SMAKN Digital Voltmeter Ammeter AC 130-500V 50A Voltage Ampere Multimeter

*Measuring range: AC 130-500V; AC 50A. *Accuracy: 1% +/- 2 digits. *Measurement speed: about 2 times / seconds. *Working mode: voltage and current dual display; 2-wires. *Color of housing: black. *Display: 0.39 inch LED digital tube display, voltage - red, current - green. *Dimensions: 70mmx40mmx40mm. *Installation size: 68x38 mm. *Transformer inner hole: about 11 mm. product manual: *Fixed: transformer is fixed on the instrument. *AC voltage, current meter with the screen, color, dual display, highlight large font. Instrument wiring is simple: *Two-wire: no additional power supply connected, red, black to simultaneously measure voltage power to the meter (no sub-polar). *Current tests do not need to buy another transformer, instrument transformer comes with high precision. *Built header trimming potentiometer can calibrate their own voltage, current error. Note: *Instrumentation wiring sequence is: first connect the current loop line, 220V voltage finally connected, after turning on the 220V power supply, the instrument will not be able to touch any components and circuits behind, to avoid electrical shock hazard. *This table uses capacitor step-down design principles, because the higher the frequency the smaller the impedance of the capacitor, it is not suitable for use in high-frequency electronic speed control, non-mains frequency sine wave, or other high-frequency components of the occasion, or easy to burn . Feedback: We greatly appreciate your POSITIVE feedback. Please do NOT leave negative feedback without asking for help. Our aim is to provide Top Level Customer Service, so we will try our best to solve any problem.Thank you very much!