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File MR13544 Vol. 1 Sec. 2 Page 2 tissued: 2-1-91 <br />and Report <br />The console includes the provision for conduit connection to <br />the probe assemblies and the source of supply; has an interface, <br />display and printer. <br />The protection method for the intrinsically safe circuit <br />consists of a 100K ohm metal film resistor and two 0.002 uF <br />blocking capacitors. <br />ModelThe 000 is identical to the Model 2000 except <br />addition of a module wi,th intrinsically safe outputs for use in <br />Class 1, • • hazardouslocations for 11 of r <br />probes. <br />The protection method for the intrinsically safe circuit of <br />the module consists of the power transformer (T1) resistor (R1) <br />and seven optical isolators (ICI-IC7) which have been designated <br />as "protective components." The protective transformer reduces <br />the voltage available to the intrinsically safe circuits. The <br />protective resistors provide current limitation to the <br />intrinsically safe circuit terminals to which the probes are <br />connected. <br />installation •. equipment intended <br />• .. f be <br />in <br />accordance with the 'National Electrical Code, ANSI/NFPA 70, the <br />manufacturer's installation instructions and the local authority <br />having jurisdiction. The supply circuit is considered to be <br />Class 1, tthe probe circuits are considered to be Class 2- and the <br />relay <br />a • • are intended for connection • an <br />externalli circuit are considered to • - Class 1. <br />' • X31" • • •` � � .. � <br />A. Hydrocarbon Detection Probes - The products covered by <br />this Report comprise liquid or vapor detection systems. The <br />liquid • - - • systems are . • to detect _ s • <br />ng <br />1 • • - • _ petroleum <br />y ether, - • <br />gasoline. ••detection sys�ems are intended to detect the <br />following mater4als: gasoline, gasohal, diesel No. 2, Jet -A, and <br />aviation gasoline. The control unit can be connected to 16 <br />• • <br />RAF/N EM: d `c <br />=C _ter'. <br />1 <br />