Today I have another Chinese on my review.tester, but this time, it seems to me, very interesting. The model combines three separate devices for testing at once - a standard USB tester with a color screen, USB electronic load with continuously adjustable current and a wireless charging detector. I have never seen such a combine in one building before. Usually, models were divided either into full-fledged USB testers, or into USB loads (sometimes with a non-informative segment screen), but not like all of this together. In addition, the novelty also has a coil for testing wireless charging technology, as well as bluetooth for communication with a phone or PC. We will analyze all these features in detail later in the review.
- Model: Q7-UTL
- Device Type: USB Tester, USB Load, Wireless Charger Tester.
- Measurement range: By voltage - 4.5-21 V, by Current - 0-2.800A
- Measurement range of accumulated capacity: 0-99999mAh
- Energy measurement range: 0-99999mWh
- Resistance measurement range: 1.5-9999.9Ω
- Screen brightness: 5 levels (from 0 to 5)
- Timer: Yes, range: 99h, 59m, 59s
- Size (voltage): 0.01V
- Size (current): 0.001A
- Voltage measurement error: ± (0.2% + 1 unit)
- Current measurement error: ± (0.8 ％ + 3 units)
- Time measurement range: 0-99ch59m59s
- Temperature measurement error: ± 3
- Auto screen off: 1-9 minutes
- Display: TFT, 1.44 inches
- Auto detection of fast charging: Yes - QC 2.0 / 3.0
- External power: Yes (microUSB)
- Features: Connect to PC (via cable or bluetooth, to phone on Android (via bluetooth)
- Material: Plastic
Link to software repository: www.mediafire.com/folder/1c04afq923397/A3
Packaging and appearance
The parcel arrived relatively quickly, in abouttwo weeks from china. This was a small cardboard box with double walls. Well, for this you can say a special thank you to the seller, that took care of the safety of the contents. Inside the box was another, but already metal, with a transparent window on the top cover. Does she remind you of anything ?! I immediately remembered similar, but three times smaller in size, the same metal boxes in which testers from RD and from YZXStudio came. Probably the cost they have is very cheap, once they began to send them. But this is additional protection from external influences.
The tester inside was packed tightly with foam. In addition to him, the set itself was nothing more.
As we see, the novelty is built in the same way as USB.testers from RD, YZXStudio, etc. That is, the body is interconnected separate parts of plastic and PCB. For example, the upper pad is simply decorative. Although it contains tips and other information about entrances and exits, it does not carry a useful function. Part of the text is in English, and the other is in Chinese. I translated some lines to understand what it says. It turned out that there is nothing unusual or special about them, for example, next to the USB OUT port it says that this is an output, and with USB IN - that this is an input. In addition to them on the front there is a window under the color 1.44 inch screen. According to its characteristics, it is absolutely the same as in the testers RD UM24 / C, UM25 / C, UM34.
On the reverse side there are four rubberizedlegs and cooling holes. The legs, of course, are good; they prevent sliding on the surface on one side and protect the same surface from scratches on the other, but it seems to me that they are too high and will introduce some error when testing wireless charging. I recall that for them it is very important not only the correct positioning of the coils (transmitter and receiver), but also the distance from them. The larger it is, the greater the losses. I still think to get rid of them in the future.
In the hand, of course, it’s not as convenient to hold as compact, traditional models of testers.
Let's go through the interfaces, of which there are not enough. To connect the tester to various devices installed:
- Standard USB-A IN port,
- microUSB input,
- USB-C input,
- Third-party power port (microUSB),
- Contact pad for soldering wires,
- Wireless mode through the coil,
- Bluetooth to communicate with phones or PC.
Outputs slightly fewer:
- Standard USB-A OUT port,
- USB-C output
Management can be divided into two types, the firstrelating to the navigation menu and the second - auxiliary elements. The tester menu is exactly the same as the RD UM24 model. Therefore, the buttons here are also four, two from the top and bottom sides. The module responsible for the load can be turned on or off, for this there is a special switch on the upper end. In the off position, the device can be used as a normal USB tester. When enabled, the electronic load function is added. The load current is regulated smoothly using two potentiometers with plastic handles. The bottom one is for coarse adjustment, and the top one for more subtle (exact). There are no other controls.
In addition to the above, in different parts of the boardsBlue LEDs are installed, which signal various operating modes. For example, when presented to a wireless station, the coil operation LED starts to work on the bottom board. In the same way, but already on the top board there are two LEDs of bluetooth operation. One is always blinking, thereby saying that this module is turned on and can be connected to the tester. The second is activated only after successful pairing, while the first stops blinking and also switches to the constant glow mode.
Menu. Virtual screens
Compared to past models that II had a chance to test and hold in my hands, this is the most dimensional. The length including the port and handles is 93mm, without them is 59.6mm, width is 50.9mm and height is 54.2mm.
Below is a visual comparison of the review hero with testers: RD LD25, RD LD25 and Juwei-J7-4T.
Next in line is the internal structure. Here it is something similar to devices such as the RD LD25 and RD LD25.
The module responsible for the USB tester functions consists of: a 1.44-inch color TFT screen, a main controller - STM8S005K6T6C
, which has on its board 32Kb for the data of the program code and 128 bytes for other data, the Bluetooth module from Beken - BK3231
version 3.0, ports USB-A (in, out), USB-C (in, out), microUSB in, microUSB PS and control buttons. There is also a trimmer for calibration. The tester can be very easily calibrated by voltage.
The part responsible for the electronic load consists of: a powerful bipolar transistor Tip 122
up to 5A, pulse voltage converter MC34063A
voltage regulator 6203A
current shunt to 0.05 ohms.
Wireless charging detector consists of: a copper coil, a NU1618 controller and a field-effect transistor TC 4953
The soldering quality is average, there are many traces of unwashed flux. The rest of the photo parsing posted under the spoiler below.
The insides in the details
Experience of use
And now the real tests. Before proceeding with them, I checked how much the tester consumes. It turned out the following, when the screen brightness level is 3 (only 5), the consumption was 0.0211A. If the screen backlight is completely off, this number changes to 0.01425A. It is a pity that there is no separate button to disable the module bluetooth. Although he does not consume much, but still. The guys from RD added this feature to the RD UM25 models, and the hero of the review was made on the basis of the RD UM 24.
The stated measurement range is as follows: the current is from 0 to 2.8A, and the voltage from 4.5V to 21V. Somewhat reduced numbers when compared with RD UM24. But in order to understand if they really correspond, they need to be checked. When activating the electronic load module, the adjustable current range available to us is between 0.083A and 2.67A. Above 2.67A, the device can not give out, although theoretically this is possible, since the powerful TIP 122 transistor (up to 5A) is used. Restrictions are programmatic. I also want to note that when the load button is turned on, the fan immediately starts to rotate, no matter if there is a current load or not. If we suddenly need a current above the voiced maximum, it can be expanded using any other load (resistive or electronic). Just connect it to the USB-A OUT. The current limit of the board itself, as in the RD UM 24 USB tester, is about 3A.
As for voltages, the device starts to work correctly from 4.45V to 25V. But if you use external power, one of the most interesting features of this model, the range is reduced to 0.00V.
Thanks to the bluetooth transmitter, the heroA review can be connected to both a telephone and a computer. Applications are used the same as for testers from RD. There are no compatibility problems, all functions work, and the screen rotates and switching groups, saving and exporting data, etc. You can safely use. The only difference is that the device is defined as an E-test, the pin-code pairing is the same - 1234.
The scope of this unusual and interestingtester extensive. You can use it just as usual USB tester and check, say, phones, other mobile devices. Find out their current consumption, battery capacity, etc.
An example of testing an Apple iPhone 7 phone.
Find out what is the actual capacity of our external battery, what capacity it gives out. Determine the maximum output current for the ports.
An example of testing an external Arun F1 Pus battery.
Test which of our cables is of good quality and which is not.
The photo below is an example of testing the resistance of a microUSB cable.
Determine whether the stated characteristics are real when purchasing a networked charger.
Thanks to the wireless charge detector, it became possible to conduct experiments on them.
And external power will now allow testing of various batteries, even with very low voltage.
The photo is an example of the test battery 18650.
Almost perfect tester that cando almost everything. There are functions of the most common USB tester, in an expanded format, a large variety of inputs and outputs are installed, a bluetooth module for communicating with a phone or PC, working with applications, there is an electronic load with continuously adjustable current (up to 2.67A). Separately, you can note the port for connecting an external power source, which on the one hand serves to reduce the errors introduced by its own consumption, and on the other - expands the range of measurements. Wireless detector technology now makes it possible to test the appropriate chargers, external batteries. This was not enough for me for a long time. There is also a kind of voltage calibration function, which may be necessary if the device out of the box lies a bit in the readings.
But without the drawbacks, it was not done. Probably the main one of them I would mention the lack of function of the trigger of the charging protocols. Well, probably the lack of the ability to disable the module bluetooth.
From 6 to 30 September in the store HIDANCE
$ 10 coupon from $ 36. Using it, you can purchase a new Atorch Q7-UTL tester for $ 29.
You can get the coupon by scanning the QR code via the Aliexpress app. The number of coupons is limited.