Practical Process Control System Questions & Answers – 7
There is a problem somewhere in this liquid flow control system. The controller is in automatic mode, with a setpoint of 65%, yet the flow indicator and the flow controller…
Practical Process Control System Questions & Answers – 6
This water filter level control system uses an ultrasonic level transmitter to sense the level of water in the filter, and a controller to drive a motor-actuated valve introducing raw…
Practical Process Control System Questions & Answers – 5
In this process, two chemical streams are mixed together in a reactor vessel. The ensuing chemical reaction is exothermic (heat-producing) and must be cooled by a water cooling system to…
Practical Process Control System Questions & Answers – 4
Consider this control system, set up to maintain the temperature of a chemical reactor vessel at a constant (“setpoint”) value. The reactor’s source of heat is a steam “jacket” where…
Practical Process Control System Questions & Answers – 3
Consider this control system, set up to maintain the temperature of a chemical reactor vessel at a constant (“setpoint”) value. The reactor’s source of heat is a steam “jacket” where…
Practical Process Control System Questions & Answers – 2
On the job, you are sent to troubleshoot a brand-new control system, consisting of a pneumatic liquid level transmitter connected to a pneumatic controller, which in turn drives a pneumatic…
Practical Process Control System Questions & Answers – 1
Consider this control system, set up to maintain the temperature of a chemical reactor vessel at a constant (“setpoint”) value. The reactor’s source of heat is a steam “jacket” where…
What is a Transducer ?
Transducers play an important role in the field of instrumentation and control engineering. Any energy in a process should be converted from one form into another form to make the…
What is LVDT ?
Linear Variable Displacement Transducer (LVDT): A very basic transducer which is always useful in the field of instrumentation, I have studied about this in my college days. Now let me…
Strain Gauge Load Cell
Principle of Strain gauge load cell When steel cylinder is subjected to a force, it tends to change in dimension. On this cylinder, if the strain gauges are bonded, the…
