SPECIFICATIONS VX1004Sensor InterfaceVoltage InputsNumber6 single-endedRange0 to 5 voltsAccuracy±0.1 % of full scaleResolution12 bits (1 part in 4096)Counter InputsNumber2 counter or frequency1 counter onlyMaximum Input Range±15 voltsProgrammable Thresholds1.0 and 3.2 volts w/hysteresis0 and 50 millivolts w/hysteresisResolution16 bits (1 part in 65,536)Serial InputsSDI-12Industry-Standard Smart-Sensor InterfaceSensor Excitation+5.000 volts DC±0.1% over temperature+12 volts switched batterySystem MonitoringBattery±0.1 voltsInternal Temperature±0.5 degrees CelsiusSatellite TX Forward PowerWattsSatellite TX Fail-safe StatusOK / TrippedSatellite TX Lock StatusOK / BadControl OutputsNumber4TypeOpen collector to groundUser InterfaceSerial I/ORS-232Fully menu driven ASCIIData Download and System SetupIntegral I/OKeypadLCD DisplayMemoryData LoggingBattery-backed SRAM58,000 data pointsSystem ProgramEPROM FirmwareSetup ParametersNon-volatile EEPROMPower SupplySupply VoltageStandard Applications8 volts to 16 voltsSatellite Certification Range10.5 to 14.5 voltsSupply CurrentStandby0.5 milliampsData Acquisition25 milliampsSerial I/O40 milliampsSatellite Standby5 milliampsTimekeepingReal-Time ClockStandard VX1004±1 minute per monthSatellite Applications1 ppmPhysicalDimensions12.3” x  3.2” x  3.0” (wxhxd)312mm x 80mm x 76mmWeight (logger only)2.5 lbs1.13 kgWeight3.0 lbs1.4  kgEnvironmentalTemperature-40°C to +60°CHumidity0 to 99 percent, non-condensingORDERING INFORMATIONModel #DescriptionModel #DescriptionVX1004LBasic Data Acquisition Unit, Wall MountVX1045VBUS Voice Response ModuleVX1004DCPData Acquisition with Satellite Transmit OptionVX1060VBUS PCMCIA Memory Expansion ModuleVX1004TData Acquisition with ALERT Transmitter/RepeaterVX1070VBUS 16 input Analog Expansion ModuleVX1004NFiberglass  Weatherproof Enclosure OptionVX1080Aquatrak^® Water Level Sensor ModuleVX10409600 Baud Telephone Modem OptionGR3230GPS Time and Position Module