Home » Practical Process Control System Questions & Answers – 16
Practical Questions

Practical Process Control System Questions & Answers – 16

Inspecting the trends of PV and SP on a process chart recorder, you notice the poor quality of control:

Trends of PV and SP on a process chart

The “wandering” of the process variable (PV) around setpoint may be due to excessive action on the part of the controller, or it may be due to load fluctuations in the process itself. In other words, the instability may be the fault of the controller reacting too aggressively, or it may be that the controller is not working aggressively enough to counter changes in process load.

Identify a simple method to determine which scenario is true. Hint: the way to check is as simple as pushing a single button, in most cases.

Answer :

Place the controller in manual mode and observe the PV trend!

Share Your Answers via Comments

More Questions & Answers :
Practical Process Control System Questions & Answers – 11
Practical Process Control System Questions & Answers – 12
Practical Process Control System Questions & Answers – 13
Practical Process Control System Questions & Answers – 14
Practical Process Control System Questions & Answers – 15
Practical Process Control System Questions & Answers – 16
Practical Process Control System Questions & Answers – 17
Practical Process Control System Questions & Answers – 18
Practical Process Control System Questions & Answers – 19
Practical Process Control System Questions & Answers – 20

Share With Your Friends

Related Articles

Thermocouple Terminal block Questions

S Bharadwaj Reddy

Motor Trip Logic using PLC Programming

S Bharadwaj Reddy

A Question on Density Gauge

S Bharadwaj Reddy

Motion-Balance and Force-Balance Instruments

S Bharadwaj Reddy

Diagnosing Electric Motor Circuit

S Bharadwaj Reddy

Hydrostatic Pressure Measurement Questions

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Practical Process Control System Questions & Answers - 16

WordPress Image Lightbox
Send this to a friend