Why Boiler Drum level transmitter (TX) or level transmitter rang always put -6

Why Boiler Drum level transmitter (TX) or level transmitter
rang always put -600 to 0 other -900 to 0. Mines range why
use….?

Question Posted / fast4rohit

4 Answers
31985 Views
Uttam Sugar, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Why Boiler Drum level transmitter (TX) or level transmitter rang always put -600 to 0 other -900 t..

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.

Is This Answer Correct ?

40 Yes

17 No

Why Boiler Drum level transmitter (TX) or level transmitter rang always put -600 to 0 other -900 t..

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

Is This Answer Correct ?

23 Yes

7 No

Why Boiler Drum level transmitter (TX) or level transmitter rang always put -600 to 0 other -900 t..

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

Is This Answer Correct ?

15 Yes

5 No

Why Boiler Drum level transmitter (TX) or level transmitter rang always put -600 to 0 other -900 t..

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 This Answer Correct ?

0 Yes

9 No

Post New Answer

More Instrumentation Interview Questions

Condensation within a sight glass? Would you expect there to be more problems when using a sight glass if there is condensation on the inside or the outside of the glass, and why?

1 Answers

What is Modbus communication

0 Answers

What is the relationship between the universal gravitational constant (G) and the acceleration due to gravity (g)?

3 Answers APPSC,

what is the meaning if the control valve CV is 27,in terms of selecting procedure?

2 Answers

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

Regarding MOS (maintenance override switch), I want to know its function and its state ( 1 or 0 when not activated ). An example will be very helpful..thank you.

1 Answers

What is cable size for intrenal wiring in DCS or PLC ,from any card to Terminal amd Why

2 Answers

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

11 Answers Jindal,

What is rang ability?

0 Answers

what is the differnt between open loop and close loop ?

5 Answers India Cements,

What does a fire detector detects?

4 Answers GAIL,

What is furnace draft control?

0 Answers

For more Instrumentation Interview Questions Click Here