Hi All
We are using Foxboro Differential Pressure Transmitters IDP10 as level controls on accumulator / surge vessels on Ammonia.
We have followed the instructions supplied and what we could get off the Net but are having problems with the readout.
The problems are with the controls that sit below the liquid level of the vessels.
We are using the low entry point on the control column as minimum level and the high entry point as the maximum level.
Referring to the info in the Universal Instruction Manual we are using the instructions for a transmitter connected to a closed tank with a dry leg.
We have measured the distance between the entry points and this is our range 0% to 100%, X and multiplied by the SG of NH3.
There are 2 or 3 sight glasses on the columns and we have calculated the % level of these glasses.
We have measured from the lower entry point to the transmitter this is our Lower Range Value (LRV) Y and multiplied by the SG of NH3.
We have added X and Y to get our Upper Range Value (URV).
Once all the has been inputted the readout on the control does not correspond with the calculated levels at the sight glasses.
We have tried several different setting but with no success:confused:.
Has anyone had experience with these controls and if possible point out what we are doing wrong.
Any assistance will be greatly appreciated as supplier has not been able to help![]()
.
Regards
Paul
We are using Foxboro Differential Pressure Transmitters IDP10 as level controls on accumulator / surge vessels on Ammonia.
We have followed the instructions supplied and what we could get off the Net but are having problems with the readout.
The problems are with the controls that sit below the liquid level of the vessels.
We are using the low entry point on the control column as minimum level and the high entry point as the maximum level.
Referring to the info in the Universal Instruction Manual we are using the instructions for a transmitter connected to a closed tank with a dry leg.
We have measured the distance between the entry points and this is our range 0% to 100%, X and multiplied by the SG of NH3.
There are 2 or 3 sight glasses on the columns and we have calculated the % level of these glasses.
We have measured from the lower entry point to the transmitter this is our Lower Range Value (LRV) Y and multiplied by the SG of NH3.
We have added X and Y to get our Upper Range Value (URV).
Once all the has been inputted the readout on the control does not correspond with the calculated levels at the sight glasses.
We have tried several different setting but with no success:confused:.
Has anyone had experience with these controls and if possible point out what we are doing wrong.
Any assistance will be greatly appreciated as supplier has not been able to help
.Regards
Paul