Control and Instrumentation articles from January 1996

Control and Instrumentation archives from January 1996

Enabling technology. (valves, actuators and network protocols)(Editorial)
January 1, 1996... At the start of a New Year, it's worth taking a few moments to examine hat we're doing - rather than blindly dashing on with the daily round. In this spirit, and because this issue is concerned with valves, actuators and positioners, it makes...

Programmable controllers: what does the future hold for the PLCs and SCADA? (programmable logic controllers; supervisory control and data acquisition systems)
January 1, 1996... Over the past decade, the PLC 'envelope' has been stretched.in many different directions to the point where the technology is now being used for applications which have traditionally been handled by a diverse array of dedicated systems. For...

Valve positioners: cutting operating costs.
January 1, 1996... Reduce downtime and increase product quality by using position transmitters on modulating valves Process engineers are searching for more efficient ways to improve process quality and increase plant throughput. And, control valves are being...

Throttling control valves.
January 1, 1996... Most control valves throttle at just 60% opening; but this need no longer be the case Valves are always oversized. The required flow capacity, Cv, of a control valve for an application is usually determined by the use of recognised valve...

Much much more than SCADA power. (supervisory control and data acquisition system)
January 1, 1996... Windows NT and Windows 95 are the facilitators - client-server and 32bit, etc - but it's object-orientated, dynamic blocks that will transform PCs for process Who would have thought it? Within weeks of Foxboro and Honeywell launching their...

Maintenance goes predictive.
January 1, 1996... Achieving cost effective maintenance means integrating condition monitoring, reliability centred maintenance and total productive maintenance British industry now seems partially convinced of the key role that asset care plays in achieving...

Humidity guide. (Humidity Code of Practice)
January 1, 1996... Measurements have been dogged with problems; but next month sees a new Code The presence or absence of water vapour in air or other gases influences a vast range of physical, chemical and biological processes. Humidity measurements are useful...