Yokogawa and the Industrial Technology Research Institute (Product Research Institute) jointly developed the "e-trace" system, a remote calibration solution for digital pressure gauge standard instruments. The system was showcased at the "Measurement Exhibition 2007 Tokyo," which concluded on November 9, 2007. If fully implemented, e-trace has the potential to significantly reduce calibration time and lower associated costs.
Traditionally, manufacturers of measurement equipment must send their devices to a third-party calibration service provider, as these providers possess calibrated reference instruments that meet Japanese national standards. However, this process is often time-consuming and complex due to the size and complexity of the calibration equipment. It typically takes around two months to transport the device and complete all necessary procedures. Additionally, the operation requires skilled personnel, making automation difficult.
Previously, e-trace used an independent arbiter—calibrated according to Japanese national standards—for remote calibration. After the calibration service provider and the manufacturer collaborated through an online platform, the research institute would dispatch the arbiter to the user. Then, the institute would remotely control both the arbiter and the standard instrument via the internet, calculating correction values based on data differences between the two. Once the user returned the arbiter, the institute would issue a calibration certificate.
In July 2007, Yokogawa conducted a remote calibration verification test at its Measurement Standard Center in Japan. In September of the same year, similar experiments were carried out on standard instruments used by Yokogawa’s Chinese subsidiary, with all tests being successful. Based on these results, the research institute is expected to offer measurement standards to Japanese companies operating overseas.
During the experiment, the arbiter operated within a pressure range of 10 to 10 kPa, with an instability of 100 mPa or less. Looking ahead, Yokogawa aims to enhance the performance of the arbiter while also working toward miniaturization and cost reduction. This advancement could further expand the system's applicability and make remote calibration more accessible to a wider range of industries.
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