Overview of selected GCTC laboratory equipment: control numbers, names, models, serial numbers and key technical parameters for environmental, mechanical, PV and battery test systems.
On 10 December 2016 the U.S. EPA issued Formaldehyde Emission Standards for Composite Wood Products, the strictest U.S. limits yet, creating a technical barrier for Chinese wood-product exports. CNAS is aligning accreditation with EPA recognition.
SMEs in the Pearl River Delta often juggle separate labs for calibration, repair, testing and trials. A public technical-service platform offers integrated metrology, repair, sales, rental and training.
World Metrology Day (20 May) is a reminder that measurement underpins daily life — from fuel dispensers and blood-pressure meters to market scales. Experts explain common disputes and how to check instruments.
The ten established metrology fields are geometrical (length), thermal, mechanical, electromagnetic, radio, time and frequency, acoustics, optics, chemistry and ionizing radiation.
With tighter market supervision and global trade, product testing and certification is now essential. China has more than 20,000 labs — here is how to choose a professional, accredited third-party laboratory.
GB/T 17743-2021 Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment took effect on 1 July 2022, replacing GB/T 17743-2017. Certificate conversion was due by 1 July 2023.
From 1 July, GB/T 9254.1-2021 replaces GB/T 9254-2008 and GB/T 13837-2012 for CCC EMC. Upgrade fees typically include application, registration, report and any supplementary tests.
For CCC category 0808 colour TV receivers and set-top boxes, GB/T 9254-2021 changes AC mains, tuner, wired-network, optical-fibre and enclosure-port EMC tests versus GB/T 13837.
CNCA technical resolution on GB/T 9254.1-2021: the new EMC emission standard replaced GB/T 9254-2008 and GB/T 13837-2012 from 1 July. Certificates must be upgraded before the next annual audit.
