Full-automatic condensation point tester and testing method thereof

The invention discloses a full-automatic condensation point tester. The tester comprises a thermostatic box, wherein a semiconductor chilling plate is arranged on the outer part of the thermostatic box; a test tube is fixedly arranged in the thermostatic box; a piston in sealed connection with the test tube is arranged in the test tube; a pressure sensor is arranged below the piston and elastically connected with the test tube by virtue of a fixing plate and a spring; a sample cup is arranged outside the thermostatic box; and the sample cup is communicated with the test tube by virtue of an oil inlet pipeline and a sampling pump. When the condensation point tester is used for testing, the accuracy of the testing result is improved, and the testing time is shortened. Meanwhile, the invention further discloses a testing method. The testing method breaks the conventional thinking of the traditional testing method, the pressure sensor is adopted, the condensation point temperature is judged by sensing the pressur