generally transmitter power supply having some range(12v to
35v) but the out put(4-20 mA) must same for given input.If
we vary the power supply voltage then output mA also to be
change according to V=IR. Is there any voltage regulator
in the transmitter ?
Answer / rakesh kumar n
My point of view is
-->12V to 35V is given as Power supply, this is given
because to switch on the transmitter
-->4 to 20mA is produced depends upon the pressure and flow
applied on the transmitter and it is given to the
microprocessor and it convert it into mA
-->Then the 4 to 20mA is converted into 1 to 5V using 250
Ohm Resistance and is given to DCS.
-->The main thing for using mA is, there won't be any
wastage in Current, but if you use V,there will be voltage
drop due to cables.
Thank you
Rakesh Kumar.N
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