Answer / carl_ellis

The DP pressure/flow transmitter is mounted above the pipe
for gas applications (empty impulse tubing).

The DP pressure/flow transmitter is mounted below the pipe
for liquid applications (liquid filled impulse tubing)

Steam flow applications using DP pressure transmitters were
historically mounted below-the-pipe (water filled impulse
tubing, frequently with condensate/seal pots), until
Emerson/Rosemount recently discovered that within certain
temperature limits, a DP transmitter close coupled on a
coplanar manifold to an Annubar averaging pitot tube can
survive steam temperatures mounted above-the-pipe.

See this link for Emerson's white paper on steam service
installation recommendations:
http://www2.emersonprocess.com/siteadmincenter/PM%
20Rosemount%20Documents/00870-0200-4809.pdf

Carl Ellis
Measure First

1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

0 Answers  

---

Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 Answers  

---

suggest a sensor to measure rapidly varying temperature?

1 Answers  

---

How does SmartPlant Instrumentation interface with physical design (3D modeling)?

0 Answers  

---

Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability

0 Answers  

---

hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???

0 Answers  

---

with the help of suitable diagrams different types of control valves

1 Answers  

---

1 bar is equal to how many pound per square inch(psi)?

14 Answers   Essar,

---

I installed the smartplant instrument v8, but can not be opened, that always said: "INTools 2007 hardlock no found". So Could you help me how to do for that?

0 Answers   SRAAC,

---

what is compensation? temprature & pressure

0 Answers  

---

How we calculate orifice plat size???

0 Answers  

---

How many loops are there in the power plant? how many closed & open loop in the power plant ? Please give me the exact clarification?

2 Answers   Lanco, Reliance,

---