ON THE ACCELERATED LIFE TESTS OF PRESSURE GAUGES PART I – THEORETICAL CONSIDERATIONS

Abstract

Information concerning the reliability of products one may obtain by observing their behavior during the real working process and also with help of laboratory tests, on adequate stall.During life tests one imposes the guarantee of real working conditions both on internal stress and on the environment conditions. Supposing that the system is tested after the running in period, meaning during the working life time, when the reliability function is exponential ( = const.), two aspects concern: ) the estimation of the  parameter or of mean time to failure,  = -1, with help of the experimental results; the tests performed in this purpose are the so-called determinative reliability tests; )to establish the test which must be performed in order to compare an unknown value  of the mean time to failure with a given value To*; this tests are called reliability checking tests.