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Process automation specialist Endress+Hauser South Africa’s Temperature Calibration Laboratory has been designated one of the highest performing temperature calibration laboratories in the country by the South African National Accreditation System (Sanas). The lab, located in Apex, an industrial area in Benoni, boasts some of the lowest uncertainty of measurement when compared to other labs (that is, at 0°C ± 0,008 K/°C).

The Endress+Hauser lab is accredited in accordance with the recognised International Standard ISO/IEC 17025:2005 to calibrate instruments from -20°C up to 1550°C. This allows it to cover a wide scope when compared to other calibration labs.

Endress labTo ensure that it continuously offers the lowest uncertainty of measurements, the South African facility not only conducts inter-laboratory comparisons (ILCs) with other local labs, but also performs an annual ILC with two European laboratories situated in Germany and Italy. The latter proves its traceability at a global level.

The reference equipment employed by the lab includes high-precision multi-meters that are sent to the National Metrology Institute of South Africa (NMISA) for calibration on an annual basis. The Endress+Hauser Temperature Calibration Laboratory was initially built to support production, yet over the years it has expanded its offering to include re-calibrations, third party instruments and other laboratories’ reference equipment.

Benjamin Mlangeni, product manager for Temperature System Components & Registration at Endress+Hauser South Africa, says that other South African labs also use the Endress+Hauser lab as a reference for the calibration of their master reference sensors. “This means that other labs send their master temperature sensors to us to calibrate so that they can use them as reference sensors to calibrate their customers’ units. Normally we calibrate new instruments, which are manufactured in our factory. However, we also calibrate used instruments that our customers need to calibrate periodically for their internal regulatory requirements,” he explains.

“Temperature calibration is a critical process to make certain that an instrument performs within set specifications. Due to the very low uncertainty of measurements at our lab, customers are assured that calibration results are as possible to the real deviation of the instrument.”

A standard three-point calibration takes approximately 2.5 hours depending on the type of instrument, temperature range or number of calibration points.

Image credit: https://www.za.endress.com/en/service-overview/Flexibility-operational-goals-expertise/calibration-compliance-ISO17025

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