To find closed tank level by DP transmitter , how to
findout its range.and insomeplace they using range like -
1500 to +1500 mmwc why not 0 to 3000 mmwc. how they spilit
they range for minus and plus.and why?
Answer / yashwant
THIS IS LEVEL MEASUREMENT USING DP TRANSMITTER, CLOSE TANK
MEANS PRESSURIZED ,PRESSURE IS EVERY WHERE IN SIDE TANK WILL
BE SAME. LOW SIDE WILL BE TOP SIDE WHERE ALL CONDENSATE
COLLECTED THIS IS REFERENCE SIDE, NOW ON OTHER HAND HIGH
SIDE WILL BE LOWER, DIFFERENTIAL PRESSURE OBSERVED AT DPT.
LOWER SIDE WILL BE ALWAYS FULL IE FULL SCALE IF YOU ARE
HAVING TANK HEIGHT 1500 MM THEN PRESSURE AT LOWER SIDE IS
1500 MMWC. AND THAT OF HIGHER SIDE WILL BE THE ACTUAL WATER
INSIDE TANK WE SAY 500 MMWC STEAM PRESSURE WILL BE EVERY
WHERE SAME SO NO NEED TO CONSIDER PRESSURE INSIDE THE TANK.
MINUS AND PLUS WILL BE JUST FOR HAVING DIFFERENCE IN TWO
COLUMN IE HP AND LP. ALSO TANK IS NOT PRESSURIZED YOU CAN
USE PRESSURE TRANSMITTER CALIBRATED IN YOUR RANGE (HEIGHT OF
TANK MMWC)
Is This Answer Correct ? | 6 Yes | 4 No |
Name four general (not technical) criteria that would you consider important, when deciding upon a particular control valve?
what is the diffrence between mmwc and kg/cm2 for pressure measurment when we are using mmwc and when kg/cm2 and why????? ?? what is the reason
19 Answers Ecoboard, Jindal, Sepco,
difference between null and deflecting instrument.
What is the difference between PLC and DCS?
Why the Proximitor supply should be Negative voltage? Why should not we give Positive voltage to the Transducer?
What for barriers are used in DCS & PLC systems?
How does a strain gauge measure pressure?
Can we use mov instead of esdv Explain the reason
WHAT IS DIFFERANCE BETWEEN INSTRUMENT AND EQUIPMENT
in the boiler in the main steam line and its bypass line and the startup vent vales are only motorised valves why cant we use other types of valves such as pneumatic.
how to convert cubic metre per hour to newton cubic metre per hour
If the vibration probe near to the shaft,then output voltage will be decreased r increased?How?