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两年前ITT Barton仪器工业公司推出的DMX—6000是率先进行过程控制的分布式测量系统之一,当然也是第一个利用光纤进行传输的系统。1985年1月《控制工程》这一期中有该系统的详细报导。原系统包括由电池驱动的压力、压差、RTD和热电耦的发送器,不需电线供电,而且都是可在恶劣环境下使用的本质安全设施。防爆直读式频率计也是传感器中的一部分。每一
Two years ago ITT Barton Instruments introduced DMX-6000 as one of the first distributed measurement systems for process control and, of course, the first system to utilize fiber optics for transmission. The system was extensively covered in the January 1985 issue of “Control Engineering”. The original system includes a battery-powered transmitter of pressure, differential pressure, RTD and thermocouple that is cordless and is intrinsically safe for use in harsh environments. Explosion-proof direct-reading frequency meter is also part of the sensor. Each one