| 摘要 |
An inexpensive and compact leakage tester is provided, which performs a leakage determination on a measurement object automatically and with high accuracy. The measuring operation for the leakage determination is carried out in the order of a pressurizing step, a balance step, a measuring step, and an exhaust step. In the pressurizing step, volume data on the measurement object (2) is automatically estimated. In the automatic estimation of this volume data, rather than performing the measurement in a transient state such as during the starting phase of the pressurization, the pressurization is temporarily stopped and the pressure measurement using a gauge pressure sensor (17) is performed after the pressure in an endoscope (2) and a pipe (13) including the gauge pressure sensor (17) becomes uniform, thereby estimating the volume of the measurement object such as the endoscope (2). Then, in the measuring step, based on the obtained volume data and a pressure decrease value for a fixed period of time as measured by the gauge pressure sensor, the leakage state is determined by determining in which part of preset characteristic regions the data is located. Here, the output from the gauge pressure sensor (17) is amplified as required for observation. |
