COMPLIANCE INFO_1998-2003 - Laserfiche WebLink

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PLC-5000 Site Controller, LD-2000 and LD-2000 PLC Leak Detector Node The Leak Detector Node (LDN) monitors pressure in the fuel distribution lines. The CCN uses this information to calculate leak rates. If the mechanical leak detector fails to achieve full flow, the CCN will issue a command to the LDN to shutdown the turbine. The LDN also monitors optional sump and interstitial sensors for the presence of liquids. Single point, dual point, and discriminating sensors from various vendors may be used with this system. The LDN is designed to communicate over the 115/230 VAC single or multi phase mains providing power to the turbine. In a specified wiring configuration, this node can operate with FE Petro variable speed turbines. In addition to the features outlined above, the LDN provides the following capabilities: • Change of sensor status reported, including connect and disconnect. • Node packaged in a watertight and explosion proof enclosure with watertight connectors. Dispenser Monitor Node The Dispenser Monitor Node (DMN) monitors a dispenser pan sensor which may be of the discriminating type. The DMN is also capable of enabling/disabling the dispenser solenoid upon direction from the CCN. This node is designed to communicate over the 115 VAC. single phase mains providing power to the DMN. The node is packaged in an explosion proof enclosure. 98 LD-2000/98 LD-2000 PLC The 98 LD-2000/98 LD-2000 PLC mechanical line leak detector is based on the original LD-2000 developed by Vaporless in 1990. The LD-2000 is a stand-alone Mechanical Line Leak Detector which does not require any electrical interface. The 98 LD-2000 is upgradable to 0.2 gal/h Monthly and 0.1 gal/h Annual line leak detection using the PLC- 5000 Site Controller interface. Features of the 98 LD-2000 include: • Drastically reduced piston size of the leak detector making for a much more responsive leak detector, significantly reducing the fuel needed to pass through the metering pin and poppet to allow full flow of the pump. • Eliminates traditional fuel flow path to the piston allowing the leak detector metering system better isolation from the turbulence and hydraulic effects found in the pump head during pump startup. This fuel flow change also eliminates the mechanical and thermal effects present in the upper half of the pump, allowing the leak detector to only respond to line pressure changes. Additionally, the new flow path allows PLC-5000 Site Controller interface to calculate and report fuel volume changes in the line. Page 7