At present, mobile phones, laptops, game consoles and other devices supporting USB PD power supply are gradually increasing USB-C to USB-C The interface is used as the communication and power transmission interface instead of the USB-A to MicroUSB interface or Type-C interface.
In order to adapt to different digital products, the voltage and current of USB PD charging have also been greatly adjusted, up to 20V/5A, i.e. 100W charging power. For ordinary digital enthusiasts, they will not buy professional instruments priced at thousands to tens of thousands of yuan. However, ordinary USB meters on the market have limited range and incomplete USB interface configuration. Monitoring the charging state of digital products has become a problem.
Recently, a USB watch named "POWER-Z" was released, which is designed and manufactured for detecting USB PD charging. It is characterized by two USB-C The bus port is used for PD power test, while retaining the USB-A and MicroUSB ports on the traditional USB meter. Users can continue to use these two interfaces to test QC, FCP, MTK PE fast charging equipment. The range of the meter is 2~24V/0~5A, and the accuracy is maintained at 0.0001V/A.
The front of the "POWER-Z" USB PD meter is equipped with a 1.44-inch LCD screen, which accounts for about 1/2 of the total.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224306ymxa1c1q81x4ium6.jpg)
The silk screen on the top of the back is "USB PD Charging Detector", a USB meter specially used to test PD. The bottom is marked with three interfaces, namely MicroUSB, Type-C in and Type-C out, and the range of the meter is 2~24V/0~5A. When measuring PD equipment, only two C-C lines need to be connected to Type-C in and Type-C out interfaces respectively, and then connected to power supply and power supply equipment.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224318v7gl71ul0nzqk7ul.jpg)
Below the letters is the corresponding interface. The table adopts a three-layer structure. The upper and lower parts are protected by glass fiber, and the middle part is the circuit board.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224322vxlhljx7vw107s7q.jpg)
The USB-A male connector is used to connect the charger, power bank and other power supply equipment.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224324ivivh92lvbgi2vyl.jpg)
The tail uses a green special USB-A female connector, which can pass 5A high current.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224326efd4ylmcy00l9fcr.jpg)
There is also a inching function button on the side.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224327nci6vvo78c4m8694.jpg)
USB watch boot effect picture. (Actual use can only be displayed with power supply)
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224330x4s4po777b8upshv.jpg)
When measuring PD, the dial displays voltage, current and power from top to bottom. The blue font on the left of the bottom box shows the internal temperature of the meter, the green font on the right shows the charging protocol, and the white font shows the voltage on USB D+and D -.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224332rw8hig9ih828zhis.jpg)
Test the Nintendo handheld switch charging.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224334follirmidj5dkoqm.jpg)
Test the charging of Xiaomi 5 mobile phone.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224336zsu4fty5kjr5jfnt.jpg)
Test millet 45W USB-C The charger charges Zimi No. 10 PD mobile power supply.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224338fhxbzqdah35hqh1d.jpg)
Use the function keys to switch to the battery capacity statistics interface, and make statistics in mAh and mWh units respectively. The red font "9" in the lower left corner means that this table can record 0-9 for ten groups of data, which is very convenient.
In addition, the measurable line resistance is one of the features of the USB meter, and the graphical operation interface is very easy to use. The specific operations for measuring the wire resistance are as follows:
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224354g8nlazy6oz3yofro.jpg)
Step 1: Insert the meter into the USB charger without connecting any load, and step 1 is displayed on the upper right corner of the meter.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224404of4f64fvdnxxnvpf.jpg)
Step 2: Connect the load, adjust the current to 1A or 2A, and display step 2 in the upper right corner of 2A used for demonstration.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224410g949bmeot921ks4m.jpg)
Step 3: Unplug the USB meter, connect the charger and bUSB meter with the wire to be measured (either MicroUSB or Type-C), and step3 is displayed on the upper right corner.
!["POWER-Z" launched the first USB meter for professional test PD with high playability - charging head network](https://bbs.chongdiantou.com/data/attachment/forum/201704/22/224413lqxqztg60q8al5f0.jpg)
Step 4: Insert the load adjusted in the second step of the load, wait for a moment to display the results, and the top right corner displays DONE!.
In addition to the powerful functions of measuring charging, battery capacity and line resistance, the meter is also highly playable. STM32 programmable single-chip microcomputer is used inside the table. Users can use DIY boot interface and various firmware, and the upper and lower fiberglass panels can also be replaced at will.
At present, this form is about to come into the market. Please look forward to it.