Realistic Uncertainties in Pressure and Temperature Calibration Reference Values

Abstract

Field instruments require calibration against standards that introduce-insignificant errors of their own in the process. This paper discusses a pressure and temperature calibration facility, analyzes the error levels attained in its routine use and shows that the accuracies are both reasonable and adequate. The results are given in terms of uncertainty; values of 0.025 kPa for pressure and 0.040 K for temperature were shown to meet the needs for calibration of research quality sensors.