Ruideng 33v/3a 7in1 Blue Oled Multifunction Tester Meter Voltage Current Time Temperature Capacity Meter Electrical Voltmeter Ammeter

Description: Brand: RD Voltage measuring range: DC0.00-33.00V Current measuring range: DC0.000-3.000A Input voltage: 4-20V Ambient temperature: -15 ~ 65 Dimensions: 48 * 29 * 22 (mm) Button Function Instruction: In the display interface, click the button to switch data set; keep pressing button to clear the accumulated data to zero. The component aging and temperature variation after long-term use may appear tiny error when it measures small current. To avoid this error, you can unplug the current wire socket and keep pressing the button to connect power supply, until the screen display "AAA" then loose button. The Wiring Diagram Instruction: Please ensure proper wiring in strict accordance with the wiring diagram. Using Isolated Power Supply The two power supplies must be isolated and don't connect any load. The highest voltage of isolated power supply is 20V Using DC-DC converter to power supply The black thin wire connects nothing and you should use insulator wrap it to avoid short circuit. The DC-DC converter must be common cathode structure. Using system to power supply The black thin wire connects nothing and you should use insulator wrap it to avoid short circuit. Package included: 1 x RUIDENG 33V/3A 7in1 Blue OLED Multifunction Tester Meter With Cable