Calibration of Gas Analysis Devices

Gas analyzers, especially toxic and explosive devices, are usually measuring equipment. Therefore, it is very important to ensure their metrological parameters. For this purpose, their metrological certification is carried out periodically. However, this procedure is quite costly and is carried out by metrological centers that put state sea­ler seals and write a suitable device for operation or not. The interval of the calibration interval is usually more than 1 year and during this period the metrological parameters of the device change and it becomes unsuitable (from the point of view of metrological centers) for operation. Device developers, when writing “inter-calibration interval, for example, 1 year”, they guarantee the preservation of metrological parameters for 1 year. If a longer period has elapsed, the instrument must be set up before calibration. However, the device is customized by the developer or a qualified professional. As a rule, the owner of the appliance does not have such an opportunity and the state verifier lacks it. Therefore, it is very important that the owner of the device is able to independently check its performance. There are many met­hods of calibration of the instrument — for example, partial darke­ning of the working channel, introduction of a sealed cuvette with a certain concentration of the measured gas into the working channel, etc. [1-6]. But all of them have certain disadvantages both in terms of a large error and the possibility of their implementation in option.