Realization of Humidity Standard Facility Using Two- Pressure Humidity Generator and Humidity Chamber

• Autorzy: El-Din E. , Mekawy M. M. , Ali K. M.
• Języki publikacji: EN

Abstrakty

EN

The realization of a dew/frost-point temperature scale is important for the calibration of hygrometers and dew/frost-point meters. Also, it was found that it is prime important for the National Institute for Standards-Egypt (NIS) to develop measurements of humidity field. Experimental work used for realization of the dew/frost-point temperature scale, to calculate humidity measurements with high accuracy and to calculate the measurement uncertainty value of the dew-frost point. The dew-point temperature scale was realized using a two-pressure generator, humidity chamber, chilled mirror hygrometer and testo hygrometer. This work shows that the dew/frost-point temperature scale cover the range from -20 °C up to +70 °C with an uncertainty range from ± 0.52 °C to ± 1.7 °C and covered the calibration requests from Egyptian industries. We are looking forward to increase this range and decrease measurement the uncertainty value.

Słowa kluczowe

EN

dew/frost-point; humidity generator; humidity chamber; hygrometers; realization

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2009
• Tom: Vol. 16, nr 2
• Strony: 323--327
• Opis fizyczny: Bibliogr. 4 poz., rys., tab., wykr.

Twórcy

autor

El-Din E.

autor

Mekawy M. M.

autor

Ali K. M.

• National Institute for Standards, Thermometry & Humidity Measurements Lab, Tersa St. P. O. Box: 136 Giza,12211, El-Haram, Egypt,

Bibliografia

• [1] P.Wiederhold, P: Water Vapor Measurement. 1997.
• [2] E. E. Mahmoud: „Metrological performance of NIS humidity generator”. 5th International Symposium on Humidity and Moisture - ISHM 2006 Brazil May 02-05, 2006.
• [3] R. Pragnell, R. Benyon: “A Prototype Two-Pressure Humidity Generator for the Spanish National Humidity Standard Facility”. Third International Symposium on Humidity & Moisture, 1998.
• [4] B. Kevin: „Methods of Accurately Measuring Capacitive RH Sensors”. 5th International Symposium on Humidity and Moisture - ISHM 2006 Brazil May 02-05, 2006.