| 摘要 |
PURPOSE:To save cable installing costs and to eliminate a noise problem, by receiving the signals from a flow-rate-signal generator and a temperature measuring device, and providing a control device, which computes the value that is converted into the flow rate at a specified temperature, in the vicinity of a flowmeter. CONSTITUTION:Signals from a flowmeter 2 and a flow-rate pulse generator 4 and a signal from a temperature sensor 3 are inputted to a control device 5. A volume-converting-factor table is stored in the control device 5 in advance. The specific gravity of oil, which is measured by setting dials 6 and 7 and the correcting value of the instrumental error of the flowmeter are inputted in the control device. The converted volume is selected based on the signal from the sensor 3 and the specific gravity that is inputted before. The signal from the flow- rate generator 4 is corrected by the corrected value of the instrumental error that is inputted before. The computation is performed by the control device 5 and the flow rate is displayed on a display device 9. When the control device 5 is provided in the oil feeding site, cable working costs are a saved, noises are not generated, and the possibility of the breakout of fire can be prevented since the device is enclosed in an explosion-proof chamber. |
