Pipeline pump several ways to determine the normal operation: 1, no abnormal noise during operation, run one hour motor is not hot (with experience). 2, look at the import and export pressure pump design point near the head of the operation (with a pressure gauge). 3, measuring motor operating current within the motor rated current (with ammeter). 4, see the flow meter running near the rated flow (with flow meter). Any of the above four methods can determine whether the pump is working properly.