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

Hi, I am Newely Joined in Construction company instrument engineer? Any one can Plz tell me How can I advanced preparation for Releated Engineering and construction Documents?

0 Answers  

---

Make a ladder diagram on LSL valve will close, on PSL valve will open and start the motor

0 Answers   CCIE,

---

why we connect digital multimeter in series for dc current measurement and parallel for dc voltage measurement.

4 Answers  

---

How to calibrate the control valve.

1 Answers  

---

How to calculate P,I&D value in PID controller ?

0 Answers   Jindal Steel and Power, SAL Steel Power,

---

Punj lloyd is coming in our Jadavpur Universtiy campus for campus placement. Please send me some hints about the writtend exam. My email id is subratafriends@gmail.com

0 Answers   IGL, Punj Lloyd Ltd, Shapoorji Pallonji Group(SPCL),

---

what is the reason for flow fluctuations happen on differential flow transmitter during in service

2 Answers  

---

Is that Speed Probe and Vibration Probe sensors are same,if yes what is the diff b/w them?

2 Answers  

---

what is solenoid valve?

1 Answers  

---

Which tank weighing system is better to install (Accuracy point of view) 1) Tank weighing system with 3 load cell or 2) Tank weighing system with 4 Load cell

0 Answers  

---

What are the types of valves?

0 Answers  

---

we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

0 Answers  

---