For the closed tank with DP transmitter and dry impulse example, if there's no pressure contribution at the low port side of the differential pressure transmitter, then why don't u leave it opened to air, just like how it's done in the open tank measurement
Hello James Thanks for asking this question. In closed tank level measurement, we need to consider height of dry impulse line, when we do LRV calculation of dpt. Therefore, we can't leave it opened to air
Here HP tapping point is below the tank.So,why didn’t add the H1 value in 0% calculation.Why did to put the 0 value.Then why didn’t you add the H1+H2 value in 100% calculation of Hp side.please explain
Thanks for asking this question. In this example, bubble pipe is connected to HP Side Of transmitter, and it apply constant pressure to high side. So, this is a reason height of transmitter does not affect level measurement in this case. I hope you got ur answer
For the closed tank with DP transmitter and dry impulse example, if there's no pressure contribution at the low port side of the differential pressure transmitter, then why don't u leave it opened to air, just like how it's done in the open tank measurement
Hello James
Thanks for asking this question.
In closed tank level measurement, we need to consider height of dry impulse line, when we do LRV calculation of dpt. Therefore, we can't leave it opened to air
If you want to learn more about process measurement. Please refer following link.
amzn.to/3MEPc6k
Here HP tapping point is below the tank.So,why didn’t add the H1 value in 0% calculation.Why did to put the 0 value.Then why didn’t you add the H1+H2 value in 100% calculation of Hp side.please explain
Thanks for asking this question. In this example, bubble pipe is connected to HP Side Of transmitter, and it apply constant pressure to high side. So, this is a reason height of transmitter does not affect level measurement in this case. I hope you got ur answer
@@InstrumentCalibration Thanks for your reply