A calibration system for ptu devices

Sari Semenoja, Martti Heinonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Devices measuring pressure, temperature and humidity simultaneously are known as PTU devices. There are hardly any commercial calibration systems for the PTU devices available for low temperatures (< 0°C). To obtain more comprehensive data on the performance of PTU devices, a new calibration system is developed at MIKES. In this PTU Apparatus, pressure, temperature and humidity can be controlled simultaneously so that all combinations over the ranges are possible. The nominal ranges of the system are the following: absolute pressure 500 hPa 1200 hPa, temperature -52°C +80°C and relative humidity 10 % 95 %. The estimated uncertainties (k = 2) of the pressure, temperature and humidity are 10 Pa, 0,1°C to 0,3°C and 1 %RH to 3 %RH, respectively. The construction and operation as well as the results of operational tests of the PTU Apparatus are reported in this paper.

    Original languageEnglish
    Title of host publication3rd IMEKO TC16 International Conference on Pressure Measurement 2007
    Number of pages9
    Publication statusPublished - 2007
    MoE publication typeA4 Article in a conference publication
    Event3rd IMEKO TC16 International Conference on Pressure Measurement 2007 - Merida, Mexico
    Duration: 27 Nov 20071 Dec 2007


    Conference3rd IMEKO TC16 International Conference on Pressure Measurement 2007


    • Humidity
    • Pressure
    • PTU devices
    • Simultaneously control
    • Temperature


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