Answer / deepan

basic principle behind that is conductivity or resistivity.
pure steam has conductivity 0.9 mho
dm water has 1.0 mho
so hydrastep gives different color

Answer / d.chakraborty

FOLLOW - www.powerplantinstrumentation.yolasite.com

when a magnet is heated?

0 Answers  

---

Where we cant instal mass flow meter.

1 Answers  

---

If we increase D what will be the controller action?

2 Answers  

---

Can we calibrate an actuator?

5 Answers   Siemens,

---

what is consistency transmitter and describe its working?

1 Answers   Emami,

---

---

Can anyone send most commonley asked Instrumentation questions and answers in cement industry please?

0 Answers  

---

Flow tax range 0 to 100 mmh2o ,flow rate 40 tons /hr, I want change flow rate example 42 tons/hr so tx range ?

2 Answers  

---

what is the difference between PLC & DCS

17 Answers   L&T,

---

A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

0 Answers   MNC,

---

pls tell me whethere flame proof HMI's are available or every HMI is manufactured by considering flame proof standard.

3 Answers  

---

Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com

0 Answers  

---

What is rtd output signal

4 Answers   Nestle,

---