My rtd working well at the same time r/i converter is not working properly.when

My rtd working well at the same time r/i converter is not working properly.when power is given to rtd..it is giving 30mA and getting 2.4 mA if i remove the compensate leads No matter how many ohms.why it is happening like so?what is the solution?rtd range-0-200deg c& 4-20 mA o/p.please give me solutiin anyone......

Question Posted / vijaymallepu74

1 Answers
4282 Views
I also Faced
E-Mail Answers

My rtd working well at the same time r/i converter is not working properly.when power is given to rt..

Answer / carl_ellis

Any 2 wire, loop powered 4-20mA transmitter that puts out
30mA is broken. The only transmitter that puts out 30mA is
a legacy 10-50mA transmitter from 20-30 years ago.

While the upper end of the 4-20mA signal range is 20.0mA,
most 2 wire, loop powered transmitters allow for some slight
signal over-range, typically 20.5mA.

NAMUR standards use 21.0 mA to signal a fault or failure
mode. Other vendors use other values, 20.8mA, 21.2mA or
some value in the range of 21mA. But no vendor uses 30mA
as a fault mode.

The transmitter is broken or dysfunctional.

Carl Ellis
Measure First

Is This Answer Correct ?

5 Yes

0 No

Post New Answer

More Instrumentation Interview Questions

How does SmartPlant Instrumentation interface with physical design (3D modeling)?

0 Answers

how to use level tranasmitter in closed tank application.?

3 Answers Dalkia,

why micro controller 8051/52's clock frequency is internally divide by 12 ?? and why it is further divide by 32 in UART serial communication ??

1 Answers

Why is it necessary to use compensation leg to measure the liquid level in a closed or pressurized tank?

0 Answers

What is BMS (Building Managment System)& is AHU / HVAC are in BMS.

12 Answers Alghanim,

What is Cavitation?

2 Answers Gujarat Borosil,

what is the difference between auto tuning and manual tuning of controllers(eg:PID,PI,PD CONTROLLERS )

2 Answers GATE,

Absolute pressure is 700psi,what will be the gauge pressure?

1 Answers IFFCO,

Why mmwc unit is used?

0 Answers

pls any1 sugges me book for plc,dcs & scada..

1 Answers

If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?

1 Answers Process Control Technologies,

why we use cascade control and feed forward control in 3 element drum level control measurement of steam drum .what is cascade and feed forward control system ?give example .

0 Answers Visa Steel,

For more Instrumentation Interview Questions Click Here