• RD USB 2.0 Meter High Precision OLED USB Voltage Current Power Tester
  • RD USB 2.0 Meter High Precision OLED USB Voltage Current Power Tester

RD USB 2.0 Meter High Precision OLED USB Voltage Current Power Tester

Tags: USB 2.0 meter

Availability: In stock, usually dispatched in 1 business day

  • Price:$9.31
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RD USB 2.0 Meter High Precision OLED USB Voltage Current Power Tester  



Product Description:USB 2.0-H USB safety detector.It has OLED screen, used for testing voltage, current, power and capacity of some device with USB .It has two kinds of font color on black case, blue and white for choosing what you like.

Technical Parameter:

Product model: USB 2.0 meter (H)
Voltage range: DC3.700-7.000V
Voltage accuracy: ± (0.2% + 3words)
Current range: DC0.000-3.000A
Current accuracy: ± (0.8% + 3words)  
Capacity accumulation: 0-99999mWh-700Wh
Capacity resolution: 1mAh;1mWh
Product weight: 10g (package 30g)
Idle current: about 10mA
Display screen: 0.91” OLED screen
Update rate: 2 times/s
Product size: 57x20x10mm (LxWxH)
Display screen: 0.91 inch OLED screen

Operating instructions:
When contact the power supply, the screen shows welcome window firstly and then comes into main interface. The first line displays voltage, power and data set. The second line displays current and accumulated capacity.
- Current zero calibration function
Because of the influence of component aging and temperature variation after long-term use, the error may become bigger when it measures small current. So you can keep pressing the button on the back to connect power supply in the no-load terms, until the LED lights. The calibration is accomplished.
- Over-voltage and Under-voltage reminding function:
When the voltage is over 5.3V (less than 4.7V), the arrow  () will be flashing to remind the voltage is too high (low). When the voltage becomes to 4.7V-5.3V, the arrow will be disappeared.
In the main interface, you can click the button to switch data set one by one. And it provides for storing and checking 0 to 9 totally ten groups data set.
- Capacity stored function
When data set is between the 1 to 9 group, the current capacity will be stored after power off. And the stored capacity will be accumulated after power on. When the data set is 0 group, the current capacity will be stored after power off. When power on next time, the stored mAh is blinking displayed. When the new mAh is up to 1 mAh, the stored mAh will be covered, and the values will start over.
In the main interface, click 2 times the button on the back (the time interval of the two times is within 0.5s), then you can get into data check window and see the capacity of the current data set. In this window, you can click the button to check the next data set, and when you keep pressing the button more than 2s, the current data set will be cleared. And if you click the button two times, it will come back to the main interface.
- Capacity unit switch function:
   In the main interface, keep pressing the button, until the BLN lights (time about 2s), loose the button, the capacity between mAh and mWh is switched.
- Screen rotation function:
 In the main interface, keep pressing the button, until the LED lights and then goes out (time about 4s), release the button, the screen is rotated and automatically stored for being used next time conveniently.
- Shut-down screen function:
In the main interface, keep pressing the button more than 6s, then loose the button, the screen display can be shut-down and come into power saving mode. In the meaning time , the LED is flashing . You can click the button to come back to the main interface.


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