This article introduces relevant calibration items of ASTM D 3985. The comparison of empirical tests has proved that test data of different-pressure method vary with that of equal-pressure method. Continue reading
This article elaborates on the calibration method of reference material calibration used by current equal-pressure method gas permeability testing, and analyzes practical application situations of reference material calibration. Continue reading
This article presents a comprehensive introduction to differential-pressure method in terms of its methodology source, test condition and test capability so as to illustrate the scientific and precise nature of gas permeability test using differential-pressure method. Continue reading
Based on Labthink’s empirical research and its long term operation of equal-pressure method gas permeability testers, this article introduces advantages of equal-pressure method gas permeability testing in some special fields. Continue reading
this article analyses test duration of gas permeability test and concludes that system purge time should be included into test duration. At the same time, this article introduces the factors affecting transmitting equilibrium. Continue reading