Answer / carl_ellis

A 230Vac line voltage is converted to an instrumentation
level signal of 0-10Vdc in a converter.

That 0-10Vdc proportional signal is fed into some receiver
which re-transmits the input as a 4-20mA

signal. So now a 0-230Vac signal is a 4-20mA signal.

It isn't clear why the signal was not initially converted to
4-20mA, but that way things are, sometimes.

Carl Ellis
Measure First

How to Calibrate Ultrasonic flow Transmitter in Field

0 Answers  

---

please send me gail format if u have... please help me if u can...

1 Answers  

---

What is the main difference between Cavitation and Flashing?

1 Answers  

---

why use MMWC unit

9 Answers   Praxair, Saipem,

---

Do you have reference list?

0 Answers  

---

Tell me about PID Tuning and what is PID.

4 Answers  

---

In E&I diagram what is the meaning of rectangular box and circular box

3 Answers   L&T,

---

What are the most frequent problem faces with Vortex flow meter?

1 Answers  

---

what are the steps to follow force a particular input or out put from ics triplex esd system?

1 Answers  

---

HI, can anybody give details about GAS TREATMENT PLANT CONSTRUCTION,as INSTRUMENTATION ENGINEER what are the responsibilites.what are the instruments mainly instrumentation engineer will deal with

0 Answers   GSM, IOCL,

---

I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea

3 Answers  

---

In most instances, Inertia processes are quite uncommon. Give an example of a combined Resistance and Capacitance situation.Describe an application, which according to your understanding of the subject matter, comprises of both Resistance and Capacitance effects.

0 Answers  

---