A Calibration Method for the Logging Instrument Used in Harsh Environments

Abstract:

Due to the impact of harsh environments with temperatures higher than 150 °C, the characteristics of the amplifying circuits of logging instrument can be changed, to cause the large measurement error. Therefore, a new calibration method is proposed to obtain the gain value and offset for pre-amplifier system. This method use multiple calibration signals and based on the last square theory to complete the calibration work. At the experiment of calibration for the multi-parameter formation water logging instrument, the gain error for the pre-amplifier system by this calibration be improve to no exceed 0.15% to compare with over 1% by tradition method.

• Periodical: Applied Mechanics and Materials (Volumes 365-366)
• Pages: 708-715
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.365-366.708
• Online since: August 2013
• Authors: Zhen Huang, Li Kong, Pu Zhang, Xiao Nan Liu, Cheng Zhang
• Keywords: Digital Multi-Parameter Logging, Embedded System, High-Temperature, Multi-Calibration Method, Pre-Amplifier System

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