2/27/2014 1:49 PM | |
Joined: 1/2/2013 Last visit: 9/27/2024 Posts: 38 Rating: (4)
|
Hello Nicer,Attached please find the part of our catalog describing flow measurements with a differential pressure transmitter. You will need an orifice plate tailor made for your application. If an orifice and the calculation for the same is not available you will have to refer to the technical support of SIEMENS. You will receive a questionary which is to be filled out so we can provide a suitable solution. Link to the Support Request: http://support.automation.siemens.com/WW/llisapi.dll?aktprim=99&lang=en&referer=%2fWW%2f&func=cslib.csinfo2&siteid=csius&extranet=standard&viewreg=WW&groupid=4000002About your questions:I assume you are dealing with a HART device SITRANS DSIII 7MF4433-*In this case you have to set the application switch to flow. This includes already the Square Root Function.The current output transfer function must be set to “linear”. Otherwise you will have the Square Root Function twice and a wrong result at the output. The pressure value will of course be the differential pressure but the output current will represent the flow.There is no "area" requirement on the SITRANS parameter.The attachment includes a picture of the relationship between the flow and the differential pressure. It is a square root relation and will be calculated exactly like this by SITRANS DSIII. Feel free to come back for more information. AttachmentD:\Siemens\Katalog\Katalog_alt\2014\FI01_en_kap03 orifice plate.pdf (561 Downloads) |
This contribution was helpful to1 thankful Users |
2/28/2014 5:16 AM | |
Joined: 3/28/2010 Last visit: 11/30/2024 Posts: 1090 Rating: (215) |
What is a piezometer? |
Follow us on