YJ-550A or YJ-550C Fiber Optic Mini Multi-meter Optical Power Meter with Visual Fault Locator 1mw 10mw 30mw 50mw   Overview:         The mini  optical power meter is a compact and an easy-to-use testing instrument for optical fiber networks, which can be used for absolute optical power measurements as well as for relative loss measurements .        It features ingenious appearance, wide range of power measurement, high accuracy .           Applicapions:           Maintenance in Telecom and CATV        Test Lab of optical fibers  or other Fiber Optic Measurements           Key Features:           The most compact in Size, ideal for field operation        The general interface, can be directly connected to the FC/SC/ST, without complex conversion        Power measurements in dBm and  loss in dB        The user has self-calibration function, the user can calibrate the optical power meter        With wavelength memory function, boot will display the last shutdown wavelength set        Optional 10 minutes without operation, automatic shutdown function        Low battery indication           Specifications:                                     Optical Power Meter:                            Model        YJ-550A        YJ-550C                    Measurement Range        -70~+6dBm        -50~+26dBm                    Wavelength        800~1700                    Detector Type        InGaAs                    Uncertainty        ±5%                    Calibrated Wavelength        850/1300/1310/1490/1550/1625                    Accuracy        0.05dB                    650nm Visual Fault locator:                    Output Power        1mw        10mw        30mw        50mw                    Distance        5KM        10KM        20KM        25KM                    Frequency        CW/2Hz                    Wavelength(nm)        650±10                    Other:                    Operating Temperature        -10~+50 (°C)                    Auto-off Time        10 min                    Operating Time        120h                    Dimensions        128×52×22 mm                    Battery        3×AA 1.5V                    Weight        100g