Electronic custody transfer of hazardous liquids

Flow Measurement & Control

May 2007 Flow Measurement & Control

The EMR³ electronic custody transfer meter from Veeder Root can replace all commonly used mechanical counters. It can be used for both mobile and static metering systems, attached directly to the meter or installed remotely. Applications need not be limited to positive displacement (PD) meters with mechanical registers, as the unit has been successfully integrated to turbine, mass and magnetic flowmeters.

The system provides multiple meter calibrations thereby eliminating meter slippage. This also results in improved overall accuracy regardless of the flow rate. Additionally, older worn meters can remain in service for extended periods without requiring to be rebuilt.

"The resulting savings contribute to realistic ownership costs and total control of one's fuel dispensing requirements," says Mark Louw of local distributor, Meter Systems Imex.

The EMR³ system uses Atex (equipment intended for use in potentially explosive atmospheres) proven design and comprises two parts, namely: a display unit that can be placed in the hazardous area, and the interconnect box (IB) that is located in the safe area.

The EMR³ electronic custody transfer meter from Veeder Root

The display, or meter register incorporates four individual fields for:

* Totaliser.

* Preset (volume and/or the price).

* Register (total gross and nett).

* Serial output to the ticket printer.

Digital valve outputs from the EMR³ are relayed through the IB.

The system also accommodates temperature compensated dispensing for custody transfer applications displaying both gross and nett volumes. Preset volumes can be made in gross and dispensed in nett or visa-versa. A scaled volumetric pulse to control additive injection, blending systems or a remote display is available from the IB as standard.

The unit is suitable for use in explosive environments

Transactions are stored to non-volatile memory and can be printed on demand or with each dispensing operation to a local or remote printer. Bill of Lading (BOL) information is configurable to suit the vehicle or gantry installation as follows: time and date, volume dispensed (gross and nett including start and end totals), average flow rate, average temperature, coefficient of expansion, corrected volume, meter ID, product loaded and ticket number.

A serial communications port is available to link the EMR³ to gantry automation software. Multiple electronic heads can communicate to gantry automation software (or DCS) by multidropping to the RS485 serial communications port on each unit. The EMR³ allows total control of loading functions including preset volumes, pump start, earthing and arm position permissives and additives required.

Applications include: bulk fuel deliveries to forecourts, farmers and bulk end users, aviation refuelling, bunkering fuels and chemicals.

For more information contact Mark Louw, Meter Systems Imex, +27 (0)11 923 7184, [email protected], www.metersystems.co.za

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Flow Measurement & Control

Electronic custody transfer of hazardous liquids

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