Answer Posted / rahul

For loop checking we are having ILD (instrument loop
drawings)as a documents. for AI we give 4-20ma and chek in
the system if accordingly raw count is coming or not.
for AO we force from the system and check in the plant if
according to raw count current is coming or not.
for ESD loop checking raw count in the system(Triconex) is
819 - 4095 i.e for 4-20ma
if there is problem is loops then we go for backward
checking i.e from system to know where is the problem.
then we do point to point checking.
after completion of loop test we go for functional test.

what is basic difference between motion balance and force balance in pneumatic instrument?

9678

---

What is limitation of the ht.of the displacer of a level trol?

2404

---

-/5A. What is the meaning and limitations of this in energy meter constant. It is a 3 phase LT Energy Meter. If this Energy Meter is connected through a CT of ratio 200/5 Amps, then what is the multiplying constant and how its will be calculated.

2467

---

what is cold loop? difference between hot and cold loop?

2247

---

why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

2235

---

what is the procedure for auto tune in masoneialn 12300 series displacer type transmitter?

1649

---

How can test or measure the probe and extension cable to identify if the problem at the probe or cable or at the driver it self? (pleast notify the measuring method)

2609

---

what is 24vdc live and dry supply

2277

---

Draw bode plot of any transfer function. Why is plotting bode necessary?

2532

---

why we are using magnet for calibration of gas detector?

2262

---

Explain the combusion chamber

2032

---

all types instrumentation questions want

2194

---

What is super thermocoupal?

2222

---

What are the application of bernoulli’s theorem?

1158

---

send me last 5 years questions asked in rrb chennai, for section engineer

2112

---