generally transmitter power supply having some range(12v to 35v) but the

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 ?

Question Posted / nilpatel4@yahoo.com

1 Answers
3839 Views
I also Faced
E-Mail Answers

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) mus..

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
INSTRUMENTATION ENGINEER

Is This Answer Correct ?

10 Yes

1 No

Post New Answer

More Instrumentation Interview Questions

for oil & gas industries which zone is normally preferred? why? give its example?

0 Answers

can we create an interrupt in plc through scada?

0 Answers Glensol, TATA,

what is the difference between attemperator and desuperheater ?

0 Answers

How to convert milliampares into flow??

0 Answers

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

4 Answers

what is flow and flowrate? definate and diffrentiate it? pls post a valid ans thanks in advance

2 Answers Qatar Gas,

what is thermopile?

1 Answers HNG,

NPN transistor, SCR, Zener diode, LED, Varactor diode, Vortex meter, RTD, Resistor, Crystal

0 Answers CCIE, RTD,

what is diffrence between analog card and digital card in plc.how analog card work,Please explain in detail.Please send it on abhi_vyas@sify.com

6 Answers

What are the different modes of a contollogix family processor? How they work?

3 Answers Honeywell, Siemens,

how to check diode wheather it is working or not by using multimeter?

3 Answers

How we are deciding while programming in pid controller , What we are using heating or cooling.

1 Answers

For more Instrumentation Interview Questions Click Here