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How to do 4-20mA Conversions Easily

S Bharadwaj Reddy
Generally it is possible to generate a “custom” linear equation in the form of y = mx + b for any linear responding instrument relating input directly to output, a more general...

Example of 3-15 psi to 4-20mA Conversion

S Bharadwaj Reddy
A current-to-pressure transducer is  used  to  convert  a  4-20 mA  electronic  signal  into  a  3-15 PSI pneumatic signal. This particular transducer is configured  for  reverse action instead  of direct, meaning...

4-20mA Formulas and Examples

S Bharadwaj Reddy
4-20 mA transmitter current output can be converted to the voltage within a specified range, from 0 to a maximal amplitude Vmax, as shown in the following picture: 4-20mA Formulas  Calling I...

How a 4-20mA Transmitter Works ?

S Bharadwaj Reddy
A sensor is an input device that provides a usable output in response to the input measurand. A sensor is also commonly called a sensing element, primary sensor, or primary detector....

History of 3-15 psi, 10-15 mA, and 4-20 mA signals

S Bharadwaj Reddy
Before 4-20 mA the signals were 3-15 psi and 10-50 mA. These signals all have a “live zero” (3 psi, 10 mA, and 4 mA) rather than a “dead zero”...

Formula to Calculate Process Variable from 4-20mA

S Bharadwaj Reddy
How to Calculate Process Variable from 4-20mA current loop output of a field transmitter. Check the formula to find out Process variable (PV). Calculate Process Variable from 4-20mA   Formula...

Formula to Calculate 4-20 mA from Process Variable

S Bharadwaj Reddy
How to Calculate 4-20mA current loop from Process Variable value of a field transmitter. Check the formula to find out equivalent 4-20mA signal from Process Variable. Calculate 4-20mA from Process Variable Formula :...

4-20mA Graphical Calculations

S Bharadwaj Reddy
An illustration sometimes find helpful in understanding analog signal ranges is to consider the signal range as a length expressed on a number line. 4-20mA Graphical Calculations For example, the common...

Formula to Calculate 3-15psi from 4-20mA Current

S Bharadwaj Reddy
The amount of psi can also be calculated from the amount of the milliamp signal, or one can calculate the amount of the milliamp signal when the amount of psi is known. Each of...

Calculate Process Variable from Transmitter Current

S Bharadwaj Reddy
A pH transmitter has a calibrated  range  of 4 pH to 10 pH, with a 4-20 mA output  signal. Calculate the pH sensed by the transmitter if its output signal...

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