Table of Contents
iv
Initial Configuration...................................................................................................31
Chapter Three: Overview.......................................................................................................33
General Information ...................................................................................................33
Pressure Control Range..................................................................................33
A Typical Control System..............................................................................34
How The 640 Series Pressure Controller Works .........................................................35
Tuning the 640 Series Pressure Controller..................................................................36
Proportional Term..........................................................................................36
Integral Term.................................................................................................37
Tuning the 640 Controller..............................................................................38
Priority of Commands................................................................................................40
Trip Points .................................................................................................................41
Action of the Trip Points................................................................................41
Applications with a Large Differential Pressure..........................................................42
Labels ........................................................................................................................42
Chapter Four: Operation ........................................................................................................43
How To Check the Zero .............................................................................................43
How To Zero a Type 640 (Absolute) Unit......................................................43
How To Zero a Type 641 (Gage) Unit............................................................44
How To Adjust the Span ............................................................................................45
How To Tune the 640 Series Controller......................................................................45
How To Adjust the Trip Point Values.........................................................................46
How To Select the Trip Point Action..........................................................................47
How To Use Trip Points as Error Indicators ...............................................................49
How To Change the Pressure Output Signal Range ....................................................50
How To Select Upstream Control...............................................................................51
Appendix A: Product Specifications.......................................................................................53
Performance Specifications ........................................................................................53
Environmental Specifications.....................................................................................54
Trip Point Specifications............................................................................................54
Physical Specifications...............................................................................................55
Appendix B: Valve Orifice Selection.....................................................................................57
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