Answer / jspatel

One should confirm whether it is isolated and drained

Answer / ahmedallam

verify the instrument with technical data sheet and spec

Answer / fazil

one should have work permit..operator will control the signal manually.. close primary valve and manifold also
drain existing liquid or gas by drain plug.

remove termination and glanding also tape it to avoid short.then you can remove instruments

what is datum line?

4 Answers  

---

please explain about actuator action? direct action & return action ?

1 Answers  

---

Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

0 Answers  

---

what is see back effect?

9 Answers  

---

what is compensation? temprature & pressure

0 Answers  

---

---

Is there’s power on the bus (if so, state whether on the signal bus, or on a separate in the following: a) HART b) Profibus DP c) Profibus PA d) DeviceNet e) Foundation Fieldbus

1 Answers   EIT,

---

what is the advantage by using PID controller than P& PID?

1 Answers  

---

how many types of preheaters are in cement industry & what r they can any body explain?

0 Answers  

---

what is field bus system. need defination

3 Answers   Takreer,

---

why we used for range in pnumatic 3-15 psi and current 4-20 ma?

11 Answers   Jindal,

---

How many ohms are required for proper earthing?

0 Answers  

---

Dear all... I have 1 0-400 duplex type RTD, I connected the A side to the temperature indicator and B side to the PLC panel, but when I have observed then found that The PLC side temp has the variation. and it was distub to other RTD temp also. so what can I do.

1 Answers  

---