Types of Control Valve Trim
What is the Trim? The internal parts of the valve body, stem, seating material, package, disc, plug, back rings, etc., are collectively referred to as the trim. In other words,…
How to Reduce Relay Noise in PLC Systems?
Today we are going to discuss about Relay Noise reduction method for a PLC system. we observe more noise is generating by relay output switching.
What is a Dead Weight Tester?
A dead weight tester is an instrument that calibrates pressure by determining the weight of force divided by the area the force is applied. The formula for dead weight testers…
What is RTD Sensitivity ?
The RTD is a temperature sensitive resistance. So an indication of its “sensitivity” should indicate the amount to which the resistance changes as temperature changes. Some discussions of RTD sensitivity…
Thermowell Wake Frequency Calculation
What is a Thermowell Wake Frequency Calculation? A Wake Frequency Calculation is used to determine or prove the required dimensions and suitability of a Thermowell based on the process conditions.…
Thermocouple / RTD Calculator
Temperature Calculator software is based on the conversion tables and calculation as per ITS-90. This software is used to convert the Emf (mV)/Ohms generated by thermocouple & RTD to the…
What is RTD Accuracy ?
The practical accuracy of an RTD will depend on the tolerance of the RTD, the measurement temperature, the accuracy of the mating instrument, and the effects of the interconnecting lead…
Effect of Lead Wire Resistance on RTD
RTDs generally use copper leads bonded to the platinum element. These leads normally connect close to the element and close to each other (so that both junctions will be at…
Types of Control Valves
Control valves are available in different types and shapes. They can be classified in different ways; based on: (a) action, (b) number of plugs, and (c) flow characteristics. (a) Types…
PLC Output Types
PLC outputs are of two types: 1. Relay. 2. Solid state. Relay outputs are mechanical contacts and Solid State outputs are like transistor, TRIAC.
