公开(公告)号：US3890494A

公开(公告)日：1975-06-17

申请号：US45573874

申请日：1974-03-28

Applicant: PHILLIPS PETROLEUM CO

Inventor： MESHEK HARRY M ,  STREET VERN A

IPC: G01N30/86 ,  G05B19/04 ,  G05B19/00

CPC classification number: G05B19/04

Abstract: Apparatus and method are disclosed whereby loss of power to a process control system will result in overriding the process control system for a preselected time following the restoration of power at the end of the power interruption. In a preferred embodiment, loss of power to a digital programmer controlling at least one chromatographic analyzer results in isolation of the chromatographic analyzer from the sample source upon restoration of the power, backflushing the chromatographic analyzer column and resetting the digital programmer.

Abstract translation: 公开了一种装置和方法，由此在过程控制系统的功率损失将导致在电力中断结束时恢复功率之后的预选时间超过过程控制系统。 在优选的实施方案中，对控制至少一种色谱分析仪的数字程序器的功率损失导致在恢复电源时反应色谱分析仪与样品源的分离，反冲洗色谱分析器列并重新设置数字编程器。

公开(公告)号：US3633616A

公开(公告)日：1972-01-11

申请号：US3633616D

申请日：1970-09-02

Applicant: PHILLIPS PETROLEUM CO

Inventor： MESHEK HARRY M

IPC: G01N30/38 ,  F16K37/00 ,  G01N31/08 ,  H03K23/08

CPC classification number: G01N30/38 ,  Y10T137/8242

Abstract: Apparatus comprising two flip-flop circuits is employed to control selectively the passage of two fluid streams to an analyzer. Signals are also established to indicate the particular stream being passed to the analyzer.

Abstract translation: 采用包括两个触发器电路的装置来选择性地控制两个流体流通向分析器。 还建立信号以指示传递到分析器的特定流。