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The aspects of determining the temperature gradients of thermostatic chambers

The article considers the evaluation of temperature gradients of thermostatic chambers based on their type, specifics, and technical characteristics. The thermostatic chambers are used in the different industries, where the climate parameters are needed to be maintained at a given level. The temperature and humidity reproduced by thermostatic chambers have a significant influence on the results of experiments and measurements.When the parameters are maintained at the given level, the properties of substances and materials are preserved, and the measurement results are traceable. In addition to this, temperature and humidity must be evenly distributed in the useful area of the chamber and be stable. Therefore, the periodic control of temperature gradients of the chambers should be carried out.The time of stabilization is one of the important characteristics of thermostatic chambers. Mostly, the time of stabilization is shown in the certificate of industry calibration. After a long period of use of the chambers, the time of stabilization can change, so it is necessary to determine this characteristic before beginning the study of the characteristics.If measurements of temperature gradients were taken before stabilization time, there is a high probability that measured values will increase linearly. This indicates a strong trend. If the sample has a trend, then further calculation of the characteristics and of the expanded uncertainty will be false.The publication gives an example of the trend determination of the measuring data and the path of its extraction and compares the characteristics values of the thermostatic chambers calculated for trend and non-trend data.