- Yokogawa’s European Calibration Laboratory, based at the company’s European Headquarters in Amersfoort, Netherlands, has achieved accreditation to the latest revision of ISO 17025:2017 standard, for power measurements at up to 100 kHz.
The standard ISO/IEC 17025:2017, General requirements for the competence of testing and calibration laboratories, enables both Yokogawa’s European Standards Laboratory and its customers to demonstrate that they operate they operate according to standard procedures and generate valid measurement results.
As a result, test reports and certificates can be accepted from one country to another without the need for further testing. This makes ISO/IEC 17025 accredited calibration useful for any R&D team, university, research center or product certification organization that performs testing, sampling or calibration and which requires reliable measurement results.
These calibration capabilities up to 100 kHz are driven by a growing market demand to remove uncertainty in power measurements, caused by inverters used in automotive, railway or aerospace applications that switch at high speeds, introducing harmonics at higher frequencies. These effects have led to a demand for high-frequency power measurements on devices such as switch-mode power supplies, electronic lighting ballasts, soft starters in motor controls and frequency converters in traction applications.
As a result, power calibration at 50 Hz is no longer sufficient, and accredited power calibration at up to 100 kHz is necessary to ensure the accuracy of the measurement results. This accreditation is in addition to the laboratory’s ability to offer high-accuracy calibration at 50 Hz, particularly at very low power factors (down to 0.0001) and at high currents, used for example in power transformer applications.