Answer / guest

1.Fix the transmitter on the process line and connect the
power supply.
2.Connect the impulse line to the transmitter.
3.Ensure level transmitter HP and LP main isolation valve
is closed.
4.Open the HP and LP valve and close the equiliser valve to
the transmitter.
5.Close the vent plug to the transmitter.
6.fill the water (condensate pot via) on LP side of the
transmittre impulse line.
7.Ensure transmitter display showing is zero.
8.If not showing zero,release the air lock (vent plug via).
9.Open the HP and LP main isolation valve.
10.Ensure the level transmitter working is normal.

Controller not working in auto mode?...what are the problem can occur...Pls explain

1 Answers   Aramco,

---

What is the logic a Transmitter control a Control Valve? How the signal going to the Control valve? What are systems/Panels/cables/signal used to control valve from Transmitter?

3 Answers  

---

How to Calibrate Temperature Switch in field

0 Answers  

---

What is Erosion in a control valve?

0 Answers   CCIE, Fisher,

---

how to check diode wheather it is working or not by using multimeter?

3 Answers  

---

Why we are using temperature and pressure as a reference when measuring flow of steam?

4 Answers   Shell,

---

how can we calibrate RADAR LEVEL transmitter 0% to 100%

3 Answers   Chevron Phillips, Honeywell,

---

in control valve is constructed as per API 6D or API 6A, then which standard is used for fire testing of valve?.

1 Answers  

---

radial & axial vibration sensor output voltage is ac or dc volt?

8 Answers   Vedanta, Voltech,

---

What is the difference between bench set and operating range i control valve?

1 Answers   Descon,

---

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2 Answers   Gujarat Fluorochemicals Limited (GFL), Shell,

---

what is the formula for changing Range of Transmitter from X mmwc to some Y mmwc with respect to DCS NCMH flow range from x NCMH to y NCMH?

1 Answers   HCL,

---