Instrument Engineers’ Handbook, 4th Edition, Vol. 1: Process Measurement and Analysis Béla G. Lipták This volume incorporates the latest developments in automation and control, and broadens its outlook to a global perspective. The handbook includes topics such as the detection of flow, level, temperature, pressure, density, viscosity, weight, composition, and safety sensors. It includes contributions from approximately 100 leading industrial and academic professionals. Also covered are sensors, detectors, analyzers, and other measuring devices introduced since publication of the third edition.
Format: Hardbound
Book—2003
ISBN: 0849310830
Length: 1824 pages;
Weight: 7 lbs.
Member: $179.95;
List: $179.95
www.isa.org/iehvol1
Instrument Engineers’ Handbook, 4th Edition, Vol. 2: Process Control and Optimization Béla G Lipták Béla Lipták’s acclaimed “bible” of instrument engineering now enters its fourth edition with fully globalized coverage, an outstanding panel of international contributors, and major additional coverage that reflects the advances made over the last decade since publication of the third edition. Expanded coverage includes descriptions of overseas manufacturers’ products and concepts, model-based optimization in control theory, new major inventions and innovations in control valves, and a full chapter devoted to safety.
Format: Hardbound
Book—2005
ISBN: 0849310814
Length: 2464 pages;
Weight: 7 lbs.
Member: $179.95;
List: $179.95
www.isa.org/iehvol2
Instrument Engineers’ Handbook, 3rd Edition, Vol. 3: Process Software and Digital Networks Béla G. Lipták The third volume in this three-volume set, this best-seller provides an in-depth, state-of-the-art review of existing and evolving digital communications and control systems. Several chapters describe a variety of process-control software packages suited for plant optimization, maintenance, and safety-related applications. Other chapters cover plant design and updating, safety and operations-related logic systems, and the design of integrated workstations and control centers. Appendices provide practical information such as bidders’ lists and addresses, materials selection for corrosive services, and more.
Format: Hardbound
Book—2002
ISBN: 0849310822
Length: 864 pages;
Weight: 5 lbs.
Member: $179.95;
List: $179.95
www.isa.org/iehvol3
The calibration of pressure instrumentation is one of the most common types of calibration that takes place in laboratories and industrial facilities.
The calibration equipment for moderatley accurate calibrations is realtively inexpensive, rugged, and easy to use.
The wide range of pressures in one facility will probably require more than one type or range of calibration standard. The pressure range from 1 inch of water to 100,000 pounds per square inch, for example, represents a 2.77 million to one ratio of maximum pressure to minimum pressure.
The number of standards needed increases if vacuum and absolute pressure calibrations are required and if various fluids such as water, oil,
and gas are required.
Pressure is a derived unit based on the fundamental units of lenght (l), mass (m), and time (t). Earlier sections defined pressure as a force acting on an area ( 12), defined force as an accelerated mass (m), and defined acceleration as (l/t2).
The accuracy of many of the pressure standards depends on how accurately we can produce, maintain, and measure these fundamental units when manufacturing and using the standards.
Dead weight testers are the most widely used type of pressure calibrator and are available in a variety of accuracies, fluid types, ranges, and pressure units.
A typical dead weight tester consists of a fluid
filled chamber that a hand pump, ram screw, or some external force pressurizes. A vertical cylinder together with a close fitting piston that rotates within the cylinder is part of the chamber wall so the fluid pressure acts on the bottom area of the piston.
A pressure port in the chamber allows the connection of the pressure instrument. The fluid pressure acting on the bottom area of the piston produces an upwards force that lifts the piston. The upward force balances out the downward force produced by the addition of weights to the top of the piston.
For full In Tech® story, see www.isa.org/link/PressSqueeze.
References:
Archives