Specification:Item Type: MultimeterMaterial: ABSModel: BL400B Second GenerationSize: Approx. 165 x 80 x 30mm/6.5 x 3.1 x 1.2inPower: 0.1-400WVoltage: 12-60VCurrent: 0-20APower Mode: Solar Panel PowerFeatures: LCD Display FunctionGross Weight: Approx. 445g/15.7ozTarget Audience: PV Panel Manufacturers, PV Panel Distributors, PV Panel Installers, PV Panel Users, PV Panel FansTROUBLESHOOTINGERRORCAUSEEXPLANATIONNo displayReverse connection protectionPlease check the input polarityDisplay over powerOver rated powerUsing within the rated power range of the instrumentDisplay over temperatureOver temperature protectionTo be used after coolingDisplay over voltageOver voltage protectionUsing within the rated voltage range of the instrumentDisplay over currentOver current protectionUsing within the rated current range of the instrumentHow to Use:1. Automatic MPPT detection method: When the automatic MPPT test button is pressed, the instrument automatically adjusts the current power value of the test interval time according to the test results and refreshes the digital display.Example: When the power of the solar panel is 100W, it refreshes every 5 seconds; when the power is 300W, it refreshes every 15 seconds.2. Manual MPPT test method: When the manual MPPT test button is pressed, the instrument starts to scan the maximum power point and refreshes the digital display.Package List:1 x Multimeter2 x Connecting Cable2 x Cable1 x English Manual1 x EVA KitNote:1. Please be sure to use this product within the rated voltage & current power range.2. Please be sure to disconnect the photovoltaic board from other equipment or loads before testing.3. Please allow some errors due to manual measurement.