... m <2000m TDR + Bridge Optical Fiber Identifier Get Fast Network Tester 8 KM Chapter1 General 1.1 General informationSW_TC880 =TDR + Bridge ... : 2mDISPLAY Type: High resolution LCD (320*240 pixel) with backlightBRIDGE PARAMETER:Poor Insulation Range Detected: 0-30MΩTest Voltage: 100VTEST MODE ... the LCD, they are FUNC, RANG, VOP, ZOOM, FIND, FILE, LINE, press RANG as Fig. 1.3 shows, then the right ...