Evaluation of Uncertainty in Resistance Measurement for Verificating Meter for pH Meters Based on MCM

LI Xiang

doi:10.12338/j.issn.2096-9015.2024.0197

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LI Xiang. Evaluation of Uncertainty in Resistance Measurement for Verificating Meter for pH Meters Based on MCM[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2024.0197

Citation:

LI Xiang. Evaluation of Uncertainty in Resistance Measurement for Verificating Meter for pH Meters Based on MCM[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2024.0197

LI Xiang. Evaluation of Uncertainty in Resistance Measurement for Verificating Meter for pH Meters Based on MCM[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2024.0197

Citation:

LI Xiang. Evaluation of Uncertainty in Resistance Measurement for Verificating Meter for pH Meters Based on MCM[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2024.0197

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Evaluation of Uncertainty in Resistance Measurement for Verificating Meter for pH Meters Based on MCM

doi: 10.12338/j.issn.2096-9015.2024.0197

LI Xiang

Guangzhou NEM Metrology & Test Technology Co., Ltd., Guangzhou 510380, China

Received Date: 2024-06-20
Accepted Date: 2024-07-22
Rev Recd Date: 2024-07-23

Available Online: 2024-10-14

Abstract

Abstract

The Verificating meter for pH meters serves as a metrological standard device for the verification and calibration of the electrical meter parts of instruments such as pH meters,ion meters,and automatic potentiometric titrators. It plays an important role in the field of electrochemical metrology.With the release of JJG 919-2023 "Verification Regulation of Verificating Meters for pH Meters",there has been no provision of content regarding the uncertainty of resistance measurement results of high-resistance devices in Verificating meters for pH meters.This article evaluates the uncertainty of resistance measurement results of high-resistance devices in Verificating meters for pH meters by applying the internationally recognized uncertainty evaluation methods:the Guide to the Expression of Uncertainty in Measurement(GUM) method and the Monte Carlo Method(MCM).Initially,we use the GUM method to assess the measurement uncertainty of high-resistance values,adopting MCM alchimia software to evaluate the uncertainty of its measurement results through the MCM method.To verify the effectiveness of MCM alchimia software for the MCM method,a comparison of the calculation results of the MCM method and the adaptive MCM method using MATLAB software with more comprehensive computation and visualization capabilities is conducted.The results indicate that the uncertainty outcomes calculated by MCM alchimia software are consistent with those obtained through MATLAB programming.Additionally, by employing the MCM method to validate the GUM method results as described in JJF1059.2-2012,the applicability of the GUM method for evaluating the uncertainty of resistance measurement results of high-resistance devices in Verificating meters for pH meters was assessed and failed to pass the validation.Therefore, applying the MCM method and utilizing MCM alchimia software provides a reference for the standardization of uncertainty assessment methods in resistance measurements of high-resistance devices in Verificating meters for pH meters.
- metrology,
- verificating meter for pH meters,
- Monte Carlo method,
- GUM,
- high-value resistor,
- MCM Alchimia,
- measurement uncertainty

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References(30)

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