Answer / ramana

In boiler Drum level transmitter or level transmitter range
always put -600 to 0 other -900 to 0.Because the pressur of
LP side is always high aginst pressure of the HP side in
closed tank.

Answer / radha

this is called wet leg system,so you are telling range -600
to 0 means your drum distance between HP & LP 600 mm and HP
and LP legs both are filled with condensate(water)
continueosly but LP leg distance higher than the HP leg,so
LP side pressure will acting 600mmWC extra, compare with HP
leg pressure,so we have to eliminate that pressure LP
pressure 600mmWC
thats why -600mmWC = 4mA
0 mmWC = 20mA

Answer / automatic

the negative value used for wet leg level transmitter that
means, you have the HP side filled with a reference liquid,
a initialy you should entre the pressure value of this side
in considiration that's why when we isolate the transmitter
from the vessel we never drain the HP leg

Answer / mavdiyaamit@gmail.com

I allways -600 to 0 range is used because maximum vacuum pressure ranhe is -760 mmHg so not use in -900 to 0

is fan is a transducer or inverse transducer?

5 Answers  

---

Explain the mechanism behind the turbine meter.

0 Answers  

---

For a diafhram 1.5 d =kn(p-p0) D4 Where d in deflection in inch k=constant n=no of capdule (P-P0)=Applied pressure in psi D In active dia at capsule. -1.5 d=k to p d being constant -1.5

0 Answers   L&T, Shiv Tech Marine Control,

---

installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

0 Answers   BARC,

---

What is mean by trim?

5 Answers  

---

we have level transmitter for h2s04 storage tank capacity 10k ,always there are failure of transmitter due to failure of magnetic floats ,please come up with solutions at the earliest.

0 Answers   TechNova,

---

1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC

0 Answers   IOCL, Lakshmi Machine Works,

---

why we are using drum level control valve air to close?

0 Answers  

---

Ohm’s law, kirchoff’s law, pascal’s law, Bernoulli’s therem,

1 Answers   CCIE, Emcure,

---

DC motor and DC Drives working funda?

1 Answers  

---

what is the importance of CV in the control valves? how it is calculated?

0 Answers  

---

how can i calibrate a smart temperature transmitter used by druck 720 process calibrator?

0 Answers   Texas,

---