PID Controller Selection
A brief tutorial on PID controller selection guide based on Process reaction rate, Dead time and Load changes.It is a complex process to choose the proper mode of control to…
Turbidity Sensor Calibration Procedure
The turbidity method is based upon a comparison of intensity of light scattered by a sample under defined conditions with the intensity of light scattered by a standard reference suspension.…
Oxidation-Reduction Potential (ORP) Sensor Calibration Procedure
ORP stands for Oxidation-Reduction Potential. In practical terms, it is a measurement to oxidize contaminants. It's as simple as that The Oxidation-Reduction Potential (ORP) Sensor measures the ability of a…
Specific Conductance Calibration Procedure
Conductivity is used to measure the ability of an aqueous solution to carry an electrical current. Specific conductance is the conductivity value corrected to 25 DC. Most instruments are calibrated…
Dissolved oxygen probe calibration procedure
Dissolved oxygen (DO) content in water is measured using a membrane electrode. To insure proper operation, the DO probe's membrane and electrolyte should be replaced prior to calibration for the…
pH sensor calibration procedure
A pH meter calibration is performed by measuring a series of reference standards, so-called pH buffers that have known and accurate pH values at different temperatures. Choose the appropriate buffered standards that…
Temperature Sensor calibration procedure
Most instrument manuals state there is no calibration of the temperature sensor, but the temperature sensor must be checked to determine its accuracy. This accuracy check is performed at least…
What is calibration?
Calibration is defined as “a test during which known values of measurand are applied to the transducer and corresponding output readings are recorded under specified conditions.”
Field Instrumentation Interview Questions and Answers
Instrumentation Question bank which helps Instrument Engineers to prepare for Field Instrumentation Interview Questions and Answers in Oil and Gas Plant. Field Instrumentation Questions 1. What are different types of…
PID Controller Theory
Anatomy of a Feedback Control System Here is the classic block diagram of a process under PID Control. PID Controller What’s going on this diagram? The Setpoint (SP) is the…
