DANIU High-precision USB Tester Instrumentation Voltage Ammeter / Capacity Electricity Meter / Power Meter

Features: 1. Adopt ST imported chip to make more measurement parameters. Increase capacity test, power test, output time calculation function. 2. No button design automatically switches the display position every 5 seconds. 3. The internal resistance is as low as 10 milliohms. It reduces its own power consumption and also ensures sufficient output current. 4. Up to 15V can be input. Support QC2.0 charging mode. 5. Has an ultra-wide voltage range. (Connected to a lithium battery and a normal 12V battery can also be used. The gospel of the refurbishers) Specification: Self-power consumption: red 17MA green and blue 11MA Refresh rate: about 3 times / S Test accuracy: voltage 0.01V current 0.01A Voltage range: 3.50V-9.99V-15.0V Current range: 0.00A-4.50A Power range: 0.00W-75.0W Capacity range: 000mAH-999mAH-1.00AH(1000mAH)-999AH(999000mAH) [Super large range, decimal point automatic movement] Time range: 0-99 hours, 60 minutes [Only when there is load, it will be paused when there is no load] Current internal resistance: 10 milliohms Dimensions: 53*24*14MM [plastic part shape does not contain plug] Package includes: 1x USB Tester Note: Similar products, there is no fine-tuning function, after the instrument is used for a long time (or after repair) the component parameters will inevitably change. The difference between the display and the actual, you need to fine-tune. Fine-tuning how to use: When the instrument is used for a long time, the component parameters will be aging, which is a normal phenomenon. Therefore, the instrument should have a fine adjustment function. This device abandons the traditional potentiometer adjustment, avoiding the instability caused by the mechanical rotation of the potentiometer. 1. Voltage trimming: When the meter is working, use the camera to short the corresponding two holes. After a few seconds, it will enter the adjustment state. At this time, the last decimal point will be on, indicating that you have entered the adjustment state. The displayed voltage The value will increase slowly. After you reach the data you want, you can take it out. If you want to reduce the data, insert the camera shortly within 5 seconds after taking out the camera, and the data will slowly decrease. Take it out. Adjust to this point. 2. Current trimming: The mode and voltage trimming are exactly the same. 3. Current zero: If there is no output current, the current display is not 0 or the first digit displays a negative sign, it means that it needs to be re-zeroed. The method is: short circuit with the camera without power supply After the current is fine-tuned, the power is turned on again. After 3 seconds, the calibration will be completed automatically. Be careful not to connect the load. Tip: When performing voltage trimming, wait until the display data is automatically switched to the voltage level before operating. Current trimming is the same. Details pictures: