Instrument Model GPT-9001A GPT-9002A Instrument Model GPT-9001A GPT-9002A 
 Rotating micro-micro-rotation angle measurement control (minimum of 1 second) 
 Method (horizontal / vertical) absolute method of reading (of diameter) Maximum rotation speed 85 ° / sec 
 Minimum reading 0.5 "/ 1" 1 "/ 5" Monitor 
 Accuracy?? 1 "2" 3.5-inch TFT color display type 
 Single distance measurement display 
 Measurement range touch screen 
 No prism mode (target: white walls) computer unit 
 In low light and no sun 1.5m ~ 250m/5m ~ 2000m (non-prism long mode) operating system WinCE.NET 4.2 
 A prism model CPU Intel PXA255 400MHz 
 Single prism (condition 1) 3,000 m RAM 64MB 
 Condition 1: haze, visibility about 20km, moderate sunlight, slight heat flash ROM 2MB (Flash ROM) +64 MB (SD card) 
 No prism mode (diffuse reflective surfaces) I / O RS-232 serial port 
 1.5m ~ 250m? 5mm) mse USB (B type), Bluetooth 
 5.0m ~ 2000m ± (10mm +10 ppm × D?) Mse CF card slot (Ⅱ) 
 A prism mode ± (2mm +2 ppm × D?) Mse tilt compensation 
 Minimum reading type biaxial 
 Refined method of measuring liquid-type patterns 0.2mm/1mm 
 Coarse measurement mode 1mm/10mm compensation range ± 6 ' 
 Level of sensitivity of measurement time 
 Fine measurement mode 1mm: about 1.2 seconds (the first 3 seconds) circular level 10 '/ 2mm 
 0.2mm: 3 seconds (the first 4 seconds) long spirit level 30 "/ 2mm 
 Coarse measurement mode 10mm: about 0.3 seconds (the first 2.5 seconds) the power 
 1mm: 0.5 sec (initial 2.5 seconds) on-board battery BT-61Q output voltage 7