In order to do the leak test, the line to be tested is connected to MSI-P7 and one pressure measurement hose. To the prescribed pressure the Drager MSI-P7 is fully automatically increases the pressure in the gas line. The leak test can also be performed in 10 to 15 minutes with the P7 plus and in accordance with TRD, data sheet ZVSHK and DVGW-TRGI 2008. In addition to all the functions of the MSI-P7, the P7 plus can take on extra tasks like liquid gas line tests, water pipe tests, regulator tests and pressure measurement up to 5bar.