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本控制器采用时序控制方式,对实验室内排(或送)风机进行定时启停控制,使实验室内有害气体浓度在安全卫生范围内,以改善工艺操作条件,防止意外事故发生。控制器由一只JS—1电动时间继电器控制风机停止运转时间,一只JS—2晶体管时间继电器控制风机运转时间(排风时间),0—15分连续可调,和二只中间继电器组成,其工作过程如下: 当K_1合上接通电源后,JS—1电动时间继电器开始计时,达到给定时间时,JS—1触点闭合给Z_2中间继电器通电,Z_(2-1)触点对
The controller uses timing control mode, the laboratory row (or send) fan timing start and stop control, the concentration of harmful gases in the laboratory within the scope of safety and health, in order to improve the process operating conditions to prevent accidents. The controller consists of a JS-1 electric time relay to control the fans to stop running time, a JS-2 transistor time relay to control fan running time (exhaust time), 0-15 points continuously adjustable, and two intermediate relays, The working process is as follows: When K_1 is turned on, the JS-1 motorized time relay starts to count. When reaching the given time, the JS-1 contact is closed to energize the Z_2 intermediate relay, and Z 2-1 contact pair