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…
Bimetallic Thermometer
A bimetallic strip is made up of metal A and B, having different thermal expansion co-efficient. It is bonded together. These thermometers use the following two principles: 1. All metals…
Bourdon Tube Pressure Gauge
Bourdon tube pressure gauge when an elastic transducer ( bourdon tube in this case ) is subjected to a pressure, it defects. This deflection is proportional to the applied pressure…
Elastic Diaphragm Gauge Principle
Principle of Elastic diaphragm gauges when an elastic transducer (diaphragm is this case) is subjected to a pressure, it deflects. This deflection is proportional to the applied pressure when calibrated.…
