USB Tester meter
1.Product Features:
Display voltage current and mAH data at the same time, easy to view
Can detect mobile power output mAH
Multi-group detection data saving, power-down save function
Does not affect the data transmission
Higher precision, current parameters will not jump around
USB male and MicroUSB port double power, can detect the quality of MicroUSB cable
Current sampling 25 mOhm, smaller loss
With precision current calibration function, higher current accuracy (already calibrated when shipped)
2, performance parameters:
Input voltage: 3V-15V (actual 15V or less)
Voltage resolution: 0.01V
Test current: 0.05A-3.50A
Current resolution: 0.01A
Capacity range: 0-19999mAH
Accuracy: plus or minus 1%
Line loss: about 0.1Ohm
Test content: battery voltage, current, discharge capacity (a total of 10 groups of data)
3, function introduction:
3.1, measuring voltage and current:
USB male plugged into a 5V charger, female socket plugged into a cell phone and other devices, directly read out the voltage and current parameters.
3.2, Measure MicroUSB cable quality:
Female socket plugged into a cell phone and other devices, first use the machine's male plug into the 5V charger, remember the voltage, and then use the MicroUSB cable from the 5V charger plugged into the machine's MicroUSB hole to remember the voltage, the smaller the gap between the voltage MicroUSB line quality is better.
3.3, measure the output capacity and efficiency of the mobile power:
First connect the machine to the mobile power, open the mobile power, long press the button until the capacity data to zero, inserted into the cell phone many times until the mobile power is no power automatically shut down. The next time you turn on the machine shows the capacity of the mobile power output mAH. note that this mAH is much smaller than the nominal mAH, output mAH * output voltage 5V / battery mAH * battery voltage 3.7V = mobile power efficiency.
3.4. Data switching:
Click the button to switch to the next set of data, double-click the button to switch to the previous set of data.
3.5, Data Zeroing:
Press and hold the key for more than 3 seconds to zero the current set of data.
4, application examples:
4.1, test cell phones, tablets, mobile power and other electrical appliances charging voltage and current:
The USB male connector of the tester is plugged into the 5V USB charger, and the female connector is plugged into the cell phone, tablet, mobile power and other devices, and the voltage and current parameters are read out directly.
4.2 Test the output voltage and current of the power supply, mobile power (must match the loader):
The USB male connector of the tester is plugged into the 5V USB charger, and the female connector is plugged into the USB loader to read out the voltage and current parameters directly.
4.3. Test the voltage drop of MicroUSB data cable to compare the over-current capability of various cables (must match the loader):
The USB male of the data cable under test is plugged into the 5V USB charger, the MicroUSB male is plugged into the MicroUSB female of the USB tester, the USB female of the USB tester is plugged into the USB loader, and the voltage and current parameters are read out directly.
4.4 Test the output capacity of the mobile power (must be combined with the loader.). Note that the word "output", the test here is not the nominal capacity of the mobile power supply, the nominal capacity of the mobile power supply refers to the total capacity of the battery inside, is much larger than the actual output capacity! (Customers who do not understand, please search for yourself):
The mobile power supply is fully charged, the tester USB male plug in the mobile power supply, the female connector plugged into the USB loader and adjusted to 1A gear, has been discharged to the mobile power supply automatically shut down (be sure to pay attention to the loader's heat dissipation!), then the recorded mAh data. The mAh data recorded at this time is the output capacity of the mobile power.
A mobile power loaded with three Samsung 2600mAh battery (total capacity of 7800mAh), with EBD discharge results for 6108mAh, with the USB tester test results for 6117mah, proving that the tester's capacity test is quite accurate!
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