A METHOD OF ASH LEVEL MON ITORING ELECETROSTATIC PRECIPITATOR

摘要

1. . A method of ash level monitoring for electrostatic precipitators' hopper, comprises A. Using an ash level sensor converting the variable RF admittance analog signal into variable frequency. B. Conversion of variable frequency into current modulation on the single twisted pair supply power 1 i n e . C. Trap the variable frequency from the power supply line using OPTO couplers. D. Reference frequency of each sensor stored in EEPROM data memory. E. Digital tuning to set the value for 'Ash high level ' . F. Integration of sensors. G. Alarm signal through Relay output.