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• liquid, temperature, depth, and water level. Based on this input, the CIM computes volumes, and stores this information for remote polling. The RS-232C Serial Interface Communications port permits access to TLS-250 information from remote locations via telephone lines. This serial interface is capable of handling up to 16 polling stations from centralized remote locations (SCC) . The output of the serial port can be formatted for teletype or computer ( IBM-PC) interface. The teletype output printout displays formatted reports with spaces and headers on most 72-column printers or CRT terminals. The computer output gives the information in packed data format (without spaces , carriage returns, etc . ) and is the most efficient way to interface the CIM. The TLS System has three modes of operation - Leak Detection , Tank Inventory , and Automatic Delivery Reporting . When the leak monitor mode is activated, the TLS System continuously monitors fuel levels in each tank and can detect small losses. An hourly report on each tanks shows temperature-compensated inventory changes to 0. 1 gallon based on inventories when the tank leak mode is initiated . An Inventory Loss Alarm feature can initiate a signal to an alarm on the premises, to a security agency or to a central management location when a loss of 25 gallons occurs during any one-hour period. The Leak Monitor is activated through a pushbutton mounted on the front panel , or remotely through the RS-232 Telecommunications Interface. The Tank Inventory Report presents the current status of each tank . It provides station location, date and time , volume of fuel, level of fuel, water level and temperature. The Automatic Delivery Increase Report features are generated two minutes after fuel is delivered to the tank. The printout includes date, time , volume and temperature before and after the increase and the net increase in inventory. Security Code The system is designed to prevent unauthorized use from outside persons by the security code feature . Each site location will be assigned a Security Code in place of the address code.