10VOutputStability90days( ppm):0.91Year( ppm):1.8Predictability 0.5ppm/yeartypicalAfter5points,3mo.apartTemperatureCoefficient(15-35 C) 0.05ppmNoise(rms)0.01to10Hz: 0.10ppmRMSStandarddeviationof90dayregression: 0.10ppmRMSHysteresisrecovery 0.1ppm(afterconditioningcycleandbatterydischarge)OutputCurrent12mAOutputResistance 10mOhmBatteryTypeNiMHBackupPeriod16hrsfromfullychargedRechargetime(typical)2hoursHalfLife5yrsEnvironmentTemperatureOperating:+15 Cto35 CTransit:-18 Cto45 CWarm-upperiod:10min.to 0.1ppmoffinaloutputvalueGeneralSpecificationsPower,batterylife 1W12VDCConnectionYesDimensionsDimensions(HxWxD)137x85x290mm(3.5x2.1x11.4inch)Weight2.1kg(4.5Ibs)SafetyUL3111,CEmarkedEN61010-1-1:1993/A2:1995CETL