The Bilateral Comparison for Charge Sensitivity of Standard Accelerometer between NIMT and NMIJ

P. RATTANANGKUL, B. THUMMAWUT, V. PLANGSANGMAS,A. OHTA, T. USUDA

Abstract

The Bilateral Comparison between National Institute of Metrology (Thailand), NIMT and National Metrology Institute of Japan, (NMIJ) was conducted in order to confirm the capability of NIMT. The calibration of charge sensitivity of the accelerometer was carried by interferometry method according to ISO 16063-11. The calibration results were then compared at the frequency range of 50Hz to 5000Hz. The reference standard accelerometer Bruel & Kjaer 8305 was assigned as the artifact.<br /> The calibration methods of NMIJ were according to the Fringe-Counting Method at the frequency range of 20 Hz – 80 Hz and Sine Approximation Method at the frequency range of 100 Hz – 5000 Hz. While the calibration methods of NIMT were according to the Fringe-Counting Method at the frequency range of 50 Hz – 800 Hz and Minimum Point Method at the frequency range of 1000 Hz - 5000 Hz.<br /> The comparison results were agreeable which the EN value was less than 1.0 for the entire frequency range.

Keywords

control, accelerometer, charge sensitivity, vibration transducer calibration, bilateral comparison, NMIJ, NIMT, JICA project

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IMEKO TC

TC22 - Vibration Measurement

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