| 摘要 |
PURPOSE:To enable evasion of malfunction owing to a noise signal, simplification in circuit constitution of an amplifier, ease of adjustment and spacing between specific sensor and control units by using said units to a control device and connecting both units by means of an optical fiber. CONSTITUTION:A control device consists of sensor and control units 9, 10 between which communication is accomplished by means of an optical fiber cable 8. A plating soln. is conducted to sensors S1-Sn and the outputs of the sensors are converted from analog to digital values by converters C1-Cn at every specified time. The converted values are stored in the device 1. The average value of the stored values is sent by the request of a main calculator 6 to an apparatus 6. The apparatus 6 determines the concn. of the soln. compsn. by a prescribed equation from the output values of the respective sensors and calculates deficiency by a difference from a set value. Said apparatus commands a pump switch 4 to run a pump for a required time thereby supplying the replenishing soln. |
