Formulas to calculate mA from PV, LRV and URV
The formula for calculating equivalent current (ma) from known process variable (PV), Lower range value (LRV) and Upper range value (URV). Formula to calculate mA from PV The formula is:…
DP Transmitter with Two Seals applications
DP Transmitters with remote seals allow the transmitter to be removed from direct contact with the process fluid. Remote seals are useful when: 1. The process temperature is outside of…
Density Measurement using DP Transmitter for closed tank with wet leg
In closed tanks, the DP transmitter must compensate for the pressure of the vessel above the liquid surface. So the LP side of transmitter is connected to the tank. Here in this…
Closed tank Density Measurement using DP Transmitter with dry leg & constant level application
In closed tanks, the DP transmitter must compensate for the pressure of the vessel above the liquid surface. So the LP side of transmitter is connected to the tank. Here in this…
Density Measurement for Open Tank with Constant Level Application
In open tank applications, the level can be measured with either gauge or differential pressure (DP) transmitters, using the assumption that P = LS. If specific gravity needs to be…
Interface Level Measurement using DP Transmitter
Differential pressure (DP) transmitters are used to measure the interface of two fluids that have different specific gravities (S1 & S2). To make an interface measurement, the overall level must…
Displacer Level Transmitter Questions
Displacer Level Transmitter Question : Determine a basic 5-point (0%, 25%, 50%, 75%, and 100%) calibration table for the displacer level transmitter in this scenario: The cylindrical displacer weighs 9…
Flow Transmitter Rangeability
Flow Transmitter Rangeability is usually defined as the ratio of maximum flow to minimum flow the transmitter or sensor can measure.
Special Purpose Diodes Interview Questions & Answers
1. Explain what is a zener diode? Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. 2. Explain what is…
Convert 4-20ma current output to foundation fieldbus
Here we are discussing about how to convert smart transmitter HART type output current 4-20ma into foundation fieldbus signal. The block diagram for connecting smart transmitter to FF device. Terminal…
