High Precision Inventory Tank Gauging System

Technical DescriptionRadio LinkIt is possible to use a high speed UHF Radio Linkinstead of cable between the control room and theField Communication Unit (FCU). The link consistsof two small size UHF radio modems that areconnected to the serial RS-232 port on theTankMaster PC and to the group bus port of an FCU.The Radio Link is completely transparent andworks just like a cable connection. A HostComputer can also be connected using the samemethod.Depending on the antennas and the surroundingtopography the range is up to five kilometers (threemiles). Longer distances can be covered by usingdirectional antennas.RexSystemFCURadioModemRadioModemTankMasterPCUsing a radio link can reduce the cable cost betweenhost computer and FCU.Technical Data for Radio LinkAnntenna:Arrangement for 450 MHzFrequency range:405 - 470 MHz,Basic tuning range:2 MHzChannel separation:ation:25 kHzNumber of channels: 16Transmitteransmitter: RF Power: 500 mW / 50ΩDeviation:±2,5 kHzAdjacent channel power: < 200 nWSpurious radiation:Meets ETSI 300-113Receiver er Sensitivity:< - 108 dBmRadio Modem: Ambient temperature: -25°C to + 55 °C (-13° F to 131 °F)Size:11 x 65 x 26 mm (0.43 x 2.6 x 1.0 inch)Weight:260 g (0.6 lbs)Power supply:12 VDC at 500 mA maxApprovals:Sweden, Finland, Denmark, U.K., Switzerland, Hong Kong, FCC approval pending38