USB Charger Tester Doctor USB Voltage Current Meter Voltmeter Ammeter Battery Capacity Tester Mobile Power Detector

                                                       Measuring range 3-20V(V)         

                   Input voltage 3-9V(V)         

                   Output voltage 3-9V(V)         

                   Input current:0-3A         

                   Output current:0-3A         

                   Voltage Resolution:0.01V         

                   Current Resolution:0.01A         

                   Ambient temperature -10-60(°C)         

                   Voltage measurement error 1%         

                   Length:59mm         

                   Total length(+USB):73mm         

                   Width:23mm         

                   Height:13.5mm         

                              The IN-input connects to the output port of the charger          

                     Reset-clear key, press 3-5 seconds to clear the screen          

                     OUT-output connected to the USB port of the data cable          

                     Input voltage display window (3-20V), accuracy +-1%          

                     Charge current display window (0-3A), accuracy +-1%          

                     Battery capacity display window (0-99999mAh)          

                     Working hours display window (0-99H) unit minutes          

                     Working time and space display memory function after power of          

   A designed according to the principle of ohm's law and through the resistor in parallel through a different switch, can produce 3 kinds of resistance of a new USB electronic load resistance discharge, when all the switch opens, is 2.2 ohm/10W, 4.7 ohm/10W, 2 kinds of resistance in parallel at the same time, in 5V voltage almost can produce 3A discharge current.

 The actual current size, please according to ohm's law: I = U/R

 Resistor in parallel calculation formula: R=1/(1/R1+1/R2+...+1/Rn)

 K1=4.7Ohm/10W , K2=2.2Ohm/10W

 Note:

   Resistance will be hot when the module is working, the temperature at around 80 ~ 85 °c, please beware hot.

 Test Method:

   1, insert the USB 1-2A output device port. 

  2, Toggle switch allows the output current between 1A and 2A Switching.

   Application:

 You can easily test the 1-2A output  mobile power, mobile phone charger, USB power supply output current is standard or not,

 USB Charger Doctor Mobile Battery Tester Power Detector Voltage Current Meter

 This is the mini USB meter. It can measure voltage, current, power and capacity

 It can clearly display all the data.

 Can easily measure the USB ( PC USB, cell phone charger, car charger , mobile power , etc. ) port and device operating current and the output voltage charge-discharge capacity, performance, and judge the performance of the charging cable charging equipment, this tester can meet the requirements !

 Fit to factories, laboratories and personal use, wide range and Easy to use, easy to take alone, no additional power supply, Plug and play.

 Material: Plastic

 Color: Black

 Voltage: 4-20v+/-1%

 Current: 0-3A+/-1%

 Time: 0-99H

 Net weight: 19g

 Size:59mm*23mm*13.5mm(length*width*height)

 Specifications:

 Compatibility: USB v2.0 standard

 Interface: Network:USB

 Serial:RS-485

 Port: One Independent RS-485

 Connector: Network: USB-type A connector

 Serial: Screw terminal

 Transmission speed: 600bps to 115.2Kbps

 Parity bit: odd, even, none

 Data bit: 5, 6, 7, 8

 Stop bit: 1, 1.5, 2

 Driver Support: Windows 2000/2003/XP/Vista/7 (32bit and 64bit)

 Power Consumption: 1.5W , USB 5V

 Max. Distance: 4000ft (1200m) @ 19.2Kbps

 Case: Blue transparent ABS

 Operating Temperature: -20°~+65°

 Operating Humidity: 20% to 95% (non-condensing)

 Transmission distance:1200m(Max)

 Overview

 USB To RS485 converter allows PC users to connect their RS-485 devices

 to systems that use USB interface. By attaching the converter to a PC, it will no longer be

 necessary to open the chassis or turn off the PC to install the hub. With the converter,

 the user instantly gets one extra high-speed RS-485 ports. In addition, since

 the power is derived from the USB port, there are not any cumbersome power adapters.

 This makes the converter especially suitable for PLCs, printers, POS system and industrial

 control devices. 

 1. Product features:

 Simultaneous display of voltage, current and mAH data for easy viewing

 Can detect mobile power output mAH

 Multi-group detection data storage, power-down storage function

 Does not affect data transmission

 The accuracy is higher, and the current parameters will not jump randomly.

 The USB male head and the MicroUSB port are dual powered, which can detect the quality of the MicroUSB cable.

 Current sampling 25 milliohms, less loss

 With precision current calibration function, the current accuracy is higher (it has been calibrated when shipped)

 2. Performance parameters:

 Input voltage: 3V-15V (actually within 15V)

 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 0.1 ohms

 Test content: battery voltage, current, discharge capacity (10 sets of data in total)

 3. Function introduction:

 3.1. Measure voltage and current:

 Plug the USB male plug into the 5V charger, and the female socket into the mobile phone and other equipment, and directly read the voltage and current parameters.

 3.2. Measure the quality of MicroUSB cable:

 When plugging mobile phones and other devices into the female socket, first plug the 5V charger with the male head of the machine, remember the voltage, and then use the MicroUSB cable to insert the 5V charger into the MicroUSB hole of the machine and remember the voltage. The smaller the voltage difference, the better the quality of the MicroUSB cable. .

 3.3. Measure the output capacity and efficiency of the mobile power supply:

 First connect the mobile power supply to the machine, turn on the mobile power supply, long press the button until the capacity data returns to zero, insert the mobile phone and charge it for several times until the mobile power supply runs out of power and automatically shuts down. When the machine is turned on next time, the displayed capacity is the mAH output by the mobile power supply. 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, and double-click the button to switch to the previous set of data.

 3.5. Data reset:

 Press and hold the button for more than 3 seconds to clear the current group data.

 4. Application examples:

 4.1. Test the charging voltage and current of mobile phones, tablets, power banks and other electrical appliances:

 Plug the USB male head of the detector into the 5V USB charger, and the female socket into the mobile phone, tablet, mobile power supply and other equipment, and directly read the voltage and current parameters.

 4.2. Test the output voltage and current of the power supply and mobile power supply (must be matched with the load):

 Plug the USB male head of the detector into a 5V USB charger, and the female socket into a USB load device, and directly read the voltage and current parameters.

 4.3. Test the voltage drop of the MicroUSB data cable to compare the overcurrent capability of various cables (must be matched with the load):

 Plug the USB male head of the data cable under test into the 5V USB charger, the MicroUSB male head is inserted into the MicroUSB female socket of the USB tester, and the USB female socket of the USB tester is plugged into the USB load device to directly read the voltage and current parameters.

 4.4. Test the output capacity of the mobile power supply (it must be matched with the load device. Note the word "output". The nominal capacity of the mobile power supply is not tested here. The nominal capacity of the mobile power supply refers to the total capacity of the battery inside, which is the ratio of The actual output capacity is much larger! If you don't understand, please search by yourself):

 Fully charge the mobile power supply, plug the USB male end of the detector into the mobile power supply, plug the USB load into the female socket and adjust it to 1A, and discharge until the mobile power supply automatically shuts down (be sure to pay attention to the heat dissipation of the load!), this The mAh data recorded at the time is the output capacity of the mobile power supply.

 A mobile power supply is equipped with three Samsung 2600mAh batteries (total capacity is 7800mAh), the discharge result with EBD is 6108mAh, and the test result with this USB detector is 6117mah, which proves that the capacity test of the detector is quite accurate!

 Input voltage: 4-30V

 Voltage Resolution: 0.01V

 Test current: 0A-3A

 Current resolution: 0.01A

 Capacity range: 0-19999mAH

 Accuracy: 1%

 Line loss: about 0.1ohms

 Size:5.8*2.7*1.9cm(L*W*T) cable length:20cm(included USB)

 Test content: battery voltage, current, discharge capacity (10 sets of data in total)