Realization of National Institute for Standards (NIS - Egypt) Viscosity Scale in Wide Temperature Ranges | ||||
| Journal of Scientific Research in Science | ||||
| Article 24, Volume 33, part1, September 2016, Page 281-294 PDF (1.02 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jsrs.2016.15650 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Eman M. mohamed  1; Mostafa. M. Mekawy1; Hoda Mohamed Abo Dorra2
| ||||
| 1National Institute for Standards, Tersa St., El Haram, Giza 12211, Egypt | ||||
| 2Physics Department, Faculty of Women for Arts, Science and Education- Ain Shams University | ||||
| Abstract | ||||
| A new viscosity bathes has been entered the services in Thermal Metrology Laboratory-National Institute for Standards, NIS-Egypt in order to use in maintain and extend the national viscosity scale in wide temperature ranges, international comparison and routine calibration of viscometers. The medium of the bath should be homogenous enough in temperature so many thermal factors taken into account to estimate the temperature gradient, homogeneity, stability and thermal profile distribution with the related uncertainty to each parameter. The study carried out by two Standards Platinum Resistance Thermometer (SPRT) calibrated at fixed point according to ITS-90. A number of glass capillary viscometers have been selected and arranged into six groups. The selected viscometers and oils realize NIS viscosity scale in wide temperature ranges from -30 oC up to 100 oC. | ||||
| Keywords | ||||
| viscosity; Viscometer; ITS-90; SPRT; Fixed Points; uncertainty; Scale | ||||
|
Statistics Article View: 277 PDF Download: 312 |
||||
