Elster-Instromet Supervisory Systems provide total solutions for supervisory systems for all your metering applications. Typical applications are metering stations ranging from single-stream stations to stations with up to 100 streams, control systems for high-pressure calibration facilities and remote metering applications where stations are interrogated via a cellular network and data is concentrated into a central pipeline monitoring system.
A supervisory system can consist of a single supervisory computer or can be dual redundant. In the latter case, two supervisory computers operate in a hot standby configuration. For situations where multiple operator terminals are required, a true redundant client/server system is available supporting an almost unlimited number of operator terminals and web-based operator interfaces.
All supervisory systems are based on our own supervisory package ISS. ISS is more than a SCADA or DCS package. ISS has been developed specifically for gas/liquid metering applications where accurate calculations, data processing, reporting and advanced communication capabilities are of the utmost importance. ISS is based on Microsoft Excel and it therefore provides optimal numerical accuracy (up to 64-bit floating numbers) and calculation efficiency. Calculations for use specifically in metering such as ISO 6976, S-GERG, AGA8, NX-19, AGA10 and various other thermodynamical properties are part of the ISS package.
With performance monitoring, your metering system is continuously validated. If metering equipment has drifted and requires maintenance or recalibration, this will be signalled. The performance monitoring features within ISS have been developed in close cooperation with all product development specialists for products such as the Q.Sonic ultrasonic meter, EnCal 3000 gas chromatograph and Model 2000 flow computer.
An expert system can be added to the supervisory system allowing technicians to model their expertise in the expert system using a simple rule builder. This will allow operators to benefit from expert knowledge and to resolve problems more quickly.