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g <br /> A <br /> i _.n.......,-wWa......c..a.,-ter._ .mss'.,. c...,._..,u..sa_n._.,.<..�...m......a...»..r....�_ �...,a...f«o.....v.. n.....a.m......7...rwr..�._.s._...�..._r.......' ..._ti,..._ __.. <br /> _ Effective Hydrostatic Monitoring Monitoringthe Tank with <br /> Systems for Xerxes Double Wall Tank Reservoir Probe <br /> Xerxes double wall tanks may be monitored with a variety of The accurate monitoring of the primary and secondary tank <br /> systems. Each monitoring mode—depending on the eco- walls is accomplished through the use of an electronic sensor <br /> nomics of the installation—is designed to detect a leak in and the tank-mounted hydrostatic reservoir. <br /> either the primary or secondary tank as well as the attached <br /> collar riser. <br /> Should an installation require maximum round-the-clock mon- <br /> itoring of tank interstitials, attached collar risers, and/or tank <br /> level conditions, a variety of options are available in both our <br /> LU and LPD series consoles which are pre-configured to <br /> accept frpomVvppI to 9 sensors. <br /> rlfinR5EN50R vj TM�SEN$OR <br /> COWMX PAWL <br /> l� <br /> Typical three-tank installation with control panel individually monitoring the With the interstitial space and reservoir factory-filled with <br /> attached collar risers and tanks. liquid to a predetermined level, a hydrostatic pressure is <br /> applied to the inner and outer tank walls. <br /> If a leak should ever occur in the inner tank, the liquid level in <br /> Controller/Monitor the reservoir will drop as monitoring fluid drains into the pri- <br /> mary tank. Should a leak develop in the outer wall, the moni- <br /> toring fluid will drain into the excavation and again lower the <br /> The control unit provides LED's(indicator lightsi to show the level of monitoring fluid. <br /> individual operating condition of each sensor in the installa- <br /> tion.The control unit,also equipped with an audible alarm, Should a leak occur in the outer wall during high-groundwa- <br /> may be located up to 2000'from the installation. ter conditions, the level of the monitoring fluid will rise as.out- <br /> side water seeps into the interstitial space. In any of these situ- <br /> ations, a change in the liquid level beyond the acceptable lim- <br /> its will activate the alarm. <br /> Control Unit(Three-Channel Panel Shown) <br /> The controller is also equipped with a test switch to prove <br /> the system functional.The control panel is weather and <br /> corrosion-resistant. Power(green) —The system is powered. <br /> Alarm(red) —The alarm light, plus an audible warning,will indicate <br /> • Lt O either a high level condition for reservoir sensors or a <br /> fuel condition for PD-Series Sensors. <br /> ®PD1 Q <br /> Alarm(yellow) —The alarm light, plus an audible warning,will indicate <br /> ®PD2 O either a tow level condition for reservoir sensors or a <br /> water condition for PD-Series Sensors. <br /> O Horn <br /> TEST <br /> o , ,OFF, (Units up to nine channels The electronic monitoring system is listed by Underwriters Laboratories,Inc. <br /> also available.) The monitor sensors for the reservoir and riser are intrinsically safe for use in <br /> Class 1,Group D.hazardous locations,as defined by the National Electrical Code. <br /> 14 <br />