| 摘要 |
PURPOSE:To obtain a high-precision operation pattern with a small quantity of stored data to perform safe operation by storing a coefficient, which approximates secondary the curve of the operation region of a pump to a curve, for every operation pattern and setting a current operation pattern on a basis of an actual flow rate and an actual lift head in the actual measuring operation state. CONSTITUTION:A monitor device 4 is connected to plural pump equipments 2, and respective operation state signals SP1-SP4 and rotaion numbers NP1-NP4 of equipments 2 are inputted to the device 4. A suction pressure signal Pi from a pressure gauge 5 in the side of a water source 1, a discharge pressure signal Po from a pressure gauge 3 in the discharge side, and a discharge flow rate signal Q from a flow meter 6 are inputted to the device 4. A display device 7 is connected to the device 4, and rotation number upper and lower limit set signals Nu and Nd are imputted to the device 4, and a monitor display output signal M is outputted from the device 4. Coefficients of second-degree curves A-D of operation regions of pumps are stored in a storage table of the device 4 for every operation pattern. The current operation pattern is decided on a basis of the flow rare and the lift head in the actual measuring operation state. |
