Process industrial instruments and controls handbook

[...]... CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK FIGURE 7 Single-capacity process with dead time (West Instruments. ) FIGURE 8 Reaction curve for single-capacity process with dead time (West Instruments. ) FIGURE 9 Two-capacity process (West Instruments. ) P1: FDG/FJP 31 August 1999 23:2 CHAP-02 CONTROL SYSTEM FUNDAMENTALS FIGURE 10 2.9 Reaction curve for two-capacity process (West Instruments. )... ANJ CHAP-01 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK such as cable types, devices per spur, topology, and junction box details, and the execution and status of the basic and advanced function blocks These function blocks are comprehensive enough to become the common control language that leads to standardization and a seamless transition between functionality in the control room and in the... point and power output (West Instruments. ) P1: FDG/FJP 31 August 1999 2.14 23:2 CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK FIGURE 21 Instruments. ) Transfer function for wide-band proportional controller (West FIGURE 22 Transfer function for narrow-band proportional controller (West Instruments. ) small change in temperature produces a large change in output If the proportional band were... ANJ CHAP-01 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK Industrial Weighing and Density Systems Strain-gauge and pneumatic load cells for weighing various hopper and tank vessels as may be used in batching systems are described, as well as a microprocessor-based automatic drumfilling scale Numerous fluid-density measuring systems are reviewed, including the photoelectric hydrometer and the inductance... 11 Electrical analog for two-capacity process (West Instruments. ) FIGURE 12 Reaction curve for three-capacity process (West Instruments. ) P1: FDG/FJP 31 August 1999 2.10 23:2 CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK FIGURE 13 Electrical analog for three-capacity process (West Instruments. ) FIGURE 14 Transfer curve for endothermic process As the temperature increases, the slope of... otherwise cooperated in an outstanding manner in furnishing information and helpful counsel to the editorial staff 2.1 P1: FDG/FJP 31 August 1999 2.2 23:2 CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK CONTROL PRINCIPLES PROCESS (LOAD) CHARACTERISTICS Process Reaction Curve Process Transfer Function CONTROL MODES On-Off Control Action Proportional Control Offset Manual and Automatic Reset Automatic... the process transfer curve, as shown in Fig 25 FIGURE 24 Process of coming up to temperature with an off-set (West Instruments. ) P1: FDG/FJP 31 August 1999 2.16 23:2 CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK FIGURE 25 Mechanism by which offset occurs with a proportional controller Assume that a process is heated with a 2000-watt heater The relationship between heat input and process. .. FJP/FGB QC: ANJ CHAP-01 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK SECTION 9: VALVES, SERVOS, MOTORS, AND ROBOTS Process Control Valves This article describes not only both general and special types of control valves, actuators, and accessories in terms of features needed in a large variety of applications, it also describes the issues to be addressed for the best valve and material selection... 1999 23:2 CHAP-02 CONTROL SYSTEM FUNDAMENTALS FIGURE 1 Manual temperature control of a process (West Instruments. ) FIGURE 2 Automatic temperature control of a process (West Instruments. ) 2.5 P1: FDG/FJP 31 August 1999 2.6 23:2 CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK decreases as the product of A and B increases Such increases in the product AB appear as an increasingly pronounced... subject to process disturbances and electrical interference, which could cause the output to cycle rapidly as the temperature crosses the set point This condition would be detrimental to most final control devices, such as contactors and valves To FIGURE 16 On-off temperature control action (West Instruments. ) P1: FDG/FJP 31 August 1999 2.12 23:2 CHAP-02 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK . 15:19 CHAP-01 1.6 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK Industrial Weighing and Density Systems Strain-gauge and pneumatic load cells for weighing various hopper and tank vessels. CHAP-01 1.14 PROCESS/ INDUSTRIAL INSTRUMENTS AND CONTROLS HANDBOOK such as cable types, devices per spur, topology, and junction box details, and the execution and status of the basic and advanced. Data Process/ industrial instruments and controls handbook / Gregory K. McMillan. editor : Douglas M. Considine, late editor-in-chief. — 5th ed. p. cm. ISBN 0-07-012582-1 1. Process control Handbooks,