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Ask The Experts

Get Answers to Your Process Control Questions Here

"Ask The Experts" is moderated on ControlGlobal.com by noted process control authority and CONTROL Columnist Béla Lipták. Lipták either answers the questions himself, or brings in one or more experts from his cadre of co-authors that worked with him on the Instrument Engineers' Handbook, Fourth Edition. Save yourself the hefty consulting fees by getting the answers to your questions here.

• TV Reports, Heating Value of Natural Gas, PID Outputs
• Continuous Level Measurement; Noise Filters
• How to Measure pH Inside a Tank; Increasing Scan Times
• Cavitation in Control Valves
• Split-Ranging Multiple Valves
• D/P Cell Installation, Elevation; Isolation Fuses in Is Circuits
• Does Valve Size Matter? Ethernet or Modbus?
• Open Loop Tuning and Process Control en Español
• Difficult Level Measurements
• Solar Generators; Control Valve Boosters
• D/P Cell Settings, Plus Good Books
• Detecting Bunker C Oil Mass Flow
• Aluminum anodizing temperature control
• Regulating inlet fluid temperature
• Measuring flare gas; Controller set points
• Ink control, steam drums, smart positioners
• Features and capabilities of hybrid controllers
• Failing safely with shutdown systems
• Getting loopy with control loops
• So much to learn, so little time
• We can’t believe our vortex shedding flowmeter
• Where are the best opportunities in the field of process control?
• Measurement problems on a high level
• Books and online courses recommended for continued education
• Valve-position control with an external reset feedback
• Reactor level measurement
• Bumpless switching of most open valves

HOW DO I . . .
We've started a series of informative process control "How To" articles we hope will be of interest to you at ControlGlobal.com. These articles are short, informative, and without relevance to specific products. They are written for a general understanding of process control techniques, applications and solutions.  

• How do I adjust for DO₂
  Flexibility is what you need when it comes to controlling fermentation. This abbreviated description (full version is AN304) focuses on applying Mantra's advanced process control solution for dissolved oxygen.
• How do I tune cascade loops
  Tuning a cascade loop is simple, as long as the concepts of the cascade loop are understood. In this installment of "How Do I . . ." we take a look at a common cascade loop application.
• How do I select an ultrasonic system
  In water and wastewater plants around the world, ultrasonic is the level and fl ow technology of choice, and for many good reasons.