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

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 / deepak

1 Answers
4436 Views
Indian Steel, I also Faced
E-Mail Answers

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

Answer / kyle condran

Transmitters act as a current source so the voltage drop across the Tx will change anyway in order to provide the correct current out. As long as the supplied voltage is in the range of the Tx, ie enough to power the unit and drive the signal, it will not affect the signal.

Ohms law get tricky when there is a "constant" current source in the loops

Is This Answer Correct ?

7 Yes

0 No

Post New Answer

More Instrumentation Interview Questions

How to do manual mapping in radar type level transmitter?

2 Answers

in instrumentation why we are using 4-20mA , why not voltage ? if somebody design a instrument which works on voltage then can we use that instrument?

6 Answers

What is the meaning of slope in PH transmeter?

1 Answers Uttam Sugar,

applications of 1-5v and 4-20ma?

4 Answers

What is the function of a diaphagram

5 Answers

Hi, I'd like to know the purpose of MOS (maintenance override switch). At site, these switches are installed in a stanchion with the transmitter (connected to ESD). thank you.

3 Answers Adani, Adani Wilmar,

what are level of automation & how these are distinguished ?

3 Answers

who discoverd ohms law?

3 Answers HPCL,

What is the differace between Volumatric flow meter and Mass flow meter.

4 Answers Reliance,

A flange is used for instrument connection for a system with a design temperature of 316C (600F) and a design pressure of 1000 kPa (145 psi). What is the class rating of the flange to be used for this application? Explain your answer

0 Answers

What is the relationship between GAIN and PROPORTIONAL BAND.

1 Answers Kharafi National, Sabic,

In Increasing temperature why thermocouple used and RTD is not used. Both RTD and Thermocouple have in Range of uses.

5 Answers L&T,

For more Instrumentation Interview Questions Click Here