Meter Proving or Batch Operations with the Realflo Flow Computer

[Joel_Weder]

The Realflo flow computer software, which may be loaded onto a SCADAPack RTU (standard or x70 types), is able to provide Batching or meter Proving capabilities. This is configured on the Batch tab in a flow run configuration. (either Liquid or Gas)

Batching refers to measurements taken over a specific period of time. This may be done in order to transport several different products along a single pipeline, and through the same metering facility. Or it may be done for meter Proving, which is a procedure done both to ensure proper operation of a flow meter and to calibrate its output to a known external standard.

Configuration of the Batch tab is straightforward. First, the user is prompted to enter a QTR Identifier. This is the Quantity Transaction Record Identifier, used to identify the meter used as well as the historical data and information for the measured batch, as recorded in Realflo's logs.

Next, a Batch Trigger may be enabled. This typically would be required. Enabling the Batch Trigger allows the user to enter a Batch Trigger Register, which is used to start and stop the Batch or meter Prove in Realflo. A Modbus coil or status register may be used for this purpose, or a database object if in the x70 RTU. The batch starts when the input transitions ON, and ends when the input transitions to OFF.

A new Batch ID is created for each OFF -> ON transition, and the batch data is stored in the RTU's batch history records. For more detailed information on Batch operations, refer to the Realflo User Manual, in the Expert Mode Batch Operation section.

It may be necessary to write logic in the RTU to drive the Batch Trigger register. Alternately, this register may be controlled remotely from an HMI or SCADA Host application.

[Anonymous user]

Joel,

We are using the batch functionality with Realflo on a x70 SCADAPack, but the functionality is limited because there isn't a Get/Set block for all the Input Configuration registers in the x70 Logic.  Is Schneider planning on building a Get/Set block in the x70 Logic for the Realflo Input Configuration registers?  We would like to change the Base Oil Density and Base Water Density on the fly.  It would also be nice to have a Get/Set block for the Batch Configuration registers so we can change the QTR Identifier on the fly in the x70 Logic as well. 

Thanks!  

[MartinChartrand]

Hello,

There are Get and Set function blocks for AGA3, 7, 11, Liquid Water and VCone in Realflo 7 and newer. You can find reference to them here in the User Manual: Using RemoteConnect with Realflo > Realflo Derived Function Blocks.

There is no batch Get/Set functionality from what I can see but Realflo is shipped with a default RemoteConnect project that includes the Derived Function Blocks. The explanation for these DFBs is pretty straight forward and a user should be able to create their own DFB (i.e. for Batch configuration) using one of the existing DFBs as a guide.

Our support team can assist further. supportTRSS@se.com.

Realflo 7.02.1 is available here from Exchange Shop: <click here> 

Regards,

Martin Chartrand