Keeping processes running to specification requires accurate calibration of plant instrumentation. Pressure instrumentation, including gages, switches, transmitters, transducers, and differential-pressure units, all require this attention on a regular basis. Calibration equipment types vary widely.
They may or may not beat the Texas heat, but visitors and exhibitors at ISA Expo/98 will certainly find what they need to clobber competitors at this year's event.Billed by organizers as the biggest control and instrumentation show ever, ISA Expo/98 is the second alternate-year-format event for ISA, the international society for instrumentation and control (Research Triangle Park, N.
Adding intelligence to sensors is a definite trend in the industry. Not too long ago, users were content with just on/off contacts. Engineers now are eager to implement networks. With machine uptime a critical issue, the ability to implement diagnostics to improve maintenance response is also essential.
You have to install a new manufacturing data network. Before you call for a truck-load of twisted-pair copper wire, better check out all the applications. There may be areas where copper won't work.There are other choices. Fiber-optic technology is not new, but is becoming easier to use. Radio frequency is moving from warehouse data collection to sensors and networking.
Considering the globalization trend of industry, a completed control system may be shipped anywhere in the world. To discover what users want and need in enclosures, Control Engineering surveyed 1,500 readers. Of the 465 responses, 50% work in process industries while 39% identified their primary application as discrete product manufacturing.
Industrial networks proponents at NMW emphasized ease of use and other attributes at exhibits and a concurrent FieldComms International (Mooresville, N.C.) conference.ControlNet International's (Coral Springs, Fla.) Bill Moss explained that industrial users should use ControlNet, rather than Ethernet, including media redundancy, intrinsic safety, determinism, and sch...
What functionality and/or features are today's recorder users seeking? How are they applying recorders? Are paperless recorders replacing traditional paper recorders? Are ink recorders more popular than thermal recorders? Do people order more single-channel than multichannel recorders?To find out the answers to these and other questions, Control Engineering conducted original market res...
What functionality/features are today's programmable logic controller (PLC) users seeking? How are they applying PLCs? Is any other technology, such as personal computers, taking away market share from PLCs? Control Engineering wanted to know, so we asked a random sampling of 1,500 readers to participate in a survey about today's PLC.
More users, system integrators, and manufacturers of control hardware and software are realizing the benefits of digital networks at the sensor, device, and fieldbus levels.In this kickoff of the "Year of the Network" series, Control Engineering asked leaders associated with 12 major industrial networks to reveal growth projections, ideal applications, views on standards, and future out...
Explosions can be prevented by limiting the amount of electrical energy available in hazardous areas or by containing the situation using bulky, heavy devices called ‘explosion-proof enclosures.’ Limiting excess electrical parameters such as voltage and amperage (current) requires the use of energy-limiting devices known as ‘intrinsically safe (IS) barriers.’ Explosion-proof enclosures prevent or control explosive situations with brute force. They are heavy containers designed to hold an explosion inside. Electrical devices within explosion-proof enclosures can operate at normal power levels.