Answer / imran mansuri

For gas and vapor flows, it is important that
no stray liquid droplets collect in the impulse lines
leading to the transmitter, incase vertical liquid
column begin to collect in those lines and generate an
error-producing pressure For liquid flows, it is
important that no gas bubbles collect in the impulse lines,
or else those bubbles may displace liquid
from the lines and thereby cause unequal vertical liquid
columns, which would (again) generate an
error-producing differential pressure.
In order to let gravity do the work of preventing these
problems, we must locate the transmitter
above the pipe for gas flow applications and below the pipe
for liquid flow applications

Answer / msn raju

Because gas want to went to atmosphere upside always and liquid always downside

Answer / r.govindasamy

gas will not condensate so txr connected above fluid
line.Butsteam line steam will be condnsate.so txr connected
below fluid line.

Answer / trideep

According to the charcter of gas in fluid mechanisam theary, it has no size and wont accumulate at the desired place/ tank if you say.. In case of liquid vice versa....

How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System

0 Answers  

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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  

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why using negative supply for bentley nevada vibration system ?

0 Answers  

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What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?

0 Answers   Kentz,

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What is the main three inputs of DCS?

1 Answers  

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why we set -10 volt in vibration sensor output,why not +10 volt

3 Answers   Sabic, TVS,

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kindly tell where orifice,nozzle,air foil,ventury used in flow measurement?

1 Answers  

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Is Hart communicator calibration device or communicating device for transmitter?

4 Answers   Yokogawa,

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How comparison of objects is done in PHP5?

1 Answers   TIS,

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What is modbus?

0 Answers  

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why we use the 4-20 mamp signal used for transmitter.

5 Answers   Tecnimont,

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Why do we need to install hook-up line differential pressure type level transmitter when the differential pressure type level transmitter with capillary are available?

2 Answers  

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