Usprawnienie metody pomiarowej wilgotności materiałów budowlanych za pomocą sond psychrometrycznych
Fragment książki (Rozdział w książce)
| Status: | |
| Autorzy: | Guz Łukasz, Suchorab Zbigniew, Sobczuk Henryk |
| Wersja dokumentu: | Drukowana |
| Język: | polski |
| Strony: | 103 - 110 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Psychrometric Peltier probes can be used for porous materials potential determination which can be used for relative moisture estimation. It is also possible to apply them for building materials moisture parameters determination. They enable relative moisture readouts in the narrow range of moisture between 94 and 99.9%. Water film which evaporates from the thermocouple causes temperature decrease and generates of a voltage in a range of some microvolts. Due to external heat flux influence on the applied sensor (Wescor PST-55 probes) the measurement must be conducted in the stabilized conditions. Unstable heat flows and temperature fluctuactions result as vaporizing velocity change from the thermocouple and thus the decrease of measurement results repeatability. This is especially important during measurement of porous material samples with small dimensions. To increase the measuremen accuracy the probes were equipped with metal sleeves having the external diameter of 10mm and wall thickness 1mm. The major aim of the slevess application is to stabilize the instantaneous temperature variations and bridge the heat flows around the psychrometric Peltier probes. |
