The instrument is detecting the paint enameled wire speed temperature control and the method of constant temperature test instrument, one of the instruments is set up and can be used to test the 3.00 mm and the following paint Taoyuan line under thermal state film after softening insulation performance. According to the set the preheating temperature, test time, instruments, and automatic completion of preheating of the sample, test voltage, load, test time or sample was a breakdown or discharge load, a sound and light signals. The instrument adopts the thermocouple temperature measurement, intelligent temperature control, can automatically adjust and showed the test temperature, a test of the use of advanced integrated circuits, the whole test process is automatic.