| Abstrakt: |
A survey is given of discussions held up to now on the processes taking place in a molecular manometer. The importance of the transfer of heat from the plate to the movable vane, which increases the temperature of the vane, is shown; this heat transfer changes the magnitude of the thermal molecular pressure by means of which the gas pressure in the manometer is measured. A description is given of the experimental arrangement used to measure the vane temperature under different conditions; a description is also given of measurements of the temperature increase of the vane for different temperatures of the plate, different pressure and different values of the distance between the vane and the plate. An analysis of the results shows how the temperature increase of the vane distorts the data of the manometer and stress is laid on the need to take heat transfer into consideration when carrying out exact pressure measurements with a molecular manometer. |
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