PIDTutor publishes book on cascade control
Mastering Cascade Control book
PIDTutor has released a book entitled 'Mastering Cascade Control', which is designed to help technicians and engineers to implement and troubleshoot split-range control applications.
Cascade control uses two controllers with a single control valve to provide faster, more accurate control response to upsets.
It can be used for several different applications, such as heat exchangers, tank levels and distillation column control.
It is widely used in process industries such as pulp and paper, oil and petrochemicals and mining.
'This is a practical book for plant technicians and engineers, using straightforward rules and guidelines, without the complex math,' said George Buckbee, president of PIDTutor and author of the book.
'Mastering Cascade Control' covers all aspects of cascade control use.
Starting with the basics, the book discusses when to use cascade and when to avoid it; costs and benefits of cascade; how to configure the control strategy; how to commission the system, tune the loops; and how to train operators and troubleshoot problems.
This application note presents three different calibration certificates and explains, with diagrams and pictures, what to look for.
A question that is frequently posed is: how often should a recalibration be carried out? In general, the operator is responsible for the determination of calibration intervals. If internal specifications for recalibrations are available, e.g. in the quality management manual, then these will be the official source for recalibration schedules. For some applications, as HBM explains, such specifications may also be present in general standards (e.g. ISO 376 for force measuring instruments ...
Flexim’s portable and versatile flowmeters are approved for use in hazardous areas and are designed to conduct measurements in demanding environments, such as in refineries at pipe temperatures of up to 750°F and beyond.
At the EMC UK exhibition in Newbury on 8–9 October 2013, Teseq will showcase its local calibration and repair services alongside its range of EMC test instrumentation and amplifiers.
Teseq has expanded its capability in field probe calibration to deliver calibration data at all frequencies defined in the IEC 61000-4-3 standard. It can now offer field probe calibration data to 6GHz.