Modern societies are highly dependent on information technology (IT) and therefore on IT professionals. The fact is that a large number of practitioners in the IT field have not passed a formal engineering education, and many have other (or no) college degrees. Unfortunately, even a large number of those who completed the engineering studies are not familiar with the issue of professionalism and ethics. IT professionals produce many business systems in today's digital economy, but also they produce, implement and maintain some critical systems – a system whose failure to operate correctly could result in physical injury or loss of life, or catastrophic economic damage. The public has entrusted in these IT professionals a level of responsibility because systems they design, implement and maintain affect the public directly and indirectly. Therefore, IT professionals must exercise the utmost conscientiousness in their designs, implementations and maintenance of IT systems. As such, IT professionals should have an understanding of the responsibilities associated with IT professionals practice.

The paper presents a method used in the Vinca Institute of Nuclear Sciences for a reliable and traceable relative humidity calibration in the temperature range from 5 °C to 45 °C. Inside a controllable temperature and humidity environment, supplied by a mixed-flow humidity generator, measurements of hygrometers under calibration are compared with those of calibrated reference instruments. A traceability chain from temperature to reference relative humidity and next to the hygrometers under calibrations is provided by using a chilled-mirror dew-point temperature system and precise relative humidity probes. Corresponding calibration uncertainties are analyzed, particularly those associated to the temperature uniformity of controlled calibration environment. Two examples of relative humidity calibration with dew-point and relative humidity reference measurements in the range from 15 to 75% of RH and 5 °C to 45 °C are presented and discussed.