Current Transformer Selection, Operation & Maintenance
Current Transformer: For Selection, Operation, and Inspection & Maintenance In general, large currents (hundreds of amperes) cannot be directly input to powermeters for measuring power. Therefore, the current is passed…
PID Controller Parameters Tuning Manually
Though a variety of methods have been discovered for automatically tuning PID parameters, there are thought to be many cases in which adjustments can be made manually based on experience.…
Basics of Thermocouples and RTD
Thermocouples What are Thermocouples? Thermocouples are temperature sensors. They operate under the principle that the junction of two dissimilar metals (forming a closed circuit) produces a measurable voltage (electromotive force)…
Calculate Process Variable from 4-20mA using Fraction of Measurement
An electronic transmitter with an output of 4 - 20 mA is calibrated for a pressure range of 7 - 10 MPa(g). What pressure is represented by a 12 mA…
Zero Elevation and Zero Suppression in Level Measurement
One of the most misunderstood concepts when dealing with transmitters is zero elevation and suppression. Elevation and suppression adjustments are frequently necessary in liquid level measurement when the transmitter cannot…
Pressure Transmitter Applications
Pressure is considered a basic measurement because it is utilized in several process applications for measurement of different process variables such as : pressure, differential pressure, flow, level, density, etc.…
Power MOSFET
A metal-oxide-semiconductor field-effect transistor(MOSFET) is developed by combining the areas of field-effect concept and MOS technology. The Conventional planar MOSFET has the restriction of handling the high power. In high…
Comparison of MOSFET and BJT
When we are studying about Power semiconductor devices, we will start from Diode then Bipolar Junction Transistor and then MOSFET and so on… It is good to know that what…
Power MOSFET Safe Operating Area
The safe operating area determines the current and voltage boundary within which the device can be operated without destructive failure. There are two SOAs: Forward Biased Safe Operating Area (FBSOA)…
Basics of Thyristor
Thyristor is a three terminal device with four layers of alternating P and N type material (three P-N junctions). The three terminals are Anode, Cathode and Gate. The Thyristor is…
