A Simple Gravimetric Method to Determine Barometer Corrections

نویسنده

  • Randall M. Schoonover
چکیده

Presented here is a gravimetric me thod to calibr a te barometers. The difference in forces exerted on th e pan of a balance is observed for tw o we ll charac terized artifac ts of nearly equ al masses but different volumes. During the weighing, air tempera ture and re lative humidity ar e meas ured; the ambient pressur e is then calculated from an a ir density equation. A barometer correc tion is derived and then compared to an independent value based on a s tandard barometer. The da ta indica te that pressur e can be calcul ated with an uncertainty (I S.D.) of not more than 400 ppm at one atmos phere.

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تاریخ انتشار 2010