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Repiensen sus métodos de trabajo y obtengan resultados inmediatos gracias a nuestros servicios, nuestra capacitación y nuestra pericia en asesoría. Manejen el cambio inteligentemente con nuestras soluciones probadas.
December 2005
In this issue
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Classes and seminars |
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About us |
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Trick of the month |
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To contact us |
See our previous issues :
http://www.topcontrol.com/techinfo/news.php
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Classes & seminars
Seminar on Process Optimization and Performance Assessment Techniques Using PlantTriage
January 23-24, Houston,TX
Seminar on advanced tools in process control
January 25-26-27, Houston, TX
PID Loop Tuning
February 2, Moncton, NB
February 22, Ottawa, ON
Seminar on modern control methods
February 14-15-16, Vancouver, BC
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About us
See our new calendar for 2006
See at : http://www.topcontrol.com/training/tcalendar.php
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We offer a new 1-day class LT-110-1 PID Loop Tuning and
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Trick of the month : Period of the ocsillations
When a control loop oscillates, it is possible to determine if the oscillations come from the loop itself or from the process. Indeed, if one places the loop in manual mode and that the oscillations persist, those extremely probably come from the process or of another loop, unless the positioner is the cause.
Where the oscillations come from?
If the period is 24h, there is high probability that the temperature (sunning) external is in question.
If the period is a multiple (hours or minutes, e.g. 5 min) it is probable that a timer is in cause
(for example for counter-current cleaning) particularly if the form of oscillations is rather square or a peak.
Finally, the period of the oscillations is also a guide as for their origin, for example summarily:
- very short period of a few milliseconds, mechanical problem
- period of a few seconds, flow or pressure loop
- period of a few minutes, level or temperature loop
- etc.
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To contact us
Comments, suggestions and requests are welcomed. Please e-mail us at: info@topcontrol.com
You are welcomed to visit our web site :http://www.topcontrol.com
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49 Bel-Air Street, Lévis, QC
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1020 James Drive, Suite A
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