USB test meter is popular among engineers and enthusiasts because of its small size, plug and play, convenient carrying, accurate reading, high playability and relatively low price. Even ordinary users can easily get started. It has become a standard configuration for charging enthusiasts, almost every one of them has one. At present, there are many kinds of USB watches on the market, and their selling points vary greatly. On USB PD Before the protocol was launched, ordinary users only need to purchase one or two USB meters to meet their needs. After that, due to PD The new USB-C physical interface and CC communication interface are used, which makes a lot of ordinary USB watches on the market helpless.
ChargerLAB It is an English website focusing on the charging field and its brand“ POWER-Z ”Currently, a measurable USB is introduced PD Instrumentation for KM001 , powerful enough to make people feel passionate. It can only be used for testing PD The meter takes full account of the complexity of the update of the charging physical interface and the diversity of charging protocols, and integrates the most common USB-A interface, MicroUSB interface and Type-C interface PD Besides measurement, it can also be used to measure various quick charges such as QC3.0/2.0.
POWER-Z KM001 The built-in OLED screen resolution is 128 × 64. The front panel is gilded with black glass fiber, and the four corners are fixed with gold sink holes. The appearance and volume are the same as those of common USB watches, and ordinary users can get started soon. The USB meter has a special ADC chip for voltage and current with measurement accuracy of 0.02% and temperature drift of 10ppm. At the same time, in order to ensure the accuracy of the current, a high-quality sampling resistor with a typical temperature drift of 20ppm and a power of 3W is also integrated. The maximum error can reach 0.01%.
The other side is POWER-Z Brand logo and website address“ www.chargerlab.com ”, the product model is: KM001 。
POWER-Z KM001 This test table integrates 6 USB ports, which can meet the test needs of most players.
Common USB-A interfaces are reserved at the head and tail for standard USB-A to MicroUSB/Type-C/Lightning data measurement.
At the same time, two currently popular Type-C interfaces are configured at the bottom to form a pair of PD communication interfaces, one of which can be used alone to test the Type-C data line. There is also an old Micro interface at the bottom to measure the data line of the old standard. There is also a HID communication port of MicroUSB on the top, which can realize real-time sampling of voltage and current and draw dynamic charts with PC software.
In addition, three white inching keys are evenly distributed on the top. From left to right, there are menu keys, left interface switch keys, and right interface switch keys.
The USB meter can be used alone or together with the communication software on the PC end. The software is divided into Chinese and English versions. We choose the Chinese version here. The interface is as follows:
PD protocol testing is the unique feature of the table and one of the most distinctive functions. The instrument is equipped with PD communication physical chip, which can capture the data packet of PD communication at the computer end.
PD communication test page.
POWER-Z KM001 Another feature of is that it supports ripple testing. Its function is similar to that of a micro oscilloscope, which can test ripples lower than 50Hz, and is sufficient for daily use.
The common QC protocol test and capacity test are certainly not worth mentioning, so we will not introduce them in detail here. In addition, the meter can also evaluate the line resistance of the charging line and the line compensation ability of the charging head. There are several more ways to play.
The following is a drawing of POWER-Z KM001. At present, this form has been listed in China. You can go to Taobao Purchase, purchase link: Jab here 。