... 3.quality assurance DADI Electronic Total Station DTM 300 Series SPECIFICATIONS Model DTM322A,DTM322B, DTM325A,DTM325BTelescope Length150mmMagnification30XImageErectShortest sighting dictance1 ... resolutionDistance measurement section Measureing rangeAverage weather condition, visibility about 23.5kmSingle prism800m1400mThree prism1200m2200mMinimum displayAccuracy measurement mode: 1mm Track mode: ...