Single instrument for insulation and pressure testing a single instrument for insulation and continuous insulation test voltage test (500/1000 V) and pressure (500VA inverter power) automatic mode can be insulation, voltage insulation either Continuous measurement manual mode can be insulation test, pressure test were a single measurement voltage and insulation test mode, you can save much of the 10 kinds of test set standard interfaces (external I / O, external switches, RS-232C, status output )