摘要
8701型PH仪有6种控制算法,控制方式的选择和组态灵活方便,并针对PH过程酸碱反应严重的非线性,对PH值进行特征化处理,获得良好的控制品质。针对PH控制中酸碱腐蚀性严重,常用添加剂石灰乳易堵塞管路和阀门等问题,提供多种形式的控制输出量,例如脉宽输出驱动电磁阀或电流输出驱动专门设计的石灰乳分配器。
The 8701 pH controller is microprocessor-based for pH measure-
ment and control in industrial processes. Its control features: versatile and flexible control configuration; the characterization of pH value matching the process-titra-tion curve. The field-selectable types of control output: pulse width-adjusting type for use of solenoid valve, current/voltage-adjusting type for use of electric actuator driving the feeder, etc. Special lime feeder can avoid the clogging frequently encountered under the conditions of using valve or pipe.
