Explain, and give a real-world example of MODULATING control

1 Answers  

---

Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

0 Answers  

---

the whole paper was based on Transducers..questions like define repeatability, error,accuracy,precision..den there were many q. on the conversion of Pa to mmHg and other units.. also..der wer few Q. on some level sensors(with diagram)

0 Answers   GNFC,

---

what is the PID controller?

1 Answers  

---

what is full form of NAK?

1 Answers  

---

how to work static pressure sensore how to work dpt

0 Answers  

---

What is Hysteresis mean in Instrument?

11 Answers  

---

What is the different between ESD & PLC.

1 Answers  

---

For 150 mtr cable run from DCS panel to transmitter (24 VDC with 4-20 ma output), need cable size. 1.5 sqmm is suitable?

2 Answers   NA,

---

what is the difference between SCADA and DCS?

5 Answers   ACC,

---

I HAVE GOT TYPICAL PROBLEM WITH THE TEMP.INDICATION. THE PROBLEM IS THE K-TYPE T/COUPLE OUT PUT IS CONNECTED TO A INDICATOR.THE INDICATION FLUCTUATES SOME TIMES AND SOME TIME IT IS STABLE. WHEN I CHECKED OUT PUT OF T/COUPLE THE MV WILL NOT VARY. WHERE AS INDICATION FLUCTUATES. WHEN I GIVE MV SOURCE TO T/COUPLE EXTENSIONCABLE FROM THE FIELD IT INDICATION IS STABLE. WHEN GIVE MV SORCE TO INDICATOR ITS INDICATION IS STABLE. PLEASE CLARIFY.

5 Answers  

---

why we are giving negative supply for vibration sensors?

3 Answers   Shell, Solex,

---