The Estimate Uncertainty of Indication Error of Mass to Vary Temperature in Calibrated Mass & Center Gravity (C.G.)

Abstract

Objectives of this research are as follows 1. To Calibrate Mass & Center Gravity (C.G.) machine for determination Indication Error of Mass 2.To estimate uncertainty of measurement of calibrate Mass & Center Gravity (C.G.) machine per vary temperature. This research applied measurement principles in a form of direct measurement and criteria for acceptance of measurement standards ISO 10012. In the past of calibration method Mass & Center Gravity (C.G.) machine by using standard weight as the standard reference value which the main basic process of this research and the temperature was controlled between 18-32°C and the relative humidity was controlled between 30%RH to 70%RH. The result of this research found that 1. The Repeatability at Range 76.000 kg which the maximum standard deviation value equals 0.0196 kg at 76.000 kg. 2.The maximum indication error of mass equals 0.2142 kg at 76.000 kg. 3. The uncertainty of measurement of this research was ±0.081 kg at the level of confidence of approximately 95%.