Answer / m m chotrani

If you have got the height. Now Pressure = h x d x g

You have h, g is same inside the equipment.
You should get the density of the liquid whose level you
want to measure. suppose you are measuring level from 0 to
100%.your height is say 2000 mm and density is 1.3gm/cc
then P = h x d = 2000 x 1.3 = 2600mm.
Transmitter range will be 2600mm of water column.

Simply multiply height with density to get it in water
column.

Answer / s. kanniyappan

In case of Dry Leg
Span = (X)(Gl)
Hw at minimum level = (Z)(Gs)+(Y)(Gl)
Hw at maximum level = (Z)(Gs)+(X+Y)(Gl)

In case of Wet Leg
Span = (X)(Gl)
Hw at minimum level = (Y)(Gl)-(d)(Gs)
Hw at maximum level = (X+Y)(Gl)-(d)(Gs)

Gl=Specific gravity of tank liquid
Gs=Specific gravity of seal liquid
Hw=Equivalent head of Water
X=Max level
Y=Min level
Z=Distance b/w Datum and Transmitter.

Tyes of interface level measurement and how to use that technique for interface level measurement,

0 Answers  

---

i need some objective type questions in instrumentation

0 Answers  

---

Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

---

Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...

0 Answers   Adgas, GAIL, Oil India, ONGC,

---

What pressure transmitter.

1 Answers  

---

how to calibrate differential pressure switch

2 Answers  

---

what is droop in governer ,type of droop ,how it work

0 Answers   TATA,

---

Can we use PLC in Hazardous Area?

2 Answers   MNHG,

---

we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

0 Answers  

---

Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?

2 Answers   SCS,

---

why we are using magnet for calibration of gas detector?

0 Answers   NSH,

---

hello can yoy pls send me previous papers of jindalpower and steel ltd.....'m from instrumentation..... mani1048@gmail.com

0 Answers  

---