Control and Instrumentation articles from February 1996

Control and Instrumentation archives from February 1996

Process calibration: it costs time and money, but it's essential.
February 1, 1996... New quality standards, from IS09000 through to audits by users, are causing process plant managers to look closely at calibration procedures. Equally, increasing competition and the need to reduce costs are forcing a reassessment of the cost...

Flowmetering thoughts out loud.
February 1, 1996... According to a study just released by Automation Research Corp in the USA, sales of Coriolis mass flowmeters are growing at about 10%pa worldwide. The market seems to be wising-up to the value of invariant mass - no worries about changing...

Technology overview over flow: making a choice of meter type requires an understanding of the operating principles.
February 1, 1996... Today's instrument engineers are faced with an array of liquid flowmetering technologies, each offering its own pros and cons. No one technology can fulfil the ideal in every circumstance. So where do we go from here? The accuracy...

Solids flow: mass versus volume. (flow metering)
February 1, 1996... Accurate and reliable solids flow metering is fast becoming a key requirement across the processing industries. A number of systems have been developed, including those for: batch tracking and recording of prime ingredients; flow measurements...

Optimisation and performance monitoring. (cogeneration power plants)
February 1, 1996... Combined Heat and Power (CHP) technology provides (significant cost-savings for any plant or building with a requirement for heat and electrical power (or at least with the opportunity to export a percentage of its electrical power). It is,...

Turning noise into process knowledge.(Signal Analysis)
February 1, 1996... On the majority of process measurements made for control purposes it's accepted that signal frequencies above 3Hz are 'noise'. Consequently, transmitters are seldom designed with response times above 0.5sec - and in many instances signal...

Drives & Controls: a moving exhibition. (Drives & Controls Show and conference)
February 1, 1996... March 5-7 are the dates for the 1996 Drives & Controls Show and conference, this year being staged in Telford. Over 170 exhibitors have taken space, and the exhibition is reported to be 60% bigger than last year. Mike Douglas, Show director,...

Modern drives: now universal variable speed.(Variable Speed Drives)
February 1, 1996... The rapid growth of electrical variable speed drives (VSDs) and the demands for greater precision yet economic solutions have led to competition. Dominated by the rectifier-inverter-fed induction motor drive, the VSD market has seen an...