPa. Both these methods overcome the inability of a pressure balance to generate directly pressures below a limit determined by the mass of the floating element. The first method uses twin pressure balances, with the desired low pressure established above one pressure balance in terms of a small added mass on the other pressure balance. This method is shown to be capable of realizing low absolute pressures with a standard uncertainty below 2 mPa+(9×10-6)p, when operating the pressure balances at 100 kPa. The second method uses one pressure balance in conjunction with a high-resolution pressure gauge. A calculable low pressure is established above the pressure balance either by reference to an added mass on the pressure balance or by a change in the pressure gauge reading. A 100 kPa pressure balance is used in combination with a commercial high-precision barometric pressure gauge, modified to improve the temperature control of its sensor. The standard uncertainty associated with this implementation is shown to be about 14 mPa+(9×10-6)p. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-0033296666&partnerID=40&md5=abc12b10e8228b18a7226a968ce59cab |
| DOI | 10.1088/0026-1394/36/6/6 |
