Description

Gas & Liquid Flow Computer for SLC

MVI46-AFC

The MVI46 Gas and Liquid Flow Computer Module is an SLC backplane compatible module that allows SLC processors to easily support flow applications with 8 meter runs performing measurement of hydrocarbon gases or liquids using AGA 3, 7, 8 and API MPMS Chapters 11 and 12 measurement standards.

 

Features and Benefits

The MVI46-AFC is an in-rack Gas and Liquid Flow Computer Module for the SLC platform. The MVI46-AFC Flow Computer module supports 8 meter channels for the measurement of hydrocarbon gases and liquids using currently accepted industry measurement standards.The module calculates flow rates, accumulated volumes, accumulated mass and accumulated energy (heating value). The calculation results are transferred back to the Processor memory for use in the application ladder program or for transfer back to a SCADA host.

 

 

AFC Version 2.05 Update Notice

If your module measures liquids, please read this notice before upgrading from version 2.04 (or earlier) to 2.05 (or later).

For compliance with new measurement standards, the AFC version 2.05 has introduced several new liquid product groups. In particular, the two non-refined liquid product groups of version 2.04, which covered the entire density range of crudes and NGLs, have each been split into two separate product groups, one for the higher density range of crudes and the other for the lower density range of NGLs. If your module has meter channels configured for either “Crude, NGL” or “Oil-water emulsion”, you should decide before upgrading the firmware the new product group (light or heavy) to which each such channel should be assigned.

This assignment will be performed during the upgrade process and will preserve all other configuration and historical records including accumulator values and archives, in contrast to changing a product group after the upgrade which resets the meter configuration and erases all historical records. Meter channels configured for “Gas” or “Refined products” are not affected.AFC Manager exhibits the same behavior when converting a project between versions 2.04 (or earlier) and 2.05 (or later).The criterion for assigning the new product group depends on the density units and the Default Reference Density, as detailed in the following tables: Density Units = kg/m3

 

Version 2.04 Product Group	Default Reference Density	Version 2.05 Product Group
Crude, NGL	= 0 OR >= 610.0	Crude oils, JP4
Crude, NGL	> 0 AND < 610.0	NGLs, LPGs
Oil Water Emulsion	= 0 OR >= 610.0	Oil-water emulsion (Crd)
Oil Water Emulsion	> 0 AND < 610.0	Oil-water emulsion (NGL)

Density Units = Rd/60

Version 2.04 Product Group	Default Reference Density	Version 2.05 Product Group
Crude, NGL	= 0 OR >= 0.6100	Crude oils, JP4
Crude, NGL	> 0 AND < 0.6100	NGLs, LPGs
Oil Water Emulsion	= 0 OR >= 0.6100	Oil-water emulsion (Crd)
Oil Water Emulsion	> 0 AND < 0.6100	Oil-water emulsion (NGL)

 

Due to roundoff error of numeric conversions, a Relative Density very close to the cutoff value of 0.6100 may cause the module to assign the new product group opposite to the one that was intended. Before upgrading, change the Default Reference Density to a number significantly different from 0.6100, such as 0.6110 (to target Crude) or 0.6090 (to target NGLs). You may change it back to the correct value after the upgrade

 

Density Units = API Gravity

Version 2.04 Product Group	Default Reference Density	Version 2.05 Product Group
Crude, NGL	= 0 OR <= 100.0	Crude oils, JP4
Crude, NGL	> 0 AND > 100.0	NGLs, LPGs
Oil Water Emulsion	= 0 OR <= 100.0	Oil-water emulsion (Crd)
Oil Water Emulsion	> 0 AND > 100.0	Oil-water emulsion (NGL)

 

Applications

The MVI46-AFC module is the ideal solution for the many applications where hydrocarbon flow and SCADA communication must be added to the SLC platform.

Applications using the MVI46-AFC module can be found mainly in the oil and gas industrial sectors.

 

Specifications

•  Single Slot – 1746 backplane compatible (Local or extended I/O rack only. Remote rack not supported)
•  The module is recognized as an Input/Output module and has access to processor memory for data transfer between processor and module using M0/M1 files
•  Ladder Logic is used for data transfer between module and processor. Sample ladder file included
•  Configuration data obtained from configuration text file downloaded to module. Sample configuration file included

 

 

NOTE:  All products are pre-order items

Specifications, downloads & certifications