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Source domain: nmisa.org
Collected on 28 June 2026
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The standard of standard-setting
This article explores the role and impact of ISO standards, using ISO 6 for camera film speeds as a historical example. It discusses how standards like these continue to influence modern technology, including digital cameras, and highlights the broader significance of standard-setting organizations.
Dr Angelique Botha  The standard of standardsetting Standards developed by the International Organisation for Standardisation are often hidden in plain sight. ISO 6 is a standard for camera film speeds that was developed to allow photographers to select the right film for their purpose, considering factors such as the available levels of lighting and the speed of their subject. In sunny weather, a slower film with a low ISO number, such as ISO 100 worked best, whereas a faster, more reactive film was required for cloudier conditions. Even today, you will still find an ISO setting on
Reference
https://www.nmisa.org/publications/Pages/Technical%20Publications.aspx
Accurate clinical tympanic measurement system at the NMISA
This publication details a traceable calibration system developed by NMISA for infrared ear thermometers, enabling accurate temperature measurements in healthcare settings. It includes technical specifications such as measurement capability of 40 mK to 70 mK (k=2) between 35.5°C and 41.5°C, with an uncertainty of 45 mK (k=2) at 37°C.
Efrem Ejigu Accurate clinical tympanic measureme nt system at the NMISA, NCSLI measure Infrared ear thermometers allow users to measure body temperature quickly and non-invasively by inserting a probe into the patient’s ear canal. The effectiveness of tympanic ear thermometers is dependent on how accurate their measurement is. This prompts the demand for accurate and reliable calibration of ear thermometers. Developing capability and providing traceability to the health care facilities in South Africa have become crucial, as there is no calibration laboratory that provides such a service. A
Stimulated parametric down-conversion for spatiotemporal metrology
This technical paper examines the stimulated parametric down-conversion process using a Wigner functional approach, focusing on spatiotemporal degrees of freedom. It applies to advanced metrology applications such as nonlinear interferometry and provides insights into experimental parameters affecting measurement precision.
Filippus S. Roux Stimulated parametric downconversionion for spatiotemporal  metrology  The process of the stimulated parametric down-conversion is analyzed with the aid of a Wigner functional approach to investigate the effects of the spatiotemporal degrees of freedom. The output state from this process is represented by a Bogoliubov transformation of the input state, where the Bogoliubov coefficients become kernel functions representing the spatiotemporal properties of the process in the full Wigner functional approach. It thus reveals the effect of the experimental
